pub fn do_cxx_cpp_generation(
rs: TokenStream,
cpp_codegen_options: &CppCodegenOptions<'_>,
cxxgen_header_name: String,
) -> Result<CppFilePair, Error>
pub fn do_cxx_cpp_generation(
rs: TokenStream,
cpp_codegen_options: &CppCodegenOptions<'_>,
cxxgen_header_name: String,
) -> Result<CppFilePair, Error>