1 //===----------------------------------------------------------------------===// 2 // 3 // The LLVM Compiler Infrastructure 4 // 5 // This file is dual licensed under the MIT and the University of Illinois Open 6 // Source Licenses. See LICENSE.TXT for details. 7 // 8 //===----------------------------------------------------------------------===// 9 10 // <string> 11 12 // basic_string& operator=(basic_string&& c) 13 // noexcept( 14 // allocator_type::propagate_on_container_move_assignment::value && 15 // is_nothrow_move_assignable<allocator_type>::value); 16 17 // This tests a conforming extension 18 19 #include <string> 20 #include <cassert> 21 22 #include "test_allocator.h" 23 24 template <class T> 25 struct some_alloc 26 { 27 typedef T value_type; 28 some_alloc(const some_alloc&); 29 }; 30 31 int main() 32 { 33 #if __has_feature(cxx_noexcept) 34 { 35 typedef std::string C; 36 static_assert(std::is_nothrow_move_assignable<C>::value, ""); 37 } 38 { 39 typedef std::basic_string<char, std::char_traits<char>, test_allocator<char>> C; 40 static_assert(!std::is_nothrow_move_assignable<C>::value, ""); 41 } 42 { 43 typedef std::basic_string<char, std::char_traits<char>, some_alloc<char>> C; 44 static_assert(!std::is_nothrow_move_assignable<C>::value, ""); 45 } 46 #endif 47 } 48
