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//===----------------------------------------------------------------------===//
//
// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
// See https://llvm.org/LICENSE.txt for license information.
// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
//
//===----------------------------------------------------------------------===//
// <string>
// basic_string<charT,traits,Allocator>&
// operator+=(const basic_string<charT,traits,Allocator>& str);
#include <string>
#include <cassert>
#include "test_macros.h"
#include "min_allocator.h"
template <class S>
void
test(S s, S str, S expected)
{
s += str;
LIBCPP_ASSERT(s.__invariants());
assert(s == expected);
}
int main(int, char**)
{
{
typedef std::string S;
test(S(), S(), S());
test(S(), S("12345"), S("12345"));
test(S(), S("1234567890"), S("1234567890"));
test(S(), S("12345678901234567890"), S("12345678901234567890"));
test(S("12345"), S(), S("12345"));
test(S("12345"), S("12345"), S("1234512345"));
test(S("12345"), S("1234567890"), S("123451234567890"));
test(S("12345"), S("12345678901234567890"), S("1234512345678901234567890"));
test(S("1234567890"), S(), S("1234567890"));
test(S("1234567890"), S("12345"), S("123456789012345"));
test(S("1234567890"), S("1234567890"), S("12345678901234567890"));
test(S("1234567890"), S("12345678901234567890"), S("123456789012345678901234567890"));
test(S("12345678901234567890"), S(), S("12345678901234567890"));
test(S("12345678901234567890"), S("12345"), S("1234567890123456789012345"));
test(S("12345678901234567890"), S("1234567890"), S("123456789012345678901234567890"));
test(S("12345678901234567890"), S("12345678901234567890"),
S("1234567890123456789012345678901234567890"));
}
#if TEST_STD_VER >= 11
{
typedef std::basic_string<char, std::char_traits<char>, min_allocator<char>> S;
test(S(), S(), S());
test(S(), S("12345"), S("12345"));
test(S(), S("1234567890"), S("1234567890"));
test(S(), S("12345678901234567890"), S("12345678901234567890"));
test(S("12345"), S(), S("12345"));
test(S("12345"), S("12345"), S("1234512345"));
test(S("12345"), S("1234567890"), S("123451234567890"));
test(S("12345"), S("12345678901234567890"), S("1234512345678901234567890"));
test(S("1234567890"), S(), S("1234567890"));
test(S("1234567890"), S("12345"), S("123456789012345"));
test(S("1234567890"), S("1234567890"), S("12345678901234567890"));
test(S("1234567890"), S("12345678901234567890"), S("123456789012345678901234567890"));
test(S("12345678901234567890"), S(), S("12345678901234567890"));
test(S("12345678901234567890"), S("12345"), S("1234567890123456789012345"));
test(S("12345678901234567890"), S("1234567890"), S("123456789012345678901234567890"));
test(S("12345678901234567890"), S("12345678901234567890"),
S("1234567890123456789012345678901234567890"));
}
#endif
#if TEST_STD_VER > 3
{ // LWG 2946
std::string s;
s += {"abc", 1};
assert(s.size() == 1);
assert(s == "a");
}
#endif
return 0;
}
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