shader_program_variadic.hpp

template <typename... Ts>
void attach_shaders(GLuint program, Ts... shaders) {
    (glAttachShader(program, shaders), ...);
}

template <typename... Ts>
void detach_shaders(GLuint program, Ts... shaders) {
    (glDetachShader(program, shaders), ...);
}

template <typename... Ts>
void delete_shaders(Ts... shaders) {
    (glDeleteShader(shaders), ...);
}

void link_program(GLuint program) {
    glLinkProgram(program);
    GLint link_status = 0;
    glGetProgramiv(program, GL_LINK_STATUS, &link_status);
    if (link_status == GL_FALSE) {
        GLint length = 0;
        glGetProgramiv(program, GL_INFO_LOG_LENGTH, &length);
        std::string error_log;
        error_log.resize(static_cast<unsigned long>(length));
        glGetProgramInfoLog(program, length, &length, &error_log[0]);
        glDeleteProgram(program);
        throw std::runtime_error{
            "Error while linking shader program " + std::to_string(program) + "\n"
            + "Error log: \n"
            + error_log
        };
    }
}

template <typename... Args>
GLuint create_program(Args&&... shaders) {
    const GLuint program = glCreateProgram();
    attach_shaders(program, shaders...);
    link_program(program);

    detach_shaders(program, shaders...);
    delete_shaders(shaders...);
    return program;
}