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 // UNSUPPORTED: c++98, c++03
11 
12 // <string>
13 
14 // basic_string(basic_string&&)
15 //        noexcept(is_nothrow_move_constructible<allocator_type>::value);
16 
17 // This tests a conforming extension
18 
19 #include <string>
20 #include <cassert>
21 
22 #include "test_macros.h"
23 #include "test_allocator.h"
24 
25 template <class T>
26 struct some_alloc
27 {
28     typedef T value_type;
29     some_alloc(const some_alloc&);
30 };
31 
main()32 int main()
33 {
34     {
35         typedef std::string C;
36         static_assert(std::is_nothrow_move_constructible<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_constructible<C>::value, "");
41     }
42     {
43         typedef std::basic_string<char, std::char_traits<char>, some_alloc<char>> C;
44 #if TEST_STD_VER <= 14
45         static_assert(!std::is_nothrow_move_constructible<C>::value, "");
46 #else
47         static_assert( std::is_nothrow_move_constructible<C>::value, "");
48 #endif
49     }
50 }
51