⬆️ Bump github/codeql-action from 3.28.9 to 3.28.10 (#4661)

Bumps [github/codeql-action](https://github.com/github/codeql-action) from 3.28.9 to 3.28.10.
- [Release notes](https://github.com/github/codeql-action/releases)
- [Changelog](https://github.com/github/codeql-action/blob/main/CHANGELOG.md)
- [Commits](9e8d0789d4...b56ba49b26)

---
updated-dependencies:
- dependency-name: github/codeql-action
  dependency-type: direct:production
  update-type: version-update:semver-patch
...

Signed-off-by: dependabot[bot] <support@github.com>
Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

.cirrus.yml

@@ -1,22 +1,17 @@
-kind: pipeline
-name: test-on-arm64
+arm_container:
+  image: gcc:latest
 
-platform:
-  arch: arm64
-
-steps:
-- name: build
-  image: gcc
-  commands:
+check_task:
+  check_script:
   - wget https://github.com/Kitware/CMake/releases/download/v3.20.2/cmake-3.20.2.tar.gz
   - tar xfz cmake-3.20.2.tar.gz
   - cd cmake-3.20.2
   - ./configure
-  - make cmake ctest -j10
+  - make cmake ctest -j4
   - cd ..
   - mkdir build
   - cd build
   - ../cmake-3.20.2/bin/cmake .. -DJSON_FastTests=ON
-  - make -j10
-  - cd test
-  - ../../cmake-3.20.2/bin/ctest -j10
+  - make -j4
+  - cd tests
+  - ../../cmake-3.20.2/bin/ctest -j4

.clang-format

@@ -1,84 +0,0 @@
-#AccessModifierOffset: 2
-AlignAfterOpenBracket: Align
-AlignConsecutiveAssignments: false
-#AlignConsecutiveBitFields: false
-AlignConsecutiveDeclarations: false
-AlignConsecutiveMacros: false
-AlignEscapedNewlines: Right
-#AlignOperands: AlignAfterOperator
-AlignTrailingComments: true
-AllowAllArgumentsOnNextLine: false
-AllowAllConstructorInitializersOnNextLine: false
-AllowAllParametersOfDeclarationOnNextLine: false
-AllowShortBlocksOnASingleLine: Empty
-AllowShortCaseLabelsOnASingleLine: false
-#AllowShortEnumsOnASingleLine: true
-AllowShortFunctionsOnASingleLine: Empty
-AllowShortIfStatementsOnASingleLine: Never
-AllowShortLambdasOnASingleLine: Empty
-AllowShortLoopsOnASingleLine: false
-AlwaysBreakAfterReturnType: None
-AlwaysBreakBeforeMultilineStrings: false
-AlwaysBreakTemplateDeclarations: Yes
-BinPackArguments: false
-BinPackParameters: false
-#BitFieldColonSpacing: Both
-BreakBeforeBraces: Custom # or Allman
-BraceWrapping:
-  AfterCaseLabel: true
-  AfterClass: true
-  AfterControlStatement: Always
-  AfterEnum: true
-  AfterFunction: true
-  AfterNamespace: false
-  AfterStruct: true
-  AfterUnion: true
-  AfterExternBlock: false
-  BeforeCatch: true
-  BeforeElse: true
-  #BeforeLambdaBody: false
-  #BeforeWhile: false
-  SplitEmptyFunction: false
-  SplitEmptyRecord: false
-  SplitEmptyNamespace: false
-BreakBeforeTernaryOperators: true
-BreakConstructorInitializers: BeforeComma
-BreakStringLiterals: false
-ColumnLimit: 0
-CompactNamespaces: false
-ConstructorInitializerIndentWidth: 2
-Cpp11BracedListStyle: true
-PointerAlignment: Left
-FixNamespaceComments: true
-IncludeBlocks: Preserve
-#IndentCaseBlocks: false
-IndentCaseLabels: true
-IndentGotoLabels: false
-IndentPPDirectives: BeforeHash
-IndentWidth: 4
-KeepEmptyLinesAtTheStartOfBlocks: false
-MaxEmptyLinesToKeep: 1
-NamespaceIndentation: None
-ReflowComments: false
-SortIncludes: true
-SortUsingDeclarations: true
-SpaceAfterCStyleCast: false
-SpaceAfterLogicalNot: false
-SpaceAfterTemplateKeyword: false
-SpaceBeforeAssignmentOperators: true
-SpaceBeforeCpp11BracedList: false
-SpaceBeforeParens: ControlStatements
-SpaceBeforeRangeBasedForLoopColon: true
-SpaceBeforeSquareBrackets: false
-SpaceInEmptyBlock: false
-SpaceInEmptyParentheses: false
-SpacesBeforeTrailingComments: 2
-SpacesInAngles: false
-SpacesInCStyleCastParentheses: false
-SpacesInConditionalStatement: false
-SpacesInContainerLiterals: false
-SpacesInParentheses: false
-SpacesInSquareBrackets: false
-Standard: c++11
-TabWidth: 4
-UseTab: Never

.clang-tidy

@@ -1,7 +1,21 @@
+# TODO: The first three checks are only removed to get the CI going. They have to be addressed at some point.
+
 Checks: '*,
+
+         -portability-template-virtual-member-function,
+         -bugprone-use-after-move,
+         -hicpp-invalid-access-moved,
+
+         -altera-id-dependent-backward-branch,
          -altera-struct-pack-align,
+         -altera-unroll-loops,
          -android-cloexec-fopen,
+         -boost-use-ranges,
+         -bugprone-easily-swappable-parameters,
+         -cert-err58-cpp,
          -concurrency-mt-unsafe,
+         -cppcoreguidelines-avoid-const-or-ref-data-members,
+         -cppcoreguidelines-avoid-do-while,
          -cppcoreguidelines-avoid-goto,
          -cppcoreguidelines-avoid-magic-numbers,
          -cppcoreguidelines-avoid-non-const-global-variables,
@@ -11,6 +25,8 @@ Checks: '*,
          -cppcoreguidelines-pro-bounds-pointer-arithmetic,
          -cppcoreguidelines-pro-type-reinterpret-cast,
          -cppcoreguidelines-pro-type-union-access,
+         -cppcoreguidelines-rvalue-reference-param-not-moved,
+         -cppcoreguidelines-virtual-class-destructor,
          -fuchsia-default-arguments-calls,
          -fuchsia-default-arguments-declarations,
          -fuchsia-overloaded-operator,
@@ -28,13 +44,26 @@ Checks: '*,
          -llvm-header-guard,
          -llvm-include-order,
          -llvmlibc-*,
+         -misc-use-anonymous-namespace,
+         -misc-confusable-identifiers,
+         -misc-include-cleaner,
          -misc-no-recursion,
          -misc-non-private-member-variables-in-classes,
+         -modernize-concat-nested-namespaces,
+         -modernize-type-traits,
+         -modernize-use-constraints,
+         -modernize-use-designated-initializers,
+         -modernize-use-nodiscard,
+         -modernize-use-ranges,
+         -modernize-use-std-numbers,
          -modernize-use-trailing-return-type,
-         -readability-function-size,
+         -performance-enum-size,
          -readability-function-cognitive-complexity,
+         -readability-function-size,
+         -readability-identifier-length,
          -readability-magic-numbers,
          -readability-redundant-access-specifiers,
+         -readability-simplify-boolean-expr,
          -readability-uppercase-literal-suffix'
 
 CheckOptions:

.github/CODEOWNERS

@@ -1,5 +1,5 @@
-# JSON for Modern C++ has been originally written by Niels Lohmann.
-# Since 2013 over 140 contributors have helped to improve the library.
+# JSON for Modern C++ was originally written by Niels Lohmann.
+# Since 2013, over 250 contributors have helped to improve the library.
 # This CODEOWNERS file is only to make sure that @nlohmann is requested
 # for a code review in case of a pull request.
 

.github/CODE_OF_CONDUCT.md

@@ -0,0 +1,132 @@
+# Contributor Covenant Code of Conduct
+
+## Our Pledge
+
+We as members, contributors, and leaders pledge to make participation in our
+community a harassment-free experience for everyone, regardless of age, body
+size, visible or invisible disability, ethnicity, sex characteristics, gender
+identity and expression, level of experience, education, socio-economic status,
+nationality, personal appearance, race, caste, color, religion, or sexual
+identity and orientation.
+
+We pledge to act and interact in ways that contribute to an open, welcoming,
+diverse, inclusive, and healthy community.
+
+## Our Standards
+
+Examples of behavior that contributes to a positive environment for our
+community include:
+
+* Demonstrating empathy and kindness toward other people
+* Being respectful of differing opinions, viewpoints, and experiences
+* Giving and gracefully accepting constructive feedback
+* Accepting responsibility and apologizing to those affected by our mistakes,
+  and learning from the experience
+* Focusing on what is best not just for us as individuals, but for the overall
+  community
+
+Examples of unacceptable behavior include:
+
+* The use of sexualized language or imagery, and sexual attention or advances of
+  any kind
+* Trolling, insulting or derogatory comments, and personal or political attacks
+* Public or private harassment
+* Publishing others' private information, such as a physical or email address,
+  without their explicit permission
+* Other conduct which could reasonably be considered inappropriate in a
+  professional setting
+
+## Enforcement Responsibilities
+
+Community leaders are responsible for clarifying and enforcing our standards of
+acceptable behavior and will take appropriate and fair corrective action in
+response to any behavior that they deem inappropriate, threatening, offensive,
+or harmful.
+
+Community leaders have the right and responsibility to remove, edit, or reject
+comments, commits, code, wiki edits, issues, and other contributions that are
+not aligned to this Code of Conduct, and will communicate reasons for moderation
+decisions when appropriate.
+
+## Scope
+
+This Code of Conduct applies within all community spaces, and also applies when
+an individual is officially representing the community in public spaces.
+Examples of representing our community include using an official email address,
+posting via an official social media account, or acting as an appointed
+representative at an online or offline event.
+
+## Enforcement
+
+Instances of abusive, harassing, or otherwise unacceptable behavior may be
+reported to the community leaders responsible for enforcement at
+[mail@nlohmann.me](mailto:mail@nlohmann.me).
+All complaints will be reviewed and investigated promptly and fairly.
+
+All community leaders are obligated to respect the privacy and security of the
+reporter of any incident.
+
+## Enforcement Guidelines
+
+Community leaders will follow these Community Impact Guidelines in determining
+the consequences for any action they deem in violation of this Code of Conduct:
+
+### 1. Correction
+
+**Community Impact**: Use of inappropriate language or other behavior deemed
+unprofessional or unwelcome in the community.
+
+**Consequence**: A private, written warning from community leaders, providing
+clarity around the nature of the violation and an explanation of why the
+behavior was inappropriate. A public apology may be requested.
+
+### 2. Warning
+
+**Community Impact**: A violation through a single incident or series of
+actions.
+
+**Consequence**: A warning with consequences for continued behavior. No
+interaction with the people involved, including unsolicited interaction with
+those enforcing the Code of Conduct, for a specified period of time. This
+includes avoiding interactions in community spaces as well as external channels
+like social media. Violating these terms may lead to a temporary or permanent
+ban.
+
+### 3. Temporary Ban
+
+**Community Impact**: A serious violation of community standards, including
+sustained inappropriate behavior.
+
+**Consequence**: A temporary ban from any sort of interaction or public
+communication with the community for a specified period of time. No public or
+private interaction with the people involved, including unsolicited interaction
+with those enforcing the Code of Conduct, is allowed during this period.
+Violating these terms may lead to a permanent ban.
+
+### 4. Permanent Ban
+
+**Community Impact**: Demonstrating a pattern of violation of community
+standards, including sustained inappropriate behavior, harassment of an
+individual, or aggression toward or disparagement of classes of individuals.
+
+**Consequence**: A permanent ban from any sort of public interaction within the
+community.
+
+## Attribution
+
+This Code of Conduct is adapted from the [Contributor Covenant][homepage],
+version 2.1, available at
+[https://www.contributor-covenant.org/version/2/1/code_of_conduct.html][v2.1].
+
+Community Impact Guidelines were inspired by
+[Mozilla's code of conduct enforcement ladder][Mozilla CoC].
+
+For answers to common questions about this code of conduct, see the FAQ at
+[https://www.contributor-covenant.org/faq][FAQ]. Translations are available at
+[https://www.contributor-covenant.org/translations][translations].
+
+[homepage]: https://www.contributor-covenant.org
+[v2.1]: https://www.contributor-covenant.org/version/2/1/code_of_conduct.html
+[Mozilla CoC]: https://github.com/mozilla/diversity
+[FAQ]: https://www.contributor-covenant.org/faq
+[translations]: https://www.contributor-covenant.org/translations

.github/CONTRIBUTING.md

@@ -1,71 +1,222 @@
-[![Issue Stats](http://issuestats.com/github/nlohmann/json/badge/pr?style=flat)](http://issuestats.com/github/nlohmann/json) [![Issue Stats](http://issuestats.com/github/nlohmann/json/badge/issue?style=flat)](http://issuestats.com/github/nlohmann/json)
+# Contribution Guidelines
 
-# How to contribute
+Thank you for your interest in contributing to this project! What began as an exercise to explore the exciting features
+of C++11 has evolved into a [widely-used](https://json.nlohmann.me/home/customers/) JSON library. I truly appreciate all
+the contributions from the community, whether it's proposing features, identifying bugs, or fixing mistakes! To ensure
+that our collaboration is efficient and effective, please follow these guidelines.
 
-This project started as a little excuse to exercise some of the cool new C++11 features. Over time, people actually started to use the JSON library (yey!) and started to help improve it by proposing features, finding bugs, or even fixing my mistakes. I am really [thankful](https://github.com/nlohmann/json/blob/master/README.md#thanks) for this and try to keep track of all the helpers.
+Feel free to discuss or suggest improvements to this document
+[by submitting a pull request](https://github.com/nlohmann/json/edit/develop/.github/CONTRIBUTING.md).
 
-To make it as easy as possible for you to contribute and for me to keep an overview, here are a few guidelines which should help us avoid all kinds of unnecessary work or disappointment. And of course, this document is subject to discussion, so please [create an issue](https://github.com/nlohmann/json/issues/new/choose) or a pull request if you find a way to improve it!
+## Ways to Contribute
 
-## Private reports
+There are multiple ways to contribute.
 
-Usually, all issues are tracked publicly on [GitHub](https://github.com/nlohmann/json/issues). If you want to make a private report (e.g., for a vulnerability or to attach an example that is not meant to be published), please send an email to <mail@nlohmann.me>.
+### Reporting an issue
 
-## Prerequisites
-
-Please [create an issue](https://github.com/nlohmann/json/issues/new/choose), assuming one does not already exist, and describe your concern. Note you need a [GitHub account](https://github.com/signup/free) for this.
-
-## Describe your issue
+Please [create an issue](https://github.com/nlohmann/json/issues/new/choose), assuming one does not already exist, and
+describe your concern. Note you need a [GitHub account](https://github.com/signup/free) for this.
 
 Clearly describe the issue:
 
-- If it is a bug, please describe how to **reproduce** it. If possible, attach a complete example which demonstrates the error. Please also state what you **expected** to happen instead of the error.
-- If you propose a change or addition, try to give an **example** how the improved code could look like or how to use it.
-- If you found a compilation error, please tell us which **compiler** (version and operating system) you used and paste the (relevant part of) the error messages to the ticket.
+- If it is a bug, please describe how to **reproduce** it. If possible, attach a _complete example_ which demonstrates
+  the error. Please also state what you **expected** to happen instead of the error.
+- If you propose a change or addition, try to give an **example** how the improved code could look like or how to use
+  it.
+- If you found a compilation error, please tell us which **compiler** (version and operating system) you used and paste
+  the (relevant part of) the error messages to the ticket.
 
-Please stick to the provided issue templates ([bug report](https://github.com/nlohmann/json/blob/develop/.github/ISSUE_TEMPLATE/Bug_report.md), [feature request](https://github.com/nlohmann/json/blob/develop/.github/ISSUE_TEMPLATE/Feature_request.md), or [question](https://github.com/nlohmann/json/blob/develop/.github/ISSUE_TEMPLATE/question.md)) if possible.
+Please stick to the provided issue template
+[bug report](https://github.com/nlohmann/json/blob/develop/.github/ISSUE_TEMPLATE/bug.yaml) if possible.
 
-## Files to change
+### Reporting a security vulnerability
 
-:exclamation: Before you make any changes, note the single-header file [`single_include/nlohmann/json.hpp`](https://github.com/nlohmann/json/blob/develop/single_include/nlohmann/json.hpp) is **generated** from the source files in the [`include/nlohmann` directory](https://github.com/nlohmann/json/tree/develop/include/nlohmann). Please **do not** edit file `single_include/nlohmann/json.hpp` directly, but change the `include/nlohmann` sources and regenerate file `single_include/nlohmann/json.hpp` by executing `make amalgamate`.
+You can report a security vulnerability according to our
+[security policy](https://github.com/nlohmann/json/security/policy).
 
-To make changes, you need to edit the following files:
+### Discussing a new feature
 
-1. [`include/nlohmann/*`](https://github.com/nlohmann/json/tree/develop/include/nlohmann) - These files are the sources of the library. Before testing or creating a pull request, execute `make amalgamate` to regenerate `single_include/nlohmann/json.hpp`.
+For questions, feature or support requests, please
+[open a discussion](https://github.com/nlohmann/json/discussions/new). If you find a proposed answer satisfactory,
+please use the "Mark as answer" button to make it easier for readers to see what helped and for the community to filter
+for open questions.
 
-2. [`test/src/unit-*.cpp`](https://github.com/nlohmann/json/tree/develop/test/src) - These files contain the [doctest](https://github.com/onqtam/doctest) unit tests which currently cover [100 %](https://coveralls.io/github/nlohmann/json) of the library's code.
+### Proposing a fix or an improvement
 
-   If you add or change a feature, please also add a unit test to this file. The unit tests can be compiled and executed with
+Join an ongoing discussion or comment on an existing issue before starting to code. This can help to avoid duplicate
+efforts or other frustration during the later review.
 
-   ```sh
-   $ mkdir build
-   $ cd build
-   $ cmake ..
-   $ cmake --build .
-   $ ctest
-   ```
+Create a [pull request](https://github.com/nlohmann/json/pulls?q=sort%3Aupdated-desc+is%3Apr+is%3Aopen) against the
+`develop` branch and follow the pull request template. In particular,
 
-   The test cases are also executed with several different compilers on [Travis](https://travis-ci.org/nlohmann/json) once you open a pull request.
+- describe the changes in detail, both the what and why,
+- reference existing issues where applicable,
+- add tests to maintain 100% test coverage,
+- update the documentation as needed, and
+- ensure the source code is amalgamated.
 
+We describe all points in detail below.
 
-## Note
+All contributions (including pull requests) must agree to the
+[Developer Certificate of Origin (DCO) version 1.1](https://developercertificate.org). This is exactly the same one
+created and used by the Linux kernel developers and posted on http://developercertificate.org/. This is a developer's
+certification that he or she has the right to submit the patch for inclusion into the project.
 
-- If you open a pull request, the code will be automatically tested with [Valgrind](http://valgrind.org)'s Memcheck tool to detect memory leaks. Please be aware that the execution with Valgrind _may_ in rare cases yield different behavior than running the code directly. This can result in failing unit tests which run successfully without Valgrind.
-- There is a Makefile target `make pretty` which runs [Artistic Style](http://astyle.sourceforge.net) to fix indentation. If possible, run it before opening the pull request. Otherwise, we shall run it afterward.
+## How to...
 
-## Please don't
+### Describe your changes
 
-- The C++11 support varies between different **compilers** and versions. Please note the [list of supported compilers](https://github.com/nlohmann/json/blob/master/README.md#supported-compilers). Some compilers like GCC 4.7 (and earlier), Clang 3.3 (and earlier), or Microsoft Visual Studio 13.0 and earlier are known not to work due to missing or incomplete C++11 support. Please refrain from proposing changes that work around these compiler's limitations with `#ifdef`s or other means.
-- Specifically, I am aware of compilation problems with **Microsoft Visual Studio** (there even is an [issue label](https://github.com/nlohmann/json/issues?utf8=✓&q=label%3A%22visual+studio%22+) for these kind of bugs). I understand that even in 2016, complete C++11 support isn't there yet. But please also understand that I do not want to drop features or uglify the code just to make Microsoft's sub-standard compiler happy. The past has shown that there are ways to express the functionality such that the code compiles with the most recent MSVC - unfortunately, this is not the main objective of the project.
-- Please refrain from proposing changes that would **break [JSON](https://json.org) conformance**. If you propose a conformant extension of JSON to be supported by the library, please motivate this extension.
-  - We shall not extend the library to **support comments**. There is quite some [controversy](https://www.reddit.com/r/programming/comments/4v6chu/why_json_doesnt_support_comments_douglas_crockford/) around this topic, and there were quite some [issues](https://github.com/nlohmann/json/issues/376) on this. We believe that JSON is fine without comments.
-  - We do not preserve the **insertion order of object elements**. The [JSON standard](https://tools.ietf.org/html/rfc8259.html) defines objects as "an unordered collection of zero or more name/value pairs". To this end, this library does not preserve insertion order of name/value pairs. (In fact, keys will be traversed in alphabetical order as `std::map` with `std::less` is used by default.) Note this behavior conforms to the standard, and we shall not change it to any other order. If you do want to preserve the insertion order, you can specialize the object type with containers like [`tsl::ordered_map`](https://github.com/Tessil/ordered-map) or [`nlohmann::fifo_map`](https://github.com/nlohmann/fifo_map).
+This library is primarily maintained as a spare-time project. As such, I can not make any guarantee how quickly changes
+are merged and released. Therefore, it is very important to make the review as smooth as possible by explaining not only
+_what_ you changed, but _why_. This rationale can be very valuable down the road when improvements or bugs are discussed
+years later.
 
-- Please do not open pull requests that address **multiple issues**.
+### Reference existing issues
+
+[Link a pull request to an issue](https://docs.github.com/en/issues/tracking-your-work-with-issues/using-issues/linking-a-pull-request-to-an-issue)
+to clarify that a fix is forthcoming and which issue can be closed after merging. Only few cases (e.g., fixing typos)
+don’t require prior discussions.
+
+### Write tests
+
+The library has an extensive test suite that currently covers [100 %](https://coveralls.io/github/nlohmann/json) of the
+library's code. These test are crucial to maintain API stability and give future contributors confidence that they do
+not accidentally break things. As Titus Winters aptly put it:
+
+> If you liked it, you should have put a test on it.
+
+#### Run the tests
+
+First, ensure the test suite runs before making any changes:
+
+```sh
+$ cmake -S. -B build
+$ cmake --build build -j 10
+$ ctest --test-dir build -j 10
+```
+
+The test suite should report:
+
+```
+100% tests passed, 0 tests failed out of 98
+```
+
+#### Add tests
+
+The tests are located in [`tests/src/unit-*.cpp`](https://github.com/nlohmann/json/tree/develop/tests/src) and contain
+[doctest assertions](https://github.com/doctest/doctest/blob/master/doc/markdown/assertions.md) like `CHECK`. The tests
+are structured along the features of the library or the nature of the tests. Usually, it should be clear from the
+context which existing file needs to be extended, and only very few cases require creating new test files.
+
+When fixing a bug, edit `unit-regression2.cpp` and add a section referencing the fixed issue.
+
+#### Exceptions
+
+When you test exceptions, please use `CHECK_THROWS_WITH_AS` which also takes the `what()` argument of the thrown
+exception into account.
+
+#### Coverage
+
+If test coverage decreases, an automatic warning comment will be posted on the pull request. You can access a code
+coverage report as artifact to the “Ubuntu” workflow.
+
+### Update the documentation
+
+The [main documentation](https://json.nlohmann.me) of the library is generated from the files
+[`docs/mkdocs/docs`](https://github.com/nlohmann/json/blob/develop/docs/mkdocs/docs). This folder contains dedicated
+pages for [certain features](https://github.com/nlohmann/json/tree/develop/docs/mkdocs/docs/features), a list of
+[all exceptions](https://github.com/nlohmann/json/blob/develop/docs/mkdocs/docs/home/exceptions.md), and an
+[extensive API documentation](https://github.com/nlohmann/json/tree/develop/docs/mkdocs/docs/api) with details on every
+public API function.
+
+Build the documentation locally using:
+
+```shell
+make install_venv -C docs/mkdocs
+make serve -C docs/mkdocs
+```
+
+The documentation will then available at <http://127.0.0.1:8000/>. See the documentation of
+[mkdocs](https://www.mkdocs.org) and [Material for MkDocs](https://squidfunk.github.io/mkdocs-material/) for more
+information.
+
+### Amalgamate the source code
+
+The single-header files
+[`single_include/nlohmann/json.hpp`](https://github.com/nlohmann/json/blob/develop/single_include/nlohmann/json.hpp) and
+[`single_include/nlohmann/json_fwd.hpp`](https://github.com/nlohmann/json/blob/develop/single_include/nlohmann/json_fwd.hpp)
+are **generated** from the source files in the
+[`include/nlohmann` directory](https://github.com/nlohmann/json/tree/develop/include/nlohmann). **Do not** edit the
+files directly; instead, modify the include/nlohmann sources and regenerate the files by executing:
+
+```shell
+make amalgamate
+```
+
+## Recommended documentation
+
+- The library’s [README file](https://github.com/nlohmann/json/blob/master/README.md) is an excellent starting point to
+  understand its functionality.
+- The [documentation page](https://json.nlohmann.me) is the reference documentation of the library.
+- [RFC 8259](https://datatracker.ietf.org/doc/html/rfc8259) is the reference for the JavaScript Object Notation (JSON)
+  Data Interchange Format.
+
+## Please don't...
+
+Certain contributions are not helpful.
+
+### Break the public API
+
+We take pride in the library being used by
+[numerous customers across various industries](https://json.nlohmann.me/home/customers/). They all rely on the
+guarantees provided by [semantic versioning](https://semver.org). Please do not change the library such that the public
+API of the 3.x.y version is broken. This includes:
+
+- Changing function signatures (altering parameter types, return types, number of parameters) or changing the const-ness
+  of member functions.
+- Removing functions.
+- Renaming functions or classes.
+- Changing exception handling.
+- Changing exception ids.
+- Changing access specifiers.
+- Changing default arguments.
+
+Although these guidelines may seem restrictive, they are essential for maintaining the library’s utility.
+
+Breaking changes may be introduced when they are guarded with a feature macro such as
+[`JSON_USE_IMPLICIT_CONVERSIONS`](https://json.nlohmann.me/api/macros/json_use_implicit_conversions/) which allows to
+selectively change the behavior of the library. In next steps, the current behavior can then be deprecated. Using
+feature macros then allows users to test their code against the library in the next major release.
+
+### Break C++11 language conformance
+
+This library is designed to work with C++11 and later. This means that any
+[supported C++11 compiler](https://github.com/nlohmann/json/blob/master/README.md#supported-compilers) should compile
+the library without problems. Some compilers like GCC 4.7 (and earlier), Clang 3.3 (and earlier), or Microsoft Visual
+Studio 13.0 and earlier are known not to work due to missing or incomplete C++11 support.
+
+Please do not add features that do not work with the mentioned supported compilers. Please guard features from C++14 and
+later against the respective [`JSON_HAS_CPP_14`](https://json.nlohmann.me/api/macros/json_has_cpp_11/) macros.
+
+### Break JSON conformance
+
+Please refrain from proposing changes that would **break [JSON](https://datatracker.ietf.org/doc/html/rfc8259)
+conformance**. If you propose a conformant extension of JSON to be supported by the library, please motivate this
+extension.
 
 ## Wanted
 
-The following areas really need contribution:
+The following areas really need contribution and are always welcomed:
 
-- Extending the **continuous integration** toward more exotic compilers such as Android NDK, Intel's Compiler, or the bleeding-edge versions Clang.
-- Improving the efficiency of the **JSON parser**. The current parser is implemented as a naive recursive descent parser with hand coded string handling. More sophisticated approaches like LALR parsers would be really appreciated. That said, parser generators like Bison or ANTLR do not play nice with single-header files -- I really would like to keep the parser inside the `json.hpp` header, and I am not aware of approaches similar to [`re2c`](http://re2c.org) for parsing.
-- Extending and updating existing **benchmarks** to include (the most recent version of) this library. Though efficiency is not everything, speed and memory consumption are very important characteristics for C++ developers, so having proper comparisons would be interesting.
+- Extending the **continuous integration** toward more exotic compilers such as Android NDK, Intel's Compiler, or the
+  bleeding-edge versions Clang.
+- Improving the efficiency of the **JSON parser**. The current parser is implemented as a naive recursive descent parser
+  with hand coded string handling. More sophisticated approaches like LALR parsers would be really appreciated. That
+  said, parser generators like Bison or ANTLR do not play nice with single-header files -- I really would like to keep
+  the parser inside the `json.hpp` header, and I am not aware of approaches similar to [`re2c`](http://re2c.org) for
+  parsing.
+- Extending and updating existing **benchmarks** to include (the most recent version of) this library. Though efficiency
+  is not everything, speed and memory consumption are very important characteristics for C++ developers, so having
+  proper comparisons would be interesting.
+
+We look forward to your contributions and collaboration to enhance the library!

.github/FUNDING.yml

@@ -1,2 +1,2 @@
 github: nlohmann
-custom: http://paypal.me/nlohmann
+custom: https://paypal.me/nlohmann

.github/ISSUE_TEMPLATE/Bug_report.md

@@ -1,57 +0,0 @@
----
-name: Bug report
-about: Create a report to help us improve
-title: ''
-labels: 'kind: bug'
-assignees: ''
-
----
-
-<!-- Provide a concise summary of the issue in the title above. -->
-
-#### What is the issue you have?
-
-<!-- Provide a detailed introduction to the issue itself, and why you consider it to be a bug. -->
-<!-- If possible, be specific and add stack traces, error messages, etc. Avoid vague terms like "crash" or "doesn't work". -->
-
-#### Please describe the steps to reproduce the issue.
-
-<!-- Provide a link to a live example, or an unambiguous set of steps to -->
-<!-- reproduce this bug. Include code to reproduce, if relevant -->
-
-1.
-2.
-3.
-
-#### Can you provide a small but working code example?
-
-<!-- Please understand that we cannot analyze and debug large code bases. -->
-
-#### What is the expected behavior?
-
-<!-- Tell us what should happen -->
-
-#### And what is the actual behavior instead?
-
-<!-- Tell us what happens instead. -->
-
-#### Which compiler and operating system are you using?
-
-<!-- Include as many relevant details about the environment you experienced the bug in. -->
-<!-- Make sure you use a supported compiler, see https://github.com/nlohmann/json#supported-compilers. -->
-
-- Compiler: ___
-- Operating system: ___
-
-#### Which version of the library did you use?
-
-<!-- Please add an `x` to the respective line. -->
-
-- [ ] latest release version 3.10.4
-- [ ] other release - please state the version: ___
-- [ ] the `develop` branch
-
-#### If you experience a compilation error: can you [compile and run the unit tests](https://github.com/nlohmann/json#execute-unit-tests)?
-
-- [ ] yes
-- [ ] no - please copy/paste the error message below

.github/ISSUE_TEMPLATE/bug.yaml

@@ -0,0 +1,93 @@
+name: Bug Report
+description: Create a bug report
+labels:
+  - 'kind: bug'
+body:
+  - type: markdown
+    attributes:
+      value: >
+        Thanks for taking the time to fill out this bug report!
+        
+        Make sure you give it a short and specific **title** so that the report
+        is searchable and uniquely identifiable.
+        
+        Note that this form is for bug reports only. Please
+        [open a discussion](https://github.com/nlohmann/json/discussions/new)
+        for questions, feature requests, or support requests.
+  - type: textarea
+    id: summary
+    attributes:
+      label: Description
+      description: >
+        Please provide an abstract description of the issue to the developers,
+        and why you consider it to be a bug. Please include any specific links
+        to the documentation, JSON specification, or code.
+    validations:
+      required: true
+  - type: textarea
+    id: reproduce
+    attributes:
+      label: Reproduction steps
+      description: >
+        How do you trigger the bug? Please walk us through step by step. Be as
+        specific as possible.
+    validations:
+      required: true
+  - type: textarea
+    id: results
+    attributes:
+      label: Expected vs. actual results
+      description: >
+        Please describe what you expected to happen after the steps above and
+        what actually happened.
+    validations:
+      required: true
+  - type: textarea
+    id: code
+    attributes:
+      label: Minimal code example
+      description: >
+        If possible, provide a small and self-contained example that triggers
+        the bug. Please understand that we cannot analyze and debug large code
+        bases. Please do not paste screenshots here.
+      render: Shell
+  - type: textarea
+    id: output
+    attributes:
+      label: Error messages
+      description: >
+        Please provide any kind of error output (compilation errors, exception
+        messages, stack traces, etc.) which can help to diagnose the error.
+      render: Shell
+  - type: input
+    id: compiler
+    attributes:
+      label: Compiler and operating system
+      description: >
+        On which operating systems and compilers have you observed the issue?
+        Include as many relevant details about the environment you experienced
+        the bug in. Make sure you use a
+        [supported compiler](https://github.com/nlohmann/json#supported-compilers).
+    validations:
+      required: true
+  - type: input
+    id: version
+    attributes:
+      label: Library version
+      description: >
+        Which version of the library did you use? If it is a released version,
+        please enter the version number (e.g., 3.11.3). Otherwise, please enter
+        the commit hash. If you got the library from another source as the
+        GitHub repository (e.g., via a package manager), please also state
+        this.
+    validations:
+      required: true
+  - type: checkboxes
+    id: validation
+    attributes:
+      label: Validation
+      description: >
+        Please check these additional steps:
+      options:
+        - label: The bug also occurs if the latest version from the [`develop`](https://github.com/nlohmann/json/tree/develop) branch is used.
+        - label: I can successfully [compile and run the unit tests](https://github.com/nlohmann/json#execute-unit-tests).

.github/PULL_REQUEST_TEMPLATE.md

@@ -1,19 +1,9 @@
 [Describe your pull request here. Please read the text below the line, and make sure you follow the checklist.]
 
-* * *
-
-## Pull request checklist
+- [ ] The changes are described in detail, both the what and why.
+- [ ] If applicable, an [existing issue](https://github.com/nlohmann/json/issues) is referenced.
+- [ ] The [Code coverage](https://coveralls.io/github/nlohmann/json) remained at 100%. A test case for every new line of code.
+- [ ] If applicable, the [documentation](https://json.nlohmann.me) is updated.
+- [ ] The source code is amalgamated by running `make amalgamate`.
 
 Read the [Contribution Guidelines](https://github.com/nlohmann/json/blob/develop/.github/CONTRIBUTING.md) for detailed information.
-
-- [ ]  Changes are described in the pull request, or an [existing issue is referenced](https://github.com/nlohmann/json/issues).
-- [ ]  The test suite [compiles and runs](https://github.com/nlohmann/json/blob/develop/README.md#execute-unit-tests) without error.
-- [ ]  [Code coverage](https://coveralls.io/github/nlohmann/json) is 100%. Test cases can be added by editing the [test suite](https://github.com/nlohmann/json/tree/develop/test/src).
-- [ ]  The source code is amalgamated; that is, after making changes to the sources in the `include/nlohmann` directory, run `make amalgamate` to create the single-header file `single_include/nlohmann/json.hpp`. The whole process is described [here](https://github.com/nlohmann/json/blob/develop/.github/CONTRIBUTING.md#files-to-change).
-
-## Please don't
-
-- The C++11 support varies between different **compilers** and versions. Please note the [list of supported compilers](https://github.com/nlohmann/json/blob/master/README.md#supported-compilers). Some compilers like GCC 4.7 (and earlier), Clang 3.3 (and earlier), or Microsoft Visual Studio 13.0 and earlier are known not to work due to missing or incomplete C++11 support. Please refrain from proposing changes that work around these compiler's limitations with `#ifdef`s or other means.
-- Specifically, I am aware of compilation problems with **Microsoft Visual Studio** (there even is an [issue label](https://github.com/nlohmann/json/issues?utf8=✓&q=label%3A%22visual+studio%22+) for these kind of bugs). I understand that even in 2016, complete C++11 support isn't there yet. But please also understand that I do not want to drop features or uglify the code just to make Microsoft's sub-standard compiler happy. The past has shown that there are ways to express the functionality such that the code compiles with the most recent MSVC - unfortunately, this is not the main objective of the project.
-- Please refrain from proposing changes that would **break [JSON](https://json.org) conformance**. If you propose a conformant extension of JSON to be supported by the library, please motivate this extension.
-- Please do not open pull requests that address **multiple issues**.

