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(""), "", true); 36 test(S(""), "abcde", false); 37 test(S(""), "abcdefghij", false); 38 test(S(""), "abcdefghijklmnopqrst", false); 39 test(S("abcde"), "", false); 40 test(S("abcde"), "abcde", true); 41 test(S("abcde"), "abcdefghij", false); 42 test(S("abcde"), "abcdefghijklmnopqrst", false); 43 test(S("abcdefghij"), "", false); 44 test(S("abcdefghij"), "abcde", false); 45 test(S("abcdefghij"), "abcdefghij", true); 46 test(S("abcdefghij"), "abcdefghijklmnopqrst", false); 47 test(S("abcdefghijklmnopqrst"), "", false); 48 test(S("abcdefghijklmnopqrst"), "abcde", false); 49 test(S("abcdefghijklmnopqrst"), "abcdefghij", false); 50 test(S("abcdefghijklmnopqrst"), "abcdefghijklmnopqrst", true); 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 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
