616caea27a
* Make exception context optional Change exception context parameter to pointer and replace context with nullptr where appropriate. * Support escaping other string types * Add string concatenation function Add variadic concat() function for concatenating char *, char, and string types. * Replace string concatenations using + with concat() * Template json_pointer on string type Change json_pointer from being templated on basic_json to being templated on string type. * Add unit test for #3388 Closes #3388. * Fix regression test for #2958 * Add backwards compatibility with json_pointer<basic_json> * Update json_pointer docs * Allow comparing different json_pointers * Update version numbers
41 lines
644 B
Markdown
41 lines
644 B
Markdown
# <small>nlohmann::json_pointer::</small>back
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```cpp
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const string_t& back() const;
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```
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Return last reference token.
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## Return value
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Last reference token.
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## Exceptions
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Throws [out_of_range.405](../../home/exceptions.md#jsonexceptionout_of_range405) if JSON pointer has no parent.
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## Complexity
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Constant.
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## Examples
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??? example
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The example shows the usage of `back`.
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```cpp
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--8<-- "examples/json_pointer__back.cpp"
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```
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Output:
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```json
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--8<-- "examples/json_pointer__back.output"
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```
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## Version history
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- Added in version 3.6.0.
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- Changed return type to `string_t` in version 3.11.0.
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