.github/SECURITY.md

@@ -2,4 +2,24 @@
 
 ## Reporting a Vulnerability
 
-Usually, all issues are tracked publicly on [GitHub](https://github.com/nlohmann/json/issues). If you want to make a private report (e.g., for a vulnerability or to attach an example that is not meant to be published), please send an email to <mail@nlohmann.me>. You can use [this key](https://keybase.io/nlohmann/pgp_keys.asc?fingerprint=797167ae41c0a6d9232e48457f3cea63ae251b69) for encryption.
+We value the security of our users and appreciate your efforts to responsibly disclose vulnerabilities. If you have
+identified a security vulnerability in this repository, please use the GitHub Security Advisory
+["Report a Vulnerability"](https://github.com/nlohmann/json/security/advisories/new) tab.
+
+Until it is published, this draft security advisory will only be visible to the maintainers of this project. Other
+users and teams may be added once the advisory is created.
+
+We will send a response indicating the next steps in handling your report. After the initial reply to your report, we
+will keep you informed of the progress towards a fix and full announcement and may ask for additional information or
+guidance.
+
+For vulnerabilities in third-party dependencies or modules, please report them directly to the respective maintainers.
+
+## Additional Resources
+
+- Explore security-related topics and contribute to tools and projects through
+  [GitHub Security Lab](https://securitylab.github.com/).
+- Learn more about responsible disclosure and reporting vulnerabilities in GitHub at
+  [About coordinated disclosure of security vulnerabilities](https://docs.github.com/en/code-security/repository-security-advisories/about-coordinated-disclosure-of-security-vulnerabilities).
+
+We sincerely thank you for contributing to the security and integrity of this project!

.github/config.yml

@@ -6,7 +6,7 @@ sentimentBotToxicityThreshold: .7
 
 # *Required* Comment to reply with
 sentimentBotReplyComment: >
-  Please be sure to review the [code of conduct](https://github.com/nlohmann/json/blob/develop/CODE_OF_CONDUCT.md) and be respectful of other users. cc/ @nlohmann
+  Please be sure to review the [code of conduct](https://github.com/nlohmann/json/blob/develop/.github/CODE_OF_CONDUCT.md) and be respectful of other users. cc/ @nlohmann
 
 
 # Configuration for request-info - https://github.com/behaviorbot/request-info
@@ -17,3 +17,6 @@ requestInfoReplyComment: >
 
 # *OPTIONAL* Label to be added to Issues and Pull Requests with insufficient information given
 requestInfoLabelToAdd: "state: needs more info"
+
+checkIssueTemplate: true
+checkPullRequestTemplate: true

.github/dependabot.yml

@@ -0,0 +1,31 @@
+version: 2
+updates:
+  - package-ecosystem: github-actions
+    directory: /
+    schedule:
+      interval: daily
+
+  - package-ecosystem: pip
+    directory: /docs/mkdocs
+    schedule:
+      interval: daily
+
+  - package-ecosystem: pip
+    directory: /tools/astyle
+    schedule:
+      interval: daily
+
+  - package-ecosystem: pip
+    directory: /tools/generate_natvis
+    schedule:
+      interval: daily
+
+  - package-ecosystem: pip
+    directory: /tools/serve_header
+    schedule:
+      interval: daily
+
+  - package-ecosystem: pip
+    directory: /cmake/requirements
+    schedule:
+      interval: daily

.github/external_ci/appveyor.yml

@@ -1,5 +1,19 @@
 version: '{build}'
 
+# only build PRs and commits to develop branch
+# (see https://help.appveyor.com/discussions/questions/55079-two-builds-per-commit-to-pull-request)
+branches:
+  only:
+    - develop
+
+only_commits:
+  files:
+    - .github/external_ci/appveyor.yml
+    - cmake/
+    - include/
+    - tests/
+    - CMakeLists.txt
+
 environment:
   matrix:
     - APPVEYOR_BUILD_WORKER_IMAGE: Visual Studio 2015
@@ -66,18 +80,12 @@ before_build:
   - cmake . -G "%GENERATOR%" -A "%GENERATOR_PLATFORM%" -DCMAKE_CXX_FLAGS="%CXX_FLAGS%" -DCMAKE_IGNORE_PATH="C:/Program Files/Git/usr/bin" -DJSON_BuildTests=On "%CMAKE_OPTIONS%"
 
 build_script:
-  - cmake --build . --config "%configuration%"
+  - cmake --build . --config "%configuration%" --parallel 2
 
 test_script:
-  - if "%configuration%"=="Release" ctest -C "%configuration%" -V -j
+  - if "%configuration%"=="Release" ctest -C "%configuration%" --parallel 2 --output-on-failure
   # On Debug builds, skip test-unicode_all
   # as it is extremely slow to run and cause
   # occasional timeouts on AppVeyor.
   # More info: https://github.com/nlohmann/json/pull/1570
-  - if "%configuration%"=="Debug" ctest --exclude-regex "test-unicode" -C "%configuration%" -V -j
-
-# only build PRs and commits to develop branch
-# (see https://help.appveyor.com/discussions/questions/55079-two-builds-per-commit-to-pull-request)
-branches:
-  only:
-    - develop
+  - if "%configuration%"=="Debug" ctest --exclude-regex "test-unicode" -C "%configuration%" --parallel 2 --output-on-failure

.github/labeler.yml

@@ -0,0 +1,38 @@
+version: 1
+
+labels:
+- label: "documentation"
+  files:
+    - "README.md"
+
+- label: "documentation"
+  files:
+    - "docs/.*"
+
+- label: "tests"
+  files:
+    - "tests/.*"
+
+- label: "CMake"
+  files:
+    - ".*CMakeLists.txt"
+
+- label: "CMake"
+  files:
+    - "cmake/.*"
+
+- label: "CI"
+  files:
+    - "github/workflows/.*"
+
+- label: "CI"
+  files:
+    - "github/external_ci/.*"
+
+- label: "S"
+  size-below: 10
+- label: "M"
+  size-above: 9
+  size-below: 100
+- label: "L"
+  size-above: 100

.github/stale.yml

@@ -1,17 +0,0 @@
-# Number of days of inactivity before an issue becomes stale
-daysUntilStale: 30
-# Number of days of inactivity before a stale issue is closed
-daysUntilClose: 7
-# Issues with these labels will never be considered stale
-exemptLabels:
-  - pinned
-  - security
-# Label to use when marking an issue as stale
-staleLabel: "state: stale"
-# Comment to post when marking an issue as stale. Set to `false` to disable
-markComment: >
-  This issue has been automatically marked as stale because it has not had
-  recent activity. It will be closed if no further activity occurs. Thank you
-  for your contributions.
-# Comment to post when closing a stale issue. Set to `false` to disable
-closeComment: false

.github/workflows/check_amalgamation.yml

@@ -0,0 +1,76 @@
+name: "Check amalgamation"
+
+on:
+  pull_request:
+
+permissions:
+  contents: read
+
+jobs:
+  save:
+    runs-on: ubuntu-latest
+    steps:
+      - name: Harden Runner
+        uses: step-security/harden-runner@4d991eb9b905ef189e4c376166672c3f2f230481 # v2.11.0
+        with:
+          egress-policy: audit
+
+      - name: Save PR number
+        run: |
+          mkdir -p ./pr
+          echo ${{ github.event.number }} > ./pr/number
+          echo ${{ github.event.pull_request.user.login }} > ./pr/author
+      - uses: actions/upload-artifact@4cec3d8aa04e39d1a68397de0c4cd6fb9dce8ec1 # v4.6.1
+        with:
+          name: pr
+          path: pr/
+
+  check:
+    runs-on: ubuntu-latest
+    env:
+      MAIN_DIR: ${{ github.workspace }}/main
+      INCLUDE_DIR: ${{ github.workspace }}/main/single_include/nlohmann
+      TOOL_DIR: ${{ github.workspace }}/tools/tools/amalgamate
+
+    steps:
+      - name: Harden Runner
+        uses: step-security/harden-runner@4d991eb9b905ef189e4c376166672c3f2f230481 # v2.11.0
+        with:
+          egress-policy: audit
+
+      - name: Checkout pull request
+        uses: actions/checkout@11bd71901bbe5b1630ceea73d27597364c9af683 # v4.2.2
+        with:
+          path: main
+          ref: ${{ github.event.pull_request.head.sha }}
+
+      - name: Checkout tools
+        uses: actions/checkout@11bd71901bbe5b1630ceea73d27597364c9af683 # v4.2.2
+        with:
+          path: tools
+          ref: develop
+
+      - name: Install astyle
+        run: |
+          python3 -mvenv venv
+          venv/bin/pip3 install -r $MAIN_DIR/tools/astyle/requirements.txt
+
+      - name: Check amalgamation
+        run: |
+          cd $MAIN_DIR
+
+          rm -fr $INCLUDE_DIR/json.hpp~ $INCLUDE_DIR/json_fwd.hpp~
+          cp $INCLUDE_DIR/json.hpp $INCLUDE_DIR/json.hpp~
+          cp $INCLUDE_DIR/json_fwd.hpp $INCLUDE_DIR/json_fwd.hpp~
+
+          python3 $TOOL_DIR/amalgamate.py -c $TOOL_DIR/config_json.json -s .
+          python3 $TOOL_DIR/amalgamate.py -c $TOOL_DIR/config_json_fwd.json -s .
+          echo "Format (1)"
+          ${{ github.workspace }}/venv/bin/astyle --project=tools/astyle/.astylerc --suffix=none --quiet $INCLUDE_DIR/json.hpp $INCLUDE_DIR/json_fwd.hpp
+
+          diff $INCLUDE_DIR/json.hpp~ $INCLUDE_DIR/json.hpp
+          diff $INCLUDE_DIR/json_fwd.hpp~ $INCLUDE_DIR/json_fwd.hpp
+
+          ${{ github.workspace }}/venv/bin/astyle --project=tools/astyle/.astylerc --suffix=orig $(find docs/examples include tests -type f \( -name '*.hpp' -o -name '*.cpp' -o -name '*.cu' \) -not -path 'tests/thirdparty/*' -not -path 'tests/abi/include/nlohmann/*' | sort)
+          echo Check
+          find $MAIN_DIR -name '*.orig' -exec false {} \+

.github/workflows/cifuzz.yml

@@ -0,0 +1,35 @@
+name: CIFuzz
+on: [pull_request]
+
+permissions:
+  contents: read
+
+jobs:
+  Fuzzing:
+    runs-on: ubuntu-latest
+    steps:
+    - name: Harden Runner
+      uses: step-security/harden-runner@4d991eb9b905ef189e4c376166672c3f2f230481 # v2.11.0
+      with:
+        egress-policy: audit
+
+    - name: Build Fuzzers
+      id: build
+      uses: google/oss-fuzz/infra/cifuzz/actions/build_fuzzers@57fe4475324c5506adbfecdcdd2917f65c86ee9e # master
+      with:
+        oss-fuzz-project-name: 'json'
+        dry-run: false
+        language: c++
+    - name: Run Fuzzers
+      uses: google/oss-fuzz/infra/cifuzz/actions/run_fuzzers@57fe4475324c5506adbfecdcdd2917f65c86ee9e # master
+      with:
+        oss-fuzz-project-name: 'json'
+        fuzz-seconds: 300
+        dry-run: false
+        language: c++
+    - name: Upload Crash
+      uses: actions/upload-artifact@4cec3d8aa04e39d1a68397de0c4cd6fb9dce8ec1 # v4.6.1
+      if: failure() && steps.build.outcome == 'success'
+      with:
+        name: artifacts
+        path: ./out/artifacts

.github/workflows/codeql-analysis.yml

@@ -9,47 +9,41 @@ on:
   pull_request:
   schedule:
     - cron: '0 19 * * 1'
+  workflow_dispatch:
+  
+concurrency:
+  group: ${{ github.workflow }}-${{ github.ref || github.run_id }}
+  cancel-in-progress: true
+
+permissions:
+  contents: read
 
 jobs:
   CodeQL-Build:
 
     runs-on: ubuntu-latest
+    permissions:
+      security-events: write
 
     steps:
-    - name: Checkout repository
-      uses: actions/checkout@v2
+    - name: Harden Runner
+      uses: step-security/harden-runner@4d991eb9b905ef189e4c376166672c3f2f230481 # v2.11.0
       with:
-        # We must fetch at least the immediate parents so that if this is
-        # a pull request then we can checkout the head.
-        fetch-depth: 2
+        egress-policy: audit
 
-    # If this run was triggered by a pull request event, then checkout
-    # the head of the pull request instead of the merge commit.
-    - run: git checkout HEAD^2
-      if: ${{ github.event_name == 'pull_request' }}
+    - name: Checkout repository
+      uses: actions/checkout@11bd71901bbe5b1630ceea73d27597364c9af683 # v4.2.2
 
     # Initializes the CodeQL tools for scanning.
     - name: Initialize CodeQL
-      uses: github/codeql-action/init@v1
-      # Override language selection by uncommenting this and choosing your languages
-      # with:
-      #   languages: go, javascript, csharp, python, cpp, java
+      uses: github/codeql-action/init@b56ba49b26e50535fa1e7f7db0f4f7b4bf65d80d # v3.28.10
+      with:
+        languages: c-cpp
 
     # Autobuild attempts to build any compiled languages  (C/C++, C#, or Java).
     # If this step fails, then you should remove it and run the build manually (see below)
     - name: Autobuild
-      uses: github/codeql-action/autobuild@v1
-
-    # ℹ️ Command-line programs to run using the OS shell.
-    # 📚 https://git.io/JvXDl
-
-    # ✏️ If the Autobuild fails above, remove it and uncomment the following three lines
-    #    and modify them (or add more) to build your code if your project
-    #    uses a compiled language
-
-    #- run: |
-    #   make bootstrap
-    #   make release
+      uses: github/codeql-action/autobuild@b56ba49b26e50535fa1e7f7db0f4f7b4bf65d80d # v3.28.10
 
     - name: Perform CodeQL Analysis
-      uses: github/codeql-action/analyze@v1
+      uses: github/codeql-action/analyze@b56ba49b26e50535fa1e7f7db0f4f7b4bf65d80d # v3.28.10

.github/workflows/comment_check_amalgamation.yml

@@ -0,0 +1,81 @@
+name: Comment Check Amalgamation
+on:
+  workflow_run:
+    workflows: ["Check amalgamation"]
+    types:
+      - completed
+
+permissions:
+  contents: read
+
+jobs:
+  comment:
+    if: ${{ github.event.workflow_run.conclusion == 'failure' }}
+    runs-on: ubuntu-latest
+    permissions:
+      contents: read
+      actions: read
+      issues: read
+      pull-requests: write
+    steps:
+      - name: Harden Runner
+        uses: step-security/harden-runner@4d991eb9b905ef189e4c376166672c3f2f230481 # v2.11.0
+        with:
+          egress-policy: audit
+
+      - name: 'Download artifact'
+        uses: actions/github-script@60a0d83039c74a4aee543508d2ffcb1c3799cdea # v7.0.1
+        with:
+          script: |
+            var artifacts = await github.rest.actions.listWorkflowRunArtifacts({
+               owner: context.repo.owner,
+               repo: context.repo.repo,
+               run_id: ${{github.event.workflow_run.id }},
+            });
+            var matchArtifact = artifacts.data.artifacts.filter((artifact) => {
+              return artifact.name == "pr"
+            })[0];
+            var download = await github.rest.actions.downloadArtifact({
+               owner: context.repo.owner,
+               repo: context.repo.repo,
+               artifact_id: matchArtifact.id,
+               archive_format: 'zip',
+            });
+            var fs = require('fs');
+            fs.writeFileSync('${{github.workspace}}/pr.zip', Buffer.from(download.data));
+      - run: unzip pr.zip
+
+      - name: 'Comment on PR'
+        uses: actions/github-script@60a0d83039c74a4aee543508d2ffcb1c3799cdea # v7.0.1
+        with:
+          github-token: ${{ secrets.GITHUB_TOKEN }}
+          script: |
+            var fs = require('fs');
+            const author = fs.readFileSync('./author')
+            const issue_number = Number(fs.readFileSync('./number'));
+            const opts = github.rest.issues.listForRepo.endpoint.merge({
+              owner: context.repo.owner,
+              repo: context.repo.repo,
+              creator: author,
+              state: 'all'
+            })
+            let first = true
+            const issues = await github.paginate(opts)
+            for (const issue of issues) {
+              if (issue.number === issue_number) {
+                continue
+              }
+              if (issue.pull_request) {
+                first = false
+                break
+              }
+            }
+            await github.rest.issues.createComment({
+              issue_number: issue_number,
+              owner: context.repo.owner,
+              repo: context.repo.repo,
+              body: '## 🔴 Amalgamation check failed! 🔴\nThe source code has not been amalgamated.'
+                    + (first ? ' @' + author + ' Please read and follow the [Contribution Guidelines]'
+                               + '(https://github.com/nlohmann/json/blob/develop/.github/CONTRIBUTING.md#files-to-change).'
+                             : '')
+              })

.github/workflows/dependency-review.yml

@@ -0,0 +1,27 @@
+# Dependency Review Action
+#
+# This Action will scan dependency manifest files that change as part of a Pull Request,
+# surfacing known-vulnerable versions of the packages declared or updated in the PR.
+# Once installed, if the workflow run is marked as required,
+# PRs introducing known-vulnerable packages will be blocked from merging.
+#
+# Source repository: https://github.com/actions/dependency-review-action
+name: 'Dependency Review'
+on: [pull_request]
+
+permissions:
+  contents: read
+
+jobs:
+  dependency-review:
+    runs-on: ubuntu-latest
+    steps:
+      - name: Harden Runner
+        uses: step-security/harden-runner@4d991eb9b905ef189e4c376166672c3f2f230481 # v2.11.0
+        with:
+          egress-policy: audit
+
+      - name: 'Checkout Repository'
+        uses: actions/checkout@11bd71901bbe5b1630ceea73d27597364c9af683 # v4.2.2
+      - name: 'Dependency Review'
+        uses: actions/dependency-review-action@3b139cfc5fae8b618d3eae3675e383bb1769c019 # v4.5.0

.github/workflows/labeler.yml

@@ -0,0 +1,26 @@
+name: "Pull Request Labeler"
+
+on:
+  pull_request_target:
+    types: [opened, synchronize]
+
+permissions:
+  contents: read
+
+jobs:
+  label:
+    permissions:
+      contents: read
+      pull-requests: write
+
+    runs-on: ubuntu-latest
+
+    steps:
+      - name: Harden Runner
+        uses: step-security/harden-runner@4d991eb9b905ef189e4c376166672c3f2f230481 # v2.11.0
+        with:
+          egress-policy: audit
+
+      - uses: srvaroa/labeler@e216fb40e2e6d3b17d90fb1d950f98bee92f65ce # master
+        env:
+          GITHUB_TOKEN: "${{ secrets.GITHUB_TOKEN }}"

.github/workflows/macos.yml

@@ -7,38 +7,114 @@ on:
       - master
       - release/*
   pull_request:
+  workflow_dispatch:
+
+concurrency:
+  group: ${{ github.workflow }}-${{ github.ref || github.run_id }}
+  cancel-in-progress: true
+
+permissions:
+  contents: read
 
 jobs:
-  xcode:
-    runs-on: macos-10.15
+# macos-11 is deprecated
+#  macos-11:
+#    runs-on: macos-11
+#    strategy:
+#      matrix:
+#        xcode: ['11.7', '12.4', '12.5.1', '13.0']
+#    env:
+#      DEVELOPER_DIR: /Applications/Xcode_${{ matrix.xcode }}.app/Contents/Developer
+#
+#    steps:
+#      - uses: actions/checkout@11bd71901bbe5b1630ceea73d27597364c9af683 # v4.2.2
+#      - name: Run CMake
+#        run: cmake -S . -B build -D CMAKE_BUILD_TYPE=Debug -DJSON_BuildTests=On -DJSON_FastTests=ON
+#      - name: Build
+#        run: cmake --build build --parallel 10
+#      - name: Test
+#        run: cd build ; ctest -j 10 --output-on-failure
+
+# macos-12 is deprecated (https://github.com/actions/runner-images/issues/10721)
+#  macos-12:
+#    runs-on: macos-12 # https://github.com/actions/runner-images/blob/main/images/macos/macos-12-Readme.md
+#    strategy:
+#      matrix:
+#        xcode: ['13.1', '13.2.1', '13.3.1', '13.4.1', '14.0', '14.0.1', '14.1']
+#    env:
+#      DEVELOPER_DIR: /Applications/Xcode_${{ matrix.xcode }}.app/Contents/Developer
+#
+#    steps:
+#      - uses: actions/checkout@11bd71901bbe5b1630ceea73d27597364c9af683 # v4.2.2
+#      - name: Run CMake
+#        run: cmake -S . -B build -D CMAKE_BUILD_TYPE=Debug -DJSON_BuildTests=On -DJSON_FastTests=ON
+#      - name: Build
+#        run: cmake --build build --parallel 10
+#      - name: Test
+#        run: cd build ; ctest -j 10 --output-on-failure
+
+  macos-13:
+    runs-on: macos-13 # https://github.com/actions/runner-images/blob/main/images/macos/macos-13-Readme.md
     strategy:
       matrix:
-        xcode: [12.4, 12.3, 12.2, 12.1.1, 12.1, 12, 11.7, 11.6, 11.5, 11.4.1, 11.3.1, 11.2.1, 10.3]
+        xcode: ['14.1', '14.2', '14.3', '14.3.1', '15.0.1', '15.1', '15.2']
     env:
       DEVELOPER_DIR: /Applications/Xcode_${{ matrix.xcode }}.app/Contents/Developer
 
     steps:
-      - uses: actions/checkout@v2
-      - name: cmake
+      - uses: actions/checkout@11bd71901bbe5b1630ceea73d27597364c9af683 # v4.2.2
+      - name: Run CMake
         run: cmake -S . -B build -D CMAKE_BUILD_TYPE=Debug -DJSON_BuildTests=On -DJSON_FastTests=ON
-      - name: build
+      - name: Build
         run: cmake --build build --parallel 10
-      - name: test
+      - name: Test
+        run: cd build ; ctest -j 10 --output-on-failure
+
+  macos-14:
+    runs-on: macos-14 # https://github.com/actions/runner-images/blob/main/images/macos/macos-14-Readme.md
+    strategy:
+      matrix:
+        xcode: ['15.3', '15.4']
+    env:
+      DEVELOPER_DIR: /Applications/Xcode_${{ matrix.xcode }}.app/Contents/Developer
+
+    steps:
+      - uses: actions/checkout@11bd71901bbe5b1630ceea73d27597364c9af683 # v4.2.2
+      - name: Run CMake
+        run: cmake -S . -B build -D CMAKE_BUILD_TYPE=Debug -DJSON_BuildTests=On -DJSON_FastTests=ON
+      - name: Build
+        run: cmake --build build --parallel 10
+      - name: Test
+        run: cd build ; ctest -j 10 --output-on-failure
+
+  macos-15:
+    runs-on: macos-15 # https://github.com/actions/runner-images/blob/main/images/macos/macos-15-Readme.md
+    strategy:
+      matrix:
+        xcode: ['16.0', '16.1', '16.2']
+    env:
+      DEVELOPER_DIR: /Applications/Xcode_${{ matrix.xcode }}.app/Contents/Developer
+
+    steps:
+      - uses: actions/checkout@11bd71901bbe5b1630ceea73d27597364c9af683 # v4.2.2
+      - name: Run CMake
+        run: cmake -S . -B build -D CMAKE_BUILD_TYPE=Debug -DJSON_BuildTests=On -DJSON_FastTests=ON
+      - name: Build
+        run: cmake --build build --parallel 10
+      - name: Test
         run: cd build ; ctest -j 10 --output-on-failure
 
   xcode_standards:
-    runs-on: macos-10.15
+    runs-on: macos-latest
     strategy:
       matrix:
-        standard: [11, 14, 17, 20]
-    env:
-      DEVELOPER_DIR: /Applications/Xcode_12.4.app/Contents/Developer
+        standard: [11, 14, 17, 20, 23, 26]
 
     steps:
-      - uses: actions/checkout@v2
-      - name: cmake
-        run: cmake -S . -B build -D CMAKE_BUILD_TYPE=Debug -DJSON_BuildTests=On -DCMAKE_CXX_STANDARD=${{ matrix.standard }} -DCMAKE_CXX_STANDARD_REQUIRED=ON
-      - name: build
+      - uses: actions/checkout@11bd71901bbe5b1630ceea73d27597364c9af683 # v4.2.2
+      - name: Run CMake
+        run: cmake -S . -B build -D CMAKE_BUILD_TYPE=Debug -DJSON_BuildTests=On -DJSON_TestStandards=${{ matrix.standard }}
+      - name: Build
         run: cmake --build build --parallel 10
-      - name: test
+      - name: Test
         run: cd build ; ctest -j 10 --output-on-failure

.github/workflows/publish_documentation.yml

@@ -0,0 +1,46 @@
+name: Publish documentation
+
+# publish the documentation on every merge to develop branch
+on:
+  push:
+    branches:
+      - develop
+    paths:
+      - docs/mkdocs/**
+      - docs/examples/**
+  workflow_dispatch:
+
+# we don't want to have concurrent jobs, and we don't want to cancel running jobs to avoid broken publications
+concurrency:
+  group: documentation
+  cancel-in-progress: false
+
+permissions:
+  contents: read
+
+jobs:
+  publish_documentation:
+    permissions:
+      contents: write
+
+    if: github.repository == 'nlohmann/json'
+    runs-on: ubuntu-22.04
+    steps:
+      - name: Harden Runner
+        uses: step-security/harden-runner@4d991eb9b905ef189e4c376166672c3f2f230481 # v2.11.0
+        with:
+          egress-policy: audit
+
+      - uses: actions/checkout@11bd71901bbe5b1630ceea73d27597364c9af683 # v4.2.2
+
+      - name: Install virtual environment
+        run: make install_venv -C docs/mkdocs
+
+      - name: Build documentation
+        run: make build -C docs/mkdocs
+
+      - name: Deploy documentation
+        uses: peaceiris/actions-gh-pages@4f9cc6602d3f66b9c108549d475ec49e8ef4d45e # v4.0.0
+        with:
+          github_token: ${{ secrets.GITHUB_TOKEN }}
+          publish_dir: ./docs/mkdocs/site

.github/workflows/scorecards.yml

@@ -0,0 +1,81 @@
+# This workflow uses actions that are not certified by GitHub. They are provided
+# by a third-party and are governed by separate terms of service, privacy
+# policy, and support documentation.
+
+name: Scorecard supply-chain security
+on:
+  # For Branch-Protection check. Only the default branch is supported. See
+  # https://github.com/ossf/scorecard/blob/main/docs/checks.md#branch-protection
+  branch_protection_rule:
+  # To guarantee Maintained check is occasionally updated. See
+  # https://github.com/ossf/scorecard/blob/main/docs/checks.md#maintained
+  schedule:
+    - cron: '20 7 * * 2'
+  push:
+    branches: ["develop"]
+
+permissions:
+  contents: read
+
+jobs:
+  analysis:
+    name: Scorecard analysis
+    runs-on: ubuntu-latest
+    permissions:
+      # Needed to upload the results to code-scanning dashboard.
+      security-events: write
+      # Needed to publish results and get a badge (see publish_results below).
+      id-token: write
+      contents: read
+      actions: read
+      # To allow GraphQL ListCommits to work
+      issues: read
+      pull-requests: read
+      # To detect SAST tools
+      checks: read
+
+    steps:
+      - name: Harden Runner
+        uses: step-security/harden-runner@4d991eb9b905ef189e4c376166672c3f2f230481 # v2.11.0
+        with:
+          egress-policy: audit
+
+      - name: "Checkout code"
+        uses: actions/checkout@11bd71901bbe5b1630ceea73d27597364c9af683 # v4.2.2
+        with:
+          persist-credentials: false
+
+      - name: "Run analysis"
+        uses: ossf/scorecard-action@f49aabe0b5af0936a0987cfb85d86b75731b0186 # v2.4.1
+        with:
+          results_file: results.sarif
+          results_format: sarif
+          # (Optional) "write" PAT token. Uncomment the `repo_token` line below if:
+          # - you want to enable the Branch-Protection check on a *public* repository, or
+          # - you are installing Scorecards on a *private* repository
+          # To create the PAT, follow the steps in https://github.com/ossf/scorecard-action#authentication-with-pat.
+          # repo_token: ${{ secrets.SCORECARD_TOKEN }}
+
+          # Public repositories:
+          #   - Publish results to OpenSSF REST API for easy access by consumers
+          #   - Allows the repository to include the Scorecard badge.
+          #   - See https://github.com/ossf/scorecard-action#publishing-results.
+          # For private repositories:
+          #   - `publish_results` will always be set to `false`, regardless
+          #     of the value entered here.
+          publish_results: true
+
+      # Upload the results as artifacts (optional). Commenting out will disable uploads of run results in SARIF
+      # format to the repository Actions tab.
+      - name: "Upload artifact"
+        uses: actions/upload-artifact@4cec3d8aa04e39d1a68397de0c4cd6fb9dce8ec1 # v4.6.1
+        with:
+          name: SARIF file
+          path: results.sarif
+          retention-days: 5
+
+      # Upload the results to GitHub's code scanning dashboard.
+      - name: "Upload to code-scanning"
+        uses: github/codeql-action/upload-sarif@b56ba49b26e50535fa1e7f7db0f4f7b4bf65d80d # v3.28.10
+        with:
+          sarif_file: results.sarif

.github/workflows/stale.yml

@@ -0,0 +1,34 @@
+name: 'Comment and close stale issues and PR'
+on:
+  schedule:
+    - cron: '0 0 * * *'
+
+permissions:
+  contents: read
+
+jobs:
+  stale:
+    runs-on: ubuntu-latest
+
+    permissions:
+      issues: write
+      pull-requests: write
+
+    steps:
+      - name: Harden Runner
+        uses: step-security/harden-runner@4d991eb9b905ef189e4c376166672c3f2f230481 # v2.11.0
+        with:
+          egress-policy: audit
+
+      - uses: actions/stale@5bef64f19d7facfb25b37b414482c7164d639639 # v9.1.0
+        with:
+          stale-issue-label: 'state: stale'
+          stale-pr-label: 'state: stale'
+          exempt-issue-labels: 'pinned,security'
+          stale-issue-message: 'This issue has been marked as stale because it has been open for 90 days without activity. If this issue is still relevant, please add a comment or remove the "stale" label. Otherwise, it will be closed in 10 days. Thank you for helping us prioritize our work!'
+          stale-pr-message: 'This pull request has been marked as stale because it has had no activity for 30 days. While we won’t close it automatically, we encourage you to update or comment if it is still relevant. Keeping pull requests active and up-to-date helps us review and merge changes more efficiently. Thank you for your contributions!'
+          close-issue-message: 'This issue has been closed after being marked as stale for 10 days without any further activity. If this was done in error or the issue is still relevant, please feel free to reopen it or create a new issue. We appreciate your understanding and contributions.'
+          days-before-stale: 90
+          days-before-pr-stale: 30
+          days-before-close: 10
+          days-before-pr-close: -1

.github/workflows/ubuntu.yml

@@ -7,97 +7,245 @@ on:
       - master
       - release/*
   pull_request:
+  workflow_dispatch:
+
+permissions:
+  contents: read
+
+concurrency:
+  group: ${{ github.workflow }}-${{ github.ref || github.run_id }}
+  cancel-in-progress: true
 
 jobs:
-  ci_test_clang:
-    runs-on: ubuntu-latest
-    container: ghcr.io/nlohmann/json-ci:v1.0.0
-    steps:
-      - uses: actions/checkout@v2
-      - name: cmake
-        run: cmake -S . -B build -DJSON_CI=On
-      - name: build
-        run: cmake --build build --target ci_test_clang
-
   ci_test_gcc:
     runs-on: ubuntu-latest
-    container: ghcr.io/nlohmann/json-ci:v1.0.0
+    container: gcc:latest
     steps:
-      - uses: actions/checkout@v2
-      - name: cmake
+      - uses: actions/checkout@11bd71901bbe5b1630ceea73d27597364c9af683 # v4.2.2
+      - name: Get latest CMake and ninja
+        uses: lukka/get-cmake@56d043d188c3612951d8755da8f4b709ec951ad6 # v3.31.6
+      - name: Run CMake
         run: cmake -S . -B build -DJSON_CI=On
-      - name: build
+      - name: Build
         run: cmake --build build --target ci_test_gcc
 
-  ci_static_analysis:
+  ci_infer:
+    runs-on: ubuntu-latest
+    container: ghcr.io/nlohmann/json-ci:v2.4.0
+    steps:
+      - uses: actions/checkout@11bd71901bbe5b1630ceea73d27597364c9af683 # v4.2.2
+      - name: Run CMake
+        run: cmake -S . -B build -DJSON_CI=On
+      - name: Build
+        run: cmake --build build --target ci_infer
+
+  ci_static_analysis_ubuntu:
     runs-on: ubuntu-latest
-    container: ghcr.io/nlohmann/json-ci:v1.0.0
     strategy:
       matrix:
-        target: [ci_clang_tidy, ci_cppcheck, ci_test_valgrind, ci_test_clang_sanitizer, ci_test_amalgamation, ci_clang_analyze, ci_cpplint, ci_cmake_flags, ci_single_binaries, ci_reproducible_tests, ci_non_git_tests, ci_offline_testdata, ci_infer]
+        target: [ci_test_amalgamation, ci_test_single_header, ci_cppcheck, ci_cpplint, ci_reproducible_tests, ci_non_git_tests, ci_offline_testdata, ci_reuse_compliance, ci_test_valgrind]
     steps:
-      - uses: actions/checkout@v2
-      - name: cmake
+      - name: Harden Runner
+        uses: step-security/harden-runner@4d991eb9b905ef189e4c376166672c3f2f230481 # v2.11.0
+        with:
+          egress-policy: audit
+
+      - name: Install Valgrind
+        run: sudo apt-get update ; sudo apt-get install -y valgrind
+      - uses: actions/checkout@11bd71901bbe5b1630ceea73d27597364c9af683 # v4.2.2
+      - name: Get latest CMake and ninja
+        uses: lukka/get-cmake@56d043d188c3612951d8755da8f4b709ec951ad6 # v3.31.6
+      - name: Run CMake
         run: cmake -S . -B build -DJSON_CI=On
-      - name: build
+      - name: Build
+        run: cmake --build build --target ${{ matrix.target }}
+
+  ci_static_analysis_clang:
+    runs-on: ubuntu-latest
+    container: silkeh/clang:dev
+    strategy:
+      matrix:
+        target: [ci_test_clang, ci_clang_tidy, ci_test_clang_sanitizer, ci_clang_analyze, ci_single_binaries]
+    steps:
+      - name: Install git, clang-tools, iwyu (ci_single_binaries), and unzip
+        run: apt-get update ; apt-get install -y git clang-tools iwyu unzip
+      - uses: actions/checkout@11bd71901bbe5b1630ceea73d27597364c9af683 # v4.2.2
+      - name: Get latest CMake and ninja
+        uses: lukka/get-cmake@56d043d188c3612951d8755da8f4b709ec951ad6 # v3.31.6
+      - name: Run CMake
+        run: cmake -S . -B build -DJSON_CI=On
+      - name: Build
         run: cmake --build build --target ${{ matrix.target }}
 
   ci_cmake_options:
     runs-on: ubuntu-latest
-    container: ghcr.io/nlohmann/json-ci:v1.0.0
+    container: ubuntu:focal
     strategy:
       matrix:
-        target: [ci_test_diagnostics, ci_test_noexceptions, ci_test_noimplicitconversions]
+        target: [ci_cmake_flags, ci_test_diagnostics, ci_test_diagnostic_positions, ci_test_noexceptions, ci_test_noimplicitconversions, ci_test_legacycomparison, ci_test_noglobaludls]
     steps:
-      - uses: actions/checkout@v2
-      - name: cmake
+      - name: Install build-essential
+        run: apt-get update ; apt-get install -y build-essential unzip wget git
+      - uses: actions/checkout@11bd71901bbe5b1630ceea73d27597364c9af683 # v4.2.2
+      - name: Get latest CMake and ninja
+        uses: lukka/get-cmake@56d043d188c3612951d8755da8f4b709ec951ad6 # v3.31.6
+      - name: Run CMake
         run: cmake -S . -B build -DJSON_CI=On
-      - name: build
+      - name: Build
         run: cmake --build build --target ${{ matrix.target }}
 
   ci_test_coverage:
     runs-on: ubuntu-latest
-    container: ghcr.io/nlohmann/json-ci:v1.0.0
     steps:
-      - uses: actions/checkout@v2
-      - name: cmake
+      - name: Harden Runner
+        uses: step-security/harden-runner@4d991eb9b905ef189e4c376166672c3f2f230481 # v2.11.0
+        with:
+          egress-policy: audit
+
+      - uses: actions/checkout@11bd71901bbe5b1630ceea73d27597364c9af683 # v4.2.2
+      - name: Install dependencies and de_DE locale
+        run: |
+          sudo apt-get clean
+          sudo apt-get update
+          sudo apt-get install -y build-essential cmake lcov ninja-build make locales gcc-multilib g++-multilib
+          sudo locale-gen de_DE
+          sudo update-locale
+      - name: Run CMake
         run: cmake -S . -B build -DJSON_CI=On
-      - name: build
+      - name: Build
         run: cmake --build build --target ci_test_coverage
-      - name: archive coverage report
-        uses: actions/upload-artifact@v2
+      - name: Archive coverage report
+        uses: actions/upload-artifact@4cec3d8aa04e39d1a68397de0c4cd6fb9dce8ec1 # v4.6.1
         with:
           name: code-coverage-report
-          path: /__w/json/json/build/html
-      - name: Coveralls
-        uses: coverallsapp/github-action@master
+          path: ${{ github.workspace }}/build/html
+      - name: Publish report to Coveralls
+        uses: coverallsapp/github-action@648a8eb78e6d50909eff900e4ec85cab4524a45b # v2.3.6
         with:
           github-token: ${{ secrets.GITHUB_TOKEN }}
-          path-to-lcov: /__w/json/json/build/json.info.filtered.noexcept
+          path-to-lcov: ${{ github.workspace }}/build/json.info.filtered.noexcept
 
