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_view>
11
12// template<class charT, class traits, class Allocator>
13//   constexpr bool operator!=(const basic_string_view<charT,traits> lhs,
14//                   const basic_string_view<charT,traits> rhs);
15
16#include <string_view>
17#include <cassert>
18
19#include "test_macros.h"
20#include "constexpr_char_traits.hpp"
21
22template <class S>
23void
24test(S lhs, S rhs, bool x)
25{
26    assert((lhs != rhs) == x);
27    assert((rhs != lhs) == x);
28}
29
30int main()
31{
32    {
33    typedef std::string_view S;
34    test(S(""), S(""), false);
35    test(S(""), S("abcde"), true);
36    test(S(""), S("abcdefghij"), true);
37    test(S(""), S("abcdefghijklmnopqrst"), true);
38    test(S("abcde"), S(""), true);
39    test(S("abcde"), S("abcde"), false);
40    test(S("abcde"), S("abcdefghij"), true);
41    test(S("abcde"), S("abcdefghijklmnopqrst"), true);
42    test(S("abcdefghij"), S(""), true);
43    test(S("abcdefghij"), S("abcde"), true);
44    test(S("abcdefghij"), S("abcdefghij"), false);
45    test(S("abcdefghij"), S("abcdefghijklmnopqrst"), true);
46    test(S("abcdefghijklmnopqrst"), S(""), true);
47    test(S("abcdefghijklmnopqrst"), S("abcde"), true);
48    test(S("abcdefghijklmnopqrst"), S("abcdefghij"), true);
49    test(S("abcdefghijklmnopqrst"), S("abcdefghijklmnopqrst"), false);
50    }
51
52#if TEST_STD_VER > 11
53    {
54    typedef std::basic_string_view<char, constexpr_char_traits<char>> SV;
55    constexpr SV  sv1;
56    constexpr SV  sv2;
57    constexpr SV  sv3 { "abcde", 5 };
58    static_assert (!( sv1 != sv2), "" );
59    static_assert (   sv1 != sv3,  "" );
60    }
61#endif
62}
63