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, const charT* rhs);
14 // template<class charT, class traits>
15 // constexpr bool operator!=(const charT* lhs, basic_string_view<charT,traits> rhs);
16
17 #include <experimental/string_view>
18 #include <cassert>
19
20 #include "constexpr_char_traits.hpp"
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()30 int main()
31 {
32 {
33 typedef std::experimental::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 _LIBCPP_STD_VER > 11
53 {
54 typedef std::experimental::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