diff --git a/CMakeLists.txt b/CMakeLists.txt
index 6ef6e8a..d4e03a9 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -3,16 +3,16 @@ cmake_minimum_required(VERSION 3.4)
 
 # enable MSVC_RUNTIME_LIBRARY target property
 # see https://cmake.org/cmake/help/latest/policy/CMP0091.html
-if(POLICY CMP0091)
-  cmake_policy(SET CMP0091 NEW)
-endif()
+if (POLICY CMP0091)
+    cmake_policy(SET CMP0091 NEW)
+endif ()
 
 project(YAML_CPP VERSION 0.7.0 LANGUAGES CXX)
 
 set(YAML_CPP_MAIN_PROJECT OFF)
-if(CMAKE_SOURCE_DIR STREQUAL PROJECT_SOURCE_DIR)
-  set(YAML_CPP_MAIN_PROJECT ON)
-endif()
+if (CMAKE_SOURCE_DIR STREQUAL PROJECT_SOURCE_DIR)
+    set(YAML_CPP_MAIN_PROJECT ON)
+endif ()
 
 include(CMakePackageConfigHelpers)
 include(CMakeDependentOption)
@@ -26,23 +26,23 @@ option(YAML_BUILD_SHARED_LIBS "Build yaml-cpp shared library" ${BUILD_SHARED_LIB
 option(YAML_CPP_INSTALL "Enable generation of yaml-cpp install targets" ${YAML_CPP_MAIN_PROJECT})
 option(YAML_CPP_FORMAT_SOURCE "Format source" ON)
 cmake_dependent_option(YAML_CPP_BUILD_TESTS
-  "Enable yaml-cpp tests" OFF
-  "BUILD_TESTING;YAML_CPP_MAIN_PROJECT" OFF)
+        "Enable yaml-cpp tests" OFF
+        "BUILD_TESTING;YAML_CPP_MAIN_PROJECT" OFF)
 cmake_dependent_option(YAML_MSVC_SHARED_RT
-  "MSVC: Build yaml-cpp with shared runtime libs (/MD)" ON
-  "CMAKE_SYSTEM_NAME MATCHES Windows" OFF)
- 
+        "MSVC: Build yaml-cpp with shared runtime libs (/MD)" ON
+        "CMAKE_SYSTEM_NAME MATCHES Windows" OFF)
+
 if (YAML_CPP_FORMAT_SOURCE)
     find_program(YAML_CPP_CLANG_FORMAT_EXE NAMES clang-format)
-endif()
+endif ()
 
 if (YAML_BUILD_SHARED_LIBS)
-  set(yaml-cpp-type SHARED)
-  set(yaml-cpp-label-postfix "shared")
-else()
-  set(yaml-cpp-type STATIC)
-  set(yaml-cpp-label-postfix "static")
-endif()
+    set(yaml-cpp-type SHARED)
+    set(yaml-cpp-label-postfix "shared")
+else ()
+    set(yaml-cpp-type STATIC)
+    set(yaml-cpp-label-postfix "static")
+endif ()
 
 set(build-shared $<BOOL:${YAML_BUILD_SHARED_LIBS}>)
 set(build-windows-dll $<AND:$<BOOL:${CMAKE_HOST_WIN32}>,${build-shared}>)
@@ -50,16 +50,16 @@ set(not-msvc $<NOT:$<CXX_COMPILER_ID:MSVC>>)
 set(msvc-shared_rt $<BOOL:${YAML_MSVC_SHARED_RT}>)
 
 if (NOT DEFINED CMAKE_MSVC_RUNTIME_LIBRARY)
-  set(CMAKE_MSVC_RUNTIME_LIBRARY
-    MultiThreaded$<$<CONFIG:Debug>:Debug>$<${msvc-shared_rt}:DLL>)
-endif()
+    set(CMAKE_MSVC_RUNTIME_LIBRARY
+            MultiThreaded$<$<CONFIG:Debug>:Debug>$<${msvc-shared_rt}:DLL>)
+endif ()
 
 set(contrib-pattern "src/contrib/*.cpp")
 set(src-pattern "src/*.cpp")
 if (CMAKE_VERSION VERSION_GREATER 3.12)
-  list(INSERT contrib-pattern 0 CONFIGURE_DEPENDS)
-  list(INSERT src-pattern 0 CONFIGURE_DEPENDS)
-endif()
+    list(INSERT contrib-pattern 0 CONFIGURE_DEPENDS)
+    list(INSERT src-pattern 0 CONFIGURE_DEPENDS)
+endif ()
 
