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(basic_string_view str) const noexcept; 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, 25 std::basic_string_view<CharT> sv2, int expected ) { 26 assert ( sign( sv1.compare(sv2)) == sign(expected)); 27 } 28 29 30 template<typename CharT> 31 void test ( const CharT *s1, const CharT *s2, int expected ) { 32 typedef std::basic_string_view<CharT> string_view_t; 33 34 string_view_t sv1 ( s1 ); 35 string_view_t sv2 ( s2 ); 36 test1(sv1, sv2, expected); 37 } 38 39 int main(int, char**) { 40 41 test("", "", 0); 42 test("", "abcde", -5); 43 test("", "abcdefghij", -10); 44 test("", "abcdefghijklmnopqrst", -20); 45 test("abcde", "", 5); 46 test("abcde", "abcde", 0); 47 test("abcde", "abcdefghij", -5); 48 test("abcde", "abcdefghijklmnopqrst", -15); 49 test("abcdefghij", "", 10); 50 test("abcdefghij", "abcde", 5); 51 test("abcdefghij", "abcdefghij", 0); 52 test("abcdefghij", "abcdefghijklmnopqrst", -10); 53 test("abcdefghijklmnopqrst", "", 20); 54 test("abcdefghijklmnopqrst", "abcde", 15); 55 test("abcdefghijklmnopqrst", "abcdefghij", 10); 56 test("abcdefghijklmnopqrst", "abcdefghijklmnopqrst", 0); 57 58 test(L"", L"", 0); 59 test(L"", L"abcde", -5); 60 test(L"", L"abcdefghij", -10); 61 test(L"", L"abcdefghijklmnopqrst", -20); 62 test(L"abcde", L"", 5); 63 test(L"abcde", L"abcde", 0); 64 test(L"abcde", L"abcdefghij", -5); 65 test(L"abcde", L"abcdefghijklmnopqrst", -15); 66 test(L"abcdefghij", L"", 10); 67 test(L"abcdefghij", L"abcde", 5); 68 test(L"abcdefghij", L"abcdefghij", 0); 69 test(L"abcdefghij", L"abcdefghijklmnopqrst", -10); 70 test(L"abcdefghijklmnopqrst", L"", 20); 71 test(L"abcdefghijklmnopqrst", L"abcde", 15); 72 test(L"abcdefghijklmnopqrst", L"abcdefghij", 10); 73 test(L"abcdefghijklmnopqrst", L"abcdefghijklmnopqrst", 0); 74 75 #if TEST_STD_VER >= 11 76 test(u"", u"", 0); 77 test(u"", u"abcde", -5); 78 test(u"", u"abcdefghij", -10); 79 test(u"", u"abcdefghijklmnopqrst", -20); 80 test(u"abcde", u"", 5); 81 test(u"abcde", u"abcde", 0); 82 test(u"abcde", u"abcdefghij", -5); 83 test(u"abcde", u"abcdefghijklmnopqrst", -15); 84 test(u"abcdefghij", u"", 10); 85 test(u"abcdefghij", u"abcde", 5); 86 test(u"abcdefghij", u"abcdefghij", 0); 87 test(u"abcdefghij", u"abcdefghijklmnopqrst", -10); 88 test(u"abcdefghijklmnopqrst", u"", 20); 89 test(u"abcdefghijklmnopqrst", u"abcde", 15); 90 test(u"abcdefghijklmnopqrst", u"abcdefghij", 10); 91 test(u"abcdefghijklmnopqrst", u"abcdefghijklmnopqrst", 0); 92 93 test(U"", U"", 0); 94 test(U"", U"abcde", -5); 95 test(U"", U"abcdefghij", -10); 96 test(U"", U"abcdefghijklmnopqrst", -20); 97 test(U"abcde", U"", 5); 98 test(U"abcde", U"abcde", 0); 99 test(U"abcde", U"abcdefghij", -5); 100 test(U"abcde", U"abcdefghijklmnopqrst", -15); 101 test(U"abcdefghij", U"", 10); 102 test(U"abcdefghij", U"abcde", 5); 103 test(U"abcdefghij", U"abcdefghij", 0); 104 test(U"abcdefghij", U"abcdefghijklmnopqrst", -10); 105 test(U"abcdefghijklmnopqrst", U"", 20); 106 test(U"abcdefghijklmnopqrst", U"abcde", 15); 107 test(U"abcdefghijklmnopqrst", U"abcdefghij", 10); 108 test(U"abcdefghijklmnopqrst", U"abcdefghijklmnopqrst", 0); 109 #endif 110 111 #if TEST_STD_VER > 11 112 { 113 typedef std::basic_string_view<char, constexpr_char_traits<char>> SV; 114 constexpr SV sv1 { "abcde", 5 }; 115 constexpr SV sv2 { "abcde", 5 }; 116 constexpr SV sv3 { "edcba0", 6 }; 117 static_assert ( sv1.compare(sv2) == 0, "" ); 118 static_assert ( sv2.compare(sv1) == 0, "" ); 119 static_assert ( sv3.compare(sv2) > 0, "" ); 120 static_assert ( sv2.compare(sv3) < 0, "" ); 121 } 122 #endif 123 124 return 0; 125 } 126