-  ci_test_compilers:
+  ci_test_compilers_gcc_old:
     runs-on: ubuntu-latest
-    container: ghcr.io/nlohmann/json-ci:v1.0.0
     strategy:
       matrix:
-        compiler: [g++-4.8, g++-4.9, g++-5, g++-7, g++-8, g++-9, g++-10, clang++-3.5, clang++-3.6, clang++-3.7, clang++-3.8, clang++-3.9, clang++-4.0, clang++-5.0, clang++-6.0, clang++-7, clang++-8, clang++-9, clang++-10, clang++-11, clang++-12]
+        compiler: ['4.8', '4.9', '5', '6']
+    container: ghcr.io/nlohmann/json-ci:v2.4.0
     steps:
-      - uses: actions/checkout@v2
-      - name: cmake
-        run: cmake -S . -B build -DJSON_CI=On
-      - name: build
-        run: cmake --build build --target ci_test_compiler_${{ matrix.compiler }}
+      - uses: actions/checkout@11bd71901bbe5b1630ceea73d27597364c9af683 # v4.2.2
+      - name: Run CMake
+        run: CXX=g++-${{ matrix.compiler }} cmake -S . -B build -DJSON_CI=On
+      - name: Build
+        run: cmake --build build --target ci_test_compiler_g++-${{ matrix.compiler }}
 
-  ci_test_standards:
+  ci_test_compilers_gcc:
     runs-on: ubuntu-latest
-    container: ghcr.io/nlohmann/json-ci:v1.0.0
     strategy:
       matrix:
-        standard: [11, 14, 17, 20]
-        compiler: [gcc, clang]
+        # older GCC docker images (4, 5, 6) fail to check out code
+        compiler: ['7', '8', '9', '10', '11', '12', '13', '14', 'latest']
+    container: gcc:${{ matrix.compiler }}
     steps:
-      - uses: actions/checkout@v2
-      - name: cmake
+      - uses: actions/checkout@11bd71901bbe5b1630ceea73d27597364c9af683 # v4.2.2
+      - name: Get latest CMake and ninja
+        uses: lukka/get-cmake@56d043d188c3612951d8755da8f4b709ec951ad6 # v3.31.6
+      - name: Run CMake
         run: cmake -S . -B build -DJSON_CI=On
-      - name: build
-        run: cmake --build build --target ci_test_${{ matrix.compiler }}_cxx${{ matrix.standard }}
+      - name: Build
+        run: cmake --build build --target ci_test_compiler_default
+
+  ci_test_compilers_clang:
+    runs-on: ubuntu-latest
+    strategy:
+      matrix:
+        compiler: ['3.4', '3.5', '3.6', '3.7', '3.8', '3.9', '4', '5', '6', '7', '8', '9', '10', '11', '12', '13', '14', '15-bullseye', '16', '17', '18', '19', 'latest']
+    container: silkeh/clang:${{ matrix.compiler }}
+    steps:
+      - name: Install unzip and git
+        run: apt-get update ; apt-get install -y unzip git
+      - uses: actions/checkout@11bd71901bbe5b1630ceea73d27597364c9af683 # v4.2.2
+      - name: Get latest CMake and ninja
+        uses: lukka/get-cmake@56d043d188c3612951d8755da8f4b709ec951ad6 # v3.31.6
+      - name: Set env FORCE_STDCPPFS_FLAG for clang 7 / 8 / 9 / 10
+        run: echo "JSON_FORCED_GLOBAL_COMPILE_OPTIONS=-DJSON_HAS_FILESYSTEM=0;-DJSON_HAS_EXPERIMENTAL_FILESYSTEM=0" >> "$GITHUB_ENV"
+        if: ${{ matrix.compiler == '7' || matrix.compiler == '8' || matrix.compiler == '9' || matrix.compiler == '10' }}
+      - name: Run CMake
+        run: cmake -S . -B build -DJSON_CI=On
+      - name: Build
+        run: cmake --build build --target ci_test_compiler_default
+
+  ci_test_standards_gcc:
+    runs-on: ubuntu-latest
+    container: gcc:latest
+    strategy:
+      matrix:
+        standard: [11, 14, 17, 20, 23, 26]
+    steps:
+      - uses: actions/checkout@11bd71901bbe5b1630ceea73d27597364c9af683 # v4.2.2
+      - name: Get latest CMake and ninja
+        uses: lukka/get-cmake@56d043d188c3612951d8755da8f4b709ec951ad6 # v3.31.6
+      - name: Run CMake
+        run: cmake -S . -B build -DJSON_CI=On
+      - name: Build
+        run: cmake --build build --target ci_test_gcc_cxx${{ matrix.standard }}
+
+  ci_test_standards_clang:
+    runs-on: ubuntu-latest
+    container: silkeh/clang:latest
+    strategy:
+      matrix:
+        standard: [11, 14, 17, 20, 23, 26]
+        stdlib: [libcxx, libstdcxx]
+    steps:
+      - name: Install git and unzip
+        run: apt-get update ; apt-get install -y git unzip
+      - uses: actions/checkout@11bd71901bbe5b1630ceea73d27597364c9af683 # v4.2.2
+      - name: Get latest CMake and ninja
+        uses: lukka/get-cmake@56d043d188c3612951d8755da8f4b709ec951ad6 # v3.31.6
+      - name: Run CMake
+        run: cmake -S . -B build -DJSON_CI=On
+      - name: Build with libc++
+        run: cmake --build build --target ci_test_clang_libcxx_cxx${{ matrix.standard }}
+        if: ${{ matrix.stdlib == 'libcxx' }}
+      - name: Build with libstdc++
+        run: cmake --build build --target ci_test_clang_cxx${{ matrix.standard }}
+        if: ${{ matrix.stdlib == 'libstdcxx' }}
+
+  ci_cuda_example:
+    runs-on: ubuntu-latest
+    container: ghcr.io/nlohmann/json-ci:v2.4.0
+    steps:
+      - uses: actions/checkout@11bd71901bbe5b1630ceea73d27597364c9af683 # v4.2.2
+      - name: Run CMake
+        run: cmake -S . -B build -DJSON_CI=On
+      - name: Build
+        run: cmake --build build --target ci_cuda_example
+
+  ci_icpc:
+    runs-on: ubuntu-latest
+    container: ghcr.io/nlohmann/json-ci:v2.2.0
+    steps:
+      - uses: actions/checkout@11bd71901bbe5b1630ceea73d27597364c9af683 # v4.2.2
+      - name: Run CMake
+        run: cmake -S . -B build -DJSON_CI=On
+      - name: Build
+        run: |
+          . /opt/intel/oneapi/setvars.sh
+          cmake --build build --target ci_icpc
+
+  ci_test_documentation:
+    runs-on: ubuntu-latest
+    strategy:
+      matrix:
+        target: [ci_test_examples, ci_test_build_documentation]
+    steps:
+      - name: Harden Runner
+        uses: step-security/harden-runner@4d991eb9b905ef189e4c376166672c3f2f230481 # v2.11.0
+        with:
+          egress-policy: audit
+
+      - uses: actions/checkout@11bd71901bbe5b1630ceea73d27597364c9af683 # v4.2.2
+      - name: Run CMake
+        run: cmake -S . -B build -DJSON_CI=On
+      - name: Build
+        run: cmake --build build --target ${{ matrix.target }}

.github/workflows/windows.yml

@@ -7,122 +7,128 @@ on:
       - master
       - release/*
   pull_request:
+  workflow_dispatch:
+
+permissions:
+  contents: read
+
+concurrency:
+  group: ${{ github.workflow }}-${{ github.ref || github.run_id }}
+  cancel-in-progress: true
 
 jobs:
   mingw:
-    runs-on: windows-latest
+    runs-on: windows-2019
     strategy:
       matrix:
         architecture: [x64, x86]
 
     steps:
-      - uses: actions/checkout@v2
+      - uses: actions/checkout@11bd71901bbe5b1630ceea73d27597364c9af683 # v4.2.2
       - name: Set up MinGW
-        uses: egor-tensin/setup-mingw@v2
+        uses: egor-tensin/setup-mingw@84c781b557efd538dec66bde06988d81cd3138cf # v2.2.0
         with:
           platform: ${{ matrix.architecture }}
-      - name: cmake
+          version: 12.2.0 # https://github.com/egor-tensin/setup-mingw/issues/14
+      - name: Run CMake
         run: cmake -S . -B build -G "MinGW Makefiles" -DCMAKE_BUILD_TYPE=Debug -DJSON_BuildTests=On
-      - name: build
+      - name: Build
         run: cmake --build build --parallel 10
-      - name: test
+      - name: Test
         run: cd build ; ctest -j 10 -C Debug --output-on-failure
 
-  msvc2017:
-    runs-on: windows-2016
-    strategy:
-      matrix:
-        build_type: [Debug, Release]
-        architecture: [Win32, x64]
-
-    steps:
-    - uses: actions/checkout@v2
-    - name: cmake
-      run: cmake -S . -B build -G "Visual Studio 15 2017" -A ${{ matrix.architecture }} -DJSON_BuildTests=On -DCMAKE_CXX_FLAGS="/W4 /WX"
-      if: matrix.build_type == 'Release' && matrix.architecture == 'x64'
-    - name: cmake
-      run: cmake -S . -B build -G "Visual Studio 15 2017" -A ${{ matrix.architecture }} -DJSON_BuildTests=On -DCMAKE_CXX_FLAGS="/W4 /WX"
-      if: matrix.build_type == 'Release' && matrix.architecture != 'x64'
-    - name: cmake
-      run: cmake -S . -B build -G "Visual Studio 15 2017" -A ${{ matrix.architecture }} -DJSON_BuildTests=On -DJSON_FastTests=ON -DCMAKE_CXX_FLAGS="/W4 /WX"
-      if: matrix.build_type == 'Debug'
-    - name: build
-      run: cmake --build build --config ${{ matrix.build_type }} --parallel 10
-    - name: test
-      run: cd build ; ctest -j 10 -C ${{ matrix.build_type }} --output-on-failure
-
-  msvc2017_latest:
-    runs-on: windows-2016
-
-    steps:
-    - uses: actions/checkout@v2
-    - name: cmake
-      run: cmake -S . -B build -G "Visual Studio 15 2017" -DJSON_BuildTests=On -DCMAKE_CXX_FLAGS="/permissive- /std:c++latest /utf-8 /W4 /WX"
-    - name: build
-      run: cmake --build build --config Release --parallel 10
-    - name: test
-      run: cd build ; ctest -j 10 -C Release --output-on-failure
-
   msvc2019:
-    runs-on: windows-latest
+    runs-on: windows-2019
     strategy:
       matrix:
         build_type: [Debug, Release]
         architecture: [Win32, x64]
 
     steps:
-    - uses: actions/checkout@v2
-    - name: cmake
+    - uses: actions/checkout@11bd71901bbe5b1630ceea73d27597364c9af683 # v4.2.2
+    - name: Run CMake
       run: cmake -S . -B build -G "Visual Studio 16 2019" -A ${{ matrix.architecture }} -DJSON_BuildTests=On -DCMAKE_CXX_FLAGS="/W4 /WX"
       if: matrix.build_type == 'Release'
-    - name: cmake
+    - name: Run CMake
       run: cmake -S . -B build -G "Visual Studio 16 2019" -A ${{ matrix.architecture }} -DJSON_BuildTests=On -DJSON_FastTests=ON -DCMAKE_CXX_FLAGS="/W4 /WX"
       if: matrix.build_type == 'Debug'
-    - name: build
+    - name: Build
       run: cmake --build build --config ${{ matrix.build_type }} --parallel 10
-    - name: test
+    - name: Test
       run: cd build ; ctest -j 10 -C ${{ matrix.build_type }} --output-on-failure
 
   msvc2019_latest:
-    runs-on: windows-latest
+    runs-on: windows-2019
 
     steps:
-    - uses: actions/checkout@v2
-    - name: cmake
+    - uses: actions/checkout@11bd71901bbe5b1630ceea73d27597364c9af683 # v4.2.2
+    - name: Run CMake
       run: cmake -S . -B build -G "Visual Studio 16 2019" -DJSON_BuildTests=On -DCMAKE_CXX_FLAGS="/permissive- /std:c++latest /utf-8 /W4 /WX"
-    - name: build
+    - name: Build
       run: cmake --build build --config Release --parallel 10
-    - name: test
+    - name: Test
+      run: cd build ; ctest -j 10 -C Release --output-on-failure
+
+  msvc2022:
+    runs-on: windows-2022
+    strategy:
+      matrix:
+        build_type: [Debug, Release]
+        architecture: [Win32, x64]
+
+    steps:
+    - uses: actions/checkout@11bd71901bbe5b1630ceea73d27597364c9af683 # v4.2.2
+    - name: Run CMake
+      run: cmake -S . -B build -G "Visual Studio 17 2022" -A ${{ matrix.architecture }} -DJSON_BuildTests=On -DCMAKE_CXX_FLAGS="/W4 /WX"
+      if: matrix.build_type == 'Release'
+    - name: Run CMake
+      run: cmake -S . -B build -G "Visual Studio 17 2022" -A ${{ matrix.architecture }} -DJSON_BuildTests=On -DJSON_FastTests=ON -DCMAKE_CXX_FLAGS="/W4 /WX"
+      if: matrix.build_type == 'Debug'
+    - name: Build
+      run: cmake --build build --config ${{ matrix.build_type }} --parallel 10
+    - name: Test
+      run: cd build ; ctest -j 10 -C ${{ matrix.build_type }} --output-on-failure
+
+  msvc2022_latest:
+    runs-on: windows-2022
+
+    steps:
+    - uses: actions/checkout@11bd71901bbe5b1630ceea73d27597364c9af683 # v4.2.2
+    - name: Run CMake
+      run: cmake -S . -B build -G "Visual Studio 17 2022" -DJSON_BuildTests=On -DCMAKE_CXX_FLAGS="/permissive- /std:c++latest /utf-8 /W4 /WX"
+    - name: Build
+      run: cmake --build build --config Release --parallel 10
+    - name: Test
       run: cd build ; ctest -j 10 -C Release --output-on-failure
 
   clang:
-    runs-on: windows-latest
+    runs-on: windows-2019
     strategy:
       matrix:
-        version: [11, 12]
+        version: [11, 12, 13, 14, 15]
 
     steps:
-      - uses: actions/checkout@v2
-      - name: install Clang
+      - uses: actions/checkout@11bd71901bbe5b1630ceea73d27597364c9af683 # v4.2.2
+      - name: Install Clang
         run: curl -fsSL -o LLVM${{ matrix.version }}.exe https://github.com/llvm/llvm-project/releases/download/llvmorg-${{ matrix.version }}.0.0/LLVM-${{ matrix.version }}.0.0-win64.exe ; 7z x LLVM${{ matrix.version }}.exe -y -o"C:/Program Files/LLVM"
-      - name: cmake
+      - name: Run CMake
         run: cmake -S . -B build -DCMAKE_CXX_COMPILER="C:/Program Files/LLVM/bin/clang++.exe" -G"MinGW Makefiles" -DCMAKE_BUILD_TYPE=Debug -DJSON_BuildTests=On
-      - name: build
+      - name: Build
         run: cmake --build build --parallel 10
-      - name: test
+      - name: Test
         run: cd build ; ctest -j 10 -C Debug --exclude-regex "test-unicode" --output-on-failure
 
   clang-cl-11:
-    runs-on: windows-latest
+    runs-on: windows-2019
     strategy:
       matrix:
         architecture: [Win32, x64]
 
     steps:
-      - uses: actions/checkout@v2
-      - name: cmake
+      - uses: actions/checkout@11bd71901bbe5b1630ceea73d27597364c9af683 # v4.2.2
+      - name: Run CMake
         run: cmake -S . -B build -G "Visual Studio 16 2019" -A ${{ matrix.architecture }} -T ClangCL -DJSON_BuildTests=On
-      - name: build
+      - name: Build
         run: cmake --build build --config Debug --parallel 10
-      - name: test
+      - name: Test
         run: cd build ; ctest -j 10 -C Debug --exclude-regex "test-unicode" --output-on-failure

.gitignore

@@ -1,33 +1,47 @@
-json_unit
-json_benchmarks
-json_benchmarks_simple
-fuzz-testing
-
 *.dSYM
 *.o
 *.gcno
 *.gcda
+.DS_Store
 
-build
-build_coverage
-clang_analyze_build
-
-benchmarks/files/numbers/*.json
-
-.wsjcpp-logs/*
-.wsjcpp/*
-
-.idea
+/.idea
 /cmake-build-*
 
-test/test-*
-/.vs
+# Visual Studio / Visual Studio Code
+/.vs/
+/.vscode/
+/out/
 
-doc/html
-doc/mkdocs/venv/
-doc/mkdocs/docs/images
-doc/mkdocs/docs/examples
-doc/mkdocs/site
-doc/mkdocs/docs/__pycache__/
-/doc/docset/JSON_for_Modern_C++.docset/
-/doc/docset/JSON_for_Modern_C++.tgz
+# clangd cache
+/.cache/
+
+# build directories (vscode-cmake-tools, user-defined, ...)
+/build*/
+
+# fuzzers
+/tests/corpus_*
+/tests/parse_*_fuzzer
+
+# documentation
+/docs/docset/JSON_for_Modern_C++.docset/
+/docs/docset/JSON_for_Modern_C++.tgz
+/docs/docset/docSet.dsidx
+/docs/mkdocs/.cache/
+/docs/mkdocs/docs/__pycache__/
+/docs/mkdocs/site/
+/docs/mkdocs/venv/
+
+# serve_header
+/localhost.pem
+/localhost-key.pem
+/serve_header.yml
+
+# Swift Package Manager build directory
+/.build
+
+venv
+
+nlohmann_json.spdx
+
+# Bazel-related
+MODULE.bazel.lock

.reuse/dep5

@@ -0,0 +1,36 @@
+Format: https://www.debian.org/doc/packaging-manuals/copyright-format/1.0/
+Upstream-Name: json
+Upstream-Contact: Niels Lohmann <mail@nlohmann.me>
+Source: https://github.com/nlohmann/json
+
+Files: *
+Copyright: 2013-2025 Niels Lohmann <https://nlohmann.me>
+License: MIT
+
+Files: include/nlohmann/thirdparty/hedley.hpp
+Copyright: 2016-2021 Evan Nemerson <evan@nemerson.com>
+License: CC0
+
+Files: tests/thirdparty/doctest/*
+Copyright: 2016-2023 Viktor Kirilov
+License: MIT
+
+Files: tests/thirdparty/fifo_map/*
+Copyright: 2015-2017 Niels Lohmann
+License: MIT
+
+Files: tests/thirdparty/Fuzzer/*
+Copyright: 2003-2022 LLVM Project.
+License: Apache-2.0
+
+Files: tests/thirdparty/imapdl/*
+Copyright: 2017 Georg Sauthoff <mail@gms.tf>
+License: GPL-3.0-only
+
+Files: tools/amalgamate/*
+Copyright: 2012 Erik Edlund <erik.edlund@32767.se>
+License: BSD-3-Clause
+
+Files: tools/gdb_pretty_printer/*
+Copyright: 2020 Hannes Domani <https://github.com/ssbssa>
+License: MIT

.reuse/templates/json.jinja2

@@ -0,0 +1,11 @@
+    __ _____ _____ _____
+ __|  |   __|     |   | |  JSON for Modern C++
+|  |  |__   |  |  | | | |  version 3.11.3
+|_____|_____|_____|_|___|  https://github.com/nlohmann/json
+
+{% for copyright_line in copyright_lines %}
+{{ copyright_line }}
+{% endfor %}
+{% for expression in spdx_expressions %}
+SPDX-License-Identifier: {{ expression }}
+{% endfor %}

.reuse/templates/json_support.jinja2

@@ -0,0 +1,11 @@
+    __ _____ _____ _____
+ __|  |   __|     |   | |  JSON for Modern C++ (supporting code)
+|  |  |__   |  |  | | | |  version 3.11.3
+|_____|_____|_____|_|___|  https://github.com/nlohmann/json
+
+{% for copyright_line in copyright_lines %}
+{{ copyright_line }}
+{% endfor %}
+{% for expression in spdx_expressions %}
+SPDX-License-Identifier: {{ expression }}
+{% endfor %}

.travis.yml

@@ -1,94 +0,0 @@
-#########################
-# project configuration #
-#########################
-
-# C++ project
-language: cpp
-
-dist: trusty
-sudo: required
-group: edge
-
-
-################
-# build matrix #
-################
-
-matrix:
-  include:
-
-  # Coverity (only for branch coverity_scan)
-
-  - os: linux
-    compiler: clang
-    before_install: echo -n | openssl s_client -connect scan.coverity.com:443 | sed -ne '/-BEGIN CERTIFICATE-/,/-END CERTIFICATE-/p' | sudo tee -a /etc/ssl/certs/ca-certificates.crt
-    addons:
-      apt:
-        sources: ['ubuntu-toolchain-r-test', 'llvm-toolchain-precise-3.6']
-        packages: ['g++-6', 'clang-3.6', 'ninja-build']
-      coverity_scan:
-        project:
-          name: "nlohmann/json"
-          description: "Build submitted via Travis CI"
-        notification_email: niels.lohmann@gmail.com
-        build_command_prepend: "mkdir coverity_build ; cd coverity_build ; cmake .. ; cd .."
-        build_command: "make -C coverity_build"
-        branch_pattern: coverity_scan
-    env:
-      - SPECIAL=coverity
-      - COMPILER=clang++-3.6
-        # The next declaration is the encrypted COVERITY_SCAN_TOKEN, created
-        #   via the "travis encrypt" command using the project repo's public key
-      - secure: "m89SSgE+ASLO38rSKx7MTXK3n5NkP9bIx95jwY71YEiuFzib30PDJ/DifKnXxBjvy/AkCGztErQRk/8ZCvq+4HXozU2knEGnL/RUitvlwbhzfh2D4lmS3BvWBGS3N3NewoPBrRmdcvnT0xjOGXxtZaJ3P74TkB9GBnlz/HmKORA="
-
-  # OSX / Clang
-
-  - os: osx
-    osx_image: xcode10.2
-
-  # Linux / GCC
-
-  - os: linux
-    compiler: gcc
-    env: COMPILER=g++-6
-    addons:
-      apt:
-        sources: ['ubuntu-toolchain-r-test']
-        packages: ['g++-6', 'ninja-build']
-
-################
-# build script #
-################
-
-script:
-  # get CMake and Ninja (only for systems with brew - macOS)
-  - |
-     if [[ (-x $(which brew)) ]]; then
-       brew update
-       brew install cmake ninja
-       brew upgrade cmake
-       cmake --version
-     fi
-
-  # make sure CXX is correctly set
-  - if [[ "${COMPILER}" != "" ]]; then export CXX=${COMPILER}; fi
-
-  # append CXX_STANDARD to CMAKE_OPTIONS if required
-  - CMAKE_OPTIONS+=${CXX_STANDARD:+ -DCMAKE_CXX_STANDARD=$CXX_STANDARD -DCMAKE_CXX_STANDARD_REQUIRED=ON}
-
-  # build configuration
-  - CMAKE_OPTIONS+=" -DCMAKE_BUILD_TYPE=Release"
-
-  # compile and execute unit tests
-  - mkdir -p build && cd build
-  - cmake .. ${CMAKE_OPTIONS} -DJSON_BuildTests=On -GNinja && cmake --build .
-  - ctest --timeout 2700 -V -j
-  - cd ..
-
-  # check if homebrew works (only checks develop branch)   
-  - if [ `which brew` ]; then   
-    brew update ;   
-    brew tap nlohmann/json ;    
-    brew install nlohmann_json --HEAD ;    
-    brew test nlohmann_json ;    
-    fi

BUILD.bazel

@@ -0,0 +1,80 @@
+load("@rules_cc//cc:cc_library.bzl", "cc_library")
+load("@rules_license//rules:license.bzl", "license")
+
+package(
+    default_applicable_licenses = [":license"],
+)
+
+exports_files([
+    "LICENSE.MIT",
+])
+
+license(
+    name = "license",
+    license_kinds = ["@rules_license//licenses/spdx:MIT"],
+    license_text = "LICENSE.MIT",
+)
+
+cc_library(
+    name = "json",
+    hdrs = [
+        "include/nlohmann/adl_serializer.hpp",
+        "include/nlohmann/byte_container_with_subtype.hpp",
+        "include/nlohmann/detail/abi_macros.hpp",
+        "include/nlohmann/detail/conversions/from_json.hpp",
+        "include/nlohmann/detail/conversions/to_chars.hpp",
+        "include/nlohmann/detail/conversions/to_json.hpp",
+        "include/nlohmann/detail/exceptions.hpp",
+        "include/nlohmann/detail/hash.hpp",
+        "include/nlohmann/detail/input/binary_reader.hpp",
+        "include/nlohmann/detail/input/input_adapters.hpp",
+        "include/nlohmann/detail/input/json_sax.hpp",
+        "include/nlohmann/detail/input/lexer.hpp",
+        "include/nlohmann/detail/input/parser.hpp",
+        "include/nlohmann/detail/input/position_t.hpp",
+        "include/nlohmann/detail/iterators/internal_iterator.hpp",
+        "include/nlohmann/detail/iterators/iter_impl.hpp",
+        "include/nlohmann/detail/iterators/iteration_proxy.hpp",
+        "include/nlohmann/detail/iterators/iterator_traits.hpp",
+        "include/nlohmann/detail/iterators/json_reverse_iterator.hpp",
+        "include/nlohmann/detail/iterators/primitive_iterator.hpp",
+        "include/nlohmann/detail/json_custom_base_class.hpp",
+        "include/nlohmann/detail/json_pointer.hpp",
+        "include/nlohmann/detail/json_ref.hpp",
+        "include/nlohmann/detail/macro_scope.hpp",
+        "include/nlohmann/detail/macro_unscope.hpp",
+        "include/nlohmann/detail/meta/call_std/begin.hpp",
+        "include/nlohmann/detail/meta/call_std/end.hpp",
+        "include/nlohmann/detail/meta/cpp_future.hpp",
+        "include/nlohmann/detail/meta/detected.hpp",
+        "include/nlohmann/detail/meta/identity_tag.hpp",
+        "include/nlohmann/detail/meta/is_sax.hpp",
+        "include/nlohmann/detail/meta/std_fs.hpp",
+        "include/nlohmann/detail/meta/type_traits.hpp",
+        "include/nlohmann/detail/meta/void_t.hpp",
+        "include/nlohmann/detail/output/binary_writer.hpp",
+        "include/nlohmann/detail/output/output_adapters.hpp",
+        "include/nlohmann/detail/output/serializer.hpp",
+        "include/nlohmann/detail/string_concat.hpp",
+        "include/nlohmann/detail/string_escape.hpp",
+        "include/nlohmann/detail/string_utils.hpp",
+        "include/nlohmann/detail/value_t.hpp",
+        "include/nlohmann/json.hpp",
+        "include/nlohmann/json_fwd.hpp",
+        "include/nlohmann/ordered_map.hpp",
+        "include/nlohmann/thirdparty/hedley/hedley.hpp",
+        "include/nlohmann/thirdparty/hedley/hedley_undef.hpp",
+    ],
+    includes = ["include"],
+    visibility = ["//visibility:public"],
+    alwayslink = True,
+)
+
+cc_library(
+    name = "singleheader-json",
+    hdrs = [
+        "single_include/nlohmann/json.hpp",
+    ],
+    includes = ["single_include"],
+    visibility = ["//visibility:public"],
+)

CITATION.cff

@@ -1,14 +1,14 @@
-cff-version: 1.1.0
+cff-version: 1.2.0
 message: "If you use this software, please cite it as below."
-authors: 
+authors:
   - family-names: Lohmann
     given-names: Niels
     orcid: https://orcid.org/0000-0001-9037-795X
     email: mail@nlohmann.me
     website: https://nlohmann.me
 title: "JSON for Modern C++"
-version: 3.10.4
-date-released: 2021
+version: 3.11.3
+date-released: 2023-11-28
 license: MIT
 repository-code: "https://github.com/nlohmann"
 url: https://json.nlohmann.me

CMakeLists.txt

@@ -1,10 +1,10 @@
-cmake_minimum_required(VERSION 3.1)
+cmake_minimum_required(VERSION 3.1...3.14)
 
 ##
 ## PROJECT
 ## name and version
 ##
-project(nlohmann_json VERSION 3.10.4 LANGUAGES CXX)
+project(nlohmann_json VERSION 3.11.3 LANGUAGES CXX)
 
 ##
 ## MAIN_PROJECT CHECK
@@ -19,6 +19,7 @@ endif()
 ## INCLUDE
 ##
 ##
+set(CMAKE_MODULE_PATH ${CMAKE_CURRENT_SOURCE_DIR}/cmake ${CMAKE_MODULE_PATH})
 include(ExternalProject)
 
 ##
@@ -30,16 +31,26 @@ if (POLICY CMP0077)
     cmake_policy(SET CMP0077 NEW)
 endif ()
 
-option(JSON_BuildTests          "Build the unit tests when BUILD_TESTING is enabled." ${MAIN_PROJECT})
-option(JSON_CI                  "Enable CI build targets." OFF)
-option(JSON_Diagnostics         "Use extended diagnostic messages." OFF)
-option(JSON_ImplicitConversions "Enable implicit conversions." ON)
-option(JSON_Install             "Install CMake targets during install step." ${MAIN_PROJECT})
-option(JSON_MultipleHeaders     "Use non-amalgamated version of the library." OFF)
-option(JSON_SystemInclude       "Include as system headers (skip for clang-tidy)." OFF)
+# VERSION_GREATER_EQUAL is not available in CMake 3.1
+if(${MAIN_PROJECT} AND (${CMAKE_VERSION} VERSION_EQUAL 3.13 OR ${CMAKE_VERSION} VERSION_GREATER 3.13))
+    set(JSON_BuildTests_INIT ON)
+else()
+    set(JSON_BuildTests_INIT OFF)
+endif()
+option(JSON_BuildTests                     "Build the unit tests when BUILD_TESTING is enabled." ${JSON_BuildTests_INIT})
+option(JSON_CI                             "Enable CI build targets." OFF)
+option(JSON_Diagnostics                    "Use extended diagnostic messages." OFF)
+option(JSON_Diagnostic_Positions           "Enable diagnostic positions." OFF)
+option(JSON_GlobalUDLs                     "Place user-defined string literals in the global namespace." ON)
+option(JSON_ImplicitConversions            "Enable implicit conversions." ON)
+option(JSON_DisableEnumSerialization       "Disable default integer enum serialization." OFF)
+option(JSON_LegacyDiscardedValueComparison "Enable legacy discarded value comparison." OFF)
+option(JSON_Install                        "Install CMake targets during install step." ${MAIN_PROJECT})
+option(JSON_MultipleHeaders                "Use non-amalgamated version of the library." ON)
+option(JSON_SystemInclude                  "Include as system headers (skip for clang-tidy)." OFF)
 
 if (JSON_CI)
-    include(cmake/ci.cmake)
+    include(ci)
 endif ()
 