 file(GLOB yaml-cpp-contrib-sources ${contrib-pattern})
 file(GLOB yaml-cpp-sources ${src-pattern})
@@ -78,129 +78,124 @@ add_library(yaml-cpp ${yaml-cpp-type} "")
 add_library(yaml-cpp::yaml-cpp ALIAS yaml-cpp)
 
 set_property(TARGET yaml-cpp
-  PROPERTY
-    MSVC_RUNTIME_LIBRARY ${CMAKE_MSVC_RUNTIME_LIBRARY})
+        PROPERTY
+        MSVC_RUNTIME_LIBRARY ${CMAKE_MSVC_RUNTIME_LIBRARY})
 set_property(TARGET yaml-cpp
-  PROPERTY
-    CXX_STANDARD_REQUIRED ON)
+        PROPERTY
+        CXX_STANDARD_REQUIRED ON)
 
 if (NOT YAML_BUILD_SHARED_LIBS)
-  set_property(TARGET yaml-cpp PROPERTY POSITION_INDEPENDENT_CODE ON)
-endif()
+    set_property(TARGET yaml-cpp PROPERTY POSITION_INDEPENDENT_CODE ON)
+endif ()
 
 target_include_directories(yaml-cpp
-  PUBLIC
-    $<BUILD_INTERFACE:${PROJECT_SOURCE_DIR}/include>
-    $<INSTALL_INTERFACE:${CMAKE_INSTALL_INCLUDEDIR}>
-  PRIVATE
-    $<BUILD_INTERFACE:${PROJECT_SOURCE_DIR}/src>)
+        PUBLIC
+        $<BUILD_INTERFACE:${PROJECT_SOURCE_DIR}/include>
+        $<INSTALL_INTERFACE:${CMAKE_INSTALL_INCLUDEDIR}>
+        PRIVATE
+        $<BUILD_INTERFACE:${PROJECT_SOURCE_DIR}/src>)
 
 if (NOT DEFINED CMAKE_CXX_STANDARD)
-  set_target_properties(yaml-cpp
-    PROPERTIES
-      CXX_STANDARD 11)
-endif()
+    set_target_properties(yaml-cpp
+            PROPERTIES
+            CXX_STANDARD 11)
+endif ()
 
-if(YAML_CPP_MAIN_PROJECT)
-  target_compile_options(yaml-cpp
-    PRIVATE
-      $<${not-msvc}:-Wall -Wextra -Wshadow -Weffc++ -Wno-long-long>
-      $<${not-msvc}:-pedantic -pedantic-errors>)
-endif()
+if (YAML_CPP_MAIN_PROJECT)
+    target_compile_options(yaml-cpp
+            PRIVATE
+            $<${not-msvc}:-Wall -Wextra -Wshadow -Weffc++ -Wno-long-long>
+            $<${not-msvc}:-pedantic -pedantic-errors>)
+endif ()
 
 target_compile_options(yaml-cpp
-  PRIVATE
-    $<$<AND:${backport-msvc-runtime},${msvc-rt-mtd-static}>:-MTd>
-    $<$<AND:${backport-msvc-runtime},${msvc-rt-mt-static}>:-MT>
-    $<$<AND:${backport-msvc-runtime},${msvc-rt-mtd-dll}>:-MDd>
-    $<$<AND:${backport-msvc-runtime},${msvc-rt-mt-dll}>:-MD>
+        PRIVATE
+        $<$<AND:${backport-msvc-runtime},${msvc-rt-mtd-static}>:-MTd>
+        $<$<AND:${backport-msvc-runtime},${msvc-rt-mt-static}>:-MT>
+        $<$<AND:${backport-msvc-runtime},${msvc-rt-mtd-dll}>:-MDd>
+        $<$<AND:${backport-msvc-runtime},${msvc-rt-mt-dll}>:-MD>
 
