GLSL to SPIR-Vのランタイムコンパイルにおけるinclude directiveがよく分からなかったので自前で置換してしまった

std::string include(const std::string& filepath, const std::string& sourceText)
{
    using std::filesystem::path;
    path dir = path{ filepath }.parent_path();

    std::string included = sourceText;
    std::regex regex{ "#include \"(.*)\"" };
    std::smatch results;
    while (std::regex_search(included, results, regex)) {
        path includePath = dir / results[1].str();
        std::string includeText = ReadFile(includePath.string());
        included.replace(results.position(), results.length(), includeText);
    }
    return included;
}