check_cxx11.cpp

/*  Copyright 2020-2023 Rene Rivera
 *  Distributed under the Boost Software License, Version 1.0.
 *  (See accompanying file LICENSE.txt or
 * https://www.bfgroup.xyz/b2/LICENSE.txt)
 */

/*
This program is a compile test for support of C++11. If it compiles
successfully some key parts of C++11 the B2 engine requires are
available. This is used by the build script to guess and check the
compiler to build the engine with.
*/

// Some headers we test...
#include <memory>
#include <mutex>
#include <thread>

// Some basic constexpr support?
template <int C>
struct X
{
	static constexpr int c = C;
};

int main()
{
#ifndef _WIN32
	// Check for basic thread calls.
	// [2020-08-19] Mingw-w64 with win32 threading model (as opposed to posix
	// threading model) does not really have std::thread etc. Please see
	// comments in sysinfo.cpp.
	{
		auto _ = std::thread::hardware_concurrency();
	}
	{
		std::mutex m;
		std::lock_guard<std::mutex> l(m);
		std::thread t([]() {});
		t.join();
	}
#endif

	// [2021-08-07] We check the following C++11 features: brace initialization,
	// unique_ptr. Plus the author's ability to memorize some digits.
	{
		const std::unique_ptr<float> pf { new float { 3.14159f } };
	}
}