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 int compare(const char_type* s1, const char_type* s2, size_t n);
15
16#include <string>
17#include <cassert>
18
19int main()
20{
21    assert(std::char_traits<char>::compare("", "", 0) == 0);
22    assert(std::char_traits<char>::compare(NULL, NULL, 0) == 0);
23
24    assert(std::char_traits<char>::compare("1", "1", 1) == 0);
25    assert(std::char_traits<char>::compare("1", "2", 1) < 0);
26    assert(std::char_traits<char>::compare("2", "1", 1) > 0);
27
28    assert(std::char_traits<char>::compare("12", "12", 2) == 0);
29    assert(std::char_traits<char>::compare("12", "13", 2) < 0);
30    assert(std::char_traits<char>::compare("12", "22", 2) < 0);
31    assert(std::char_traits<char>::compare("13", "12", 2) > 0);
32    assert(std::char_traits<char>::compare("22", "12", 2) > 0);
33
34    assert(std::char_traits<char>::compare("123", "123", 3) == 0);
35    assert(std::char_traits<char>::compare("123", "223", 3) < 0);
36    assert(std::char_traits<char>::compare("123", "133", 3) < 0);
37    assert(std::char_traits<char>::compare("123", "124", 3) < 0);
38    assert(std::char_traits<char>::compare("223", "123", 3) > 0);
39    assert(std::char_traits<char>::compare("133", "123", 3) > 0);
40    assert(std::char_traits<char>::compare("124", "123", 3) > 0);
41}
42