[ceph.git] / ceph / src / boost / libs / atomic / test / c_implicit_ctor.cpp

//  Copyright (c) 2018 Andrey Semashev
//
//  Distributed under the Boost Software License, Version 1.0.
//  See accompanying file LICENSE_1_0.txt or copy at
//  http://www.boost.org/LICENSE_1_0.txt)

// The test verifies that atomic<T> has an implicit conversion constructor from T.
// This can only be tested in C++17 because it has mandated copy elision. Previous C++ versions
// also require atomic<> to have a copy or move constructor, which it does not.
#if __cplusplus >= 201703L

#include <boost/atomic.hpp>
#include <boost/static_assert.hpp>
#include <boost/config.hpp>
#include <type_traits>

int main(int, char *[])
{
    static_assert(std::is_convertible< int, boost::atomic< int > >::value, "boost::atomic<T> does not have an implicit constructor from T");

    boost::atomic< short > a = 10;
    (void)a;

    return 0;
}

#else // __cplusplus >= 201703L

int main(int, char *[])
{
    return 0;
}

#endif // __cplusplus >= 201703L
Commit	Line	Data
11fdf7f2 TL	1	// Copyright (c) 2018 Andrey Semashev
	2	//
	3	// Distributed under the Boost Software License, Version 1.0.
	4	// See accompanying file LICENSE_1_0.txt or copy at
	5	// http://www.boost.org/LICENSE_1_0.txt)
	6
	7	// The test verifies that atomic<T> has an implicit conversion constructor from T.
	8	// This can only be tested in C++17 because it has mandated copy elision. Previous C++ versions
	9	// also require atomic<> to have a copy or move constructor, which it does not.
	10	#if __cplusplus >= 201703L
	11
	12	#include <boost/atomic.hpp>
	13	#include <boost/static_assert.hpp>
	14	#include <boost/config.hpp>
	15	#include <type_traits>
	16
	17	int main(int, char *[])
	18	{
	19	static_assert(std::is_convertible< int, boost::atomic< int > >::value, "boost::atomic<T> does not have an implicit constructor from T");
	20
	21	boost::atomic< short > a = 10;
	22	(void)a;
	23
	24	return 0;
	25	}
	26
	27	#else // __cplusplus >= 201703L
	28
	29	int main(int, char *[])
	30	{
	31	return 0;
	32	}
	33
	34	#endif // __cplusplus >= 201703L