cppast | Library to parse and work with the C++ AST | Parser library

The library can be used as CMake subdirectory, download it and call add_subdirectory(path/to/cppast), then link to the cppast target and enable C++11 or higher. The parser needs libclang and the clang++ binary, at least version 4.0.0. The clang++ binary will be found in PATH and in the same directory as the program that is being executed. The CMake code requires llvm-config, you may need to install llvm and not just clang to get it (e.g. on ArchLinux). If llvm-config is in your path and the version is compatible, it should just work out of the box. Else you need to set the CMake variable LLVM_CONFIG_BINARY to the proper path. If you don't have a proper clang version installed, it can also be downloaded. For that you need to set LLVM_DOWNLOAD_OS_NAME. This is the name of the operating system used on the LLVM pre-built binary archive, e.g. x86_64-linux-gnu-ubuntu-16.10 for Ubuntu 16.10. You can also set LLVM_DOWNLOAD_URL to a custom url, to download a specific version or from a mirror. If you don't have llvm-config, you need to pass the locations explictly. For that set the option LLVM_VERSION_EXPLICIT to the version you're using, LIBCLANG_LIBRARY to the location of the libclang library file, LIBCLANG_INCLUDE_DIR to the directory where the header files are located (so they can be included with clang-c/Index.h), and CLANG_BINARY to the full path of the clang++ exectuable. The other dependencies like type_safe are installed automatically with git submodules, if they're not installed already. If you run into any issues with the installation, please report them.
Similar to the above instructions for cppast, there are a couple extra requirements for Windows. The LLVM team does not currently distribute llvm-config.exe as part of the release binaries, so the only way to get it is through manual compilation or from 3rd parties. To prevent version mismatches, it's best to compile LLVM, libclang, and llvm-config.exe from source to ensure proper version matching. However, this is a non-trivial task, requiring a lot of time. The easiest way to work with LLVM and llvm-config.exe is to leverage the Chocolatey llvm package, and then compile the llvm-config.exe tool as a standalone binary. In your cppast based project, if you run into issues with cmake not finding libclang, set LIBCLANG_LIBRARY to be C:/Program Files/LLVM/lib in your CMakeLists.txt file.
Install Visual Studio 2017 with the Desktop C++ development feature enabled.
Install llvm and clang with choco install llvm
Check the version with clang.exe --version
Clone the LLVM project: git clone https://github.com/llvm/llvm-project
Checkout a release version matching the version output, such as 7.0.1, with git checkout llvmorg-7.0.1
cd llvm-project && mkdir build && cd build to prep the build environment.
cmake -DLLVM_ENABLE_PROJECTS="clang" -DLLVM_TARGETS_TO_BUILD="X86" -G "Visual Studio 15 2017" -Thost=x64 ..\llvm This will configure clang and LLVM using a 64-bit toolchain. You'll have all the necessary projects configured for building clang, if you need other LLVM tools. See the LLVM documentation and clang documentation if you only need more assistance.
Open the LLVM.sln solution, and set the build type to be "Release".
Build the Tools/llvm-config target.
Copy the release binary to from build\Release\bin\llvm-config.exe to C:\Program Files\LLVM\bin\llvm-config.exe
Open a new Powershell window and test accessiblity of llvm-config.exe, it should return with it's help message.