forked from OSchip/llvm-project
77 lines
1.9 KiB
C++
77 lines
1.9 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>& assign(const charT* s); // constexpr since C++20
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#include <string>
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#include <stdexcept>
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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 s, const typename S::value_type* str, S expected)
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{
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s.assign(str);
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LIBCPP_ASSERT(s.__invariants());
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assert(s == expected);
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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(), "", S());
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test(S(), "12345", S("12345"));
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test(S(), "12345678901234567890", S("12345678901234567890"));
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test(S("12345"), "", S());
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test(S("12345"), "12345", S("12345"));
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test(S("12345"), "1234567890", S("1234567890"));
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test(S("12345678901234567890"), "", S());
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test(S("12345678901234567890"), "12345", S("12345"));
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test(S("12345678901234567890"), "12345678901234567890",
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S("12345678901234567890"));
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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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{ // test assignment to self
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typedef std::string S;
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S s_short = "123/";
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S s_long = "Lorem ipsum dolor sit amet, consectetur/";
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s_short.assign(s_short.c_str());
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assert(s_short == "123/");
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s_short.assign(s_short.c_str() + 2);
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assert(s_short == "3/");
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s_long.assign(s_long.c_str() + 30);
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assert(s_long == "nsectetur/");
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}
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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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