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()
15 //        noexcept(is_nothrow_default_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 
main()25 int main()
26 {
27     {
28         typedef std::string C;
29         static_assert(std::is_nothrow_default_constructible<C>::value, "");
30     }
31     {
32         typedef std::basic_string<char, std::char_traits<char>, test_allocator<char>> C;
33         static_assert(std::is_nothrow_default_constructible<C>::value, "");
34     }
35     {
36         typedef std::basic_string<char, std::char_traits<char>, limited_allocator<char, 10>> C;
37         static_assert(!std::is_nothrow_default_constructible<C>::value, "");
38     }
39 }
40