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 // template<> struct char_traits<char16_t>
13 
14 // static size_t length(const char_type* s);
15 
16 #include <string>
17 #include <cassert>
18 
main()19 int main()
20 {
21 #ifndef _LIBCPP_HAS_NO_UNICODE_CHARS
22 #if __cplusplus >= 201103L
23     assert(std::char_traits<char16_t>::length(u"") == 0);
24     assert(std::char_traits<char16_t>::length(u"a") == 1);
25     assert(std::char_traits<char16_t>::length(u"aa") == 2);
26     assert(std::char_traits<char16_t>::length(u"aaa") == 3);
27     assert(std::char_traits<char16_t>::length(u"aaaa") == 4);
28 #endif
29 #endif  // _LIBCPP_HAS_NO_UNICODE_CHARS
30 }
31