README.md · mirrors/yaml-cpp

# yaml-cpp ![Build Status](https://github.com/jbeder/yaml-cpp/actions/workflows/build.yml/badge.svg) [![Documentation](https://codedocs.xyz/jbeder/yaml-cpp.svg)](https://codedocs.xyz/jbeder/yaml-cpp/)

`yaml-cpp` is a [YAML](http://www.yaml.org/) parser and emitter in C++ matching the [YAML 1.2 spec](http://www.yaml.org/spec/1.2/spec.html).

## Usage

See [Tutorial](https://github.com/jbeder/yaml-cpp/wiki/Tutorial) and [How to Emit YAML](https://github.com/jbeder/yaml-cpp/wiki/How-To-Emit-YAML) for reference. For the old API (until 0.5.0), see [How To Parse A Document](https://github.com/jbeder/yaml-cpp/wiki/How-To-Parse-A-Document-(Old-API)).

## Any Problems?

If you find a bug, post an [issue](https://github.com/jbeder/yaml-cpp/issues)! If you have questions about how to use yaml-cpp, please post it on http://stackoverflow.com and tag it [`yaml-cpp`](http://stackoverflow.com/questions/tagged/yaml-cpp).

## How to Build

`yaml-cpp` uses [CMake](http://www.cmake.org) to support cross-platform building. Install [CMake](http://www.cmake.org) _(Resources -> Download)_ before proceeding. The basic steps to build are:

**Note:** If you don't use the provided installer for your platform, make sure that you add `CMake`'s bin folder to your path.

#### 1. Navigate into the source directory, create build folder and run `CMake`:

```sh
mkdir build
cd build
cmake [-G generator] [-DYAML_BUILD_SHARED_LIBS=on|OFF] ..
```

* The `generator` option is the build system you'd like to use. Run `cmake` without arguments to see a full list of available generators.
    * On Windows, you might use "Visual Studio 12 2013" (VS 2013 32-bits), or "Visual Studio 14 2015 Win64" (VS 2015 64-bits).
    * On OS X, you might use "Xcode".
    * On a UNIX-like system, omit the option (for a Makefile).

* `yaml-cpp` builds a static library by default, you may want to build a shared library by specifying `-DYAML_BUILD_SHARED_LIBS=ON`.

* [Debug mode of the GNU standard C++
    library](https://gcc.gnu.org/onlinedocs/libstdc++/manual/debug_mode.html)
    can be used when both `yaml-cpp` and client code is compiled with the
    `_GLIBCXX_DEBUG` flag (e.g. by calling CMake with `-D
    CMAKE_CXX_FLAGS_DEBUG='-g -D_GLIBCXX_DEBUG'` option).

Note that for `yaml-cpp` unit tests to run successfully, the _GoogleTest_
    library also must be built with this flag, i.e. the system one cannot be
    used (the _YAML_USE_SYSTEM_GTEST_ CMake option must be _OFF_, which is the
    default).

* For more options on customizing the build, see the [CMakeLists.txt](https://github.com/jbeder/yaml-cpp/blob/master/CMakeLists.txt) file.

#### 2. Build it!
  * The command you'll need to run depends on the generator you chose earlier.

**Note:** To clean up, just remove the `build` directory.

## How to Integrate it within your project using CMake

You can use for example FetchContent :

```cmake
include(FetchContent)

FetchContent_Declare(
  yaml-cpp
  GIT_REPOSITORY https://github.com/jbeder/yaml-cpp.git
  GIT_TAG <tag_name> # Can be a tag (yaml-cpp-x.x.x), a commit hash, or a branch name (master)
)
FetchContent_GetProperties(yaml-cpp)

if(NOT yaml-cpp_POPULATED)
  message(STATUS "Fetching yaml-cpp...")
  FetchContent_Populate(yaml-cpp)
  add_subdirectory(${yaml-cpp_SOURCE_DIR} ${yaml-cpp_BINARY_DIR})
endif()

target_link_libraries(YOUR_LIBRARY PUBLIC yaml-cpp::yaml-cpp) # The library or executable that require yaml-cpp library
```

## Recent Releases

[yaml-cpp 0.6.0](https://github.com/jbeder/yaml-cpp/releases/tag/yaml-cpp-0.6.0) released! This release requires C++11, and no longer depends on Boost.

[yaml-cpp 0.3.0](https://github.com/jbeder/yaml-cpp/releases/tag/release-0.3.0) is still available if you want the old API.

**The old API will continue to be supported, and will still receive bugfixes!** The 0.3.x and 0.4.x versions will be old API releases, and 0.5.x and above will all be new API releases.

# API Documentation

The autogenerated API reference is hosted on [CodeDocs](https://codedocs.xyz/jbeder/yaml-cpp/index.html)

# Third Party Integrations

The following projects are not officially supported:

- [Qt wrapper](https://gist.github.com/brcha/d392b2fe5f1e427cc8a6)
- [UnrealEngine Wrapper](https://github.com/jwindgassen/UnrealYAML)

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