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 // <string> 10 11 // int compare(const basic_string& str) const 12 13 #include <string> 14 #include <cassert> 15 16 #include "test_macros.h" 17 #include "min_allocator.h" 18 19 TEST_CONSTEXPR_CXX20 int sign(int x) 20 { 21 if (x == 0) 22 return 0; 23 if (x < 0) 24 return -1; 25 return 1; 26 } 27 28 template <class S> 29 TEST_CONSTEXPR_CXX20 void 30 test(const S& s, const S& str, int x) 31 { 32 LIBCPP_ASSERT_NOEXCEPT(s.compare(str)); 33 assert(sign(s.compare(str)) == sign(x)); 34 } 35 36 bool test() { 37 { 38 typedef std::string S; 39 test(S(""), S(""), 0); 40 test(S(""), S("abcde"), -5); 41 test(S(""), S("abcdefghij"), -10); 42 test(S(""), S("abcdefghijklmnopqrst"), -20); 43 test(S("abcde"), S(""), 5); 44 test(S("abcde"), S("abcde"), 0); 45 test(S("abcde"), S("abcdefghij"), -5); 46 test(S("abcde"), S("abcdefghijklmnopqrst"), -15); 47 test(S("abcdefghij"), S(""), 10); 48 test(S("abcdefghij"), S("abcde"), 5); 49 test(S("abcdefghij"), S("abcdefghij"), 0); 50 test(S("abcdefghij"), S("abcdefghijklmnopqrst"), -10); 51 test(S("abcdefghijklmnopqrst"), S(""), 20); 52 test(S("abcdefghijklmnopqrst"), S("abcde"), 15); 53 test(S("abcdefghijklmnopqrst"), S("abcdefghij"), 10); 54 test(S("abcdefghijklmnopqrst"), S("abcdefghijklmnopqrst"), 0); 55 } 56 #if TEST_STD_VER >= 11 57 { 58 typedef std::basic_string<char, std::char_traits<char>, min_allocator<char>> S; 59 test(S(""), S(""), 0); 60 test(S(""), S("abcde"), -5); 61 test(S(""), S("abcdefghij"), -10); 62 test(S(""), S("abcdefghijklmnopqrst"), -20); 63 test(S("abcde"), S(""), 5); 64 test(S("abcde"), S("abcde"), 0); 65 test(S("abcde"), S("abcdefghij"), -5); 66 test(S("abcde"), S("abcdefghijklmnopqrst"), -15); 67 test(S("abcdefghij"), S(""), 10); 68 test(S("abcdefghij"), S("abcde"), 5); 69 test(S("abcdefghij"), S("abcdefghij"), 0); 70 test(S("abcdefghij"), S("abcdefghijklmnopqrst"), -10); 71 test(S("abcdefghijklmnopqrst"), S(""), 20); 72 test(S("abcdefghijklmnopqrst"), S("abcde"), 15); 73 test(S("abcdefghijklmnopqrst"), S("abcdefghij"), 10); 74 test(S("abcdefghijklmnopqrst"), S("abcdefghijklmnopqrst"), 0); 75 } 76 #endif 77 78 #if TEST_STD_VER > 3 79 { // LWG 2946 80 std::string s = " !"; 81 assert(s.compare({"abc", 1}) < 0); 82 } 83 #endif 84 85 return true; 86 } 87 88 int main(int, char**) 89 { 90 test(); 91 #if TEST_STD_VER > 17 92 // static_assert(test()); 93 #endif 94 95 return 0; 96 } 97