 ##
@@ -47,8 +58,12 @@ endif ()
 ##
 include(GNUInstallDirs)
 
-set(NLOHMANN_JSON_TARGET_NAME               ${PROJECT_NAME})
-set(NLOHMANN_JSON_CONFIG_INSTALL_DIR        "${CMAKE_INSTALL_LIBDIR}/cmake/${PROJECT_NAME}" CACHE INTERNAL "")
+if (NOT DEFINED NLOHMANN_JSON_TARGET_NAME)
+    # Allow overriding the target name when using FetchContent / add_subdirectory.
+    set(NLOHMANN_JSON_TARGET_NAME ${PROJECT_NAME})
+endif()
+
+set(NLOHMANN_JSON_CONFIG_INSTALL_DIR        "${CMAKE_INSTALL_DATADIR}/cmake/${PROJECT_NAME}" CACHE INTERNAL "")
 set(NLOHMANN_JSON_INCLUDE_INSTALL_DIR       "${CMAKE_INSTALL_INCLUDEDIR}")
 set(NLOHMANN_JSON_TARGETS_EXPORT_NAME       "${PROJECT_NAME}Targets")
 set(NLOHMANN_JSON_CMAKE_CONFIG_TEMPLATE     "cmake/config.cmake.in")
@@ -56,7 +71,7 @@ set(NLOHMANN_JSON_CMAKE_CONFIG_DIR          "${CMAKE_CURRENT_BINARY_DIR}")
 set(NLOHMANN_JSON_CMAKE_VERSION_CONFIG_FILE "${NLOHMANN_JSON_CMAKE_CONFIG_DIR}/${PROJECT_NAME}ConfigVersion.cmake")
 set(NLOHMANN_JSON_CMAKE_PROJECT_CONFIG_FILE "${NLOHMANN_JSON_CMAKE_CONFIG_DIR}/${PROJECT_NAME}Config.cmake")
 set(NLOHMANN_JSON_CMAKE_PROJECT_TARGETS_FILE "${NLOHMANN_JSON_CMAKE_CONFIG_DIR}/${PROJECT_NAME}Targets.cmake")
-set(NLOHMANN_JSON_PKGCONFIG_INSTALL_DIR     "${CMAKE_INSTALL_LIBDIR}/pkgconfig")
+set(NLOHMANN_JSON_PKGCONFIG_INSTALL_DIR     "${CMAKE_INSTALL_DATADIR}/pkgconfig")
 
 if (JSON_MultipleHeaders)
     set(NLOHMANN_JSON_INCLUDE_BUILD_DIR "${PROJECT_SOURCE_DIR}/include/")
@@ -67,11 +82,27 @@ else()
 endif()
 
 if (NOT JSON_ImplicitConversions)
-    message(STATUS "Implicit conversions are disabled")
+    message(STATUS "Implicit conversions are disabled (JSON_USE_IMPLICIT_CONVERSIONS=0)")
+endif()
+
+if (JSON_DisableEnumSerialization)
+    message(STATUS "Enum integer serialization is disabled (JSON_DISABLE_ENUM_SERIALIZATION=0)")
+endif()
+
+if (JSON_LegacyDiscardedValueComparison)
+    message(STATUS "Legacy discarded value comparison enabled (JSON_USE_LEGACY_DISCARDED_VALUE_COMPARISON=1)")
 endif()
 
 if (JSON_Diagnostics)
-    message(STATUS "Diagnostics enabled")
+    message(STATUS "Diagnostics enabled (JSON_DIAGNOSTICS=1)")
+endif()
+
+if (JSON_Diagnostic_Positions)
+    message(STATUS "Diagnostic positions enabled (JSON_DIAGNOSTIC_POSITIONS=1)")
+endif()
+
+if (NOT JSON_GlobalUDLs)
+    message(STATUS "User-defined string literals are not put in the global namespace (JSON_USE_GLOBAL_UDLS=0)")
 endif()
 
 if (JSON_SystemInclude)
@@ -93,15 +124,19 @@ endif()
 target_compile_definitions(
     ${NLOHMANN_JSON_TARGET_NAME}
     INTERFACE
-    JSON_USE_IMPLICIT_CONVERSIONS=$<BOOL:${JSON_ImplicitConversions}>
-    JSON_DIAGNOSTICS=$<BOOL:${JSON_Diagnostics}>
+    $<$<NOT:$<BOOL:${JSON_GlobalUDLs}>>:JSON_USE_GLOBAL_UDLS=0>
+    $<$<NOT:$<BOOL:${JSON_ImplicitConversions}>>:JSON_USE_IMPLICIT_CONVERSIONS=0>
+    $<$<BOOL:${JSON_DisableEnumSerialization}>:JSON_DISABLE_ENUM_SERIALIZATION=1>
+    $<$<BOOL:${JSON_Diagnostics}>:JSON_DIAGNOSTICS=1>
+    $<$<BOOL:${JSON_Diagnostic_Positions}>:JSON_DIAGNOSTIC_POSITIONS=1>
+    $<$<BOOL:${JSON_LegacyDiscardedValueComparison}>:JSON_USE_LEGACY_DISCARDED_VALUE_COMPARISON=1>
 )
 
 target_include_directories(
     ${NLOHMANN_JSON_TARGET_NAME}
     ${NLOHMANN_JSON_SYSTEM_INCLUDE} INTERFACE
     $<BUILD_INTERFACE:${NLOHMANN_JSON_INCLUDE_BUILD_DIR}>
-    $<INSTALL_INTERFACE:include>
+    $<INSTALL_INTERFACE:${NLOHMANN_JSON_INCLUDE_INSTALL_DIR}>
 )
 
 ## add debug view definition file for msvc (natvis)
@@ -120,6 +155,7 @@ endif()
 CONFIGURE_FILE(
     "${CMAKE_CURRENT_SOURCE_DIR}/cmake/pkg-config.pc.in"
     "${CMAKE_CURRENT_BINARY_DIR}/${PROJECT_NAME}.pc"
+    @ONLY
 )
 
 ##
@@ -129,7 +165,7 @@ CONFIGURE_FILE(
 if (JSON_BuildTests)
     include(CTest)
     enable_testing()
-    add_subdirectory(test)
+    add_subdirectory(tests)
 endif()
 
 ##
@@ -185,4 +221,5 @@ if(JSON_Install)
         FILES "${CMAKE_CURRENT_BINARY_DIR}/${PROJECT_NAME}.pc"
         DESTINATION ${NLOHMANN_JSON_PKGCONFIG_INSTALL_DIR}
     )
+    include(CPack)
 endif()

CODE_OF_CONDUCT.md

@@ -1,46 +0,0 @@
-# Contributor Covenant Code of Conduct
-
-## Our Pledge
-
-In the interest of fostering an open and welcoming environment, we as contributors and maintainers pledge to making participation in our project and our community a harassment-free experience for everyone, regardless of age, body size, disability, ethnicity, gender identity and expression, level of experience, nationality, personal appearance, race, religion, or sexual identity and orientation.
-
-## Our Standards
-
-Examples of behavior that contributes to creating a positive environment include:
-
-* Using welcoming and inclusive language
-* Being respectful of differing viewpoints and experiences
-* Gracefully accepting constructive criticism
-* Focusing on what is best for the community
-* Showing empathy towards other community members
-
-Examples of unacceptable behavior by participants include:
-
-* The use of sexualized language or imagery and unwelcome sexual attention or advances
-* Trolling, insulting/derogatory comments, and personal or political attacks
-* Public or private harassment
-* Publishing others' private information, such as a physical or electronic address, without explicit permission
-* Other conduct which could reasonably be considered inappropriate in a professional setting
-
-## Our Responsibilities
-
-Project maintainers are responsible for clarifying the standards of acceptable behavior and are expected to take appropriate and fair corrective action in response to any instances of unacceptable behavior.
-
-Project maintainers have the right and responsibility to remove, edit, or reject comments, commits, code, wiki edits, issues, and other contributions that are not aligned to this Code of Conduct, or to ban temporarily or permanently any contributor for other behaviors that they deem inappropriate, threatening, offensive, or harmful.
-
-## Scope
-
-This Code of Conduct applies both within project spaces and in public spaces when an individual is representing the project or its community. Examples of representing a project or community include using an official project e-mail address, posting via an official social media account, or acting as an appointed representative at an online or offline event. Representation of a project may be further defined and clarified by project maintainers.
-
-## Enforcement
-
-Instances of abusive, harassing, or otherwise unacceptable behavior may be reported by contacting the project team at mail@nlohmann.me. The project team will review and investigate all complaints, and will respond in a way that it deems appropriate to the circumstances. The project team is obligated to maintain confidentiality with regard to the reporter of an incident. Further details of specific enforcement policies may be posted separately.
-
-Project maintainers who do not follow or enforce the Code of Conduct in good faith may face temporary or permanent repercussions as determined by other members of the project's leadership.
-
-## Attribution
-
-This Code of Conduct is adapted from the [Contributor Covenant][homepage], version 1.4, available at [http://contributor-covenant.org/version/1/4][version]
-
-[homepage]: http://contributor-covenant.org
-[version]: http://contributor-covenant.org/version/1/4/

FILES.md

@@ -0,0 +1,239 @@
+# Supporting files
+
+This file describes the source for supporting files; that is, files that are not part of the library, but define the infrastructure and other aspects of the project.
+
+- [Continuous Integration](#continuous-integration)
+- [GitHub](#github)
+- [REUSE](#reuse)
+- [Package Managers](#package-managers)
+
+## Continuous Integration
+
+### `.cirrus.yml`
+
+Configuration file for the pipeline at [Cirrus CI](https://cirrus-ci.com/github/nlohmann/json).
+
+Further documentation:
+
+- [Writing tasks](https://cirrus-ci.org/guide/writing-tasks/)
+
+> [!IMPORTANT]
+> The filename `.cirrus.yml` and position (root of the repository) are predetermined by Cirrus CI.
+
+### `.github/external_ci/appveyor.yml`
+
+Configuration for the pipelines at [AppVeyor](https://ci.appveyor.com/project/nlohmann/json).
+
+Further documentation:
+
+- [appveyor.yml reference](https://www.appveyor.com/docs/appveyor-yml/)
+
+> [!NOTE]
+> The filename can be freely configured in the AppVeyor project.
+
+## GitHub
+
+### `CITATION.cff`
+
+A file to configure the citation for the repository which is displayed in the sidebar of the project.
+
+Further documentation:
+
+- [About CITATION files](https://docs.github.com/en/repositories/managing-your-repositorys-settings-and-features/customizing-your-repository/about-citation-files)
+
+> [!IMPORTANT]
+> The filename `CITATION.cff` and position (root of the repository) are predetermined by GitHub.
+
+### `.github/CODE_OF_CONDUCT.md`
+
+The code of conduct for the project. This is the Markdown version of the [Contributor Covenant Code of Conduct](https://www.contributor-covenant.org/version/2/1/code_of_conduct/). The code of conduct is linked on the [Community Standards](https://github.com/nlohmann/json/community) page and is mentioned by the Sentiment Bot.
+
+Further documentation:
+
+- [Adding a code of conduct to your project](https://docs.github.com/en/communities/setting-up-your-project-for-healthy-contributions/adding-a-code-of-conduct-to-your-project)
+
+> [!IMPORTANT]
+> The filename `.github/CODE_OF_CONDUCT.md` is predetermined by GitHub.
+
+> [!NOTE]
+> The file is part of the documentation and is included in `docs/mkdocs/docs/community/code_of_conduct.md`.
+
+### `.github/CODEOWNERS`
+
+The code owners file for the project which is used to select reviewers for new pull requests.
+
+Further documentation:
+
+- [About code owners](https://docs.github.com/en/repositories/managing-your-repositorys-settings-and-features/customizing-your-repository/about-code-owners)
+
+> [!IMPORTANT]
+> The filename `.github/CODEOWNERS` is predetermined by GitHub.
+
+### `.github/config.yml`
+
+Configuration file for [probot](https://probot.github.io/apps/), in particular the [Sentiment Bot](https://probot.github.io/apps/sentiment-bot/) and the [Request Info](https://probot.github.io/apps/request-info/).
+
+> [!IMPORTANT]
+> The filename `.github/config.yml` is predetermined by probot.
+
+### `.github/CONTRIBUTING.md`
+
+The contribution guidelines which are linked in the [Community Standards](https://github.com/nlohmann/json/community) and at <https://github.com/nlohmann/json/contribute>.
+
+Further documentation:
+
+- [Setting guidelines for repository contributors](https://docs.github.com/en/communities/setting-up-your-project-for-healthy-contributions/setting-guidelines-for-repository-contributors)
+
+> [!IMPORTANT]
+> The filename `.github/CONTRIBUTING.md` is predetermined by GitHub.
+
+> [!NOTE]
+> The file is part of the documentation and is included in `docs/mkdocs/docs/community/contribution_guidelines.md`.
+
+### `.github/dependabot.yml`
+
+The configuration of [dependabot](https://github.com/dependabot) which ensures the dependencies (GitHub actions and Python packages used in the CI) remain up-to-date.
+
+Further documentation:
+
+- [Configuring Dependabot security updates](https://docs.github.com/en/code-security/dependabot/dependabot-security-updates/configuring-dependabot-security-updates)
+
+> [!IMPORTANT]
+> The filename `.github/dependabot.yml` is predetermined by GitHub.
+
+### `.github/FUNDING.yml`
+
+A file to configure the sponsor button of the repository which is displayed in the sidebar of the project.
+
+Further documentation:
+
+- [Displaying a sponsor button in your repository](https://docs.github.com/en/repositories/managing-your-repositorys-settings-and-features/customizing-your-repository/displaying-a-sponsor-button-in-your-repository)
+
+> [!IMPORTANT]
+> The filename `.github/FUNDING.yml` is predetermined by GitHub.
+
+### `.github/ISSUE_TEMPLATE/bug.yaml`
+
+Issue form template for bugs.
+
+Further documentation:
+
+- [Configuring issue templates for your repository](https://docs.github.com/en/communities/using-templates-to-encourage-useful-issues-and-pull-requests/configuring-issue-templates-for-your-repository)
+
+> [!IMPORTANT]
+> The folder `.github/ISSUE_TEMPLATE` is predetermined by GitHub.
+
+### `.github/ISSUE_TEMPLATE/config.yaml`
+
+Issue template chooser configuration. The file is used to configure the dialog when a new issue is created.
+
+Further documentation:
+
+- [Configuring issue templates for your repository](https://docs.github.com/en/communities/using-templates-to-encourage-useful-issues-and-pull-requests/configuring-issue-templates-for-your-repository)
+
+> [!IMPORTANT]
+> The filename `.github/ISSUE_TEMPLATE/config.yaml` is predetermined by GitHub.
+
+### `.github/labeler.yml`
+
+Configuration file for the "Pull Request Labeler" workflow defined in `workflows/labeler.yml`. This file defines rules how labels are assigned to pull requests based on which files are changed.
+
+Further documentation:
+
+- [Label manager for PRs and issues based on configurable conditions](https://github.com/srvaroa/labeler)
+
+> [!NOTE]
+> The filename defaults to `.github/labeler.yml` and can be configured in the workflow.
+
+### `.github/PULL_REQUEST_TEMPLATE.md`
+
+The pull request template which prefills new pull requests.
+
+Further documentation:
+
+- [Creating a pull request template for your repository](https://docs.github.com/en/communities/using-templates-to-encourage-useful-issues-and-pull-requests/creating-a-pull-request-template-for-your-repository)
+
+> [!IMPORTANT]
+> The filename `.github/PULL_REQUEST_TEMPLATE.md` is predetermined by GitHub.
+
+### `.github/SECURITY.md`
+
+The goal is to describe how to securely report security vulnerabilities for this repository. The security policy is linked at <https://github.com/nlohmann/json/security/policy>.
+
+Further documentation:
+
+- [Adding a security policy to your repository](https://docs.github.com/en/code-security/getting-started/adding-a-security-policy-to-your-repository)
+
+> [!IMPORTANT]
+> The filename `.github/SECURITY.yml` is predetermined by GitHub.
+
+> [!NOTE]
+> The file is part of the documentation and is included in `docs/mkdocs/docs/community/security_policy.md`.
+
+### `LICENSE.MIT`
+
+The license of the project.
+
+Further documentation:
+
+- [Adding a license to a repository](https://docs.github.com/en/communities/setting-up-your-project-for-healthy-contributions/adding-a-license-to-a-repository)
+
+> [!IMPORTANT]
+> The filename `LICENSE.MIT` is partly predetermined by GitHub. The root filename must be `LICENSE`.
+
+## REUSE
+
+### `.reuse/dep5`
+
+The file defines the licenses of certain third-party component in the repository. The root `Makefile` contains a target `reuse` that checks for compliance.
+
+Further documentation:
+
+- [DEP5](https://reuse.software/spec-3.2/#dep5-deprecated)
+- [reuse command-line tool](https://pypi.org/project/reuse/)
+- [documentation of linting](https://reuse.readthedocs.io/en/stable/man/reuse-lint.html)
+- [REUSE](http://reuse.software)
+
+> [!IMPORTANT]
+> The filename `.reuse/dep5` is predetermined by REUSE. Alternatively, a `REUSE.toml` file can be used.
+
+### `.reuse/templates`
+
+Copyright header templates for source files. The root `Makefile` contains a target `reuse` that updates copyright headers with the templates.
+
+Further information:
+
+- [reuse command-line tool](https://pypi.org/project/reuse/)
+- [documentation on templates](https://reuse.readthedocs.io/en/stable/man/reuse-annotate.html#cmdoption-t)
+- [REUSE](http://reuse.software)
+
+> [!IMPORTANT]
+> The folder name `.reuse/templates` is predetermined by REUSE.
+
+### `LICENSES`
+
+A folder that contains every license of all licenses files (library and third-party code).
+
+Further documentation:
+
+- [REUSE specification](https://reuse.software/spec-3.3/)
+
+> [!IMPORTANT]
+> The folder name `LICENSES` is predetermined by REUSE.
+
+
+## Package Managers
+
+### `BUILD.bazel`
+
+The file can be updated by calling
+
+```shell
+make BUILD.bazel
+```
+
+### `meson.build`
+
+### `Package.swift`
+
+### `WORKSPACE.bazel`

LICENSE.MIT

@@ -1,6 +1,6 @@
 MIT License 
 
-Copyright (c) 2013-2021 Niels Lohmann
+Copyright (c) 2013-2025 Niels Lohmann
 
 Permission is hereby granted, free of charge, to any person obtaining a copy
 of this software and associated documentation files (the "Software"), to deal

LICENSES/Apache-2.0.txt

@@ -0,0 +1,73 @@
+Apache License
+Version 2.0, January 2004
+http://www.apache.org/licenses/
+
+TERMS AND CONDITIONS FOR USE, REPRODUCTION, AND DISTRIBUTION
+
+1. Definitions.
+
+"License" shall mean the terms and conditions for use, reproduction, and distribution as defined by Sections 1 through 9 of this document.
+
+"Licensor" shall mean the copyright owner or entity authorized by the copyright owner that is granting the License.
+
+"Legal Entity" shall mean the union of the acting entity and all other entities that control, are controlled by, or are under common control with that entity. For the purposes of this definition, "control" means (i) the power, direct or indirect, to cause the direction or management of such entity, whether by contract or otherwise, or (ii) ownership of fifty percent (50%) or more of the outstanding shares, or (iii) beneficial ownership of such entity.
+
+"You" (or "Your") shall mean an individual or Legal Entity exercising permissions granted by this License.
+
+"Source" form shall mean the preferred form for making modifications, including but not limited to software source code, documentation source, and configuration files.
+
+"Object" form shall mean any form resulting from mechanical transformation or translation of a Source form, including but not limited to compiled object code, generated documentation, and conversions to other media types.
+
+"Work" shall mean the work of authorship, whether in Source or Object form, made available under the License, as indicated by a copyright notice that is included in or attached to the work (an example is provided in the Appendix below).
+
+"Derivative Works" shall mean any work, whether in Source or Object form, that is based on (or derived from) the Work and for which the editorial revisions, annotations, elaborations, or other modifications represent, as a whole, an original work of authorship. For the purposes of this License, Derivative Works shall not include works that remain separable from, or merely link (or bind by name) to the interfaces of, the Work and Derivative Works thereof.
+
+"Contribution" shall mean any work of authorship, including the original version of the Work and any modifications or additions to that Work or Derivative Works thereof, that is intentionally submitted to Licensor for inclusion in the Work by the copyright owner or by an individual or Legal Entity authorized to submit on behalf of the copyright owner. For the purposes of this definition, "submitted" means any form of electronic, verbal, or written communication sent to the Licensor or its representatives, including but not limited to communication on electronic mailing lists, source code control systems, and issue tracking systems that are managed by, or on behalf of, the Licensor for the purpose of discussing and improving the Work, but excluding communication that is conspicuously marked or otherwise designated in writing by the copyright owner as "Not a Contribution."
+
+"Contributor" shall mean Licensor and any individual or Legal Entity on behalf of whom a Contribution has been received by Licensor and subsequently incorporated within the Work.
+
+2. Grant of Copyright License. Subject to the terms and conditions of this License, each Contributor hereby grants to You a perpetual, worldwide, non-exclusive, no-charge, royalty-free, irrevocable copyright license to reproduce, prepare Derivative Works of, publicly display, publicly perform, sublicense, and distribute the Work and such Derivative Works in Source or Object form.
+
+3. Grant of Patent License. Subject to the terms and conditions of this License, each Contributor hereby grants to You a perpetual, worldwide, non-exclusive, no-charge, royalty-free, irrevocable (except as stated in this section) patent license to make, have made, use, offer to sell, sell, import, and otherwise transfer the Work, where such license applies only to those patent claims licensable by such Contributor that are necessarily infringed by their Contribution(s) alone or by combination of their Contribution(s) with the Work to which such Contribution(s) was submitted. If You institute patent litigation against any entity (including a cross-claim or counterclaim in a lawsuit) alleging that the Work or a Contribution incorporated within the Work constitutes direct or contributory patent infringement, then any patent licenses granted to You under this License for that Work shall terminate as of the date such litigation is filed.
+
+4. Redistribution. You may reproduce and distribute copies of the Work or Derivative Works thereof in any medium, with or without modifications, and in Source or Object form, provided that You meet the following conditions:
+
+     (a) You must give any other recipients of the Work or Derivative Works a copy of this License; and
+
+     (b) You must cause any modified files to carry prominent notices stating that You changed the files; and
+
+     (c) You must retain, in the Source form of any Derivative Works that You distribute, all copyright, patent, trademark, and attribution notices from the Source form of the Work, excluding those notices that do not pertain to any part of the Derivative Works; and
+
+     (d) If the Work includes a "NOTICE" text file as part of its distribution, then any Derivative Works that You distribute must include a readable copy of the attribution notices contained within such NOTICE file, excluding those notices that do not pertain to any part of the Derivative Works, in at least one of the following places: within a NOTICE text file distributed as part of the Derivative Works; within the Source form or documentation, if provided along with the Derivative Works; or, within a display generated by the Derivative Works, if and wherever such third-party notices normally appear. The contents of the NOTICE file are for informational purposes only and do not modify the License. You may add Your own attribution notices within Derivative Works that You distribute, alongside or as an addendum to the NOTICE text from the Work, provided that such additional attribution notices cannot be construed as modifying the License.
+
+     You may add Your own copyright statement to Your modifications and may provide additional or different license terms and conditions for use, reproduction, or distribution of Your modifications, or for any such Derivative Works as a whole, provided Your use, reproduction, and distribution of the Work otherwise complies with the conditions stated in this License.
+
+5. Submission of Contributions. Unless You explicitly state otherwise, any Contribution intentionally submitted for inclusion in the Work by You to the Licensor shall be under the terms and conditions of this License, without any additional terms or conditions. Notwithstanding the above, nothing herein shall supersede or modify the terms of any separate license agreement you may have executed with Licensor regarding such Contributions.
+
+6. Trademarks. This License does not grant permission to use the trade names, trademarks, service marks, or product names of the Licensor, except as required for reasonable and customary use in describing the origin of the Work and reproducing the content of the NOTICE file.
+
+7. Disclaimer of Warranty. Unless required by applicable law or agreed to in writing, Licensor provides the Work (and each Contributor provides its Contributions) on an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied, including, without limitation, any warranties or conditions of TITLE, NON-INFRINGEMENT, MERCHANTABILITY, or FITNESS FOR A PARTICULAR PURPOSE. You are solely responsible for determining the appropriateness of using or redistributing the Work and assume any risks associated with Your exercise of permissions under this License.
+
+8. Limitation of Liability. In no event and under no legal theory, whether in tort (including negligence), contract, or otherwise, unless required by applicable law (such as deliberate and grossly negligent acts) or agreed to in writing, shall any Contributor be liable to You for damages, including any direct, indirect, special, incidental, or consequential damages of any character arising as a result of this License or out of the use or inability to use the Work (including but not limited to damages for loss of goodwill, work stoppage, computer failure or malfunction, or any and all other commercial damages or losses), even if such Contributor has been advised of the possibility of such damages.
+
+9. Accepting Warranty or Additional Liability. While redistributing the Work or Derivative Works thereof, You may choose to offer, and charge a fee for, acceptance of support, warranty, indemnity, or other liability obligations and/or rights consistent with this License. However, in accepting such obligations, You may act only on Your own behalf and on Your sole responsibility, not on behalf of any other Contributor, and only if You agree to indemnify, defend, and hold each Contributor harmless for any liability incurred by, or claims asserted against, such Contributor by reason of your accepting any such warranty or additional liability.
+
+END OF TERMS AND CONDITIONS
+
+APPENDIX: How to apply the Apache License to your work.
+
+To apply the Apache License to your work, attach the following boilerplate notice, with the fields enclosed by brackets "[]" replaced with your own identifying information. (Don't include the brackets!)  The text should be enclosed in the appropriate comment syntax for the file format. We also recommend that a file or class name and description of purpose be included on the same "printed page" as the copyright notice for easier identification within third-party archives.
+
+Copyright [yyyy] [name of copyright owner]
+
+Licensed under the Apache License, Version 2.0 (the "License");
+you may not use this file except in compliance with the License.
+You may obtain a copy of the License at
+
+http://www.apache.org/licenses/LICENSE-2.0
+
+Unless required by applicable law or agreed to in writing, software
+distributed under the License is distributed on an "AS IS" BASIS,
+WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+See the License for the specific language governing permissions and
+limitations under the License.

LICENSES/BSD-3-Clause.txt

@@ -0,0 +1,11 @@
+Copyright (c) <year> <owner>. 
+
+Redistribution and use in source and binary forms, with or without modification, are permitted provided that the following conditions are met:
+
+1. Redistributions of source code must retain the above copyright notice, this list of conditions and the following disclaimer.
+
+2. Redistributions in binary form must reproduce the above copyright notice, this list of conditions and the following disclaimer in the documentation and/or other materials provided with the distribution.
+
+3. Neither the name of the copyright holder nor the names of its contributors may be used to endorse or promote products derived from this software without specific prior written permission.
+
+THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.

