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 // UNSUPPORTED: !stdlib=libc++ && (c++03 || c++11 || c++14) 10 11 // <string_view> 12 13 // constexpr int compare(const charT* s) const; 14 15 #include <string_view> 16 #include <cassert> 17 18 #include "test_macros.h" 19 #include "constexpr_char_traits.h" 20 21 int sign ( int x ) { return x > 0 ? 1 : ( x < 0 ? -1 : 0 ); } 22 23 template<typename CharT> 24 void test1 ( std::basic_string_view<CharT> sv1, const CharT *s, int expected ) { 25 assert ( sign( sv1.compare(s)) == sign(expected)); 26 } 27 28 template<typename CharT> 29 void 30 test( const CharT *s1, const CharT *s2, int expected) 31 { 32 typedef std::basic_string_view<CharT> string_view_t; 33 string_view_t sv1 ( s1 ); 34 test1 ( sv1, s2, expected ); 35 } 36 37 int main(int, char**) 38 { 39 { 40 test("", "", 0); 41 test("", "abcde", -5); 42 test("", "abcdefghij", -10); 43 test("", "abcdefghijklmnopqrst", -20); 44 test("abcde", "", 5); 45 test("abcde", "abcde", 0); 46 test("abcde", "abcdefghij", -5); 47 test("abcde", "abcdefghijklmnopqrst", -15); 48 test("abcdefghij", "", 10); 49 test("abcdefghij", "abcde", 5); 50 test("abcdefghij", "abcdefghij", 0); 51 test("abcdefghij", "abcdefghijklmnopqrst", -10); 52 test("abcdefghijklmnopqrst", "", 20); 53 test("abcdefghijklmnopqrst", "abcde", 15); 54 test("abcdefghijklmnopqrst", "abcdefghij", 10); 55 test("abcdefghijklmnopqrst", "abcdefghijklmnopqrst", 0); 56 } 57 58 { 59 test(L"", L"", 0); 60 test(L"", L"abcde", -5); 61 test(L"", L"abcdefghij", -10); 62 test(L"", L"abcdefghijklmnopqrst", -20); 63 test(L"abcde", L"", 5); 64 test(L"abcde", L"abcde", 0); 65 test(L"abcde", L"abcdefghij", -5); 66 test(L"abcde", L"abcdefghijklmnopqrst", -15); 67 test(L"abcdefghij", L"", 10); 68 test(L"abcdefghij", L"abcde", 5); 69 test(L"abcdefghij", L"abcdefghij", 0); 70 test(L"abcdefghij", L"abcdefghijklmnopqrst", -10); 71 test(L"abcdefghijklmnopqrst", L"", 20); 72 test(L"abcdefghijklmnopqrst", L"abcde", 15); 73 test(L"abcdefghijklmnopqrst", L"abcdefghij", 10); 74 test(L"abcdefghijklmnopqrst", L"abcdefghijklmnopqrst", 0); 75 } 76 77 #if TEST_STD_VER >= 11 78 { 79 test(U"", U"", 0); 80 test(U"", U"abcde", -5); 81 test(U"", U"abcdefghij", -10); 82 test(U"", U"abcdefghijklmnopqrst", -20); 83 test(U"abcde", U"", 5); 84 test(U"abcde", U"abcde", 0); 85 test(U"abcde", U"abcdefghij", -5); 86 test(U"abcde", U"abcdefghijklmnopqrst", -15); 87 test(U"abcdefghij", U"", 10); 88 test(U"abcdefghij", U"abcde", 5); 89 test(U"abcdefghij", U"abcdefghij", 0); 90 test(U"abcdefghij", U"abcdefghijklmnopqrst", -10); 91 test(U"abcdefghijklmnopqrst", U"", 20); 92 test(U"abcdefghijklmnopqrst", U"abcde", 15); 93 test(U"abcdefghijklmnopqrst", U"abcdefghij", 10); 94 test(U"abcdefghijklmnopqrst", U"abcdefghijklmnopqrst", 0); 95 } 96 97 { 98 test(u"", u"", 0); 99 test(u"", u"abcde", -5); 100 test(u"", u"abcdefghij", -10); 101 test(u"", u"abcdefghijklmnopqrst", -20); 102 test(u"abcde", u"", 5); 103 test(u"abcde", u"abcde", 0); 104 test(u"abcde", u"abcdefghij", -5); 105 test(u"abcde", u"abcdefghijklmnopqrst", -15); 106 test(u"abcdefghij", u"", 10); 107 test(u"abcdefghij", u"abcde", 5); 108 test(u"abcdefghij", u"abcdefghij", 0); 109 test(u"abcdefghij", u"abcdefghijklmnopqrst", -10); 110 test(u"abcdefghijklmnopqrst", u"", 20); 111 test(u"abcdefghijklmnopqrst", u"abcde", 15); 112 test(u"abcdefghijklmnopqrst", u"abcdefghij", 10); 113 test(u"abcdefghijklmnopqrst", u"abcdefghijklmnopqrst", 0); 114 } 115 #endif 116 117 #if TEST_STD_VER > 11 118 { 119 typedef std::basic_string_view<char, constexpr_char_traits<char>> SV; 120 constexpr SV sv1; 121 constexpr SV sv2 { "abcde", 5 }; 122 static_assert ( sv1.compare("") == 0, "" ); 123 static_assert ( sv1.compare("abcde") < 0, "" ); 124 static_assert ( sv2.compare("") > 0, "" ); 125 static_assert ( sv2.compare("abcde") == 0, "" ); 126 } 127 #endif 128 129 return 0; 130 } 131