d6a92611eb
Differential Revision: https://reviews.llvm.org/D154499 Co-authored-by: Louis Dionne <ldionne.2@gmail.com>
96 lines
3.2 KiB
C++
96 lines
3.2 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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// UNSUPPORTED: c++03
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// <sstream>
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// template <class charT, class traits = char_traits<charT>, class Allocator = allocator<charT> >
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// class basic_stringbuf
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// basic_stringbuf(basic_stringbuf&& rhs);
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#include <sstream>
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#include <cassert>
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#include <utility>
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#include "make_string.h"
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#include "test_macros.h"
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#define STR(S) MAKE_STRING(CharT, S)
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template <class CharT>
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struct test_stringbuf : std::basic_stringbuf<CharT> {
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using std::basic_stringbuf<CharT>::basic_stringbuf;
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test_stringbuf(std::basic_stringbuf<CharT>&& other) : std::basic_stringbuf<CharT>(std::move(other)) {}
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// Checks the following requirement after being moved from:
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// The six pointers of std::basic_streambuf in *this are guaranteed to be different
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// from the corresponding pointers in the moved-from rhs unless null.
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void check_different_pointers(test_stringbuf<CharT> const& other) const {
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assert(this->eback() == nullptr || this->eback() != other.eback());
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assert(this->gptr() == nullptr || this->gptr() != other.gptr());
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assert(this->egptr() == nullptr || this->egptr() != other.egptr());
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assert(this->pbase() == nullptr || this->pbase() != other.pbase());
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assert(this->pptr() == nullptr || this->pptr() != other.pptr());
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assert(this->epptr() == nullptr || this->epptr() != other.epptr());
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}
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};
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template <class CharT>
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void test() {
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std::basic_string<CharT> strings[] = {STR(""), STR("short"), STR("loooooooooooooooooooong")};
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for (std::basic_string<CharT> const& s : strings) {
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using StringBuf = std::basic_stringbuf<CharT>;
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{
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test_stringbuf<CharT> buf1(s);
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test_stringbuf<CharT> buf(std::move(static_cast<StringBuf&>(buf1)));
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assert(buf.str() == s);
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assert(buf1.str().empty());
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buf.check_different_pointers(buf1);
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}
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{
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test_stringbuf<CharT> buf1(s, std::ios_base::in);
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test_stringbuf<CharT> buf(std::move(static_cast<StringBuf&>(buf1)));
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assert(buf.str() == s);
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assert(buf1.str().empty());
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buf.check_different_pointers(buf1);
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}
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{
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test_stringbuf<CharT> buf1(s, std::ios_base::out);
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test_stringbuf<CharT> buf(std::move(static_cast<StringBuf&>(buf1)));
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assert(buf.str() == s);
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assert(buf1.str().empty());
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buf.check_different_pointers(buf1);
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}
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{
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test_stringbuf<CharT> buf1;
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test_stringbuf<CharT> buf(std::move(static_cast<StringBuf&>(buf1)));
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assert(buf.str().empty());
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assert(buf1.str().empty());
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buf.check_different_pointers(buf1);
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}
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// Use the constructor from an actual std::stringbuf, not test_stringbuf
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{
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StringBuf buf1(s);
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StringBuf buf(std::move(buf1));
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assert(buf.str() == s);
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assert(buf1.str().empty());
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}
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}
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}
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int main(int, char**) {
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test<char>();
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#ifndef TEST_HAS_NO_WIDE_CHARACTERS
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test<wchar_t>();
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#endif
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return 0;
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}
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