LICENSES/GPL-3.0-only.txt

@@ -0,0 +1,232 @@
+GNU GENERAL PUBLIC LICENSE
+Version 3, 29 June 2007
+
+Copyright © 2007 Free Software Foundation, Inc. <http://fsf.org/>
+
+Everyone is permitted to copy and distribute verbatim copies of this license document, but changing it is not allowed.
+
+Preamble
+
+The GNU General Public License is a free, copyleft license for software and other kinds of works.
+
+The licenses for most software and other practical works are designed to take away your freedom to share and change the works. By contrast, the GNU General Public License is intended to guarantee your freedom to share and change all versions of a program--to make sure it remains free software for all its users. We, the Free Software Foundation, use the GNU General Public License for most of our software; it applies also to any other work released this way by its authors. You can apply it to your programs, too.
+
+When we speak of free software, we are referring to freedom, not price. Our General Public Licenses are designed to make sure that you have the freedom to distribute copies of free software (and charge for them if you wish), that you receive source code or can get it if you want it, that you can change the software or use pieces of it in new free programs, and that you know you can do these things.
+
+To protect your rights, we need to prevent others from denying you these rights or asking you to surrender the rights. Therefore, you have certain responsibilities if you distribute copies of the software, or if you modify it: responsibilities to respect the freedom of others.
+
+For example, if you distribute copies of such a program, whether gratis or for a fee, you must pass on to the recipients the same freedoms that you received. You must make sure that they, too, receive or can get the source code. And you must show them these terms so they know their rights.
+
+Developers that use the GNU GPL protect your rights with two steps: (1) assert copyright on the software, and (2) offer you this License giving you legal permission to copy, distribute and/or modify it.
+
+For the developers' and authors' protection, the GPL clearly explains that there is no warranty for this free software. For both users' and authors' sake, the GPL requires that modified versions be marked as changed, so that their problems will not be attributed erroneously to authors of previous versions.
+
+Some devices are designed to deny users access to install or run modified versions of the software inside them, although the manufacturer can do so. This is fundamentally incompatible with the aim of protecting users' freedom to change the software. The systematic pattern of such abuse occurs in the area of products for individuals to use, which is precisely where it is most unacceptable. Therefore, we have designed this version of the GPL to prohibit the practice for those products. If such problems arise substantially in other domains, we stand ready to extend this provision to those domains in future versions of the GPL, as needed to protect the freedom of users.
+
+Finally, every program is threatened constantly by software patents. States should not allow patents to restrict development and use of software on general-purpose computers, but in those that do, we wish to avoid the special danger that patents applied to a free program could make it effectively proprietary. To prevent this, the GPL assures that patents cannot be used to render the program non-free.
+
+The precise terms and conditions for copying, distribution and modification follow.
+
+TERMS AND CONDITIONS
+
+0. Definitions.
+
+“This License” refers to version 3 of the GNU General Public License.
+
+“Copyright” also means copyright-like laws that apply to other kinds of works, such as semiconductor masks.
+
+“The Program” refers to any copyrightable work licensed under this License. Each licensee is addressed as “you”. “Licensees” and “recipients” may be individuals or organizations.
+
+To “modify” a work means to copy from or adapt all or part of the work in a fashion requiring copyright permission, other than the making of an exact copy. The resulting work is called a “modified version” of the earlier work or a work “based on” the earlier work.
+
+A “covered work” means either the unmodified Program or a work based on the Program.
+
+To “propagate” a work means to do anything with it that, without permission, would make you directly or secondarily liable for infringement under applicable copyright law, except executing it on a computer or modifying a private copy. Propagation includes copying, distribution (with or without modification), making available to the public, and in some countries other activities as well.
+
+To “convey” a work means any kind of propagation that enables other parties to make or receive copies. Mere interaction with a user through a computer network, with no transfer of a copy, is not conveying.
+
+An interactive user interface displays “Appropriate Legal Notices” to the extent that it includes a convenient and prominently visible feature that (1) displays an appropriate copyright notice, and (2) tells the user that there is no warranty for the work (except to the extent that warranties are provided), that licensees may convey the work under this License, and how to view a copy of this License. If the interface presents a list of user commands or options, such as a menu, a prominent item in the list meets this criterion.
+
+1. Source Code.
+The “source code” for a work means the preferred form of the work for making modifications to it. “Object code” means any non-source form of a work.
+
+A “Standard Interface” means an interface that either is an official standard defined by a recognized standards body, or, in the case of interfaces specified for a particular programming language, one that is widely used among developers working in that language.
+
+The “System Libraries” of an executable work include anything, other than the work as a whole, that (a) is included in the normal form of packaging a Major Component, but which is not part of that Major Component, and (b) serves only to enable use of the work with that Major Component, or to implement a Standard Interface for which an implementation is available to the public in source code form. A “Major Component”, in this context, means a major essential component (kernel, window system, and so on) of the specific operating system (if any) on which the executable work runs, or a compiler used to produce the work, or an object code interpreter used to run it.
+
+The “Corresponding Source” for a work in object code form means all the source code needed to generate, install, and (for an executable work) run the object code and to modify the work, including scripts to control those activities. However, it does not include the work's System Libraries, or general-purpose tools or generally available free programs which are used unmodified in performing those activities but which are not part of the work. For example, Corresponding Source includes interface definition files associated with source files for the work, and the source code for shared libraries and dynamically linked subprograms that the work is specifically designed to require, such as by intimate data communication or control flow between those subprograms and other parts of the work.
+
+The Corresponding Source need not include anything that users can regenerate automatically from other parts of the Corresponding Source.
+
+The Corresponding Source for a work in source code form is that same work.
+
+2. Basic Permissions.
+All rights granted under this License are granted for the term of copyright on the Program, and are irrevocable provided the stated conditions are met. This License explicitly affirms your unlimited permission to run the unmodified Program. The output from running a covered work is covered by this License only if the output, given its content, constitutes a covered work. This License acknowledges your rights of fair use or other equivalent, as provided by copyright law.
+
+You may make, run and propagate covered works that you do not convey, without conditions so long as your license otherwise remains in force. You may convey covered works to others for the sole purpose of having them make modifications exclusively for you, or provide you with facilities for running those works, provided that you comply with the terms of this License in conveying all material for which you do not control copyright. Those thus making or running the covered works for you must do so exclusively on your behalf, under your direction and control, on terms that prohibit them from making any copies of your copyrighted material outside their relationship with you.
+
+Conveying under any other circumstances is permitted solely under the conditions stated below. Sublicensing is not allowed; section 10 makes it unnecessary.
+
+3. Protecting Users' Legal Rights From Anti-Circumvention Law.
+No covered work shall be deemed part of an effective technological measure under any applicable law fulfilling obligations under article 11 of the WIPO copyright treaty adopted on 20 December 1996, or similar laws prohibiting or restricting circumvention of such measures.
+
+When you convey a covered work, you waive any legal power to forbid circumvention of technological measures to the extent such circumvention is effected by exercising rights under this License with respect to the covered work, and you disclaim any intention to limit operation or modification of the work as a means of enforcing, against the work's users, your or third parties' legal rights to forbid circumvention of technological measures.
+
+4. Conveying Verbatim Copies.
+You may convey verbatim copies of the Program's source code as you receive it, in any medium, provided that you conspicuously and appropriately publish on each copy an appropriate copyright notice; keep intact all notices stating that this License and any non-permissive terms added in accord with section 7 apply to the code; keep intact all notices of the absence of any warranty; and give all recipients a copy of this License along with the Program.
+
+You may charge any price or no price for each copy that you convey, and you may offer support or warranty protection for a fee.
+
+5. Conveying Modified Source Versions.
+You may convey a work based on the Program, or the modifications to produce it from the Program, in the form of source code under the terms of section 4, provided that you also meet all of these conditions:
+
+     a) The work must carry prominent notices stating that you modified it, and giving a relevant date.
+
+     b) The work must carry prominent notices stating that it is released under this License and any conditions added under section 7. This requirement modifies the requirement in section 4 to “keep intact all notices”.
+
+     c) You must license the entire work, as a whole, under this License to anyone who comes into possession of a copy. This License will therefore apply, along with any applicable section 7 additional terms, to the whole of the work, and all its parts, regardless of how they are packaged. This License gives no permission to license the work in any other way, but it does not invalidate such permission if you have separately received it.
+
+     d) If the work has interactive user interfaces, each must display Appropriate Legal Notices; however, if the Program has interactive interfaces that do not display Appropriate Legal Notices, your work need not make them do so.
+
+A compilation of a covered work with other separate and independent works, which are not by their nature extensions of the covered work, and which are not combined with it such as to form a larger program, in or on a volume of a storage or distribution medium, is called an “aggregate” if the compilation and its resulting copyright are not used to limit the access or legal rights of the compilation's users beyond what the individual works permit. Inclusion of a covered work in an aggregate does not cause this License to apply to the other parts of the aggregate.
+
+6. Conveying Non-Source Forms.
+You may convey a covered work in object code form under the terms of sections 4 and 5, provided that you also convey the machine-readable Corresponding Source under the terms of this License, in one of these ways:
+
+     a) Convey the object code in, or embodied in, a physical product (including a physical distribution medium), accompanied by the Corresponding Source fixed on a durable physical medium customarily used for software interchange.
+
+     b) Convey the object code in, or embodied in, a physical product (including a physical distribution medium), accompanied by a written offer, valid for at least three years and valid for as long as you offer spare parts or customer support for that product model, to give anyone who possesses the object code either (1) a copy of the Corresponding Source for all the software in the product that is covered by this License, on a durable physical medium customarily used for software interchange, for a price no more than your reasonable cost of physically performing this conveying of source, or (2) access to copy the Corresponding Source from a network server at no charge.
+
+     c) Convey individual copies of the object code with a copy of the written offer to provide the Corresponding Source. This alternative is allowed only occasionally and noncommercially, and only if you received the object code with such an offer, in accord with subsection 6b.
+
+     d) Convey the object code by offering access from a designated place (gratis or for a charge), and offer equivalent access to the Corresponding Source in the same way through the same place at no further charge. You need not require recipients to copy the Corresponding Source along with the object code. If the place to copy the object code is a network server, the Corresponding Source may be on a different server (operated by you or a third party) that supports equivalent copying facilities, provided you maintain clear directions next to the object code saying where to find the Corresponding Source. Regardless of what server hosts the Corresponding Source, you remain obligated to ensure that it is available for as long as needed to satisfy these requirements.
+
+     e) Convey the object code using peer-to-peer transmission, provided you inform other peers where the object code and Corresponding Source of the work are being offered to the general public at no charge under subsection 6d.
+
+A separable portion of the object code, whose source code is excluded from the Corresponding Source as a System Library, need not be included in conveying the object code work.
+
+A “User Product” is either (1) a “consumer product”, which means any tangible personal property which is normally used for personal, family, or household purposes, or (2) anything designed or sold for incorporation into a dwelling. In determining whether a product is a consumer product, doubtful cases shall be resolved in favor of coverage. For a particular product received by a particular user, “normally used” refers to a typical or common use of that class of product, regardless of the status of the particular user or of the way in which the particular user actually uses, or expects or is expected to use, the product. A product is a consumer product regardless of whether the product has substantial commercial, industrial or non-consumer uses, unless such uses represent the only significant mode of use of the product.
+
+“Installation Information” for a User Product means any methods, procedures, authorization keys, or other information required to install and execute modified versions of a covered work in that User Product from a modified version of its Corresponding Source. The information must suffice to ensure that the continued functioning of the modified object code is in no case prevented or interfered with solely because modification has been made.
+
+If you convey an object code work under this section in, or with, or specifically for use in, a User Product, and the conveying occurs as part of a transaction in which the right of possession and use of the User Product is transferred to the recipient in perpetuity or for a fixed term (regardless of how the transaction is characterized), the Corresponding Source conveyed under this section must be accompanied by the Installation Information. But this requirement does not apply if neither you nor any third party retains the ability to install modified object code on the User Product (for example, the work has been installed in ROM).
+
+The requirement to provide Installation Information does not include a requirement to continue to provide support service, warranty, or updates for a work that has been modified or installed by the recipient, or for the User Product in which it has been modified or installed. Access to a network may be denied when the modification itself materially and adversely affects the operation of the network or violates the rules and protocols for communication across the network.
+
+Corresponding Source conveyed, and Installation Information provided, in accord with this section must be in a format that is publicly documented (and with an implementation available to the public in source code form), and must require no special password or key for unpacking, reading or copying.
+
+7. Additional Terms.
+“Additional permissions” are terms that supplement the terms of this License by making exceptions from one or more of its conditions. Additional permissions that are applicable to the entire Program shall be treated as though they were included in this License, to the extent that they are valid under applicable law. If additional permissions apply only to part of the Program, that part may be used separately under those permissions, but the entire Program remains governed by this License without regard to the additional permissions.
+
+When you convey a copy of a covered work, you may at your option remove any additional permissions from that copy, or from any part of it. (Additional permissions may be written to require their own removal in certain cases when you modify the work.) You may place additional permissions on material, added by you to a covered work, for which you have or can give appropriate copyright permission.
+
+Notwithstanding any other provision of this License, for material you add to a covered work, you may (if authorized by the copyright holders of that material) supplement the terms of this License with terms:
+
+     a) Disclaiming warranty or limiting liability differently from the terms of sections 15 and 16 of this License; or
+
+     b) Requiring preservation of specified reasonable legal notices or author attributions in that material or in the Appropriate Legal Notices displayed by works containing it; or
+
+     c) Prohibiting misrepresentation of the origin of that material, or requiring that modified versions of such material be marked in reasonable ways as different from the original version; or
+
+     d) Limiting the use for publicity purposes of names of licensors or authors of the material; or
+
+     e) Declining to grant rights under trademark law for use of some trade names, trademarks, or service marks; or
+
+     f) Requiring indemnification of licensors and authors of that material by anyone who conveys the material (or modified versions of it) with contractual assumptions of liability to the recipient, for any liability that these contractual assumptions directly impose on those licensors and authors.
+
+All other non-permissive additional terms are considered “further restrictions” within the meaning of section 10. If the Program as you received it, or any part of it, contains a notice stating that it is governed by this License along with a term that is a further restriction, you may remove that term. If a license document contains a further restriction but permits relicensing or conveying under this License, you may add to a covered work material governed by the terms of that license document, provided that the further restriction does not survive such relicensing or conveying.
+
+If you add terms to a covered work in accord with this section, you must place, in the relevant source files, a statement of the additional terms that apply to those files, or a notice indicating where to find the applicable terms.
+
+Additional terms, permissive or non-permissive, may be stated in the form of a separately written license, or stated as exceptions; the above requirements apply either way.
+
+8. Termination.
+You may not propagate or modify a covered work except as expressly provided under this License. Any attempt otherwise to propagate or modify it is void, and will automatically terminate your rights under this License (including any patent licenses granted under the third paragraph of section 11).
+
+However, if you cease all violation of this License, then your license from a particular copyright holder is reinstated (a) provisionally, unless and until the copyright holder explicitly and finally terminates your license, and (b) permanently, if the copyright holder fails to notify you of the violation by some reasonable means prior to 60 days after the cessation.
+
+Moreover, your license from a particular copyright holder is reinstated permanently if the copyright holder notifies you of the violation by some reasonable means, this is the first time you have received notice of violation of this License (for any work) from that copyright holder, and you cure the violation prior to 30 days after your receipt of the notice.
+
+Termination of your rights under this section does not terminate the licenses of parties who have received copies or rights from you under this License. If your rights have been terminated and not permanently reinstated, you do not qualify to receive new licenses for the same material under section 10.
+
+9. Acceptance Not Required for Having Copies.
+You are not required to accept this License in order to receive or run a copy of the Program. Ancillary propagation of a covered work occurring solely as a consequence of using peer-to-peer transmission to receive a copy likewise does not require acceptance. However, nothing other than this License grants you permission to propagate or modify any covered work. These actions infringe copyright if you do not accept this License. Therefore, by modifying or propagating a covered work, you indicate your acceptance of this License to do so.
+
+10. Automatic Licensing of Downstream Recipients.
+Each time you convey a covered work, the recipient automatically receives a license from the original licensors, to run, modify and propagate that work, subject to this License. You are not responsible for enforcing compliance by third parties with this License.
+
+An “entity transaction” is a transaction transferring control of an organization, or substantially all assets of one, or subdividing an organization, or merging organizations. If propagation of a covered work results from an entity transaction, each party to that transaction who receives a copy of the work also receives whatever licenses to the work the party's predecessor in interest had or could give under the previous paragraph, plus a right to possession of the Corresponding Source of the work from the predecessor in interest, if the predecessor has it or can get it with reasonable efforts.
+
+You may not impose any further restrictions on the exercise of the rights granted or affirmed under this License. For example, you may not impose a license fee, royalty, or other charge for exercise of rights granted under this License, and you may not initiate litigation (including a cross-claim or counterclaim in a lawsuit) alleging that any patent claim is infringed by making, using, selling, offering for sale, or importing the Program or any portion of it.
+
+11. Patents.
+A “contributor” is a copyright holder who authorizes use under this License of the Program or a work on which the Program is based. The work thus licensed is called the contributor's “contributor version”.
+
+A contributor's “essential patent claims” are all patent claims owned or controlled by the contributor, whether already acquired or hereafter acquired, that would be infringed by some manner, permitted by this License, of making, using, or selling its contributor version, but do not include claims that would be infringed only as a consequence of further modification of the contributor version. For purposes of this definition, “control” includes the right to grant patent sublicenses in a manner consistent with the requirements of this License.
+
+Each contributor grants you a non-exclusive, worldwide, royalty-free patent license under the contributor's essential patent claims, to make, use, sell, offer for sale, import and otherwise run, modify and propagate the contents of its contributor version.
+
+In the following three paragraphs, a “patent license” is any express agreement or commitment, however denominated, not to enforce a patent (such as an express permission to practice a patent or covenant not to sue for patent infringement). To “grant” such a patent license to a party means to make such an agreement or commitment not to enforce a patent against the party.
+
+If you convey a covered work, knowingly relying on a patent license, and the Corresponding Source of the work is not available for anyone to copy, free of charge and under the terms of this License, through a publicly available network server or other readily accessible means, then you must either (1) cause the Corresponding Source to be so available, or (2) arrange to deprive yourself of the benefit of the patent license for this particular work, or (3) arrange, in a manner consistent with the requirements of this License, to extend the patent license to downstream recipients. “Knowingly relying” means you have actual knowledge that, but for the patent license, your conveying the covered work in a country, or your recipient's use of the covered work in a country, would infringe one or more identifiable patents in that country that you have reason to believe are valid.
+
+If, pursuant to or in connection with a single transaction or arrangement, you convey, or propagate by procuring conveyance of, a covered work, and grant a patent license to some of the parties receiving the covered work authorizing them to use, propagate, modify or convey a specific copy of the covered work, then the patent license you grant is automatically extended to all recipients of the covered work and works based on it.
+
+A patent license is “discriminatory” if it does not include within the scope of its coverage, prohibits the exercise of, or is conditioned on the non-exercise of one or more of the rights that are specifically granted under this License. You may not convey a covered work if you are a party to an arrangement with a third party that is in the business of distributing software, under which you make payment to the third party based on the extent of your activity of conveying the work, and under which the third party grants, to any of the parties who would receive the covered work from you, a discriminatory patent license (a) in connection with copies of the covered work conveyed by you (or copies made from those copies), or (b) primarily for and in connection with specific products or compilations that contain the covered work, unless you entered into that arrangement, or that patent license was granted, prior to 28 March 2007.
+
+Nothing in this License shall be construed as excluding or limiting any implied license or other defenses to infringement that may otherwise be available to you under applicable patent law.
+
+12. No Surrender of Others' Freedom.
+If conditions are imposed on you (whether by court order, agreement or otherwise) that contradict the conditions of this License, they do not excuse you from the conditions of this License. If you cannot convey a covered work so as to satisfy simultaneously your obligations under this License and any other pertinent obligations, then as a consequence you may not convey it at all. For example, if you agree to terms that obligate you to collect a royalty for further conveying from those to whom you convey the Program, the only way you could satisfy both those terms and this License would be to refrain entirely from conveying the Program.
+
+13. Use with the GNU Affero General Public License.
+Notwithstanding any other provision of this License, you have permission to link or combine any covered work with a work licensed under version 3 of the GNU Affero General Public License into a single combined work, and to convey the resulting work. The terms of this License will continue to apply to the part which is the covered work, but the special requirements of the GNU Affero General Public License, section 13, concerning interaction through a network will apply to the combination as such.
+
+14. Revised Versions of this License.
+The Free Software Foundation may publish revised and/or new versions of the GNU General Public License from time to time. Such new versions will be similar in spirit to the present version, but may differ in detail to address new problems or concerns.
+
+Each version is given a distinguishing version number. If the Program specifies that a certain numbered version of the GNU General Public License “or any later version” applies to it, you have the option of following the terms and conditions either of that numbered version or of any later version published by the Free Software Foundation. If the Program does not specify a version number of the GNU General Public License, you may choose any version ever published by the Free Software Foundation.
+
+If the Program specifies that a proxy can decide which future versions of the GNU General Public License can be used, that proxy's public statement of acceptance of a version permanently authorizes you to choose that version for the Program.
+
+Later license versions may give you additional or different permissions. However, no additional obligations are imposed on any author or copyright holder as a result of your choosing to follow a later version.
+
+15. Disclaimer of Warranty.
+THERE IS NO WARRANTY FOR THE PROGRAM, TO THE EXTENT PERMITTED BY APPLICABLE LAW. EXCEPT WHEN OTHERWISE STATED IN WRITING THE COPYRIGHT HOLDERS AND/OR OTHER PARTIES PROVIDE THE PROGRAM “AS IS” WITHOUT WARRANTY OF ANY KIND, EITHER EXPRESSED OR IMPLIED, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE. THE ENTIRE RISK AS TO THE QUALITY AND PERFORMANCE OF THE PROGRAM IS WITH YOU. SHOULD THE PROGRAM PROVE DEFECTIVE, YOU ASSUME THE COST OF ALL NECESSARY SERVICING, REPAIR OR CORRECTION.
+
+16. Limitation of Liability.
+IN NO EVENT UNLESS REQUIRED BY APPLICABLE LAW OR AGREED TO IN WRITING WILL ANY COPYRIGHT HOLDER, OR ANY OTHER PARTY WHO MODIFIES AND/OR CONVEYS THE PROGRAM AS PERMITTED ABOVE, BE LIABLE TO YOU FOR DAMAGES, INCLUDING ANY GENERAL, SPECIAL, INCIDENTAL OR CONSEQUENTIAL DAMAGES ARISING OUT OF THE USE OR INABILITY TO USE THE PROGRAM (INCLUDING BUT NOT LIMITED TO LOSS OF DATA OR DATA BEING RENDERED INACCURATE OR LOSSES SUSTAINED BY YOU OR THIRD PARTIES OR A FAILURE OF THE PROGRAM TO OPERATE WITH ANY OTHER PROGRAMS), EVEN IF SUCH HOLDER OR OTHER PARTY HAS BEEN ADVISED OF THE POSSIBILITY OF SUCH DAMAGES.
+
+17. Interpretation of Sections 15 and 16.
+If the disclaimer of warranty and limitation of liability provided above cannot be given local legal effect according to their terms, reviewing courts shall apply local law that most closely approximates an absolute waiver of all civil liability in connection with the Program, unless a warranty or assumption of liability accompanies a copy of the Program in return for a fee.
+
+END OF TERMS AND CONDITIONS
+
+How to Apply These Terms to Your New Programs
+
+If you develop a new program, and you want it to be of the greatest possible use to the public, the best way to achieve this is to make it free software which everyone can redistribute and change under these terms.
+
+To do so, attach the following notices to the program. It is safest to attach them to the start of each source file to most effectively state the exclusion of warranty; and each file should have at least the “copyright” line and a pointer to where the full notice is found.
+
+     <one line to give the program's name and a brief idea of what it does.>
+     Copyright (C) <year>  <name of author>
+
+     This program is free software: you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software Foundation, either version 3 of the License, or (at your option) any later version.
+
+     This program is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License for more details.
+
+     You should have received a copy of the GNU General Public License along with this program.  If not, see <http://www.gnu.org/licenses/>.
+
+Also add information on how to contact you by electronic and paper mail.
+
+If the program does terminal interaction, make it output a short notice like this when it starts in an interactive mode:
+
+     <program>  Copyright (C) <year>  <name of author>
+     This program comes with ABSOLUTELY NO WARRANTY; for details type `show w'.
+     This is free software, and you are welcome to redistribute it under certain conditions; type `show c' for details.
+
+The hypothetical commands `show w' and `show c' should show the appropriate parts of the General Public License. Of course, your program's commands might be different; for a GUI interface, you would use an “about box”.
+
+You should also get your employer (if you work as a programmer) or school, if any, to sign a “copyright disclaimer” for the program, if necessary. For more information on this, and how to apply and follow the GNU GPL, see <http://www.gnu.org/licenses/>.
+
+The GNU General Public License does not permit incorporating your program into proprietary programs. If your program is a subroutine library, you may consider it more useful to permit linking proprietary applications with the library. If this is what you want to do, use the GNU Lesser General Public License instead of this License. But first, please read <http://www.gnu.org/philosophy/why-not-lgpl.html>.

LICENSES/MIT.txt

@@ -0,0 +1,9 @@
+MIT License
+
+Copyright (c) <year> <copyright holders>
+
+Permission is hereby granted, free of charge, to any person obtaining a copy of this software and associated documentation files (the "Software"), to deal in the Software without restriction, including without limitation the rights to use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of the Software, and to permit persons to whom the Software is furnished to do so, subject to the following conditions:
+
+The above copyright notice and this permission notice shall be included in all copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.

MODULE.bazel

@@ -0,0 +1,7 @@
+module(
+    name = "nlohmann_json",
+    compatibility_level = 1,
+)
+
+bazel_dep(name = "rules_cc", version = "0.0.17")
+bazel_dep(name = "rules_license", version = "1.0.0")

Makefile

@@ -4,9 +4,6 @@
 # configuration
 ##########################################################################
 
-# directory to recent compiler binaries
-COMPILER_DIR=/usr/local/opt/llvm/bin
-
 # find GNU sed to use `-i` parameter
 SED:=$(shell command -v gsed || which sed)
 
@@ -18,8 +15,12 @@ SED:=$(shell command -v gsed || which sed)
 # the list of sources in the include folder
 SRCS=$(shell find include -type f | sort)
 
-# the single header (amalgamated from the source files)
+# the list of sources in the tests folder
+TESTS_SRCS=$(shell find tests -type f \( -name '*.hpp' -o -name '*.cpp' -o -name '*.cu' \) -not -path 'tests/thirdparty/*' -not -path 'tests/abi/include/nlohmann/*' | sort)
+
+# the single headers (amalgamated from the source files)
 AMALGAMATED_FILE=single_include/nlohmann/json.hpp
+AMALGAMATED_FWD_FILE=single_include/nlohmann/json_fwd.hpp
 
 
 ##########################################################################
@@ -28,7 +29,7 @@ AMALGAMATED_FILE=single_include/nlohmann/json.hpp
 
 # main target
 all:
-	@echo "amalgamate - amalgamate file single_include/nlohmann/json.hpp from the include/nlohmann sources"
+	@echo "amalgamate - amalgamate files single_include/nlohmann/json{,_fwd}.hpp from the include/nlohmann sources"
 	@echo "ChangeLog.md - generate ChangeLog file"
 	@echo "check-amalgamation - check whether sources have been amalgamated"
 	@echo "clean - remove built files"
@@ -42,15 +43,6 @@ all:
 	@echo "run_benchmarks - build and run benchmarks"
 
 
-##########################################################################
-# documentation tests
-##########################################################################
-
-# compile example files and check output
-doctest:
-	$(MAKE) check_output -C doc
-
-
 ##########################################################################
 # benchmarks
 ##########################################################################
@@ -58,10 +50,11 @@ doctest:
 run_benchmarks:
 	rm -fr cmake-build-benchmarks
 	mkdir cmake-build-benchmarks
-	cd cmake-build-benchmarks ; cmake ../benchmarks -GNinja -DCMAKE_BUILD_TYPE=Release -DJSON_BuildTests=On
+	cd cmake-build-benchmarks ; cmake ../tests/benchmarks -GNinja -DCMAKE_BUILD_TYPE=Release
 	cd cmake-build-benchmarks ; ninja
 	cd cmake-build-benchmarks ; ./json_benchmarks
 
+
 ##########################################################################
 # fuzzing
 ##########################################################################
@@ -70,41 +63,41 @@ run_benchmarks:
 fuzz_testing:
 	rm -fr fuzz-testing
 	mkdir -p fuzz-testing fuzz-testing/testcases fuzz-testing/out
-	$(MAKE) parse_afl_fuzzer -C test CXX=afl-clang++
-	mv test/parse_afl_fuzzer fuzz-testing/fuzzer
-	find test/data/json_tests -size -5k -name *json | xargs -I{} cp "{}" fuzz-testing/testcases
+	$(MAKE) parse_afl_fuzzer -C tests CXX=afl-clang++
+	mv tests/parse_afl_fuzzer fuzz-testing/fuzzer
+	find tests/data/json_tests -size -5k -name *json | xargs -I{} cp "{}" fuzz-testing/testcases
 	@echo "Execute: afl-fuzz -i fuzz-testing/testcases -o fuzz-testing/out fuzz-testing/fuzzer"
 
 fuzz_testing_bson:
 	rm -fr fuzz-testing
 	mkdir -p fuzz-testing fuzz-testing/testcases fuzz-testing/out
-	$(MAKE) parse_bson_fuzzer -C test CXX=afl-clang++
-	mv test/parse_bson_fuzzer fuzz-testing/fuzzer
-	find test/data -size -5k -name *.bson | xargs -I{} cp "{}" fuzz-testing/testcases
+	$(MAKE) parse_bson_fuzzer -C tests CXX=afl-clang++
+	mv tests/parse_bson_fuzzer fuzz-testing/fuzzer
+	find tests/data -size -5k -name *.bson | xargs -I{} cp "{}" fuzz-testing/testcases
 	@echo "Execute: afl-fuzz -i fuzz-testing/testcases -o fuzz-testing/out fuzz-testing/fuzzer"
 
 fuzz_testing_cbor:
 	rm -fr fuzz-testing
 	mkdir -p fuzz-testing fuzz-testing/testcases fuzz-testing/out
-	$(MAKE) parse_cbor_fuzzer -C test CXX=afl-clang++
-	mv test/parse_cbor_fuzzer fuzz-testing/fuzzer
-	find test/data -size -5k -name *.cbor | xargs -I{} cp "{}" fuzz-testing/testcases
+	$(MAKE) parse_cbor_fuzzer -C tests CXX=afl-clang++
+	mv tests/parse_cbor_fuzzer fuzz-testing/fuzzer
+	find tests/data -size -5k -name *.cbor | xargs -I{} cp "{}" fuzz-testing/testcases
 	@echo "Execute: afl-fuzz -i fuzz-testing/testcases -o fuzz-testing/out fuzz-testing/fuzzer"
 
 fuzz_testing_msgpack:
 	rm -fr fuzz-testing
 	mkdir -p fuzz-testing fuzz-testing/testcases fuzz-testing/out
-	$(MAKE) parse_msgpack_fuzzer -C test CXX=afl-clang++
-	mv test/parse_msgpack_fuzzer fuzz-testing/fuzzer
-	find test/data -size -5k -name *.msgpack | xargs -I{} cp "{}" fuzz-testing/testcases
+	$(MAKE) parse_msgpack_fuzzer -C tests CXX=afl-clang++
+	mv tests/parse_msgpack_fuzzer fuzz-testing/fuzzer
+	find tests/data -size -5k -name *.msgpack | xargs -I{} cp "{}" fuzz-testing/testcases
 	@echo "Execute: afl-fuzz -i fuzz-testing/testcases -o fuzz-testing/out fuzz-testing/fuzzer"
 
 fuzz_testing_ubjson:
 	rm -fr fuzz-testing
 	mkdir -p fuzz-testing fuzz-testing/testcases fuzz-testing/out
-	$(MAKE) parse_ubjson_fuzzer -C test CXX=afl-clang++
-	mv test/parse_ubjson_fuzzer fuzz-testing/fuzzer
-	find test/data -size -5k -name *.ubjson | xargs -I{} cp "{}" fuzz-testing/testcases
+	$(MAKE) parse_ubjson_fuzzer -C tests CXX=afl-clang++
+	mv tests/parse_ubjson_fuzzer fuzz-testing/fuzzer
+	find tests/data -size -5k -name *.ubjson | xargs -I{} cp "{}" fuzz-testing/testcases
 	@echo "Execute: afl-fuzz -i fuzz-testing/testcases -o fuzz-testing/out fuzz-testing/fuzzer"
 
 fuzzing-start:
@@ -135,53 +128,51 @@ pvs_studio:
 	cd cmake-build-pvs-studio ; plog-converter -a'GA:1,2;64:1;CS' -t fullhtml PVS-Studio.log -o pvs
 	open cmake-build-pvs-studio/pvs/index.html
 
+
 ##########################################################################
 # Code format and source amalgamation
 ##########################################################################
 
+ASTYLE=tools/astyle/venv/bin/astyle
+
+install_astyle:
+	@test -d tools/astyle/venv || python3 -mvenv tools/astyle/venv ; tools/astyle/venv/bin/pip3 install --quiet --upgrade pip
+	@test -f $(ASTYLE) || tools/astyle/venv/bin/pip3 install --quiet -r tools/astyle/requirements.txt
+	@$(ASTYLE) --version
+
 # call the Artistic Style pretty printer on all source files
-pretty:
-	astyle \
-		--style=allman \
-		--indent=spaces=4 \
-		--indent-modifiers \
-	    --indent-switches \
-	    --indent-preproc-block \
-	    --indent-preproc-define \
-	    --indent-col1-comments \
-	    --pad-oper \
-	    --pad-header \
-	    --align-pointer=type \
-	    --align-reference=type \
-	    --add-brackets \
-	    --convert-tabs \
-	    --close-templates \
-	    --lineend=linux \
-	    --preserve-date \
-	    --suffix=none \
-	    --formatted \
-	   $(SRCS) $(AMALGAMATED_FILE) test/src/*.cpp test/src/*.hpp benchmarks/src/benchmarks.cpp doc/examples/*.cpp
+pretty: install_astyle
+	$(ASTYLE) --project=tools/astyle/.astylerc $(SRCS) $(TESTS_SRCS) $(AMALGAMATED_FILE) $(AMALGAMATED_FWD_FILE) docs/mkdocs/docs/examples/*.cpp
 
 # call the Clang-Format on all source files
 pretty_format:
-	for FILE in $(SRCS) $(AMALGAMATED_FILE) test/src/*.cpp test/src/*.hpp benchmarks/src/benchmarks.cpp doc/examples/*.cpp; do echo $$FILE; clang-format -i $$FILE; done
+	for FILE in $(SRCS) $(TESTS_SRCS) $(AMALGAMATED_FILE) docs/mkdocs/docs/examples/*.cpp; do echo $$FILE; clang-format -i $$FILE; done
 
-# create single header file
-amalgamate: $(AMALGAMATED_FILE)
-
-# call the amalgamation tool and pretty print
-$(AMALGAMATED_FILE): $(SRCS)
-	third_party/amalgamate/amalgamate.py -c third_party/amalgamate/config.json -s . --verbose=yes
+# create single header files and pretty print
+amalgamate: $(AMALGAMATED_FILE) $(AMALGAMATED_FWD_FILE)
 	$(MAKE) pretty
 
+# call the amalgamation tool for json.hpp
+$(AMALGAMATED_FILE): $(SRCS)
+	tools/amalgamate/amalgamate.py -c tools/amalgamate/config_json.json -s . --verbose=yes
+
+# call the amalgamation tool for json_fwd.hpp
+$(AMALGAMATED_FWD_FILE): $(SRCS)
+	tools/amalgamate/amalgamate.py -c tools/amalgamate/config_json_fwd.json -s . --verbose=yes
+
 # check if file single_include/nlohmann/json.hpp has been amalgamated from the nlohmann sources
 # Note: this target is called by Travis
 check-amalgamation:
 	@mv $(AMALGAMATED_FILE) $(AMALGAMATED_FILE)~
+	@mv $(AMALGAMATED_FWD_FILE) $(AMALGAMATED_FWD_FILE)~
 	@$(MAKE) amalgamate
 	@diff $(AMALGAMATED_FILE) $(AMALGAMATED_FILE)~ || (echo "===================================================================\n  Amalgamation required! Please read the contribution guidelines\n  in file .github/CONTRIBUTING.md.\n===================================================================" ; mv $(AMALGAMATED_FILE)~ $(AMALGAMATED_FILE) ; false)
+	@diff $(AMALGAMATED_FWD_FILE) $(AMALGAMATED_FWD_FILE)~ || (echo "===================================================================\n  Amalgamation required! Please read the contribution guidelines\n  in file .github/CONTRIBUTING.md.\n===================================================================" ; mv $(AMALGAMATED_FWD_FILE)~ $(AMALGAMATED_FWD_FILE) ; false)
 	@mv $(AMALGAMATED_FILE)~ $(AMALGAMATED_FILE)
+	@mv $(AMALGAMATED_FWD_FILE)~ $(AMALGAMATED_FWD_FILE)
 
+BUILD.bazel: $(SRCS)
+	cmake -P cmake/scripts/gen_bazel_build_file.cmake
 
 ##########################################################################
 # ChangeLog
@@ -203,20 +194,31 @@ ChangeLog.md:
 # Release files
 ##########################################################################
 
-# Create the files for a release and add signatures and hashes. We use `-X` to make the resulting ZIP file
-# reproducible, see <https://content.pivotal.io/blog/barriers-to-deterministic-reproducible-zip-files>.
+# Create a tar.xz archive that contains sufficient files to be used as CMake project (e.g., using FetchContent). The
+# archive is created according to the advices of <https://reproducible-builds.org/docs/archives/>.
+json.tar.xz:
+	mkdir json
+	rsync -R $(shell find LICENSE.MIT nlohmann_json.natvis CMakeLists.txt cmake/*.in include single_include -type f) json
+	gtar --sort=name --mtime="@$(shell git log -1 --pretty=%ct)" --owner=0 --group=0 --numeric-owner --pax-option=exthdr.name=%d/PaxHeaders/%f,delete=atime,delete=ctime --create --file - json | xz --compress -9e --threads=2 - > json.tar.xz
+	rm -fr json
 
-release:
+# We use `-X` to make the resulting ZIP file reproducible, see
+# <https://content.pivotal.io/blog/barriers-to-deterministic-reproducible-zip-files>.
+include.zip: BUILD.bazel
+	zip -9 --recurse-paths -X include.zip $(SRCS) $(AMALGAMATED_FILE) $(AMALGAMATED_FWD_FILE) BUILD.bazel WORKSPACE.bazel meson.build LICENSE.MIT
+
+# Create the files for a release and add signatures and hashes.
+release: include.zip json.tar.xz
 	rm -fr release_files
 	mkdir release_files
-	zip -9 --recurse-paths -X include.zip $(SRCS) $(AMALGAMATED_FILE) meson.build LICENSE.MIT
 	gpg --armor --detach-sig include.zip
-	mv include.zip include.zip.asc release_files
 	gpg --armor --detach-sig $(AMALGAMATED_FILE)
+	gpg --armor --detach-sig $(AMALGAMATED_FWD_FILE)
+	gpg --armor --detach-sig json.tar.xz
 	cp $(AMALGAMATED_FILE) release_files
-	mv $(AMALGAMATED_FILE).asc release_files
-	cd release_files ; shasum -a 256 json.hpp > hashes.txt
-	cd release_files ; shasum -a 256 include.zip >> hashes.txt
+	cp $(AMALGAMATED_FWD_FILE) release_files
+	mv $(AMALGAMATED_FILE).asc $(AMALGAMATED_FWD_FILE).asc json.tar.xz json.tar.xz.asc include.zip include.zip.asc release_files
+	cd release_files ; shasum -a 256 json.hpp include.zip json.tar.xz > hashes.txt
 
 
 ##########################################################################
@@ -225,11 +227,11 @@ release:
 
 # clean up
 clean:
-	rm -fr json_unit json_benchmarks fuzz fuzz-testing *.dSYM test/*.dSYM oclint_report.html
+	rm -fr fuzz fuzz-testing *.dSYM tests/*.dSYM
 	rm -fr benchmarks/files/numbers/*.json
-	rm -fr cmake-3.1.0-Darwin64.tar.gz cmake-3.1.0-Darwin64
-	rm -fr cmake-build-benchmarks cmake-build-pedantic fuzz-testing cmake-build-clang-analyze cmake-build-pvs-studio cmake-build-infer cmake_build
-	$(MAKE) clean -Cdoc
+	rm -fr cmake-build-benchmarks fuzz-testing cmake-build-pvs-studio release_files
+	$(MAKE) clean -Cdocs
+
 
 ##########################################################################
 # Thirdparty code
@@ -243,3 +245,22 @@ update_hedley:
 	$(SED) -i '1s/^/#pragma once\n\n/' include/nlohmann/thirdparty/hedley/hedley.hpp
 	$(SED) -i '1s/^/#pragma once\n\n/' include/nlohmann/thirdparty/hedley/hedley_undef.hpp
 	$(MAKE) amalgamate
+
+##########################################################################
+# serve_header.py
+##########################################################################
+
+serve_header:
+	./tools/serve_header/serve_header.py --make $(MAKE)
+
+##########################################################################
+# REUSE
+##########################################################################
+
+reuse:
+	pipx run reuse annotate --recursive single_include include -tjson --license MIT --copyright "Niels Lohmann <https://nlohmann.me>" --year "2013-2025" --merge-copyrights
+	pipx run reuse annotate $(TESTS_SRCS) -tjson_support --license MIT --copyright "Niels Lohmann <https://nlohmann.me>" --year "2013-2025" --merge-copyrights
+	pipx run reuse lint
+
+spdx:
+	pipx run reuse spdx --output nlohmann_json.spdx --creator-person "Niels Lohmann" --add-license-concluded

Package.swift

@@ -0,0 +1,22 @@
+// swift-tools-version: 5.9
+// The swift-tools-version declares the minimum version of Swift required to build this package.
+
+import PackageDescription
+
+let package = Package(
+    name: "nlohmann-json",
+     platforms: [
+        .iOS(.v12), .macOS(.v10_13), .tvOS(.v12), .watchOS(.v4), .visionOS(.v1)
+    ],
+    products: [
+        .library(name: "json", targets: ["json"])
+    ],
+    targets: [
+        .target(
+            name: "json",
+            path: "single_include/nlohmann",
+            publicHeadersPath: "."
+        )
+    ],
+    cxxLanguageStandard: .cxx11
+)

cmake/ci.cmake

@@ -8,34 +8,24 @@ set(N 10)
 include(FindPython3)
 find_package(Python3 COMPONENTS Interpreter)
 
-find_program(ASTYLE_TOOL NAMES astyle)
-execute_process(COMMAND ${ASTYLE_TOOL} --version OUTPUT_VARIABLE ASTYLE_TOOL_VERSION ERROR_VARIABLE ASTYLE_TOOL_VERSION)
-string(REGEX MATCH "[0-9]+(\\.[0-9]+)+" ASTYLE_TOOL_VERSION "${ASTYLE_TOOL_VERSION}")
-message(STATUS "🔖 Artistic Style ${ASTYLE_TOOL_VERSION} (${ASTYLE_TOOL})")
-
-find_program(CLANG_TOOL NAMES clang++-HEAD clang++-13 clang++-12 clang++-11 clang++)
+find_program(CLANG_TOOL NAMES clang++-HEAD clang++ clang++-20 clang++-19 clang++-18 clang++-17 clang++-16 clang++-15 clang++-14 clang++-13 clang++-12 clang++-11 clang++)
 execute_process(COMMAND ${CLANG_TOOL} --version OUTPUT_VARIABLE CLANG_TOOL_VERSION ERROR_VARIABLE CLANG_TOOL_VERSION)
 string(REGEX MATCH "[0-9]+(\\.[0-9]+)+" CLANG_TOOL_VERSION "${CLANG_TOOL_VERSION}")
 message(STATUS "🔖 Clang ${CLANG_TOOL_VERSION} (${CLANG_TOOL})")
 
-find_program(CLANG_TIDY_TOOL NAMES clang-tidy-12 clang-tidy-11 clang-tidy)
+find_program(CLANG_TIDY_TOOL NAMES clang-tidy-20 clang-tidy-19 clang-tidy-18 clang-tidy-17 clang-tidy-16 clang-tidy-15 clang-tidy-14 clang-tidy-13 clang-tidy-12 clang-tidy-11 clang-tidy)
 execute_process(COMMAND ${CLANG_TIDY_TOOL} --version OUTPUT_VARIABLE CLANG_TIDY_TOOL_VERSION ERROR_VARIABLE CLANG_TIDY_TOOL_VERSION)
 string(REGEX MATCH "[0-9]+(\\.[0-9]+)+" CLANG_TIDY_TOOL_VERSION "${CLANG_TIDY_TOOL_VERSION}")
 message(STATUS "🔖 Clang-Tidy ${CLANG_TIDY_TOOL_VERSION} (${CLANG_TIDY_TOOL})")
 
 message(STATUS "🔖 CMake ${CMAKE_VERSION} (${CMAKE_COMMAND})")
 
-find_program(CPPCHECK_TOOL NAMES cppcheck)
-execute_process(COMMAND ${CPPCHECK_TOOL} --version OUTPUT_VARIABLE CPPCHECK_TOOL_VERSION ERROR_VARIABLE CPPCHECK_TOOL_VERSION)
-string(REGEX MATCH "[0-9]+(\\.[0-9]+)+" CPPCHECK_TOOL_VERSION "${CPPCHECK_TOOL_VERSION}")
-message(STATUS "🔖 Cppcheck ${CPPCHECK_TOOL_VERSION} (${CPPCHECK_TOOL})")
-
-find_program(GCC_TOOL NAMES g++-HEAD g++-11 g++-latest)
+find_program(GCC_TOOL NAMES g++-latest g++-HEAD g++ g++-15 g++-14 g++-13 g++-12 g++-11 g++-10)
 execute_process(COMMAND ${GCC_TOOL} --version OUTPUT_VARIABLE GCC_TOOL_VERSION ERROR_VARIABLE GCC_TOOL_VERSION)
 string(REGEX MATCH "[0-9]+(\\.[0-9]+)+" GCC_TOOL_VERSION "${GCC_TOOL_VERSION}")
 message(STATUS "🔖 GCC ${GCC_TOOL_VERSION} (${GCC_TOOL})")
 
-find_program(GCOV_TOOL NAMES gcov-HEAD gcov-11 gcov-10 gcov)
+find_program(GCOV_TOOL NAMES gcov-HEAD gcov gcov-15 gcov-14 gcov-13 gcov-12 gcov-11 gcov-10)
 execute_process(COMMAND ${GCOV_TOOL} --version OUTPUT_VARIABLE GCOV_TOOL_VERSION ERROR_VARIABLE GCOV_TOOL_VERSION)
 string(REGEX MATCH "[0-9]+(\\.[0-9]+)+" GCOV_TOOL_VERSION "${GCOV_TOOL_VERSION}")
 message(STATUS "🔖 GCOV ${GCOV_TOOL_VERSION} (${GCOV_TOOL})")
@@ -79,7 +69,7 @@ message(STATUS "🔖 Valgrind ${VALGRIND_TOOL_VERSION} (${VALGRIND_TOOL})")
 find_program(GENHTML_TOOL NAMES genhtml)
 find_program(PLOG_CONVERTER_TOOL NAMES plog-converter)
 find_program(PVS_STUDIO_ANALYZER_TOOL NAMES pvs-studio-analyzer)
-find_program(SCAN_BUILD_TOOL NAMES scan-build-12 scan-build-11 scan-build)
+find_program(SCAN_BUILD_TOOL NAMES scan-build-15 scan-build-14 scan-build-13 scan-build-12 scan-build-11 scan-build)
 
