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 <experimental/string_view>
17 #include <cassert>
18
19 #include "constexpr_char_traits.hpp"
20
21 template <class S>
22 void
test(const S & lhs,const S & rhs,bool x,bool y)23 test(const S& lhs, const S& rhs, bool x, bool y)
24 {
25 assert((lhs < rhs) == x);
26 assert((rhs < lhs) == y);
27 }
28
main()29 int main()
30 {
31 {
32 typedef std::experimental::string_view S;
33 test(S(""), S(""), false, false);
34 test(S(""), S("abcde"), true, false);
35 test(S(""), S("abcdefghij"), true, false);
36 test(S(""), S("abcdefghijklmnopqrst"), true, false);
37 test(S("abcde"), S(""), false, true);
38 test(S("abcde"), S("abcde"), false, false);
39 test(S("abcde"), S("abcdefghij"), true, false);
40 test(S("abcde"), S("abcdefghijklmnopqrst"), true, false);
41 test(S("abcdefghij"), S(""), false, true);
42 test(S("abcdefghij"), S("abcde"), false, true);
43 test(S("abcdefghij"), S("abcdefghij"), false, false);
44 test(S("abcdefghij"), S("abcdefghijklmnopqrst"), true, false);
45 test(S("abcdefghijklmnopqrst"), S(""), false, true);
46 test(S("abcdefghijklmnopqrst"), S("abcde"), false, true);
47 test(S("abcdefghijklmnopqrst"), S("abcdefghij"), false, true);
48 test(S("abcdefghijklmnopqrst"), S("abcdefghijklmnopqrst"), false, false);
49 }
50
51 #if _LIBCPP_STD_VER > 11
52 {
53 typedef std::experimental::basic_string_view<char, constexpr_char_traits<char>> SV;
54 constexpr SV sv1;
55 constexpr SV sv2 { "abcde", 5 };
56
57 static_assert (!(sv1 < sv1), "" );
58 static_assert (!(sv2 < sv2), "" );
59
60 static_assert ( sv1 < sv2, "" );
61 static_assert (!(sv2 < sv1), "" );
62 }
63 #endif
64 }
65