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(""), "", false);
35 test(S(""), "abcde", true);
36 test(S(""), "abcdefghij", true);
37 test(S(""), "abcdefghijklmnopqrst", true);
38 test(S("abcde"), "", true);
39 test(S("abcde"), "abcde", false);
40 test(S("abcde"), "abcdefghij", true);
41 test(S("abcde"), "abcdefghijklmnopqrst", true);
42 test(S("abcdefghij"), "", true);
43 test(S("abcdefghij"), "abcde", true);
44 test(S("abcdefghij"), "abcdefghij", false);
45 test(S("abcdefghij"), "abcdefghijklmnopqrst", true);
46 test(S("abcdefghijklmnopqrst"), "", true);
47 test(S("abcdefghijklmnopqrst"), "abcde", true);
48 test(S("abcdefghijklmnopqrst"), "abcdefghij", true);
49 test(S("abcdefghijklmnopqrst"), "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 { "abcde", 5 };
57
58 static_assert (!(sv1 != ""), "" );
59 static_assert (!("" != sv1), "" );
60 static_assert ( sv1 != "abcde", "" );
61 static_assert ( "abcde" != sv1, "" );
62
63 static_assert (!(sv2 != "abcde"), "" );
64 static_assert (!("abcde" != sv2), "" );
65 static_assert ( sv2 != "abcde0", "" );
66 static_assert ( "abcde0" != sv2, "" );
67 }
68 #endif
69
70 return 0;
71 }
72