63 lines · cpp
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-exception6//7//===----------------------------------------------------------------------===//8 9// <string>10 11// template<class charT, class traits, class Allocator>12// bool operator<=(const basic_string<charT,traits,Allocator>& lhs,13// const basic_string<charT,traits,Allocator>& rhs); // constexpr since C++2014 15#include <string>16#include <cassert>17 18#include "test_macros.h"19#include "min_allocator.h"20 21template <class S>22TEST_CONSTEXPR_CXX20 void test(const S& lhs, const S& rhs, bool x) {23 assert((lhs <= rhs) == x);24}25 26template <class S>27TEST_CONSTEXPR_CXX20 void test_string() {28 test(S(""), S(""), true);29 test(S(""), S("abcde"), true);30 test(S(""), S("abcdefghij"), true);31 test(S(""), S("abcdefghijklmnopqrst"), true);32 test(S("abcde"), S(""), false);33 test(S("abcde"), S("abcde"), true);34 test(S("abcde"), S("abcdefghij"), true);35 test(S("abcde"), S("abcdefghijklmnopqrst"), true);36 test(S("abcdefghij"), S(""), false);37 test(S("abcdefghij"), S("abcde"), false);38 test(S("abcdefghij"), S("abcdefghij"), true);39 test(S("abcdefghij"), S("abcdefghijklmnopqrst"), true);40 test(S("abcdefghijklmnopqrst"), S(""), false);41 test(S("abcdefghijklmnopqrst"), S("abcde"), false);42 test(S("abcdefghijklmnopqrst"), S("abcdefghij"), false);43 test(S("abcdefghijklmnopqrst"), S("abcdefghijklmnopqrst"), true);44}45 46TEST_CONSTEXPR_CXX20 bool test() {47 test_string<std::string>();48#if TEST_STD_VER >= 1149 test_string<std::basic_string<char, std::char_traits<char>, min_allocator<char> > >();50#endif51 52 return true;53}54 55int main(int, char**) {56 test();57#if TEST_STD_VER > 1758 static_assert(test());59#endif60 61 return 0;62}63