 # the individual source files
 file(GLOB_RECURSE SRC_FILES ${PROJECT_SOURCE_DIR}/include/nlohmann/*.hpp)
@@ -88,317 +78,13 @@ file(GLOB_RECURSE SRC_FILES ${PROJECT_SOURCE_DIR}/include/nlohmann/*.hpp)
 # Thorough check with recent compilers
 ###############################################################################
 
-# Ignored Clang warnings:
-# -Wno-c++98-compat               The library targets C++11.
-# -Wno-c++98-compat-pedantic      The library targets C++11.
-# -Wno-deprecated-declarations    The library contains annotations for deprecated functions.
-# -Wno-extra-semi-stmt            The library uses std::assert which triggers this warning.
-# -Wno-padded                     We do not care about padding warnings.
-# -Wno-covered-switch-default     All switches list all cases and a default case.
-# -Wno-weak-vtables               The library is header-only.
-# -Wreserved-identifier           See https://github.com/onqtam/doctest/issues/536.
-
-set(CLANG_CXXFLAGS "-std=c++11                        \
-    -Werror                                           \
-    -Weverything                                      \
-    -Wno-c++98-compat                                    \
-    -Wno-c++98-compat-pedantic                           \
-    -Wno-deprecated-declarations                         \
-    -Wno-extra-semi-stmt                                 \
-    -Wno-padded                                          \
-    -Wno-covered-switch-default                          \
-    -Wno-weak-vtables                                    \
-    -Wno-reserved-identifier                             \
-")
-
-# Ignored GCC warnings:
-# -Wno-abi-tag                    We do not care about ABI tags.
-# -Wno-aggregate-return           The library uses aggregate returns.
-# -Wno-long-long                  The library uses the long long type to interface with system functions.
-# -Wno-namespaces                 The library uses namespaces.
-# -Wno-padded                     We do not care about padding warnings.
-# -Wno-system-headers             We do not care about warnings in system headers.
-# -Wno-templates                  The library uses templates.
-
-set(GCC_CXXFLAGS "-std=c++11                          \
-    -pedantic                                         \
-    -Werror                                           \
-    --all-warnings                                    \
-    --extra-warnings                                  \
-    -W                                                \
-    -WNSObject-attribute                              \
-    -Wno-abi-tag                                         \
-    -Waddress                                         \
-    -Waddress-of-packed-member                        \
-    -Wno-aggregate-return                                \
-    -Waggressive-loop-optimizations                   \
-    -Waligned-new=all                                 \
-    -Wall                                             \
-    -Walloc-zero                                      \
-    -Walloca                                          \
-    -Wanalyzer-double-fclose                          \
-    -Wanalyzer-double-free                            \
-    -Wanalyzer-exposure-through-output-file           \
-    -Wanalyzer-file-leak                              \
-    -Wanalyzer-free-of-non-heap                       \
-    -Wanalyzer-malloc-leak                            \
-    -Wanalyzer-mismatching-deallocation               \
-    -Wanalyzer-null-argument                          \
-    -Wanalyzer-null-dereference                       \
-    -Wanalyzer-possible-null-argument                 \
-    -Wanalyzer-possible-null-dereference              \
-    -Wanalyzer-shift-count-negative                   \
-    -Wanalyzer-shift-count-overflow                   \
-    -Wanalyzer-stale-setjmp-buffer                    \
-    -Wanalyzer-tainted-array-index                    \
-    -Wanalyzer-too-complex                            \
-    -Wanalyzer-unsafe-call-within-signal-handler      \
-    -Wanalyzer-use-after-free                         \
-    -Wanalyzer-use-of-pointer-in-stale-stack-frame    \
-    -Wanalyzer-write-to-const                         \
-    -Wanalyzer-write-to-string-literal                \
-    -Warith-conversion                                \
-    -Warray-bounds                                    \
-    -Warray-bounds=2                                  \
-    -Warray-parameter=2                               \
-    -Wattribute-alias=2                               \
-    -Wattribute-warning                               \
-    -Wattributes                                      \
-    -Wbool-compare                                    \
-    -Wbool-operation                                  \
-    -Wbuiltin-declaration-mismatch                    \
-    -Wbuiltin-macro-redefined                         \
-    -Wc++0x-compat                                    \
-    -Wc++11-compat                                    \
-    -Wc++14-compat                                    \
-    -Wc++17-compat                                    \
-    -Wc++1z-compat                                    \
-    -Wc++20-compat                                    \
-    -Wc++2a-compat                                    \
-    -Wcannot-profile                                  \
-    -Wcast-align                                      \
-    -Wcast-align=strict                               \
-    -Wcast-function-type                              \
-    -Wcast-qual                                       \
-    -Wcatch-value=3                                   \
-    -Wchar-subscripts                                 \
-    -Wclass-conversion                                \
-    -Wclass-memaccess                                 \
-    -Wclobbered                                       \
-    -Wcomma-subscript                                 \
-    -Wcomment                                         \
-    -Wcomments                                        \
-    -Wconditionally-supported                         \
-    -Wconversion                                      \
-    -Wconversion-null                                 \
-    -Wcoverage-mismatch                               \
-    -Wcpp                                             \
-    -Wctad-maybe-unsupported                          \
-    -Wctor-dtor-privacy                               \
-    -Wdangling-else                                   \
-    -Wdate-time                                       \
-    -Wdelete-incomplete                               \
-    -Wdelete-non-virtual-dtor                         \
-    -Wdeprecated                                      \
-    -Wdeprecated-copy                                 \
-    -Wdeprecated-copy-dtor                            \
-    -Wdeprecated-declarations                         \
-    -Wdeprecated-enum-enum-conversion                 \
-    -Wdeprecated-enum-float-conversion                \
-    -Wdisabled-optimization                           \
-    -Wdiv-by-zero                                     \
-    -Wdouble-promotion                                \
-    -Wduplicated-branches                             \
-    -Wduplicated-cond                                 \
-    -Weffc++                                          \
-    -Wempty-body                                      \
-    -Wendif-labels                                    \
-    -Wenum-compare                                    \
-    -Wenum-conversion                                 \
-    -Wexpansion-to-defined                            \
-    -Wextra                                           \
-    -Wextra-semi                                      \
-    -Wfloat-conversion                                \
-    -Wfloat-equal                                     \
-    -Wformat-contains-nul                             \
-    -Wformat-diag                                     \
-    -Wformat-extra-args                               \
-    -Wformat-nonliteral                               \
-    -Wformat-overflow=2                               \
-    -Wformat-security                                 \
-    -Wformat-signedness                               \
-    -Wformat-truncation=2                             \
-    -Wformat-y2k                                      \
-    -Wformat-zero-length                              \
-    -Wformat=2                                        \
-    -Wframe-address                                   \
-    -Wfree-nonheap-object                             \
-    -Whsa                                             \
-    -Wif-not-aligned                                  \
-    -Wignored-attributes                              \
-    -Wignored-qualifiers                              \
-    -Wimplicit-fallthrough=5                          \
-    -Winaccessible-base                               \
-    -Winherited-variadic-ctor                         \
-    -Winit-list-lifetime                              \
-    -Winit-self                                       \
-    -Winline                                          \
-    -Wint-in-bool-context                             \
-    -Wint-to-pointer-cast                             \
-    -Winvalid-memory-model                            \
-    -Winvalid-offsetof                                \
-    -Winvalid-pch                                     \
-    -Wliteral-suffix                                  \
-    -Wlogical-not-parentheses                         \
-    -Wlogical-op                                      \
-    -Wno-long-long                                       \
-    -Wlto-type-mismatch                               \
-    -Wmain                                            \
-    -Wmaybe-uninitialized                             \
-    -Wmemset-elt-size                                 \
-    -Wmemset-transposed-args                          \
-    -Wmisleading-indentation                          \
-    -Wmismatched-dealloc                              \
-    -Wmismatched-new-delete                           \
-    -Wmismatched-tags                                 \
-    -Wmissing-attributes                              \
-    -Wmissing-braces                                  \
-    -Wmissing-declarations                            \
-    -Wmissing-field-initializers                      \
-    -Wmissing-include-dirs                            \
-    -Wmissing-profile                                 \
-    -Wmultichar                                       \
-    -Wmultiple-inheritance                            \
-    -Wmultistatement-macros                           \
-    -Wno-namespaces                                      \
-    -Wnarrowing                                       \
-    -Wnoexcept                                        \
-    -Wnoexcept-type                                   \
-    -Wnon-template-friend                             \
-    -Wnon-virtual-dtor                                \
-    -Wnonnull                                         \
-    -Wnonnull-compare                                 \
-    -Wnormalized=nfkc                                 \
-    -Wnull-dereference                                \
-    -Wodr                                             \
-    -Wold-style-cast                                  \
-    -Wopenmp-simd                                     \
-    -Woverflow                                        \
-    -Woverlength-strings                              \
-    -Woverloaded-virtual                              \
-    -Wpacked                                          \
-    -Wpacked-bitfield-compat                          \
-    -Wpacked-not-aligned                              \
-    -Wno-padded                                          \
-    -Wparentheses                                     \
-    -Wpedantic                                        \
-    -Wpessimizing-move                                \
-    -Wplacement-new=2                                 \
-    -Wpmf-conversions                                 \
-    -Wpointer-arith                                   \
-    -Wpointer-compare                                 \
-    -Wpragmas                                         \
-    -Wprio-ctor-dtor                                  \
-    -Wpsabi                                           \
-    -Wrange-loop-construct                            \
-    -Wredundant-decls                                 \
-    -Wredundant-move                                  \
-    -Wredundant-tags                                  \
-    -Wregister                                        \
-    -Wreorder                                         \
-    -Wrestrict                                        \
-    -Wreturn-local-addr                               \
-    -Wreturn-type                                     \
-    -Wscalar-storage-order                            \
-    -Wsequence-point                                  \
-    -Wshadow=compatible-local                         \
-    -Wshadow=global                                   \
-    -Wshadow=local                                    \
-    -Wshift-count-negative                            \
-    -Wshift-count-overflow                            \
-    -Wshift-negative-value                            \
-    -Wshift-overflow=2                                \
-    -Wsign-compare                                    \
-    -Wsign-conversion                                 \
-    -Wsign-promo                                      \
-    -Wsized-deallocation                              \
-    -Wsizeof-array-argument                           \
-    -Wsizeof-array-div                                \
-    -Wsizeof-pointer-div                              \
-    -Wsizeof-pointer-memaccess                        \
-    -Wstack-protector                                 \
-    -Wstrict-aliasing                                 \
-    -Wstrict-aliasing=3                               \
-    -Wstrict-null-sentinel                            \
-    -Wstrict-overflow                                 \
-    -Wstrict-overflow=5                               \
-    -Wstring-compare                                  \
-    -Wstringop-overflow=4                             \
-    -Wstringop-overread                               \
-    -Wstringop-truncation                             \
-    -Wsubobject-linkage                               \
-    -Wsuggest-attribute=cold                          \
-    -Wsuggest-attribute=const                         \
-    -Wsuggest-attribute=format                        \
-    -Wsuggest-attribute=malloc                        \
-    -Wsuggest-attribute=noreturn                      \
-    -Wsuggest-attribute=pure                          \
-    -Wsuggest-final-methods                           \
-    -Wsuggest-final-types                             \
-    -Wsuggest-override                                \
-    -Wswitch                                          \
-    -Wswitch-bool                                     \
-    -Wswitch-default                                  \
-    -Wswitch-enum                                     \
-    -Wswitch-outside-range                            \
-    -Wswitch-unreachable                              \
-    -Wsync-nand                                       \
-    -Wsynth                                           \
-    -Wno-system-headers                                  \
-    -Wtautological-compare                            \
-    -Wno-templates                                       \
-    -Wterminate                                       \
-    -Wtrampolines                                     \
-    -Wtrigraphs                                       \
-    -Wtsan                                            \
-    -Wtype-limits                                     \
-    -Wundef                                           \
-    -Wuninitialized                                   \
-    -Wunknown-pragmas                                 \
-    -Wunreachable-code                                \
-    -Wunsafe-loop-optimizations                       \
-    -Wunused                                          \
-    -Wunused-but-set-parameter                        \
-    -Wunused-but-set-variable                         \
-    -Wunused-const-variable=2                         \
-    -Wunused-function                                 \
-    -Wunused-label                                    \
-    -Wunused-local-typedefs                           \
-    -Wunused-macros                                   \
-    -Wunused-parameter                                \
-    -Wunused-result                                   \
-    -Wunused-value                                    \
-    -Wunused-variable                                 \
-    -Wuseless-cast                                    \
-    -Wvarargs                                         \
-    -Wvariadic-macros                                 \
-    -Wvector-operation-performance                    \
-    -Wvexing-parse                                    \
-    -Wvirtual-inheritance                             \
-    -Wvirtual-move-assign                             \
-    -Wvla                                             \
-    -Wvla-parameter                                   \
-    -Wvolatile                                        \
-    -Wvolatile-register-var                           \
-    -Wwrite-strings                                   \
-    -Wzero-as-null-pointer-constant                   \
-    -Wzero-length-bounds                              \
-")
+include(clang_flags)
+include(gcc_flags)
 
 add_custom_target(ci_test_gcc
-    COMMAND CXX=${GCC_TOOL} CXXFLAGS=${GCC_CXXFLAGS} ${CMAKE_COMMAND}
+    COMMAND CXX=${GCC_TOOL} CXXFLAGS="${GCC_CXXFLAGS}" ${CMAKE_COMMAND}
         -DCMAKE_BUILD_TYPE=Debug -GNinja
-        -DJSON_BuildTests=ON -DJSON_MultipleHeaders=ON
+        -DJSON_BuildTests=ON
         -S${PROJECT_SOURCE_DIR} -B${PROJECT_BINARY_DIR}/build_gcc
     COMMAND ${CMAKE_COMMAND} --build ${PROJECT_BINARY_DIR}/build_gcc
     COMMAND cd ${PROJECT_BINARY_DIR}/build_gcc && ${CMAKE_CTEST_COMMAND} --parallel ${N} --output-on-failure
@@ -406,9 +92,9 @@ add_custom_target(ci_test_gcc
 )
 
 add_custom_target(ci_test_clang
-    COMMAND CXX=${CLANG_TOOL} CXXFLAGS=${CLANG_CXXFLAGS} ${CMAKE_COMMAND}
+    COMMAND CXX=${CLANG_TOOL} CXXFLAGS="${CLANG_CXXFLAGS}" ${CMAKE_COMMAND}
         -DCMAKE_BUILD_TYPE=Debug -GNinja
-        -DJSON_BuildTests=ON -DJSON_MultipleHeaders=ON
+        -DJSON_BuildTests=ON
         -S${PROJECT_SOURCE_DIR} -B${PROJECT_BINARY_DIR}/build_clang
     COMMAND ${CMAKE_COMMAND} --build ${PROJECT_BINARY_DIR}/build_clang
     COMMAND cd ${PROJECT_BINARY_DIR}/build_clang && ${CMAKE_CTEST_COMMAND} --parallel ${N} --output-on-failure
@@ -419,12 +105,12 @@ add_custom_target(ci_test_clang
 # Different C++ Standards.
 ###############################################################################
 
-foreach(CXX_STANDARD 11 14 17 20)
+foreach(CXX_STANDARD 11 14 17 20 23 26)
     add_custom_target(ci_test_gcc_cxx${CXX_STANDARD}
-        COMMAND CXX=${GCC_TOOL} ${CMAKE_COMMAND}
+        COMMAND CXX=${GCC_TOOL} CXXFLAGS="${GCC_CXXFLAGS}" ${CMAKE_COMMAND}
             -DCMAKE_BUILD_TYPE=Debug -GNinja
-            -DCMAKE_CXX_STANDARD=${CXX_STANDARD} -DCMAKE_CXX_STANDARD_REQUIRED=ON
             -DJSON_BuildTests=ON -DJSON_FastTests=ON
+            -DJSON_TestStandards=${CXX_STANDARD}
             -S${PROJECT_SOURCE_DIR} -B${PROJECT_BINARY_DIR}/build_gcc_cxx${CXX_STANDARD}
         COMMAND ${CMAKE_COMMAND} --build ${PROJECT_BINARY_DIR}/build_gcc_cxx${CXX_STANDARD}
         COMMAND cd ${PROJECT_BINARY_DIR}/build_gcc_cxx${CXX_STANDARD} && ${CMAKE_CTEST_COMMAND} --parallel ${N} --output-on-failure
@@ -432,15 +118,28 @@ foreach(CXX_STANDARD 11 14 17 20)
     )
 
     add_custom_target(ci_test_clang_cxx${CXX_STANDARD}
-        COMMAND CXX=${CLANG_TOOL} ${CMAKE_COMMAND}
+        COMMAND CXX=${CLANG_TOOL} CXXFLAGS="${CLANG_CXXFLAGS}" ${CMAKE_COMMAND}
             -DCMAKE_BUILD_TYPE=Debug -GNinja
-            -DCMAKE_CXX_STANDARD=${CXX_STANDARD} -DCMAKE_CXX_STANDARD_REQUIRED=ON
-            -DJSON_BuildTests=ON
+            -DJSON_BuildTests=ON -DJSON_FastTests=ON
+            -DJSON_TestStandards=${CXX_STANDARD}
             -S${PROJECT_SOURCE_DIR} -B${PROJECT_BINARY_DIR}/build_clang_cxx${CXX_STANDARD}
         COMMAND ${CMAKE_COMMAND} --build ${PROJECT_BINARY_DIR}/build_clang_cxx${CXX_STANDARD}
         COMMAND cd ${PROJECT_BINARY_DIR}/build_clang_cxx${CXX_STANDARD} && ${CMAKE_CTEST_COMMAND} --parallel ${N} --output-on-failure
         COMMENT "Compile and test with Clang for C++${CXX_STANDARD}"
     )
+
+    add_custom_target(ci_test_clang_libcxx_cxx${CXX_STANDARD}
+        COMMAND CXX=${CLANG_TOOL} CXXFLAGS="${CLANG_CXXFLAGS}" ${CMAKE_COMMAND}
+            -DCMAKE_BUILD_TYPE=Debug -GNinja
+            -DJSON_BuildTests=ON -DJSON_FastTests=ON
+            -DJSON_TestStandards=${CXX_STANDARD}
+            -DCMAKE_CXX_FLAGS="-stdlib=libc++"
+            -DCMAKE_EXE_LINKER_FLAGS="-lc++abi"
+            -S${PROJECT_SOURCE_DIR} -B${PROJECT_BINARY_DIR}/build_clang_cxx${CXX_STANDARD}
+        COMMAND ${CMAKE_COMMAND} --build ${PROJECT_BINARY_DIR}/build_clang_cxx${CXX_STANDARD}
+        COMMAND cd ${PROJECT_BINARY_DIR}/build_clang_cxx${CXX_STANDARD} && ${CMAKE_CTEST_COMMAND} --parallel ${N} --output-on-failure
+        COMMENT "Compile and test with Clang for C++${CXX_STANDARD} (libc++)"
+    )
 endforeach()
 
 ###############################################################################
@@ -448,9 +147,9 @@ endforeach()
 ###############################################################################
 
 add_custom_target(ci_test_noexceptions
-    COMMAND CXX=${CLANG_TOOL} ${CMAKE_COMMAND}
+    COMMAND ${CMAKE_COMMAND}
     -DCMAKE_BUILD_TYPE=Debug -GNinja
-    -DJSON_BuildTests=ON -DJSON_MultipleHeaders=ON -DCMAKE_CXX_FLAGS=-DJSON_NOEXCEPTION -DDOCTEST_TEST_FILTER=--no-throw
+    -DJSON_BuildTests=ON -DCMAKE_CXX_FLAGS=-DJSON_NOEXCEPTION -DDOCTEST_TEST_FILTER=--no-throw
     -S${PROJECT_SOURCE_DIR} -B${PROJECT_BINARY_DIR}/build_noexceptions
     COMMAND ${CMAKE_COMMAND} --build ${PROJECT_BINARY_DIR}/build_noexceptions
     COMMAND cd ${PROJECT_BINARY_DIR}/build_noexceptions && ${CMAKE_CTEST_COMMAND} --parallel ${N} --output-on-failure
@@ -462,9 +161,9 @@ add_custom_target(ci_test_noexceptions
 ###############################################################################
 
 add_custom_target(ci_test_noimplicitconversions
-    COMMAND CXX=${CLANG_TOOL} ${CMAKE_COMMAND}
+    COMMAND ${CMAKE_COMMAND}
     -DCMAKE_BUILD_TYPE=Debug -GNinja
-    -DJSON_BuildTests=ON -DJSON_MultipleHeaders=ON -DJSON_ImplicitConversions=OFF
+    -DJSON_BuildTests=ON -DJSON_ImplicitConversions=OFF
     -S${PROJECT_SOURCE_DIR} -B${PROJECT_BINARY_DIR}/build_noimplicitconversions
     COMMAND ${CMAKE_COMMAND} --build ${PROJECT_BINARY_DIR}/build_noimplicitconversions
     COMMAND cd ${PROJECT_BINARY_DIR}/build_noimplicitconversions && ${CMAKE_CTEST_COMMAND} --parallel ${N} --output-on-failure
@@ -476,15 +175,58 @@ add_custom_target(ci_test_noimplicitconversions
 ###############################################################################
 
 add_custom_target(ci_test_diagnostics
-    COMMAND CXX=${CLANG_TOOL} ${CMAKE_COMMAND}
+    COMMAND ${CMAKE_COMMAND}
     -DCMAKE_BUILD_TYPE=Debug -GNinja
-    -DJSON_BuildTests=ON -DJSON_MultipleHeaders=ON -DJSON_Diagnostics=ON
+    -DJSON_BuildTests=ON -DJSON_Diagnostics=ON
     -S${PROJECT_SOURCE_DIR} -B${PROJECT_BINARY_DIR}/build_diagnostics
     COMMAND ${CMAKE_COMMAND} --build ${PROJECT_BINARY_DIR}/build_diagnostics
     COMMAND cd ${PROJECT_BINARY_DIR}/build_diagnostics && ${CMAKE_CTEST_COMMAND} --parallel ${N} --output-on-failure
     COMMENT "Compile and test with improved diagnostics enabled"
 )
 
+###############################################################################
+# Enable diagnostic positions support.
+###############################################################################
+
+add_custom_target(ci_test_diagnostic_positions
+    COMMAND ${CMAKE_COMMAND}
+    -DCMAKE_BUILD_TYPE=Debug -GNinja
+    -DJSON_BuildTests=ON -DJSON_Diagnostic_Positions=ON
+    -S${PROJECT_SOURCE_DIR} -B${PROJECT_BINARY_DIR}/build_diagnostic_positions
+    COMMAND ${CMAKE_COMMAND} --build ${PROJECT_BINARY_DIR}/build_diagnostic_positions
+    COMMAND cd ${PROJECT_BINARY_DIR}/build_diagnostic_positions && ${CMAKE_CTEST_COMMAND} --parallel ${N} --output-on-failure
+    COMMENT "Compile and test with diagnostic positions enabled"
+)
+
+###############################################################################
+# Enable legacy discarded value comparison.
+###############################################################################
+
+add_custom_target(ci_test_legacycomparison
+    COMMAND ${CMAKE_COMMAND}
+    -DCMAKE_BUILD_TYPE=Debug -GNinja
+    -DJSON_BuildTests=ON -DJSON_LegacyDiscardedValueComparison=ON
+    -S${PROJECT_SOURCE_DIR} -B${PROJECT_BINARY_DIR}/build_legacycomparison
+    COMMAND ${CMAKE_COMMAND} --build ${PROJECT_BINARY_DIR}/build_legacycomparison
+    COMMAND cd ${PROJECT_BINARY_DIR}/build_legacycomparison && ${CMAKE_CTEST_COMMAND} --parallel ${N} --output-on-failure
+    COMMENT "Compile and test with legacy discarded value comparison enabled"
+)
+
+###############################################################################
+# Disable global UDLs.
+###############################################################################
+
+add_custom_target(ci_test_noglobaludls
+    COMMAND ${CMAKE_COMMAND}
+    -DCMAKE_BUILD_TYPE=Debug -GNinja
+    -DJSON_BuildTests=ON -DJSON_FastTests=ON -DJSON_GlobalUDLs=OFF
+    -DCMAKE_CXX_FLAGS=-DJSON_TEST_NO_GLOBAL_UDLS
+    -S${PROJECT_SOURCE_DIR} -B${PROJECT_BINARY_DIR}/build_noglobaludls
+    COMMAND ${CMAKE_COMMAND} --build ${PROJECT_BINARY_DIR}/build_noglobaludls
+    COMMAND cd ${PROJECT_BINARY_DIR}/build_noglobaludls && ${CMAKE_CTEST_COMMAND} --parallel ${N} --output-on-failure
+    COMMENT "Compile and test with global UDLs disabled"
+)
+
 ###############################################################################
 # Coverage.
 ###############################################################################
@@ -492,14 +234,21 @@ add_custom_target(ci_test_diagnostics
 add_custom_target(ci_test_coverage
     COMMAND CXX=g++ ${CMAKE_COMMAND}
         -DCMAKE_BUILD_TYPE=Debug -GNinja -DCMAKE_CXX_FLAGS="--coverage;-fprofile-arcs;-ftest-coverage"
-        -DJSON_BuildTests=ON -DJSON_MultipleHeaders=ON
+        -DJSON_BuildTests=ON
         -S${PROJECT_SOURCE_DIR} -B${PROJECT_BINARY_DIR}/build_coverage
     COMMAND ${CMAKE_COMMAND} --build ${PROJECT_BINARY_DIR}/build_coverage
     COMMAND cd ${PROJECT_BINARY_DIR}/build_coverage && ${CMAKE_CTEST_COMMAND} --parallel ${N} --output-on-failure
 
-    COMMAND ${LCOV_TOOL} --directory . --capture --output-file json.info --rc lcov_branch_coverage=1
-    COMMAND ${LCOV_TOOL} -e json.info ${SRC_FILES} --output-file json.info.filtered --rc lcov_branch_coverage=1
-    COMMAND ${CMAKE_SOURCE_DIR}/test/thirdparty/imapdl/filterbr.py json.info.filtered > json.info.filtered.noexcept
+    COMMAND CXX=g++ ${CMAKE_COMMAND}
+        -DCMAKE_BUILD_TYPE=Debug -GNinja -DCMAKE_CXX_FLAGS="-m32;--coverage;-fprofile-arcs;-ftest-coverage"
+        -DJSON_BuildTests=ON -DJSON_32bitTest=ONLY
+        -S${PROJECT_SOURCE_DIR} -B${PROJECT_BINARY_DIR}/build_coverage32
+    COMMAND ${CMAKE_COMMAND} --build ${PROJECT_BINARY_DIR}/build_coverage32
+    COMMAND cd ${PROJECT_BINARY_DIR}/build_coverage32 && ${CMAKE_CTEST_COMMAND} --parallel ${N} --output-on-failure
+
+    COMMAND ${LCOV_TOOL} --directory . --capture --output-file json.info --rc branch_coverage=1 --rc geninfo_unexecuted_blocks=1 --ignore-errors mismatch --ignore-errors unused
+    COMMAND ${LCOV_TOOL} -e json.info ${SRC_FILES} --output-file json.info.filtered --rc branch_coverage=1 --ignore-errors unused
+    COMMAND ${CMAKE_SOURCE_DIR}/tests/thirdparty/imapdl/filterbr.py json.info.filtered > json.info.filtered.noexcept
     COMMAND genhtml --title "JSON for Modern C++" --legend --demangle-cpp --output-directory html --show-details --branch-coverage json.info.filtered.noexcept
 
     COMMENT "Compile and test with coverage"
@@ -525,28 +274,51 @@ add_custom_target(ci_test_clang_sanitizer
 # Check if header is amalgamated and sources are properly indented.
 ###############################################################################
 
-set(ASTYLE_FLAGS --style=allman --indent=spaces=4 --indent-modifiers --indent-switches --indent-preproc-block --indent-preproc-define --indent-col1-comments --pad-oper --pad-header --align-pointer=type --align-reference=type --add-brackets --convert-tabs --close-templates --lineend=linux --preserve-date --formatted)
-
 file(GLOB_RECURSE INDENT_FILES
     ${PROJECT_SOURCE_DIR}/include/nlohmann/*.hpp
-    ${PROJECT_SOURCE_DIR}/test/src/*.cpp
-    ${PROJECT_SOURCE_DIR}/test/src/*.hpp
-    ${PROJECT_SOURCE_DIR}/benchmarks/src/benchmarks.cpp
-    ${PROJECT_SOURCE_DIR}/doc/examples/*.cpp
+        ${PROJECT_SOURCE_DIR}/tests/src/*.cpp
+        ${PROJECT_SOURCE_DIR}/tests/src/*.hpp
+        ${PROJECT_SOURCE_DIR}/tests/benchmarks/src/benchmarks.cpp
+    ${PROJECT_SOURCE_DIR}/docs/examples/*.cpp
 )
 
+set(include_dir ${PROJECT_SOURCE_DIR}/single_include/nlohmann)
+set(tool_dir ${PROJECT_SOURCE_DIR}/tools/amalgamate)
 add_custom_target(ci_test_amalgamation
-    COMMAND rm -fr ${PROJECT_SOURCE_DIR}/single_include/nlohmann/json.hpp~
-    COMMAND cp ${PROJECT_SOURCE_DIR}/single_include/nlohmann/json.hpp ${PROJECT_SOURCE_DIR}/single_include/nlohmann/json.hpp~
-    COMMAND ${Python3_EXECUTABLE} ${PROJECT_SOURCE_DIR}/third_party/amalgamate/amalgamate.py -c ${PROJECT_SOURCE_DIR}/third_party/amalgamate/config.json -s .
-    COMMAND ${ASTYLE_TOOL} ${ASTYLE_FLAGS} --suffix=none --quiet ${PROJECT_SOURCE_DIR}/single_include/nlohmann/json.hpp
-    COMMAND diff ${PROJECT_SOURCE_DIR}/single_include/nlohmann/json.hpp~ ${PROJECT_SOURCE_DIR}/single_include/nlohmann/json.hpp
+    COMMAND rm -fr ${include_dir}/json.hpp~ ${include_dir}/json_fwd.hpp~
+    COMMAND cp ${include_dir}/json.hpp ${include_dir}/json.hpp~
+    COMMAND cp ${include_dir}/json_fwd.hpp ${include_dir}/json_fwd.hpp~
 
-    COMMAND ${ASTYLE_TOOL} ${ASTYLE_FLAGS} ${INDENT_FILES}
-    COMMAND cd ${PROJECT_SOURCE_DIR} && for FILE in `find . -name '*.orig'`\; do false \; done
+    COMMAND ${Python3_EXECUTABLE} -mvenv venv_astyle
+    COMMAND venv_astyle/bin/pip3 --quiet install -r ${CMAKE_SOURCE_DIR}/tools/astyle/requirements.txt
+    COMMAND venv_astyle/bin/astyle --version
+
+    COMMAND ${Python3_EXECUTABLE} ${tool_dir}/amalgamate.py -c ${tool_dir}/config_json.json -s .
+    COMMAND ${Python3_EXECUTABLE} ${tool_dir}/amalgamate.py -c ${tool_dir}/config_json_fwd.json -s .
+    COMMAND venv_astyle/bin/astyle --project=tools/astyle/.astylerc --suffix=none ${include_dir}/json.hpp ${include_dir}/json_fwd.hpp
+
+    COMMAND diff ${include_dir}/json.hpp~ ${include_dir}/json.hpp
+    COMMAND diff ${include_dir}/json_fwd.hpp~ ${include_dir}/json_fwd.hpp
+
+    COMMAND venv_astyle/bin/astyle --project=tools/astyle/.astylerc --suffix=orig ${INDENT_FILES}
+    COMMAND for FILE in `find . -name '*.orig'`\; do false \; done
 
     WORKING_DIRECTORY ${PROJECT_SOURCE_DIR}
-    COMMENT "Check amalagamation and indentation"
+    COMMENT "Check amalgamation and indentation"
+)
+
+###############################################################################
+# Build and test using the amalgamated header
+###############################################################################
+
+add_custom_target(ci_test_single_header
+    COMMAND ${CMAKE_COMMAND}
+        -DCMAKE_BUILD_TYPE=Debug -GNinja
+        -DJSON_BuildTests=ON -DJSON_MultipleHeaders=OFF -DJSON_FastTests=ON
+        -S${PROJECT_SOURCE_DIR} -B${PROJECT_BINARY_DIR}/build_single_header
+    COMMAND ${CMAKE_COMMAND} --build ${PROJECT_BINARY_DIR}/build_single_header
+    COMMAND cd ${PROJECT_BINARY_DIR}/build_single_header && ${CMAKE_CTEST_COMMAND} --parallel ${N} --output-on-failure
+    COMMENT "Compile and test single-header version"
 )
 
 ###############################################################################
@@ -583,7 +355,16 @@ add_custom_target(ci_clang_analyze
 ###############################################################################
 
 add_custom_target(ci_cppcheck
-    COMMAND ${CPPCHECK_TOOL} --enable=warning --suppress=missingReturn --inline-suppr --inconclusive --force --std=c++11 ${PROJECT_SOURCE_DIR}/single_include/nlohmann/json.hpp --error-exitcode=1
+    COMMAND mkdir -p cppcheck
+    COMMAND clang -dM -E -x c++ -std=c++11 ${CMAKE_SOURCE_DIR}/include/nlohmann/thirdparty/hedley/hedley.hpp > default_defines.hpp 2> /dev/null
+    COMMAND ${Python3_EXECUTABLE} -mvenv venv_cppcheck
+    COMMAND venv_cppcheck/bin/pip3 --quiet install -r ${CMAKE_SOURCE_DIR}/cmake/requirements/requirements-cppcheck.txt
+    COMMAND venv_cppcheck/bin/cppcheck --enable=warning --check-level=exhaustive --inline-suppr --inconclusive --force
+            --std=c++11 ${PROJECT_SOURCE_DIR}/include/nlohmann/json.hpp -I ${CMAKE_SOURCE_DIR}/include
+            --error-exitcode=1 --relative-paths=${PROJECT_SOURCE_DIR} -j ${N} --include=default_defines.hpp
+            --cppcheck-build-dir=cppcheck --check-level=exhaustive
+            -UJSON_CATCH_USER -UJSON_TRY_USER -UJSON_ASSERT -UJSON_INTERNAL_CATCH -UJSON_THROW
+            -DJSON_HAS_CPP_11 -UJSON_HAS_CPP_14 -UJSON_HAS_CPP_17 -UJSON_HAS_CPP_20 -UJSON_HAS_THREE_WAY_COMPARISON
     COMMENT "Check code with Cppcheck"
 )
 
@@ -592,8 +373,11 @@ add_custom_target(ci_cppcheck
 ###############################################################################
 
 add_custom_target(ci_cpplint
-    COMMAND ${Python3_EXECUTABLE} ${CMAKE_SOURCE_DIR}/third_party/cpplint/cpplint.py --filter=-whitespace,-legal,-runtime/references,-runtime/explicit,-runtime/indentation_namespace,-readability/casting,-readability/nolint --quiet --recursive ${SRC_FILES}
+    COMMAND ${Python3_EXECUTABLE} -mvenv venv_cpplint
+    COMMAND venv_cpplint/bin/pip3 --quiet install -r ${CMAKE_SOURCE_DIR}/cmake/requirements/requirements-cpplint.txt
+    COMMAND venv_cpplint/bin/cpplint --filter=-whitespace,-legal,-runtime/references,-runtime/explicit,-runtime/indentation_namespace,-readability/casting,-readability/nolint --quiet --recursive ${SRC_FILES}
     COMMENT "Check code with cpplint"
+    WORKING_DIRECTORY ${PROJECT_BINARY_DIR}
 )
 