-    # /wd4127 = disable warning C4127 "conditional expression is constant"
-    # http://msdn.microsoft.com/en-us/library/6t66728h.aspx
-    # /wd4355 = disable warning C4355 "'this' : used in base member initializer list
-    # http://msdn.microsoft.com/en-us/library/3c594ae3.aspx
-    $<$<CXX_COMPILER_ID:MSVC>:/W3 /wd4127 /wd4355>)
+        # /wd4127 = disable warning C4127 "conditional expression is constant"
+        # http://msdn.microsoft.com/en-us/library/6t66728h.aspx
+        # /wd4355 = disable warning C4355 "'this' : used in base member initializer list
+        # http://msdn.microsoft.com/en-us/library/3c594ae3.aspx
+        $<$<CXX_COMPILER_ID:MSVC>:/W3 /wd4127 /wd4355>)
 
 target_compile_definitions(yaml-cpp
-  PUBLIC
-    $<$<NOT:$<BOOL:${YAML_BUILD_SHARED_LIBS}>>:YAML_CPP_STATIC_DEFINE>
-  PRIVATE
-    $<${build-windows-dll}:${PROJECT_NAME}_DLL>
-    $<$<NOT:$<BOOL:${YAML_CPP_BUILD_CONTRIB}>>:YAML_CPP_NO_CONTRIB>)
+        PUBLIC
+        $<$<NOT:$<BOOL:${YAML_BUILD_SHARED_LIBS}>>:YAML_CPP_STATIC_DEFINE>
+        PRIVATE
+        $<${build-windows-dll}:${PROJECT_NAME}_DLL>
+        $<$<NOT:$<BOOL:${YAML_CPP_BUILD_CONTRIB}>>:YAML_CPP_NO_CONTRIB>)
 
 target_sources(yaml-cpp
-  PRIVATE
-    $<$<BOOL:${YAML_CPP_BUILD_CONTRIB}>:${yaml-cpp-contrib-sources}>
-    ${yaml-cpp-sources})
-
-if (NOT DEFINED CMAKE_DEBUG_POSTFIX)
-  set(CMAKE_DEBUG_POSTFIX "d")
-endif()
+        PRIVATE
+        $<$<BOOL:${YAML_CPP_BUILD_CONTRIB}>:${yaml-cpp-contrib-sources}>
+        ${yaml-cpp-sources})
 
 set_target_properties(yaml-cpp PROPERTIES
-  VERSION "${PROJECT_VERSION}"
-  SOVERSION "${PROJECT_VERSION_MAJOR}.${PROJECT_VERSION_MINOR}"
-  PROJECT_LABEL "yaml-cpp ${yaml-cpp-label-postfix}"
-  DEBUG_POSTFIX "${CMAKE_DEBUG_POSTFIX}")
+        VERSION "${PROJECT_VERSION}"
+        SOVERSION "${PROJECT_VERSION_MAJOR}.${PROJECT_VERSION_MINOR}"
+        PROJECT_LABEL "yaml-cpp ${yaml-cpp-label-postfix}")
 
 set(CONFIG_EXPORT_DIR "${CMAKE_INSTALL_LIBDIR}/cmake/yaml-cpp")
 set(EXPORT_TARGETS yaml-cpp)
 configure_package_config_file(
-  "${PROJECT_SOURCE_DIR}/yaml-cpp-config.cmake.in"
-  "${PROJECT_BINARY_DIR}/yaml-cpp-config.cmake"
-  INSTALL_DESTINATION "${CONFIG_EXPORT_DIR}"
-  PATH_VARS CMAKE_INSTALL_INCLUDEDIR CMAKE_INSTALL_LIBDIR CONFIG_EXPORT_DIR YAML_BUILD_SHARED_LIBS)
+        "${PROJECT_SOURCE_DIR}/yaml-cpp-config.cmake.in"
+        "${PROJECT_BINARY_DIR}/yaml-cpp-config.cmake"
+        INSTALL_DESTINATION "${CONFIG_EXPORT_DIR}"
+        PATH_VARS CMAKE_INSTALL_INCLUDEDIR CMAKE_INSTALL_LIBDIR CONFIG_EXPORT_DIR YAML_BUILD_SHARED_LIBS)
 unset(EXPORT_TARGETS)
 
 write_basic_package_version_file(
-  "${PROJECT_BINARY_DIR}/yaml-cpp-config-version.cmake"
-  COMPATIBILITY AnyNewerVersion)
+        "${PROJECT_BINARY_DIR}/yaml-cpp-config-version.cmake"
+        COMPATIBILITY AnyNewerVersion)
 
 configure_file(yaml-cpp.pc.in yaml-cpp.pc @ONLY)
 
