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<class charT, class traits>
13//   constexpr bool operator<(basic_string_view<charT,traits> lhs,
14//                  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(const S& lhs, const S& rhs, bool x, bool y)
25{
26    assert((lhs < rhs) == x);
27    assert((rhs < lhs) == y);
28}
29
30int main()
31{
32    {
33    typedef std::string_view S;
34    test(S(""), S(""), false, false);
35    test(S(""), S("abcde"), true, false);
36    test(S(""), S("abcdefghij"), true, false);
37    test(S(""), S("abcdefghijklmnopqrst"), true, false);
38    test(S("abcde"), S(""), false, true);
39    test(S("abcde"), S("abcde"), false, false);
40    test(S("abcde"), S("abcdefghij"), true, false);
41    test(S("abcde"), S("abcdefghijklmnopqrst"), true, false);
42    test(S("abcdefghij"), S(""), false, true);
43    test(S("abcdefghij"), S("abcde"), false, true);
44    test(S("abcdefghij"), S("abcdefghij"), false, false);
45    test(S("abcdefghij"), S("abcdefghijklmnopqrst"), true, false);
46    test(S("abcdefghijklmnopqrst"), S(""), false, true);
47    test(S("abcdefghijklmnopqrst"), S("abcde"), false, true);
48    test(S("abcdefghijklmnopqrst"), S("abcdefghij"), false, true);
49    test(S("abcdefghijklmnopqrst"), S("abcdefghijklmnopqrst"), false, 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 { "abcde", 5 };
57
58    static_assert (!(sv1 < sv1), "" );
59    static_assert (!(sv2 < sv2), "" );
60
61    static_assert (  sv1 < sv2,  "" );
62    static_assert (!(sv2 < sv1), "" );
63    }
64#endif
65}
66