57 lines
1.3 KiB
C++
57 lines
1.3 KiB
C++
//===----------------------------------------------------------------------===//
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//
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// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
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// See https://llvm.org/LICENSE.txt for license information.
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// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
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//
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//===----------------------------------------------------------------------===//
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// <string>
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// basic_string<charT,traits,Allocator>& operator=(charT c); // constexpr since C++20
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#include <string>
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#include <cassert>
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#include "test_macros.h"
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#include "min_allocator.h"
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template <class S>
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TEST_CONSTEXPR_CXX20 void
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test(S s1, typename S::value_type s2)
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{
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typedef typename S::traits_type T;
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s1 = s2;
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LIBCPP_ASSERT(s1.__invariants());
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assert(s1.size() == 1);
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assert(T::eq(s1[0], s2));
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assert(s1.capacity() >= s1.size());
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}
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template <class S>
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TEST_CONSTEXPR_CXX20 void test_string() {
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test(S(), 'a');
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test(S("1"), 'a');
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test(S("123456789"), 'a');
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test(S("1234567890123456789012345678901234567890123456789012345678901234567890"), 'a');
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}
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TEST_CONSTEXPR_CXX20 bool test() {
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test_string<std::string>();
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#if TEST_STD_VER >= 11
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test_string<std::basic_string<char, std::char_traits<char>, min_allocator<char>>>();
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#endif
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return true;
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}
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int main(int, char**)
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{
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test();
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#if TEST_STD_VER > 17
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static_assert(test());
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#endif
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return 0;
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}
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