OpenGL C++ wrapper

#include <iostream>
#include <type_traits>
#include <GL/glew.h>
#include <GL/gl.h>

void __glPrintError(const char *file, const int line) {
    auto error = glGetError();
    if (error != GL_NO_ERROR) {
        std::cerr << "GL: "
        << gluErrorString(error)
        << std::endl
        << "\tat "
        << file
        << ":"
        << line
        << std::endl;
    }
}

template<typename Function, typename ... Args>
auto __glFunction(const char *file, const int line, Function f, Args ...args) ->
typename std::enable_if<!std::is_void<decltype(f(args...))>::value, decltype(f(args...))>::type {

    auto result = f(args...);
    __glPrintError(file, line);
    return result;
};

template<typename Function, typename ... Args>
auto __glFunction(const char *file, const int line, Function f, Args ...args) ->
typename std::enable_if<std::is_void<decltype(f(args...))>::value, void>::type {

    f(args...);
    __glPrintError(file, line);
};

#define gl(function, ...) __glFunction(__FILE__, __LINE__, function, ##__VA_ARGS__)