 ###############################################################################
@@ -632,7 +416,7 @@ add_custom_target(ci_clang_tidy
     COMMAND CXX=${CLANG_TOOL} ${CMAKE_COMMAND}
         -DCMAKE_BUILD_TYPE=Debug -GNinja
         -DCMAKE_EXPORT_COMPILE_COMMANDS=ON -DCMAKE_CXX_CLANG_TIDY=${CLANG_TIDY_TOOL}
-        -DJSON_BuildTests=ON -DJSON_MultipleHeaders=ON
+        -DJSON_BuildTests=ON
         -S${PROJECT_SOURCE_DIR} -B${PROJECT_BINARY_DIR}/build_clang_tidy
     COMMAND ${CMAKE_COMMAND} --build ${PROJECT_BINARY_DIR}/build_clang_tidy
     COMMENT "Check code with Clang-Tidy"
@@ -659,7 +443,7 @@ add_custom_target(ci_pvs_studio
 
 add_custom_target(ci_infer
     COMMAND mkdir -p ${PROJECT_BINARY_DIR}/build_infer
-    COMMAND cd ${PROJECT_BINARY_DIR}/build_infer && ${INFER_TOOL} compile -- ${CMAKE_COMMAND} -DCMAKE_BUILD_TYPE=Debug ${PROJECT_SOURCE_DIR} -DJSON_BuildTests=ON -DJSON_MultipleHeaders=ON
+    COMMAND cd ${PROJECT_BINARY_DIR}/build_infer && ${INFER_TOOL} compile -- ${CMAKE_COMMAND} -DCMAKE_BUILD_TYPE=Debug ${PROJECT_SOURCE_DIR} -DJSON_BuildTests=ON
     COMMAND cd ${PROJECT_BINARY_DIR}/build_infer && ${INFER_TOOL} run -- make
     COMMENT "Check code with Infer"
 )
@@ -670,7 +454,7 @@ add_custom_target(ci_infer
 
 add_custom_target(ci_offline_testdata
     COMMAND mkdir -p ${PROJECT_BINARY_DIR}/build_offline_testdata/test_data
-    COMMAND cd ${PROJECT_BINARY_DIR}/build_offline_testdata/test_data && ${GIT_TOOL} clone -c advice.detachedHead=false --branch v3.0.0 https://github.com/nlohmann/json_test_data.git --quiet --depth 1
+    COMMAND cd ${PROJECT_BINARY_DIR}/build_offline_testdata/test_data && ${GIT_TOOL} clone -c advice.detachedHead=false --branch v3.1.0 https://github.com/nlohmann/json_test_data.git --quiet --depth 1
     COMMAND ${CMAKE_COMMAND}
         -DCMAKE_BUILD_TYPE=Debug -GNinja
         -DJSON_BuildTests=ON -DJSON_FastTests=ON -DJSON_TestDataDirectory=${PROJECT_BINARY_DIR}/build_offline_testdata/test_data/json_test_data
@@ -685,6 +469,7 @@ add_custom_target(ci_offline_testdata
 ###############################################################################
 
 add_custom_target(ci_non_git_tests
+    COMMAND git config --global --add safe.directory ${PROJECT_SOURCE_DIR}
     COMMAND mkdir -p ${PROJECT_BINARY_DIR}/build_non_git_tests/sources
     COMMAND cd ${PROJECT_SOURCE_DIR} && for FILE in `${GIT_TOOL} ls-tree --name-only HEAD`\; do cp -r $$FILE ${PROJECT_BINARY_DIR}/build_non_git_tests/sources \; done
     COMMAND ${CMAKE_COMMAND}
@@ -756,50 +541,58 @@ add_custom_target(ci_benchmarks
 # CMake flags
 ###############################################################################
 
-if (APPLE)
-    set(CMAKE_310_BINARY ${PROJECT_BINARY_DIR}/cmake-3.1.0-Darwin64/CMake.app/Contents/bin/cmake)
+function(ci_get_cmake version var)
+    set(${var} ${PROJECT_BINARY_DIR}/cmake-${version}/bin/cmake)
     add_custom_command(
-        OUTPUT ${CMAKE_310_BINARY}
-        COMMAND wget https://github.com/Kitware/CMake/releases/download/v3.1.0/cmake-3.1.0-Darwin64.tar.gz
-        COMMAND tar xfz cmake-3.1.0-Darwin64.tar.gz
-        COMMAND rm cmake-3.1.0-Darwin64.tar.gz
+        OUTPUT ${${var}}
+        COMMAND wget -nc https://github.com/Kitware/CMake/releases/download/v${version}/cmake-${version}.tar.gz
+        COMMAND tar xfz cmake-${version}.tar.gz
+        COMMAND rm cmake-${version}.tar.gz
+        COMMAND ${CMAKE_COMMAND} -S cmake-${version} -B cmake-${version}
+        COMMAND ${CMAKE_COMMAND} --build cmake-${version} --parallel 10
         WORKING_DIRECTORY ${PROJECT_BINARY_DIR}
-        COMMENT "Download CMake 3.1.0"
+        COMMENT "Download CMake ${version}"
     )
-else()
-    set(CMAKE_310_BINARY ${PROJECT_BINARY_DIR}/cmake-3.1.0-Linux-x86_64/bin/cmake)
-    add_custom_command(
-        OUTPUT ${CMAKE_310_BINARY}
-        COMMAND wget https://github.com/Kitware/CMake/releases/download/v3.1.0/cmake-3.1.0-Linux-x86_64.tar.gz
-        COMMAND tar xfz cmake-3.1.0-Linux-x86_64.tar.gz
-        COMMAND rm cmake-3.1.0-Linux-x86_64.tar.gz
-        WORKING_DIRECTORY ${PROJECT_BINARY_DIR}
-        COMMENT "Download CMake 3.1.0"
-    )
-endif()
+    set(${var} ${${var}} PARENT_SCOPE)
+endfunction()
 
-set(JSON_CMAKE_FLAGS "JSON_BuildTests;JSON_Install;JSON_MultipleHeaders;JSON_ImplicitConversions;JSON_Valgrind;JSON_Diagnostics;JSON_SystemInclude")
+ci_get_cmake(3.1.0 CMAKE_3_1_0_BINARY)
+ci_get_cmake(3.13.0 CMAKE_3_13_0_BINARY)
 
-foreach(JSON_CMAKE_FLAG ${JSON_CMAKE_FLAGS})
-    string(TOLOWER "ci_cmake_flag_${JSON_CMAKE_FLAG}" JSON_CMAKE_FLAG_TARGET)
-    add_custom_target("${JSON_CMAKE_FLAG_TARGET}"
-        COMMENT "Check CMake flag ${JSON_CMAKE_FLAG} (CMake ${CMAKE_VERSION})"
+set(JSON_CMAKE_FLAGS_3_1_0 JSON_Diagnostics JSON_Diagnostic_Positions JSON_GlobalUDLs JSON_ImplicitConversions JSON_DisableEnumSerialization
+    JSON_LegacyDiscardedValueComparison JSON_Install JSON_MultipleHeaders JSON_SystemInclude JSON_Valgrind)
+set(JSON_CMAKE_FLAGS_3_13_0 JSON_BuildTests)
+
+function(ci_add_cmake_flags_targets flag min_version)
+    string(TOLOWER "ci_cmake_flag_${flag}" flag_target)
+    string(REPLACE . _ min_version_var ${min_version})
+    set(cmake_binary ${CMAKE_${min_version_var}_BINARY})
+    add_custom_target(${flag_target}
+        COMMENT "Check CMake flag ${flag} (CMake ${CMAKE_VERSION})"
         COMMAND ${CMAKE_COMMAND}
             -Werror=dev
-            -D${JSON_CMAKE_FLAG}=ON
-            -S${PROJECT_SOURCE_DIR} -B${PROJECT_BINARY_DIR}/build_${JSON_CMAKE_FLAG_TARGET}
+            -D${flag}=ON
+            -S${PROJECT_SOURCE_DIR} -B${PROJECT_BINARY_DIR}/build_${flag_target}
     )
-    add_custom_target("${JSON_CMAKE_FLAG_TARGET}_31"
-        COMMENT "Check CMake flag ${JSON_CMAKE_FLAG} (CMake 3.1)"
-        COMMAND mkdir ${PROJECT_BINARY_DIR}/build_${JSON_CMAKE_FLAG_TARGET}_31
-        COMMAND cd ${PROJECT_BINARY_DIR}/build_${JSON_CMAKE_FLAG_TARGET}_31 && ${CMAKE_310_BINARY}
-            -Werror=dev ${PROJECT_SOURCE_DIR}
-            -D${JSON_CMAKE_FLAG}=ON
-            -DCMAKE_CXX_COMPILE_FEATURES="cxx_range_for" -DCMAKE_CXX_FLAGS="-std=gnu++11"
-        DEPENDS ${CMAKE_310_BINARY}
+    add_custom_target(${flag_target}_${min_version_var}
+        COMMENT "Check CMake flag ${JSON_CMAKE_FLAG} (CMake ${min_version})"
+        COMMAND mkdir -pv ${PROJECT_BINARY_DIR}/build_${flag_target}_${min_version_var}
+        COMMAND cd ${PROJECT_BINARY_DIR}/build_${flag_target}_${min_version_var}
+            && ${cmake_binary} -Werror=dev ${PROJECT_SOURCE_DIR} -D${flag}=ON
+        DEPENDS ${cmake_binary}
     )
-    list(APPEND JSON_CMAKE_FLAG_TARGETS ${JSON_CMAKE_FLAG_TARGET} ${JSON_CMAKE_FLAG_TARGET}_31)
-    list(APPEND JSON_CMAKE_FLAG_BUILD_DIRS ${PROJECT_BINARY_DIR}/build_${JSON_CMAKE_FLAG_TARGET} ${PROJECT_BINARY_DIR}/build_${JSON_CMAKE_FLAG_TARGET}_31)
+    list(APPEND JSON_CMAKE_FLAG_TARGETS ${JSON_CMAKE_FLAG_TARGET} ${flag_target}_${min_version_var})
+    list(APPEND JSON_CMAKE_FLAG_BUILD_DIRS ${PROJECT_BINARY_DIR}/build_${flag_target} ${PROJECT_BINARY_DIR}/build_${flag_target}_${min_version_var})
+    set(JSON_CMAKE_FLAG_TARGETS ${JSON_CMAKE_FLAG_TARGETS} PARENT_SCOPE)
+    set(JSON_CMAKE_FLAG_BUILD_DIRS ${JSON_CMAKE_FLAG_BUILD_DIRS} PARENT_SCOPE)
+endfunction()
+
+foreach(JSON_CMAKE_FLAG ${JSON_CMAKE_FLAGS_3_1_0})
+    ci_add_cmake_flags_targets(${JSON_CMAKE_FLAG} 3.1.0)
+endforeach()
+
+foreach(JSON_CMAKE_FLAG ${JSON_CMAKE_FLAGS_3_13_0})
+    ci_add_cmake_flags_targets(${JSON_CMAKE_FLAG} 3.13.0)
 endforeach()
 
 add_custom_target(ci_cmake_flags
@@ -811,14 +604,17 @@ add_custom_target(ci_cmake_flags
 # Use more installed compilers.
 ###############################################################################
 
-foreach(COMPILER g++-4.8 g++-4.9 g++-5 g++-7 g++-8 g++-9 g++-10 clang++-3.5 clang++-3.6 clang++-3.7 clang++-3.8 clang++-3.9 clang++-4.0 clang++-5.0 clang++-6.0 clang++-7 clang++-8 clang++-9 clang++-10 clang++-11 clang++-12)
+foreach(COMPILER g++-4.8 g++-4.9 g++-5 g++-6 g++-7 g++-8 g++-9 g++-10 g++-11 clang++-3.5 clang++-3.6 clang++-3.7 clang++-3.8 clang++-3.9 clang++-4.0 clang++-5.0 clang++-6.0 clang++-7 clang++-8 clang++-9 clang++-10 clang++-11 clang++-12 clang++-13 clang++-14 clang++-15 clang++-16 clang++-17 clang++-18 clang++-19 clang++-20)
     find_program(COMPILER_TOOL NAMES ${COMPILER})
     if (COMPILER_TOOL)
+        unset(ADDITIONAL_FLAGS)
+
         add_custom_target(ci_test_compiler_${COMPILER}
             COMMAND CXX=${COMPILER} ${CMAKE_COMMAND}
                 -DCMAKE_BUILD_TYPE=Debug -GNinja
                 -DJSON_BuildTests=ON -DJSON_FastTests=ON
                 -S${PROJECT_SOURCE_DIR} -B${PROJECT_BINARY_DIR}/build_compiler_${COMPILER}
+                ${ADDITIONAL_FLAGS}
             COMMAND ${CMAKE_COMMAND} --build ${PROJECT_BINARY_DIR}/build_compiler_${COMPILER}
             COMMAND cd ${PROJECT_BINARY_DIR}/build_compiler_${COMPILER} && ${CMAKE_CTEST_COMMAND} --parallel ${N} --exclude-regex "test-unicode" --output-on-failure
             COMMENT "Compile and test with ${COMPILER}"
@@ -827,6 +623,73 @@ foreach(COMPILER g++-4.8 g++-4.9 g++-5 g++-7 g++-8 g++-9 g++-10 clang++-3.5 clan
     unset(COMPILER_TOOL CACHE)
 endforeach()
 
+add_custom_target(ci_test_compiler_default
+    COMMAND ${CMAKE_COMMAND}
+        -DCMAKE_BUILD_TYPE=Debug -GNinja
+        -DJSON_BuildTests=ON -DJSON_FastTests=ON
+        -S${PROJECT_SOURCE_DIR} -B${PROJECT_BINARY_DIR}/build_compiler_default
+        ${ADDITIONAL_FLAGS}
+    COMMAND ${CMAKE_COMMAND} --build ${PROJECT_BINARY_DIR}/build_compiler_default --parallel ${N}
+    COMMAND cd ${PROJECT_BINARY_DIR}/build_compiler_default && ${CMAKE_CTEST_COMMAND} --parallel ${N} --exclude-regex "test-unicode" -LE git_required --output-on-failure
+    COMMENT "Compile and test with default C++ compiler"
+)
+
+###############################################################################
+# CUDA example
+###############################################################################
+
+add_custom_target(ci_cuda_example
+    COMMAND ${CMAKE_COMMAND}
+        -DCMAKE_BUILD_TYPE=Debug -GNinja
+        -DCMAKE_CUDA_HOST_COMPILER=g++-8
+        -S${PROJECT_SOURCE_DIR}/tests/cuda_example -B${PROJECT_BINARY_DIR}/build_cuda_example
+    COMMAND ${CMAKE_COMMAND} --build ${PROJECT_BINARY_DIR}/build_cuda_example
+)
+
+###############################################################################
+# Intel C++ Compiler
+###############################################################################
+
+add_custom_target(ci_icpc
+    COMMAND ${CMAKE_COMMAND}
+        -DCMAKE_BUILD_TYPE=Debug -GNinja
+        -DCMAKE_C_COMPILER=icc -DCMAKE_CXX_COMPILER=icpc
+        -DJSON_BuildTests=ON -DJSON_FastTests=ON
+        -S${PROJECT_SOURCE_DIR} -B${PROJECT_BINARY_DIR}/build_icpc
+    COMMAND ${CMAKE_COMMAND} --build ${PROJECT_BINARY_DIR}/build_icpc
+    COMMAND cd ${PROJECT_BINARY_DIR}/build_icpc && ${CMAKE_CTEST_COMMAND} --parallel ${N} --exclude-regex "test-unicode" --output-on-failure
+    COMMENT "Compile and test with ICPC"
+)
+
+###############################################################################
+# REUSE
+###############################################################################
+
+add_custom_target(ci_reuse_compliance
+    COMMAND ${Python3_EXECUTABLE} -mvenv venv_reuse
+    COMMAND venv_reuse/bin/pip3 --quiet install -r ${PROJECT_SOURCE_DIR}/cmake/requirements/requirements-reuse.txt
+    COMMAND venv_reuse/bin/reuse --root ${PROJECT_SOURCE_DIR} lint
+    COMMENT "Check REUSE specification compliance"
+)
+
+###############################################################################
+# test documentation
+###############################################################################
+
+add_custom_target(ci_test_examples
+    COMMAND make CXX="${GCC_TOOL}" check_output_portable -j8
+    WORKING_DIRECTORY ${PROJECT_SOURCE_DIR}/docs
+    COMMENT "Check that all examples compile and create the desired output"
+)
+
+add_custom_target(ci_test_build_documentation
+    COMMAND ${Python3_EXECUTABLE} -mvenv venv
+    COMMAND venv/bin/pip3 --quiet install -r requirements.txt
+    COMMAND make build
+    WORKING_DIRECTORY ${PROJECT_SOURCE_DIR}/docs/mkdocs
+    COMMENT "Build the documentation"
+)
+
 ###############################################################################
 # Clean up all generated files.
 ###############################################################################

cmake/clang_flags.cmake

@@ -0,0 +1,20 @@
+# Ignored Clang warnings:
+# -Wno-c++98-compat               The library targets C++11.
+# -Wno-c++98-compat-pedantic      The library targets C++11.
+# -Wno-deprecated-declarations    The library contains annotations for deprecated functions.
+# -Wno-extra-semi-stmt            The library uses assert which triggers this warning.
+# -Wno-padded                     We do not care about padding warnings.
+# -Wno-covered-switch-default     All switches list all cases and a default case.
+# -Wno-unsafe-buffer-usage        Otherwise Doctest would not compile.
+
+set(CLANG_CXXFLAGS
+    -Werror
+    -Weverything
+    -Wno-c++98-compat
+    -Wno-c++98-compat-pedantic
+    -Wno-deprecated-declarations
+    -Wno-extra-semi-stmt
+    -Wno-padded
+    -Wno-covered-switch-default
+    -Wno-unsafe-buffer-usage
+)

cmake/download_test_data.cmake

@@ -1,5 +1,5 @@
 set(JSON_TEST_DATA_URL     https://github.com/nlohmann/json_test_data)
-set(JSON_TEST_DATA_VERSION 3.0.0)
+set(JSON_TEST_DATA_VERSION 3.1.0)
 
 # if variable is set, use test data from given directory rather than downloading them
 if(JSON_TestDataDirectory)

cmake/gcc_flags.cmake

@@ -0,0 +1,348 @@
+# Warning flags determined for GCC 14.2.0 with https://github.com/nlohmann/gcc_flags:
+# Ignored GCC warnings:
+# -Wno-abi-tag                    We do not care about ABI tags.
+# -Wno-aggregate-return           The library uses aggregate returns.
+# -Wno-long-long                  The library uses the long long type to interface with system functions.
+# -Wno-namespaces                 The library uses namespaces.
+# -Wno-nrvo                       Doctest triggers this warning.
+# -Wno-padded                     We do not care about padding warnings.
+# -Wno-system-headers             We do not care about warnings in system headers.
+# -Wno-templates                  The library uses templates.
+
+set(GCC_CXXFLAGS
+    -pedantic
+    -Werror
+    --all-warnings
+    --extra-warnings
+    -W
+    -WNSObject-attribute
+    -Wno-abi-tag
+    -Waddress
+    -Waddress-of-packed-member
+    -Wno-aggregate-return
+    -Waggressive-loop-optimizations
+    -Waligned-new=all
+    -Wall
+    -Walloc-size
+    -Walloc-zero
+    -Walloca
+    -Wanalyzer-allocation-size
+    -Wanalyzer-deref-before-check
+    -Wanalyzer-double-fclose
+    -Wanalyzer-double-free
+    -Wanalyzer-exposure-through-output-file
+    -Wanalyzer-exposure-through-uninit-copy
+    -Wanalyzer-fd-access-mode-mismatch
+    -Wanalyzer-fd-double-close
+    -Wanalyzer-fd-leak
+    -Wanalyzer-fd-phase-mismatch
+    -Wanalyzer-fd-type-mismatch
+    -Wanalyzer-fd-use-after-close
+    -Wanalyzer-fd-use-without-check
+    -Wanalyzer-file-leak
+    -Wanalyzer-free-of-non-heap
+    -Wanalyzer-imprecise-fp-arithmetic
+    -Wanalyzer-infinite-loop
+    -Wanalyzer-infinite-recursion
+    -Wanalyzer-jump-through-null
+    -Wanalyzer-malloc-leak
+    -Wanalyzer-mismatching-deallocation
+    -Wanalyzer-null-argument
+    -Wanalyzer-null-dereference
+    -Wanalyzer-out-of-bounds
+    -Wanalyzer-overlapping-buffers
+    -Wanalyzer-possible-null-argument
+    -Wanalyzer-possible-null-dereference
+    -Wanalyzer-putenv-of-auto-var
+    -Wanalyzer-shift-count-negative
+    -Wanalyzer-shift-count-overflow
+    -Wanalyzer-stale-setjmp-buffer
+    -Wanalyzer-symbol-too-complex
+    -Wanalyzer-tainted-allocation-size
+    -Wanalyzer-tainted-array-index
+    -Wanalyzer-tainted-assertion
+    -Wanalyzer-tainted-divisor
+    -Wanalyzer-tainted-offset
+    -Wanalyzer-tainted-size
+    -Wanalyzer-too-complex
+    -Wanalyzer-undefined-behavior-strtok
+    -Wanalyzer-unsafe-call-within-signal-handler
+    -Wanalyzer-use-after-free
+    -Wanalyzer-use-of-pointer-in-stale-stack-frame
+    -Wanalyzer-use-of-uninitialized-value
+    -Wanalyzer-va-arg-type-mismatch
+    -Wanalyzer-va-list-exhausted
+    -Wanalyzer-va-list-leak
+    -Wanalyzer-va-list-use-after-va-end
+    -Wanalyzer-write-to-const
+    -Wanalyzer-write-to-string-literal
+    -Warith-conversion
+    -Warray-bounds=2
+    -Warray-compare
+    -Warray-parameter=2
+    -Wattribute-alias=2
+    -Wattribute-warning
+    -Wattributes
+    -Wbool-compare
+    -Wbool-operation
+    -Wbuiltin-declaration-mismatch
+    -Wbuiltin-macro-redefined
+    -Wc++0x-compat
+    -Wc++11-compat
+    -Wc++11-extensions
+    -Wc++14-compat
+    -Wc++14-extensions
+    -Wc++17-compat
+    -Wc++17-extensions
+    -Wc++1z-compat
+    -Wc++20-compat
+    -Wc++20-extensions
+    -Wc++23-extensions
+    -Wc++26-extensions
+    -Wc++2a-compat
+    -Wcalloc-transposed-args
+    -Wcannot-profile
+    -Wcast-align
+    -Wcast-align=strict
+    -Wcast-function-type
+    -Wcast-qual
+    -Wcast-user-defined
+    -Wcatch-value=3
+    -Wchanges-meaning
+    -Wchar-subscripts
+    -Wclass-conversion
+    -Wclass-memaccess
+    -Wclobbered
+    -Wcomma-subscript
+    -Wcomment
+    -Wcomments
+    -Wcomplain-wrong-lang
+    -Wconditionally-supported
+    -Wconversion
+    -Wconversion-null
+    -Wcoverage-invalid-line-number
+    -Wcoverage-mismatch
+    -Wcoverage-too-many-conditions
+    -Wcpp
+    -Wctad-maybe-unsupported
+    -Wctor-dtor-privacy
+    -Wdangling-else
+    -Wdangling-pointer=2
+    -Wdangling-reference
+    -Wdate-time
+    -Wdelete-incomplete
+    -Wdelete-non-virtual-dtor
+    -Wdeprecated
+    -Wdeprecated-copy
+    -Wdeprecated-copy-dtor
+    -Wdeprecated-declarations
+    -Wdeprecated-enum-enum-conversion
+    -Wdeprecated-enum-float-conversion
+    -Wdisabled-optimization
+    -Wdiv-by-zero
+    -Wdouble-promotion
+    -Wduplicated-branches
+    -Wduplicated-cond
+    -Weffc++
+    -Welaborated-enum-base
+    -Wempty-body
+    -Wendif-labels
+    -Wenum-compare
+    -Wenum-conversion
+    -Wexceptions
+    -Wexpansion-to-defined
+    -Wextra
+    -Wextra-semi
+    -Wflex-array-member-not-at-end
+    -Wfloat-conversion
+    -Wfloat-equal
+    -Wformat -Wformat-contains-nul
+    -Wformat -Wformat-extra-args
+    -Wformat -Wformat-nonliteral
+    -Wformat -Wformat-security
+    -Wformat -Wformat-y2k
+    -Wformat -Wformat-zero-length
+    -Wformat-diag
+    -Wformat-overflow=2
+    -Wformat-signedness
+    -Wformat-truncation=2
+    -Wformat=2
+    -Wframe-address
+    -Wfree-nonheap-object
+    -Wglobal-module
+    -Whardened
+    -Whsa
+    -Wif-not-aligned
+    -Wignored-attributes
+    -Wignored-qualifiers
+    -Wimplicit-fallthrough=5
+    -Winaccessible-base
+    -Winfinite-recursion
+    -Winherited-variadic-ctor
+    -Winit-list-lifetime
+    -Winit-self
+    -Winline
+    -Wint-in-bool-context
+    -Wint-to-pointer-cast
+    -Winterference-size
+    -Winvalid-constexpr
+    -Winvalid-imported-macros
+    -Winvalid-memory-model
+    -Winvalid-offsetof
+    -Winvalid-pch
+    -Winvalid-utf8
+    -Wliteral-suffix
+    -Wlogical-not-parentheses
+    -Wlogical-op
+    -Wno-long-long
+    -Wlto-type-mismatch
+    -Wmain
+    -Wmaybe-uninitialized
+    -Wmemset-elt-size
+    -Wmemset-transposed-args
+    -Wmisleading-indentation
+    -Wmismatched-dealloc
+    -Wmismatched-new-delete
+    -Wmismatched-tags
+    -Wmissing-attributes
+    -Wmissing-braces
+    -Wmissing-declarations
+    -Wmissing-field-initializers
+    -Wmissing-include-dirs
+    -Wmissing-profile
+    -Wmissing-requires
+    -Wmissing-template-keyword
+    -Wmultichar
+    -Wmultiple-inheritance
+    -Wmultistatement-macros
+    -Wno-namespaces
+    -Wnarrowing
+    -Wnoexcept
+    -Wnoexcept-type
+    -Wnon-template-friend
+    -Wnon-virtual-dtor
+    -Wnonnull
+    -Wnonnull-compare
+    -Wnormalized=nfkc
+    -Wno-nrvo
+    -Wnull-dereference
+    -Wodr
+    -Wold-style-cast
+    -Wopenacc-parallelism
+    -Wopenmp
+    -Wopenmp-simd
+    -Woverflow
+    -Woverlength-strings
+    -Woverloaded-virtual=2
+    -Wpacked
+    -Wpacked-bitfield-compat
+    -Wpacked-not-aligned
+    -Wno-padded
+    -Wparentheses
+    -Wpedantic
+    -Wpessimizing-move
+    -Wplacement-new=2
+    -Wpmf-conversions
+    -Wpointer-arith
+    -Wpointer-compare
+    -Wpragmas
+    -Wprio-ctor-dtor
+    -Wpsabi
+    -Wrange-loop-construct
+    -Wredundant-decls
+    -Wredundant-move
+    -Wredundant-tags
+    -Wregister
+    -Wreorder
+    -Wrestrict
+    -Wreturn-local-addr
+    -Wreturn-type
+    -Wscalar-storage-order
+    -Wself-move
+    -Wsequence-point
+    -Wshadow=compatible-local
+    -Wshadow=global
+    -Wshadow=local
+    -Wshift-count-negative
+    -Wshift-count-overflow
+    -Wshift-negative-value
+    -Wshift-overflow=2
+    -Wsign-compare
+    -Wsign-conversion
+    -Wsign-promo
+    -Wsized-deallocation
+    -Wsizeof-array-argument
+    -Wsizeof-array-div
+    -Wsizeof-pointer-div
+    -Wsizeof-pointer-memaccess
+    -Wstack-protector
+    -Wstrict-aliasing=3
+    -Wstrict-null-sentinel
+    -Wstrict-overflow
+    -Wstring-compare
+    -Wstringop-overflow=4
+    -Wstringop-overread
+    -Wstringop-truncation
+    -Wsubobject-linkage
+    -Wsuggest-attribute=cold
+    -Wsuggest-attribute=const
+    -Wsuggest-attribute=format
+    -Wsuggest-attribute=malloc
+    -Wsuggest-attribute=noreturn
+    -Wsuggest-attribute=pure
+    -Wsuggest-attribute=returns_nonnull
+    -Wsuggest-final-methods
+    -Wsuggest-final-types
+    -Wsuggest-override
+    -Wswitch
+    -Wswitch-bool
+    -Wswitch-default
+    -Wswitch-enum
+    -Wswitch-outside-range
+    -Wswitch-unreachable
+    -Wsync-nand
+    -Wsynth
+    -Wno-system-headers
+    -Wtautological-compare
+    -Wno-templates
+    -Wterminate
+    -Wtrampolines
+    -Wtrigraphs
+    -Wtrivial-auto-var-init
+    -Wtsan
+    -Wtype-limits
+    -Wundef
+    -Wunicode
+    -Wuninitialized
+    -Wunknown-pragmas
+    -Wunreachable-code
+    -Wunsafe-loop-optimizations
+    -Wunused
+    -Wunused-but-set-parameter
+    -Wunused-but-set-variable
+    -Wunused-const-variable=2
+    -Wunused-function
+    -Wunused-label
+    -Wunused-local-typedefs
+    -Wunused-macros
+    -Wunused-parameter
+    -Wunused-result
+    -Wunused-value
+    -Wunused-variable
+    -Wuse-after-free=3
+    -Wuseless-cast
+    -Wvarargs
+    -Wvariadic-macros
+    -Wvector-operation-performance
+    -Wvexing-parse
+    -Wvirtual-inheritance
+    -Wvirtual-move-assign
+    -Wvla
+    -Wvla-parameter
+    -Wvolatile
+    -Wvolatile-register-var
+    -Wwrite-strings
+    -Wxor-used-as-pow
+    -Wzero-as-null-pointer-constant
+    -Wzero-length-bounds
+)

cmake/pkg-config.pc.in

@@ -1,4 +1,7 @@
-Name: ${PROJECT_NAME}
+prefix=@CMAKE_INSTALL_PREFIX@
+includedir=${prefix}/@CMAKE_INSTALL_INCLUDEDIR@
+
+Name: @PROJECT_NAME@
 Description: JSON for Modern C++
-Version: ${PROJECT_VERSION}
-Cflags: -I${CMAKE_INSTALL_FULL_INCLUDEDIR}
+Version: @PROJECT_VERSION@
+Cflags: -I${includedir}

cmake/requirements/requirements-cppcheck.txt

@@ -0,0 +1 @@
+cppcheck==1.4.7

cmake/requirements/requirements-cpplint.txt

@@ -0,0 +1 @@
+cpplint==2.0.0

cmake/requirements/requirements-reuse.txt

@@ -0,0 +1 @@
+reuse==5.0.2

cmake/scripts/gen_bazel_build_file.cmake

@@ -0,0 +1,24 @@
+# generate Bazel BUILD file
+
+set(PROJECT_ROOT "${CMAKE_CURRENT_LIST_DIR}/../..")
+set(BUILD_FILE "${PROJECT_ROOT}/BUILD.bazel")
+
+file(GLOB_RECURSE HEADERS LIST_DIRECTORIES false RELATIVE "${PROJECT_ROOT}" "include/*.hpp")
+
+file(WRITE "${BUILD_FILE}" [=[
+cc_library(
+    name = "json",
+    hdrs = [
+]=])
+
+foreach(header ${HEADERS})
+    file(APPEND "${BUILD_FILE}" "        \"${header}\",\n")
+endforeach()
+
+file(APPEND "${BUILD_FILE}" [=[
+    ],
+    includes = ["include"],
+    visibility = ["//visibility:public"],
+    alwayslink = True,
+)
+]=])