 if (YAML_CPP_INSTALL)
-  install(TARGETS yaml-cpp
-    EXPORT yaml-cpp-targets
-    RUNTIME DESTINATION ${CMAKE_INSTALL_BINDIR}
-    LIBRARY DESTINATION ${CMAKE_INSTALL_LIBDIR}
-    ARCHIVE DESTINATION ${CMAKE_INSTALL_LIBDIR})
-  install(DIRECTORY ${PROJECT_SOURCE_DIR}/include/
-    DESTINATION ${CMAKE_INSTALL_INCLUDEDIR}
-                FILES_MATCHING PATTERN "*.h")
-  install(EXPORT yaml-cpp-targets
-    DESTINATION "${CONFIG_EXPORT_DIR}")
-  install(FILES
-      "${PROJECT_BINARY_DIR}/yaml-cpp-config.cmake"
-      "${PROJECT_BINARY_DIR}/yaml-cpp-config-version.cmake"
-    DESTINATION "${CONFIG_EXPORT_DIR}")
-  install(FILES "${PROJECT_BINARY_DIR}/yaml-cpp.pc"
-    DESTINATION ${CMAKE_INSTALL_LIBDIR}/pkgconfig)
-endif()
+    install(TARGETS yaml-cpp
+            EXPORT yaml-cpp-targets
+            RUNTIME DESTINATION ${CMAKE_INSTALL_BINDIR}
+            LIBRARY DESTINATION ${CMAKE_INSTALL_LIBDIR}
+            ARCHIVE DESTINATION ${CMAKE_INSTALL_LIBDIR})
+    install(DIRECTORY ${PROJECT_SOURCE_DIR}/include/
+            DESTINATION ${CMAKE_INSTALL_INCLUDEDIR}
+            FILES_MATCHING PATTERN "*.h")
+    install(EXPORT yaml-cpp-targets
+            DESTINATION "${CONFIG_EXPORT_DIR}")
+    install(FILES
+            "${PROJECT_BINARY_DIR}/yaml-cpp-config.cmake"
+            "${PROJECT_BINARY_DIR}/yaml-cpp-config-version.cmake"
+            DESTINATION "${CONFIG_EXPORT_DIR}")
+    install(FILES "${PROJECT_BINARY_DIR}/yaml-cpp.pc"
+            DESTINATION ${CMAKE_INSTALL_LIBDIR}/pkgconfig)
+endif ()
 unset(CONFIG_EXPORT_DIR)
 
-if(YAML_CPP_BUILD_TESTS)
-  add_subdirectory(test)
-endif()
+if (YAML_CPP_BUILD_TESTS)
+    add_subdirectory(test)
+endif ()
 
-if(YAML_CPP_BUILD_TOOLS)
-  add_subdirectory(util)
-endif()
+if (YAML_CPP_BUILD_TOOLS)
+    add_subdirectory(util)
+endif ()
 
 if (YAML_CPP_FORMAT_SOURCE AND YAML_CPP_CLANG_FORMAT_EXE)
-  add_custom_target(format
-    COMMAND clang-format --style=file -i $<TARGET_PROPERTY:yaml-cpp,SOURCES>
-    COMMAND_EXPAND_LISTS
-    COMMENT "Running clang-format"
-    VERBATIM)
-endif()
+    add_custom_target(format
+            COMMAND clang-format --style=file -i $<TARGET_PROPERTY:yaml-cpp,SOURCES>
+            COMMAND_EXPAND_LISTS
+            COMMENT "Running clang-format"
+            VERBATIM)
+endif ()
 
 # uninstall target
-if(NOT TARGET uninstall)
-  configure_file(
-    "${CMAKE_CURRENT_SOURCE_DIR}/cmake_uninstall.cmake.in"
-    "${CMAKE_CURRENT_BINARY_DIR}/cmake_uninstall.cmake"
-    IMMEDIATE @ONLY)
+if (NOT TARGET uninstall)
+    configure_file(
+            "${CMAKE_CURRENT_SOURCE_DIR}/cmake_uninstall.cmake.in"
+            "${CMAKE_CURRENT_BINARY_DIR}/cmake_uninstall.cmake"
+            IMMEDIATE @ONLY)
 
-  add_custom_target(uninstall
-    COMMAND ${CMAKE_COMMAND} -P ${CMAKE_CURRENT_BINARY_DIR}/cmake_uninstall.cmake)
-endif()
+    add_custom_target(uninstall
+            COMMAND ${CMAKE_COMMAND} -P ${CMAKE_CURRENT_BINARY_DIR}/cmake_uninstall.cmake)
+endif ()