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