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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
//
//===----------------------------------------------------------------------===//
// UNSUPPORTED: c++03
// <sstream>
// template <class charT, class traits = char_traits<charT>, class Allocator = allocator<charT> >
// class basic_stringbuf
// basic_stringbuf& operator=(basic_stringbuf&& rhs);
#include <sstream>
#include <cassert>
#include <utility>
#include "make_string.h"
#include "test_macros.h"
#define STR(S) MAKE_STRING(CharT, S)
template <class CharT>
struct test_stringbuf : std::basic_stringbuf<CharT> {
using std::basic_stringbuf<CharT>::basic_stringbuf;
// Checks the following requirement after being moved from:
// The six pointers of std::basic_streambuf in *this are guaranteed to be different
// from the corresponding pointers in the moved-from rhs unless null.
void check_different_pointers(test_stringbuf<CharT> const& other) const {
assert(this->eback() == nullptr || this->eback() != other.eback());
assert(this->gptr() == nullptr || this->gptr() != other.gptr());
assert(this->egptr() == nullptr || this->egptr() != other.egptr());
assert(this->pbase() == nullptr || this->pbase() != other.pbase());
assert(this->pptr() == nullptr || this->pptr() != other.pptr());
assert(this->epptr() == nullptr || this->epptr() != other.epptr());
}
};
template <class CharT>
void test() {
std::basic_string<CharT> strings[] = {STR(""), STR("short"), STR("loooooooooooooooooooong")};
for (std::basic_string<CharT> const& s : strings) {
{
test_stringbuf<CharT> buf1(s);
test_stringbuf<CharT> buf;
buf = std::move(buf1);
assert(buf.str() == s);
buf.check_different_pointers(buf1);
}
{
test_stringbuf<CharT> buf1(s, std::ios_base::in);
test_stringbuf<CharT> buf;
buf = std::move(buf1);
assert(buf.str() == s);
buf.check_different_pointers(buf1);
}
{
test_stringbuf<CharT> buf1(s, std::ios_base::out);
test_stringbuf<CharT> buf;
buf = std::move(buf1);
assert(buf.str() == s);
buf.check_different_pointers(buf1);
}
{
test_stringbuf<CharT> buf1;
test_stringbuf<CharT> buf;
buf = std::move(buf1);
buf.check_different_pointers(buf1);
}
// Use the assignment operator on an actual std::stringbuf, not test_stringbuf
{
std::basic_stringbuf<CharT> buf1(s);
std::basic_stringbuf<CharT> buf;
buf = std::move(buf1);
assert(buf.str() == s);
}
}
}
int main(int, char**) {
test<char>();
#ifndef TEST_HAS_NO_WIDE_CHARACTERS
test<wchar_t>();
#endif
return 0;
}
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