cmake/test.cmake

@@ -0,0 +1,273 @@
+set(_json_test_cmake_list_file ${CMAKE_CURRENT_LIST_FILE})
+
+#############################################################################
+# download test data
+#############################################################################
+
+include(download_test_data)
+
+# test fixture to download test data
+add_test(NAME "download_test_data" COMMAND ${CMAKE_COMMAND} --build ${CMAKE_BINARY_DIR}
+    --target download_test_data
+)
+set_tests_properties(download_test_data PROPERTIES FIXTURES_SETUP TEST_DATA)
+
+if(JSON_Valgrind)
+    find_program(CMAKE_MEMORYCHECK_COMMAND valgrind)
+    message(STATUS "Executing test suite with Valgrind (${CMAKE_MEMORYCHECK_COMMAND})")
+    set(memcheck_command "${CMAKE_MEMORYCHECK_COMMAND} ${CMAKE_MEMORYCHECK_COMMAND_OPTIONS} --error-exitcode=1 --leak-check=full")
+    separate_arguments(memcheck_command)
+endif()
+
+#############################################################################
+# detect standard support
+#############################################################################
+
+# C++11 is the minimum required
+set(compiler_supports_cpp_11 TRUE)
+
+foreach(feature ${CMAKE_CXX_COMPILE_FEATURES})
+    if (${feature} STREQUAL cxx_std_14)
+        set(compiler_supports_cpp_14 TRUE)
+    elseif (${feature} STREQUAL cxx_std_17)
+        set(compiler_supports_cpp_17 TRUE)
+    elseif (${feature} STREQUAL cxx_std_20)
+        set(compiler_supports_cpp_20 TRUE)
+    elseif (${feature} STREQUAL cxx_std_23)
+        set(compiler_supports_cpp_23 TRUE)
+    endif()
+endforeach()
+
+#############################################################################
+# test functions
+#############################################################################
+
+#############################################################################
+# json_test_set_test_options(
+#     all|<tests>
+#     [CXX_STANDARDS all|<args>...]
+#     [COMPILE_DEFINITIONS <args>...]
+#     [COMPILE_FEATURES <args>...]
+#     [COMPILE_OPTIONS <args>...]
+#     [LINK_LIBRARIES <args>...]
+#     [LINK_OPTIONS <args>...]
+#     [TEST_PROPERTIES <args>...])
+#
+# Supply test- and standard-specific build settings and/or test properties.
+# Specify multiple tests using a list e.g., "test-foo;test-bar".
+#
+# Must be called BEFORE the test is created.
+#############################################################################
+
+function(json_test_set_test_options tests)
+    cmake_parse_arguments(args "" ""
+        "CXX_STANDARDS;COMPILE_DEFINITIONS;COMPILE_FEATURES;COMPILE_OPTIONS;LINK_LIBRARIES;LINK_OPTIONS;TEST_PROPERTIES"
+        ${ARGN})
+
+    if(NOT args_CXX_STANDARDS)
+        set(args_CXX_STANDARDS "all")
+    endif()
+
+    foreach(test ${tests})
+        if("${test}" STREQUAL "all")
+            set(test "")
+        endif()
+
+        foreach(cxx_standard ${args_CXX_STANDARDS})
+            if("${cxx_standard}" STREQUAL "all")
+                if("${test}" STREQUAL "")
+                    message(FATAL_ERROR "Not supported. Change defaults in: ${_json_test_cmake_list_file}")
+                endif()
+                set(test_interface _json_test_interface_${test})
+            else()
+                set(test_interface _json_test_interface_${test}_cpp_${cxx_standard})
+            endif()
+
+            if(NOT TARGET ${test_interface})
+                add_library(${test_interface} INTERFACE)
+            endif()
+
+            target_compile_definitions(${test_interface} INTERFACE ${args_COMPILE_DEFINITIONS})
+            target_compile_features(${test_interface} INTERFACE ${args_COMPILE_FEATURES})
+            target_compile_options(${test_interface} INTERFACE ${args_COMPILE_OPTIONS})
+            target_link_libraries (${test_interface} INTERFACE ${args_LINK_LIBRARIES})
+            target_link_options(${test_interface} INTERFACE ${args_LINK_OPTIONS})
+            #set_target_properties(${test_interface} PROPERTIES JSON_TEST_PROPERTIES "${args_TEST_PROPERTIES}")
+            set_property(DIRECTORY PROPERTY
+                ${test_interface}_TEST_PROPERTIES "${args_TEST_PROPERTIES}"
+            )
+        endforeach()
+    endforeach()
+endfunction()
+
+# for internal use by _json_test_add_test()
+function(_json_test_apply_test_properties test_target properties_target)
+    #get_target_property(test_properties ${properties_target} JSON_TEST_PROPERTIES)
+    get_property(test_properties DIRECTORY PROPERTY ${properties_target}_TEST_PROPERTIES)
+    if(test_properties)
+        set_tests_properties(${test_target} PROPERTIES ${test_properties})
+    endif()
+endfunction()
+
+# for internal use by json_test_add_test_for()
+function(_json_test_add_test test_name file main cxx_standard)
+    set(test_target ${test_name}_cpp${cxx_standard})
+
+    if(TARGET ${test_target})
+        message(FATAL_ERROR "Target ${test_target} has already been added.")
+    endif()
+
+    add_executable(${test_target} ${file})
+    target_link_libraries(${test_target} PRIVATE ${main})
+
+    # set and require C++ standard
+    set_target_properties(${test_target} PROPERTIES
+        CXX_STANDARD ${cxx_standard}
+        CXX_STANDARD_REQUIRED ON
+    )
+
+    # apply standard-specific build settings
+    if(TARGET _json_test_interface__cpp_${cxx_standard})
+        target_link_libraries(${test_target} PRIVATE _json_test_interface__cpp_${cxx_standard})
+    endif()
+
+    # apply test-specific build settings
+    if(TARGET _json_test_interface_${test_name})
+        target_link_libraries(${test_target} PRIVATE _json_test_interface_${test_name})
+    endif()
+
+    # apply test- and standard-specific build settings
+    if(TARGET _json_test_interface_${test_name}_cpp_${cxx_standard})
+        target_link_libraries(${test_target} PRIVATE
+            _json_test_interface_${test_name}_cpp_${cxx_standard}
+        )
+    endif()
+
+    if (JSON_FastTests)
+        add_test(NAME ${test_target}
+            COMMAND ${test_target} ${DOCTEST_TEST_FILTER}
+            WORKING_DIRECTORY ${CMAKE_SOURCE_DIR}
+        )
+    else()
+        add_test(NAME ${test_target}
+            COMMAND ${test_target} ${DOCTEST_TEST_FILTER} --no-skip
+            WORKING_DIRECTORY ${CMAKE_SOURCE_DIR}
+        )
+    endif()
+    set_tests_properties(${test_target} PROPERTIES LABELS "all" FIXTURES_REQUIRED TEST_DATA)
+
+    # apply standard-specific test properties
+    if(TARGET _json_test_interface__cpp_${cxx_standard})
+        _json_test_apply_test_properties(${test_target} _json_test_interface__cpp_${cxx_standard})
+    endif()
+
+    # apply test-specific test properties
+    if(TARGET _json_test_interface_${test_name})
+        _json_test_apply_test_properties(${test_target} _json_test_interface_${test_name})
+    endif()
+
+    # apply test- and standard-specific test properties
+    if(TARGET _json_test_interface_${test_name}_cpp_${cxx_standard})
+        _json_test_apply_test_properties(${test_target}
+            _json_test_interface_${test_name}_cpp_${cxx_standard}
+        )
+    endif()
+
+    if(JSON_Valgrind)
+        add_test(NAME ${test_target}_valgrind
+            COMMAND ${memcheck_command} $<TARGET_FILE:${test_target}> ${DOCTEST_TEST_FILTER}
+            WORKING_DIRECTORY ${CMAKE_SOURCE_DIR}
+        )
+        set_tests_properties(${test_target}_valgrind PROPERTIES
+            LABELS "valgrind" FIXTURES_REQUIRED TEST_DATA
+        )
+    endif()
+endfunction()
+
+#############################################################################
+# json_test_add_test_for(
+#     <file>
+#     [NAME <name>]
+#     MAIN <main>
+#     [CXX_STANDARDS <version_number>...] [FORCE])
+#
+# Given a <file> unit-foo.cpp, produces
+#
+#     test-foo_cpp<version_number>
+#
+# if C++ standard <version_number> is supported by the compiler and the
+# source file contains JSON_HAS_CPP_<version_number>.
+# Use NAME <name> to override the filename-derived test name.
+# Use FORCE to create the test regardless of the file containing
+# JSON_HAS_CPP_<version_number>.
+# Test targets are linked against <main>.
+# CXX_STANDARDS defaults to "11".
+#############################################################################
+
+function(json_test_add_test_for file)
+    cmake_parse_arguments(args "FORCE" "MAIN;NAME" "CXX_STANDARDS" ${ARGN})
+
+    if("${args_MAIN}" STREQUAL "")
+        message(FATAL_ERROR "Required argument MAIN <main> missing.")
+    endif()
+
+    if("${args_NAME}" STREQUAL "")
+        get_filename_component(file_basename ${file} NAME_WE)
+        string(REGEX REPLACE "unit-([^$]+)" "test-\\1" test_name ${file_basename})
+    else()
+        set(test_name ${args_NAME})
+        if(NOT test_name MATCHES "test-[^$]+")
+            message(FATAL_ERROR "Test name must start with 'test-'.")
+        endif()
+    endif()
+
+    if("${args_CXX_STANDARDS}" STREQUAL "")
+        set(args_CXX_STANDARDS 11)
+    endif()
+
+    file(READ ${file} file_content)
+    foreach(cxx_standard ${args_CXX_STANDARDS})
+        if(NOT compiler_supports_cpp_${cxx_standard})
+            continue()
+        endif()
+
+        # add unconditionally if C++11 (default) or forced
+        if(NOT ("${cxx_standard}" STREQUAL 11 OR args_FORCE))
+            string(FIND "${file_content}" JSON_HAS_CPP_${cxx_standard} has_cpp_found)
+            if(${has_cpp_found} EQUAL -1)
+                continue()
+            endif()
+        endif()
+
+        _json_test_add_test(${test_name} ${file} ${args_MAIN} ${cxx_standard})
+    endforeach()
+endfunction()
+
+#############################################################################
+# json_test_should_build_32bit_test(
+#     <build_32bit_var> <build_32bit_only_var> <input>)
+#
+# Check if the 32bit unit test should be built based on the value of <input>
+# and store the result in the variables <build_32bit_var> and
+# <build_32bit_only_var>.
+#############################################################################
+
+function(json_test_should_build_32bit_test build_32bit_var build_32bit_only_var input)
+    set(${build_32bit_only_var} OFF PARENT_SCOPE)
+    string(TOUPPER "${input}" ${build_32bit_var})
+    if("${${build_32bit_var}}" STREQUAL AUTO)
+        # check if compiler is targeting 32bit by default
+        include(CheckTypeSize)
+        check_type_size("size_t" sizeof_size_t LANGUAGE CXX)
+        if(${sizeof_size_t} AND ${sizeof_size_t} EQUAL 4)
+            message(STATUS "Auto-enabling 32bit unit test.")
+            set(${build_32bit_var} ON)
+        else()
+            set(${build_32bit_var} OFF)
+        endif()
+    elseif("${${build_32bit_var}}" STREQUAL ONLY)
+        set(${build_32bit_only_var} ON PARENT_SCOPE)
+    endif()
+
+    set(${build_32bit_var} "${${build_32bit_var}}" PARENT_SCOPE)
+endfunction()

doc/Doxyfile

@@ -1,335 +0,0 @@
-# Doxyfile 1.9.1
-
-#---------------------------------------------------------------------------
-# Project related configuration options
-#---------------------------------------------------------------------------
-DOXYFILE_ENCODING      = UTF-8
-PROJECT_NAME           = "JSON for Modern C++"
-PROJECT_NUMBER         = 3.10.4
-PROJECT_BRIEF          =
-PROJECT_LOGO           =
-OUTPUT_DIRECTORY       = .
-CREATE_SUBDIRS         = NO
-ALLOW_UNICODE_NAMES    = NO
-OUTPUT_LANGUAGE        = English
-OUTPUT_TEXT_DIRECTION  = None
-BRIEF_MEMBER_DESC      = YES
-REPEAT_BRIEF           = NO
-ABBREVIATE_BRIEF       =
-ALWAYS_DETAILED_SEC    = YES
-INLINE_INHERITED_MEMB  = NO
-FULL_PATH_NAMES        = YES
-STRIP_FROM_PATH        =
-STRIP_FROM_INC_PATH    =
-SHORT_NAMES            = NO
-JAVADOC_AUTOBRIEF      = NO
-JAVADOC_BANNER         = NO
-QT_AUTOBRIEF           = NO
-MULTILINE_CPP_IS_BRIEF = NO
-PYTHON_DOCSTRING       = YES
-INHERIT_DOCS           = YES
-SEPARATE_MEMBER_PAGES  = YES
-TAB_SIZE               = 4
-ALIASES                = "complexity=@par Complexity^^" \
-                         "liveexample{2}=@par Example^^ \1 ^^ @includelineno \2.cpp \n Output (play with this example @htmlinclude \2.link):^^ @verbinclude \2.output ^^ The <a href= https://github.com/nlohmann/json/blob/develop/doc/examples/\2.cpp>example code</a> above can be translated with @verbatim g++ -std=c++11 -Isingle_include doc/examples/\2.cpp -o \2 @endverbatim" \
-                         "requirement=@par Requirements^^" \
-                         "exceptionsafety=@par Exception safety^^" \
-                         "iterators=@par Iterator validity^^"
-OPTIMIZE_OUTPUT_FOR_C  = NO
-OPTIMIZE_OUTPUT_JAVA   = NO
-OPTIMIZE_FOR_FORTRAN   = NO
-OPTIMIZE_OUTPUT_VHDL   = NO
-OPTIMIZE_OUTPUT_SLICE  = NO
-EXTENSION_MAPPING      =
-MARKDOWN_SUPPORT       = YES
-TOC_INCLUDE_HEADINGS   = 0
-AUTOLINK_SUPPORT       = NO
-BUILTIN_STL_SUPPORT    = YES
-CPP_CLI_SUPPORT        = NO
-SIP_SUPPORT            = NO
-IDL_PROPERTY_SUPPORT   = YES
-DISTRIBUTE_GROUP_DOC   = NO
-GROUP_NESTED_COMPOUNDS = NO
-SUBGROUPING            = YES
-INLINE_GROUPED_CLASSES = NO
-INLINE_SIMPLE_STRUCTS  = NO
-TYPEDEF_HIDES_STRUCT   = NO
-LOOKUP_CACHE_SIZE      = 0
-NUM_PROC_THREADS       = 1
-#---------------------------------------------------------------------------
-# Build related configuration options
-#---------------------------------------------------------------------------
-EXTRACT_ALL            = YES
-EXTRACT_PRIVATE        = NO
-EXTRACT_PRIV_VIRTUAL   = NO
-EXTRACT_PACKAGE        = YES
-EXTRACT_STATIC         = YES
-EXTRACT_LOCAL_CLASSES  = YES
-EXTRACT_LOCAL_METHODS  = YES
-EXTRACT_ANON_NSPACES   = YES
-RESOLVE_UNNAMED_PARAMS = YES
-HIDE_UNDOC_MEMBERS     = NO
-HIDE_UNDOC_CLASSES     = NO
-HIDE_FRIEND_COMPOUNDS  = NO
-HIDE_IN_BODY_DOCS      = NO
-INTERNAL_DOCS          = NO
-CASE_SENSE_NAMES       = NO
-HIDE_SCOPE_NAMES       = NO
-HIDE_COMPOUND_REFERENCE= NO
-SHOW_INCLUDE_FILES     = YES
-SHOW_GROUPED_MEMB_INC  = NO
-FORCE_LOCAL_INCLUDES   = NO
-INLINE_INFO            = YES
-SORT_MEMBER_DOCS       = YES
-SORT_BRIEF_DOCS        = YES
-SORT_MEMBERS_CTORS_1ST = YES
-SORT_GROUP_NAMES       = NO
-SORT_BY_SCOPE_NAME     = NO
-STRICT_PROTO_MATCHING  = NO
-GENERATE_TODOLIST      = YES
-GENERATE_TESTLIST      = YES
-GENERATE_BUGLIST       = YES
-GENERATE_DEPRECATEDLIST= YES
-ENABLED_SECTIONS       =
-MAX_INITIALIZER_LINES  = 30
-SHOW_USED_FILES        = NO
-SHOW_FILES             = NO
-SHOW_NAMESPACES        = NO
-FILE_VERSION_FILTER    =
-LAYOUT_FILE            =
-CITE_BIB_FILES         =
-#---------------------------------------------------------------------------
-# Configuration options related to warning and progress messages
-#---------------------------------------------------------------------------
-QUIET                  = YES
-WARNINGS               = YES
-WARN_IF_UNDOCUMENTED   = YES
-WARN_IF_DOC_ERROR      = YES
-WARN_NO_PARAMDOC       = YES
-WARN_AS_ERROR          = NO
-WARN_FORMAT            = "$file:$line: $text"
-WARN_LOGFILE           =
-#---------------------------------------------------------------------------
-# Configuration options related to the input files
-#---------------------------------------------------------------------------
-INPUT                  = ../single_include/nlohmann/json.hpp \
-                         index.md
-INPUT_ENCODING         = UTF-8
-FILE_PATTERNS          =
-RECURSIVE              = NO
-EXCLUDE                =
-EXCLUDE_SYMLINKS       = NO
-EXCLUDE_PATTERNS       =
-EXCLUDE_SYMBOLS        = nlohmann::detail
-EXAMPLE_PATH           = examples
-EXAMPLE_PATTERNS       =
-EXAMPLE_RECURSIVE      = NO
-IMAGE_PATH             = images
-INPUT_FILTER           =
-FILTER_PATTERNS        =
-FILTER_SOURCE_FILES    = NO
-FILTER_SOURCE_PATTERNS =
-USE_MDFILE_AS_MAINPAGE = index.md
-#---------------------------------------------------------------------------
-# Configuration options related to source browsing
-#---------------------------------------------------------------------------
-SOURCE_BROWSER         = YES
-INLINE_SOURCES         = NO
-STRIP_CODE_COMMENTS    = YES
-REFERENCED_BY_RELATION = NO
-REFERENCES_RELATION    = NO
-REFERENCES_LINK_SOURCE = NO
-SOURCE_TOOLTIPS        = YES
-USE_HTAGS              = NO
-VERBATIM_HEADERS       = NO
-#---------------------------------------------------------------------------
-# Configuration options related to the alphabetical class index
-#---------------------------------------------------------------------------
-ALPHABETICAL_INDEX     = YES
-IGNORE_PREFIX          =
-#---------------------------------------------------------------------------
-# Configuration options related to the HTML output
-#---------------------------------------------------------------------------
-GENERATE_HTML          = YES
-HTML_OUTPUT            = html
-HTML_FILE_EXTENSION    = .html
-HTML_HEADER            =
-HTML_FOOTER            =
-HTML_STYLESHEET        =
-HTML_EXTRA_STYLESHEET  = css/mylayout.css
-HTML_EXTRA_FILES       =
-HTML_COLORSTYLE_HUE    = 220
-HTML_COLORSTYLE_SAT    = 100
-HTML_COLORSTYLE_GAMMA  = 80
-HTML_TIMESTAMP         = YES
-HTML_DYNAMIC_MENUS     = YES
-HTML_DYNAMIC_SECTIONS  = YES
-HTML_INDEX_NUM_ENTRIES = 100
-GENERATE_DOCSET        = YES
-DOCSET_FEEDNAME        = "Doxygen generated docs"
-DOCSET_BUNDLE_ID       = me.nlohmann.json
-DOCSET_PUBLISHER_ID    = me.nlohmann
-DOCSET_PUBLISHER_NAME  = NielsLohmann
-GENERATE_HTMLHELP      = NO
-CHM_FILE               =
-HHC_LOCATION           =
-GENERATE_CHI           = NO
-CHM_INDEX_ENCODING     =
-BINARY_TOC             = NO
-TOC_EXPAND             = NO
-GENERATE_QHP           = NO
-QCH_FILE               =
-QHP_NAMESPACE          = org.doxygen.Project
-QHP_VIRTUAL_FOLDER     = doc
-QHP_CUST_FILTER_NAME   =
-QHP_CUST_FILTER_ATTRS  =
-QHP_SECT_FILTER_ATTRS  =
-QHG_LOCATION           =
-GENERATE_ECLIPSEHELP   = NO
-ECLIPSE_DOC_ID         = org.doxygen.Project
-DISABLE_INDEX          = NO
-GENERATE_TREEVIEW      = NO
-ENUM_VALUES_PER_LINE   = 4
-TREEVIEW_WIDTH         = 250
-EXT_LINKS_IN_WINDOW    = NO
-HTML_FORMULA_FORMAT    = png
-FORMULA_FONTSIZE       = 10
-FORMULA_TRANSPARENT    = YES
-FORMULA_MACROFILE      =
-USE_MATHJAX            = NO
-MATHJAX_FORMAT         = HTML-CSS
-MATHJAX_RELPATH        = http://cdn.mathjax.org/mathjax/latest
-MATHJAX_EXTENSIONS     =
-MATHJAX_CODEFILE       =
-SEARCHENGINE           = YES
-SERVER_BASED_SEARCH    = NO
-EXTERNAL_SEARCH        = NO
-SEARCHENGINE_URL       =
-SEARCHDATA_FILE        = searchdata.xml
-EXTERNAL_SEARCH_ID     =
-EXTRA_SEARCH_MAPPINGS  =
-#---------------------------------------------------------------------------
-# Configuration options related to the LaTeX output
-#---------------------------------------------------------------------------
-GENERATE_LATEX         = NO
-LATEX_OUTPUT           = latex
-LATEX_CMD_NAME         = latex
-MAKEINDEX_CMD_NAME     = makeindex
-LATEX_MAKEINDEX_CMD    = \makeindex
-COMPACT_LATEX          = NO
-PAPER_TYPE             = a4
-EXTRA_PACKAGES         =
-LATEX_HEADER           =
-LATEX_FOOTER           =
-LATEX_EXTRA_STYLESHEET =
-LATEX_EXTRA_FILES      =
-PDF_HYPERLINKS         = YES
-USE_PDFLATEX           = YES
-LATEX_BATCHMODE        = NO
-LATEX_HIDE_INDICES     = NO
-LATEX_SOURCE_CODE      = NO
-LATEX_BIB_STYLE        = plain
-LATEX_TIMESTAMP        = NO
-LATEX_EMOJI_DIRECTORY  =
-#---------------------------------------------------------------------------
-# Configuration options related to the RTF output
-#---------------------------------------------------------------------------
-GENERATE_RTF           = NO
-RTF_OUTPUT             = rtf
-COMPACT_RTF            = NO
-RTF_HYPERLINKS         = NO
-RTF_STYLESHEET_FILE    =
-RTF_EXTENSIONS_FILE    =
-RTF_SOURCE_CODE        = NO
-#---------------------------------------------------------------------------
-# Configuration options related to the man page output
-#---------------------------------------------------------------------------
-GENERATE_MAN           = NO
-MAN_OUTPUT             = man
-MAN_EXTENSION          = .3
-MAN_SUBDIR             =
-MAN_LINKS              = NO
-#---------------------------------------------------------------------------
-# Configuration options related to the XML output
-#---------------------------------------------------------------------------
-GENERATE_XML           = NO
-XML_OUTPUT             = xml
-XML_PROGRAMLISTING     = YES
-XML_NS_MEMB_FILE_SCOPE = NO
-#---------------------------------------------------------------------------
-# Configuration options related to the DOCBOOK output
-#---------------------------------------------------------------------------
-GENERATE_DOCBOOK       = NO
-DOCBOOK_OUTPUT         = docbook
-DOCBOOK_PROGRAMLISTING = NO
-#---------------------------------------------------------------------------
-# Configuration options for the AutoGen Definitions output
-#---------------------------------------------------------------------------
-GENERATE_AUTOGEN_DEF   = NO
-#---------------------------------------------------------------------------
-# Configuration options related to the Perl module output
-#---------------------------------------------------------------------------
-GENERATE_PERLMOD       = NO
-PERLMOD_LATEX          = NO
-PERLMOD_PRETTY         = YES
-PERLMOD_MAKEVAR_PREFIX =
-#---------------------------------------------------------------------------
-# Configuration options related to the preprocessor
-#---------------------------------------------------------------------------
-ENABLE_PREPROCESSING   = YES
-MACRO_EXPANSION        = NO
-EXPAND_ONLY_PREDEF     = NO
-SEARCH_INCLUDES        = YES
-INCLUDE_PATH           =
-INCLUDE_FILE_PATTERNS  =
-PREDEFINED             =
-EXPAND_AS_DEFINED      =
-SKIP_FUNCTION_MACROS   = YES
-#---------------------------------------------------------------------------
-# Configuration options related to external references
-#---------------------------------------------------------------------------
-TAGFILES               =
-GENERATE_TAGFILE       = html/nlohmann_json.tag
-ALLEXTERNALS           = NO
-EXTERNAL_GROUPS        = YES
-EXTERNAL_PAGES         = YES
-#---------------------------------------------------------------------------
-# Configuration options related to the dot tool
-#---------------------------------------------------------------------------
-CLASS_DIAGRAMS         = NO
-DIA_PATH               =
-HIDE_UNDOC_RELATIONS   = YES
-HAVE_DOT               = YES
-DOT_NUM_THREADS        = 0
-DOT_FONTNAME           = Helvetica
-DOT_FONTSIZE           = 10
-DOT_FONTPATH           =
-CLASS_GRAPH            = NO
-COLLABORATION_GRAPH    = NO
-GROUP_GRAPHS           = YES
-UML_LOOK               = YES
-UML_LIMIT_NUM_FIELDS   = 10
-DOT_UML_DETAILS        = NO
-DOT_WRAP_THRESHOLD     = 17
-TEMPLATE_RELATIONS     = NO
-INCLUDE_GRAPH          = NO
-INCLUDED_BY_GRAPH      = NO
-CALL_GRAPH             = NO
-CALLER_GRAPH           = NO
-GRAPHICAL_HIERARCHY    = NO
-DIRECTORY_GRAPH        = NO
-DOT_IMAGE_FORMAT       = svg
-INTERACTIVE_SVG        = YES
-DOT_PATH               =
-DOTFILE_DIRS           =
-MSCFILE_DIRS           =
-DIAFILE_DIRS           =
-PLANTUML_JAR_PATH      =
-PLANTUML_CFG_FILE      =
-PLANTUML_INCLUDE_PATH  =
-DOT_GRAPH_MAX_NODES    = 50
-MAX_DOT_GRAPH_DEPTH    = 0
-DOT_TRANSPARENT        = NO
-DOT_MULTI_TARGETS      = NO
-GENERATE_LEGEND        = YES
-DOT_CLEANUP            = YES

doc/Makefile

@@ -1,72 +0,0 @@
-SRCDIR = ../single_include
-SED:=$(shell command -v gsed || which sed)
-
-all: doxygen
-
-
-##########################################################################
-# example files
-##########################################################################
-
-# where are the example cpp files
-EXAMPLES = $(wildcard examples/*.cpp)
-
-# create output from a stand-alone example file
-%.output: %.cpp
-	make $(<:.cpp=) CPPFLAGS="-I $(SRCDIR)" CXXFLAGS="-std=c++11"
-	./$(<:.cpp=) > $@
-	rm $(<:.cpp=)
-
-# compare created output with current output of the example files
-%.test: %.cpp
-	make $(<:.cpp=) CPPFLAGS="-I $(SRCDIR)" CXXFLAGS="-std=c++11"
-	./$(<:.cpp=) > $@
-	diff $@ $(<:.cpp=.output)
-	rm $(<:.cpp=) $@
-
-# create links to try the code online
-%.link: %.cpp
-	rm -fr tmp
-	mkdir tmp
-	cp -r $(SRCDIR)/nlohmann tmp
-	python2 scripts/send_to_wandbox.py tmp $< > $@.tmp
-	/bin/echo -n "<a target=\"_blank\" href=\"`cat $@.tmp`\"><b>online</b></a>" > $@
-	rm -fr tmp $@.tmp
-
-# create output from all stand-alone example files
-create_output: $(EXAMPLES:.cpp=.output)
-
-create_links: $(EXAMPLES:.cpp=.link)
-
-# check output of all stand-alone example files
-check_output: $(EXAMPLES:.cpp=.test)
-
-
-clean:
-	rm -fr me.nlohmann.json.docset html $(EXAMPLES:.cpp=)
-	$(MAKE) clean -C docset
-	$(MAKE) clean -C mkdocs
-
-
-##########################################################################
-# Doxygen HTML documentation
-##########################################################################
-
-# create Doxygen documentation
-doxygen: create_output create_links
-	doxygen
-	$(SED) -i 's@&lt; ObjectType, ArrayType, StringType, BooleanType, NumberIntegerType, NumberFloatType, AllocatorType, JSONSerializer &gt;@@g' html/*.html
-	$(SED) -i 's@&lt;&#160;ObjectType,&#160;ArrayType,&#160;StringType,&#160;BooleanType,&#160;NumberIntegerType,&#160;NumberFloatType,&#160;AllocatorType&#160;JSONSerializer&#160;&gt;@@g' html/*.html
-	$(SED) -i 's@&lt; ObjectType, ArrayType, StringType, BooleanType, NumberIntegerType, NumberUnsignedType, NumberFloatType, AllocatorType, JSONSerializer &gt;@@g' html/*.html
-	$(SED) -i 's@< ObjectType, ArrayType, StringType, BooleanType, NumberIntegerType, NumberUnsignedType, NumberFloatType, AllocatorType, JSONSerializer >@@g' html/*.html
-	$(SED) -i 's@&lt;&#160;ObjectType,&#160;ArrayType,&#160;StringType,&#160;BooleanType,&#160;NumberIntegerType,&#160;NumberUnsignedType,&#160;NumberFloatType,&#160;AllocatorType&#160;JSONSerializer&#160;&gt;@@g' html/*.html
-	$(SED) -i 's@template&lt;template&lt; typename U, typename V, typename... Args &gt; class ObjectType = std::map, template&lt; typename U, typename... Args &gt; class ArrayType = std::vector, class StringType = std::string, class BooleanType = bool, class NumberIntegerType = std::int64_t, class NumberUnsignedType = std::uint64_t, class NumberFloatType = double, template&lt; typename U &gt; class AllocatorType = std::allocator, template&lt; typename T, typename SFINAE=void &gt; class JSONSerializer = adl_serializer&gt;@@g' html/*.html
-	$(SED) -i 's@&lt; ObjectType, ArrayType, StringType, BooleanType, NumberIntegerType, NumberUnsignedType, NumberFloatType, AllocatorType, JSONSerializer &gt;@@g' html/*.html
-	$(SED) -i 's@&lt;&#160;ObjectType,&#160;ArrayType,&#160;StringType,&#160;BooleanType,&#160;NumberIntegerType,&#160;NumberUnsignedType,&#160;NumberFloatType,&#160;AllocatorType,&#160;JSONSerializer&#160;&gt;@@g' html/*.html
-	$(SED) -i 's@JSON_HEDLEY_RETURNS_NON_NULL@@g' html/*.html
-	$(SED) -i 's@JSON_HEDLEY_WARN_UNUSED_RESULT@@g' html/*.html
-
-upload: clean doxygen check_output
-	scripts/git-update-ghpages nlohmann/json html
-	rm -fr html
-	open http://nlohmann.github.io/json/

doc/css/mylayout.css

@@ -1,26 +0,0 @@
-/* hide lengthy template information */
-.memtemplate, .memTemplParams {
-    display: none;
-}
-
-/* allow compiler information to wrap */
-/* https://css-tricks.com/snippets/css/make-pre-text-wrap/ */
-pre.fragment {
-    white-space: pre-wrap;       /* css-3 */
-    white-space: -moz-pre-wrap;  /* Mozilla, since 1999 */
-    white-space: -pre-wrap;      /* Opera 4-6 */
-    white-space: -o-pre-wrap;    /* Opera 7 */
-    word-wrap: break-word;       /* Internet Explorer 5.5+ */
-}
-
-td.paramname {
-    vertical-align: top;
-}
-
-.ok_green {
-    background-color: #89C35C;
-}
-
-.nok_throws {
-    background-color: #ffa500;
-}

doc/css/mylayout_docset.css

@@ -1,27 +0,0 @@
-.memtemplate {
-    display: none;
-}
-
-.memTemplParams {
-    display: none;
-}
-
-.navtab {
-    display: none;
-}
-
-#top, .footer {
-    display: none;
-}
-
-td.paramname {
-    vertical-align: top;
-}
-
-.ok_green {
-    background-color: #89C35C;
-}
-
-.nok_throws {
-    background-color: #ffa500;
-}

doc/docset/Makefile

@@ -1,25 +0,0 @@
-JSON_for_Modern_C++.docset: Info.plist docSet.sql
-	$(MAKE) clean
-	mkdir -p JSON_for_Modern_C++.docset/Contents/Resources/Documents/
-	cp icon*.png JSON_for_Modern_C++.docset
-	cp Info.plist JSON_for_Modern_C++.docset/Contents
-	# build and copy documentation
-	$(MAKE) build -C ../mkdocs
-	cp -r ../mkdocs/site/* JSON_for_Modern_C++.docset/Contents/Resources/Documents
-	# patch CSS to hide navigation items
-	echo "\n\nheader, footer, navi, div.md-sidebar--primary, nav.md-tabs--active, a.md-content__button { display: none; }" >> "$$(ls JSON_for_Modern_C++.docset/Contents/Resources/Documents/assets/stylesheets/main.*.min.css)"
-	# fix spacing
-	echo "\n\ndiv.md-sidebar div.md-sidebar--secondary, div.md-main__inner { top: 0; margin-top: 0 }" >> "$$(ls JSON_for_Modern_C++.docset/Contents/Resources/Documents/assets/stylesheets/main.*.min.css)"
-	# remove "JSON for Modern C++" from page titles
-	find JSON_for_Modern_C++.docset/Contents/Resources/Documents -type f -exec gsed -i 's| - JSON for Modern C++</title>|</title>|' {} +
-	# clean up
-	rm JSON_for_Modern_C++.docset/Contents/Resources/Documents/hooks.py
-	rm JSON_for_Modern_C++.docset/Contents/Resources/Documents/sitemap.*
-	# generate index
-	sqlite3 JSON_for_Modern_C++.docset/Contents/Resources/docSet.dsidx < docSet.sql
-
-JSON_for_Modern_C++.tgz: JSON_for_Modern_C++.docset
-	tar --exclude='.DS_Store' -cvzf JSON_for_Modern_C++.tgz JSON_for_Modern_C++.docset
-
-clean:
-	rm -fr JSON_for_Modern_C++.docset JSON_for_Modern_C++.tgz

doc/docset/docSet.sql

@@ -1,155 +0,0 @@
-DROP TABLE IF EXISTS searchIndex;
-CREATE TABLE searchIndex(id INTEGER PRIMARY KEY, name TEXT, type TEXT, path TEXT);
-CREATE UNIQUE INDEX anchor ON searchIndex (name, type, path);
-
--- API
-INSERT INTO searchIndex(name, type, path) VALUES ('accept', 'Function', 'api/basic_json/accept/index.html');
-INSERT INTO searchIndex(name, type, path) VALUES ('adl_serializer', 'Class', 'api/adl_serializer/index.html');
-INSERT INTO searchIndex(name, type, path) VALUES ('array', 'Function', 'api/basic_json/array/index.html');
-INSERT INTO searchIndex(name, type, path) VALUES ('array_t', 'Type', 'api/basic_json/array_t/index.html');
-INSERT INTO searchIndex(name, type, path) VALUES ('at', 'Method', 'api/basic_json/at/index.html');
-INSERT INTO searchIndex(name, type, path) VALUES ('back', 'Method', 'api/basic_json/back/index.html');
-INSERT INTO searchIndex(name, type, path) VALUES ('basic_json', 'Class', 'api/basic_json/index.html');
-INSERT INTO searchIndex(name, type, path) VALUES ('basic_json', 'Constructor', 'api/basic_json/basic_json/index.html');
-INSERT INTO searchIndex(name, type, path) VALUES ('begin', 'Method', 'api/basic_json/begin/index.html');
-INSERT INTO searchIndex(name, type, path) VALUES ('binary', 'Function', 'api/basic_json/binary/index.html');
-INSERT INTO searchIndex(name, type, path) VALUES ('binary_t', 'Type', 'api/basic_json/binary_t/index.html');
-INSERT INTO searchIndex(name, type, path) VALUES ('boolean_t', 'Type', 'api/basic_json/boolean_t/index.html');
-INSERT INTO searchIndex(name, type, path) VALUES ('cbegin', 'Method', 'api/basic_json/cbegin/index.html');
-INSERT INTO searchIndex(name, type, path) VALUES ('cbor_tag_handler_t', 'Enum', 'api/basic_json/cbor_tag_handler_t/index.html');
-INSERT INTO searchIndex(name, type, path) VALUES ('cend', 'Method', 'api/basic_json/cend/index.html');
-INSERT INTO searchIndex(name, type, path) VALUES ('clear', 'Method', 'api/basic_json/clear/index.html');
-INSERT INTO searchIndex(name, type, path) VALUES ('contains', 'Method', 'api/basic_json/contains/index.html');
-INSERT INTO searchIndex(name, type, path) VALUES ('count', 'Method', 'api/basic_json/count/index.html');
-INSERT INTO searchIndex(name, type, path) VALUES ('crbegin', 'Method', 'api/basic_json/crbegin/index.html');
-INSERT INTO searchIndex(name, type, path) VALUES ('crend', 'Method', 'api/basic_json/crend/index.html');
-INSERT INTO searchIndex(name, type, path) VALUES ('diff', 'Function', 'api/basic_json/diff/index.html');
-INSERT INTO searchIndex(name, type, path) VALUES ('dump', 'Method', 'api/basic_json/dump/index.html');
-INSERT INTO searchIndex(name, type, path) VALUES ('emplace', 'Method', 'api/basic_json/emplace/index.html');
-INSERT INTO searchIndex(name, type, path) VALUES ('emplace_back', 'Method', 'api/basic_json/emplace_back/index.html');
-INSERT INTO searchIndex(name, type, path) VALUES ('empty', 'Method', 'api/basic_json/empty/index.html');
-INSERT INTO searchIndex(name, type, path) VALUES ('end', 'Method', 'api/basic_json/end/index.html');
-INSERT INTO searchIndex(name, type, path) VALUES ('erase', 'Method', 'api/basic_json/erase/index.html');
-INSERT INTO searchIndex(name, type, path) VALUES ('error_handler_t', 'Enum', 'api/basic_json/error_handler_t/index.html');
-INSERT INTO searchIndex(name, type, path) VALUES ('exception', 'Class', 'api/basic_json/exception/index.html');
-INSERT INTO searchIndex(name, type, path) VALUES ('find', 'Method', 'api/basic_json/find/index.html');
-INSERT INTO searchIndex(name, type, path) VALUES ('flatten', 'Method', 'api/basic_json/flatten/index.html');
-INSERT INTO searchIndex(name, type, path) VALUES ('from_bson', 'Function', 'api/basic_json/from_bson/index.html');
-INSERT INTO searchIndex(name, type, path) VALUES ('from_cbor', 'Function', 'api/basic_json/from_cbor/index.html');
-INSERT INTO searchIndex(name, type, path) VALUES ('from_msgpack', 'Function', 'api/basic_json/from_msgpack/index.html');
-INSERT INTO searchIndex(name, type, path) VALUES ('from_ubjson', 'Function', 'api/basic_json/from_ubjson/index.html');
-INSERT INTO searchIndex(name, type, path) VALUES ('front', 'Method', 'api/basic_json/front/index.html');
-INSERT INTO searchIndex(name, type, path) VALUES ('get', 'Method', 'api/basic_json/get/index.html');
-INSERT INTO searchIndex(name, type, path) VALUES ('get_allocator', 'Function', 'api/basic_json/get_allocator/index.html');
-INSERT INTO searchIndex(name, type, path) VALUES ('get_binary', 'Method', 'api/basic_json/get_binary/index.html');
-INSERT INTO searchIndex(name, type, path) VALUES ('get_ptr', 'Method', 'api/basic_json/get_ptr/index.html');
-INSERT INTO searchIndex(name, type, path) VALUES ('get_ref', 'Method', 'api/basic_json/get_ref/index.html');
-INSERT INTO searchIndex(name, type, path) VALUES ('get_to', 'Method', 'api/basic_json/get_to/index.html');
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