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 <string_view> 18 #include <cassert> 19 20 #include "test_macros.h" 21 #include "constexpr_char_traits.hpp" 22 23 template <class S> 24 void 25 test(S lhs, const typename S::value_type* rhs, bool x) 26 { 27 assert((lhs != rhs) == x); 28 assert((rhs != lhs) == x); 29 } 30 31 int main() 32 { 33 { 34 typedef std::string_view S; 35 test(S(""), "", false); 36 test(S(""), "abcde", true); 37 test(S(""), "abcdefghij", true); 38 test(S(""), "abcdefghijklmnopqrst", true); 39 test(S("abcde"), "", true); 40 test(S("abcde"), "abcde", false); 41 test(S("abcde"), "abcdefghij", true); 42 test(S("abcde"), "abcdefghijklmnopqrst", true); 43 test(S("abcdefghij"), "", true); 44 test(S("abcdefghij"), "abcde", true); 45 test(S("abcdefghij"), "abcdefghij", false); 46 test(S("abcdefghij"), "abcdefghijklmnopqrst", true); 47 test(S("abcdefghijklmnopqrst"), "", true); 48 test(S("abcdefghijklmnopqrst"), "abcde", true); 49 test(S("abcdefghijklmnopqrst"), "abcdefghij", true); 50 test(S("abcdefghijklmnopqrst"), "abcdefghijklmnopqrst", false); 51 } 52 53 #if TEST_STD_VER > 11 54 { 55 typedef std::basic_string_view<char, constexpr_char_traits<char>> SV; 56 constexpr SV sv1; 57 constexpr SV sv2 { "abcde", 5 }; 58 59 static_assert (!(sv1 != ""), "" ); 60 static_assert (!("" != sv1), "" ); 61 static_assert ( sv1 != "abcde", "" ); 62 static_assert ( "abcde" != sv1, "" ); 63 64 static_assert (!(sv2 != "abcde"), "" ); 65 static_assert (!("abcde" != sv2), "" ); 66 static_assert ( sv2 != "abcde0", "" ); 67 static_assert ( "abcde0" != sv2, "" ); 68 } 69 #endif 70 } 71
