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