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 main(int,char * [])17int 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 main(int,char * [])29int main(int, char *[]) 30 { 31 return 0; 32 } 33 34 #endif // __cplusplus >= 201703L 35