Example of glGetError usage

glerrror.c

    GLenum err(glGetError());

    while (err != GL_NO_ERROR) {
        string error;
        switch (err) {
            case GL_INVALID_OPERATION:
                error = "INVALID_OPERATION";
                break;
            case GL_INVALID_ENUM:
                error = "INVALID_ENUM";
                break;
            case GL_INVALID_VALUE:
                error = "INVALID_VALUE";
                break;
            case GL_OUT_OF_MEMORY:
                error = "OUT_OF_MEMORY";
                break;
            case GL_INVALID_FRAMEBUFFER_OPERATION:
                error = "INVALID_FRAMEBUFFER_OPERATION";
                break;
            default:
                error = "Unknown error";
                break;
        }
        std::cout << "GL_" << error;
        err = glGetError();
    }