JuHwang Kim

Trivial commit. - `%name-prefix` has deprecated in bison 3.0.4. let’s use `%define api.namespace`. - `%define "parser_class_name”` generates warning. it requires `{…}` values.

Hi, Thank you for sharing this project. I'm learning so much from this project! 😄 This PR just adds the `struct FriendDecl` for the `CXCursor_FriendDecl` type cursor.

### Summary This PR adds the `CompilationDatabase` and `CompileCommand` functions of the clang. It is used to load build information from the `compile_commands.json` generated by the cmake project. The `CompilationDatabase`...