1 //===----------------------------------------------------------------------===//
2 //
3 // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
4 // See https://llvm.org/LICENSE.txt for license information.
5 // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
6 //
7 //===----------------------------------------------------------------------===//
8
9 // <string>
10
11 // template<class charT, class traits>
12 // constexpr bool operator==(basic_string_view<charT,traits> lhs, const charT* rhs);
13 // template<class charT, class traits>
14 // constexpr bool operator==(const charT* lhs, 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.h"
21
22 template <class S>
23 void
test(S lhs,const typename S::value_type * rhs,bool x)24 test(S lhs, const typename S::value_type* rhs, bool x)
25 {
26 assert((lhs == rhs) == x);
27 assert((rhs == lhs) == x);
28 }
29
main(int,char **)30 int main(int, char**)
31 {
32 {
33 typedef std::string_view S;
34 test(S(""), "", true);
35 test(S(""), "abcde", false);
36 test(S(""), "abcdefghij", false);
37 test(S(""), "abcdefghijklmnopqrst", false);
38 test(S("abcde"), "", false);
39 test(S("abcde"), "abcde", true);
40 test(S("abcde"), "abcdefghij", false);
41 test(S("abcde"), "abcdefghijklmnopqrst", false);
42 test(S("abcdefghij"), "", false);
43 test(S("abcdefghij"), "abcde", false);
44 test(S("abcdefghij"), "abcdefghij", true);
45 test(S("abcdefghij"), "abcdefghijklmnopqrst", false);
46 test(S("abcdefghijklmnopqrst"), "", false);
47 test(S("abcdefghijklmnopqrst"), "abcde", false);
48 test(S("abcdefghijklmnopqrst"), "abcdefghij", false);
49 test(S("abcdefghijklmnopqrst"), "abcdefghijklmnopqrst", true);
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 static_assert ( sv1 == "", "" );
58 static_assert ( "" == sv1, "" );
59 static_assert (!(sv1 == "abcde"), "" );
60 static_assert (!("abcde" == sv1), "" );
61
62 static_assert ( sv2 == "abcde", "" );
63 static_assert ( "abcde" == sv2, "" );
64 static_assert (!(sv2 == "abcde0"), "" );
65 static_assert (!("abcde0" == sv2), "" );
66 }
67 #endif
68
69 return 0;
70 }
71