gistfile1.d

ReturnType!func checkGl(alias func, Args...)(Args args) {
    debug scope(success) {
        GLenum error_code = glGetError();

        if(error_code != GL_NO_ERROR) {
            stderr.writefln(`OpenGL function "%s" failed: "%s."`, func.stringof, gl_error_string(error_code));
        }
    }

    return func(args);
}