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<char>
13 
14 // static constexpr bool lt(char_type c1, char_type c2);
15 
16 #include <string>
17 #include <cassert>
18 
main()19 int main()
20 {
21     char c = '\0';
22     assert(!std::char_traits<char>::lt('a', 'a'));
23     assert( std::char_traits<char>::lt('A', 'a'));
24     assert(!std::char_traits<char>::lt('A' + 127, 'a'));
25     assert(!std::char_traits<char>::lt('A' - 127, 'a'));
26     assert( std::char_traits<char>::lt('A', 'a' + 127));
27     assert( std::char_traits<char>::lt('A', 'a' - 127));
28 }
29