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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>& append(const charT* s); // constexpr since C++20
#include <string>
#include <stdexcept>
#include <cassert>
#include "test_macros.h"
#include "min_allocator.h"
template <class S>
TEST_CONSTEXPR_CXX20 void
test(S s, const typename S::value_type* str, S expected)
{
s.append(str);
LIBCPP_ASSERT(s.__invariants());
assert(s == expected);
}
TEST_CONSTEXPR_CXX20 bool test() {
{
typedef std::string S;
test(S(), "", S());
test(S(), "12345", S("12345"));
test(S(), "12345678901234567890", S("12345678901234567890"));
test(S("12345"), "", S("12345"));
test(S("12345"), "12345", S("1234512345"));
test(S("12345"), "1234567890", S("123451234567890"));
test(S("12345678901234567890"), "", S("12345678901234567890"));
test(S("12345678901234567890"), "12345", S("1234567890123456789012345"));
test(S("12345678901234567890"), "12345678901234567890",
S("1234567890123456789012345678901234567890"));
}
#if TEST_STD_VER >= 11
{
typedef std::basic_string<char, std::char_traits<char>, min_allocator<char>> S;
test(S(), "", S());
test(S(), "12345", S("12345"));
test(S(), "12345678901234567890", S("12345678901234567890"));
test(S("12345"), "", S("12345"));
test(S("12345"), "12345", S("1234512345"));
test(S("12345"), "1234567890", S("123451234567890"));
test(S("12345678901234567890"), "", S("12345678901234567890"));
test(S("12345678901234567890"), "12345", S("1234567890123456789012345"));
test(S("12345678901234567890"), "12345678901234567890",
S("1234567890123456789012345678901234567890"));
}
#endif
{ // test appending to self
typedef std::string S;
S s_short = "123/";
S s_long = "Lorem ipsum dolor sit amet, consectetur/";
s_short.append(s_short.c_str());
assert(s_short == "123/123/");
s_short.append(s_short.c_str());
assert(s_short == "123/123/123/123/");
s_short.append(s_short.c_str());
assert(s_short == "123/123/123/123/123/123/123/123/");
s_long.append(s_long.c_str());
assert(s_long == "Lorem ipsum dolor sit amet, consectetur/Lorem ipsum dolor sit amet, consectetur/");
}
return true;
}
int main(int, char**)
{
test();
#if TEST_STD_VER > 17
static_assert(test());
#endif
return 0;
}
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