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57 lines
1.7 KiB
C++
57 lines
1.7 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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// <fstream>
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// template <class charT, class traits = char_traits<charT> >
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// class basic_filebuf
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// void swap(basic_filebuf& rhs);
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#include <fstream>
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#include <cassert>
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#include "test_macros.h"
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#include "platform_support.h"
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int main(int, char**)
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{
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std::string temp = get_temp_file_name();
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{
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std::filebuf f;
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assert(f.open(temp.c_str(), std::ios_base::out | std::ios_base::in
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| std::ios_base::trunc) != 0);
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assert(f.is_open());
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assert(f.sputn("123", 3) == 3);
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f.pubseekoff(1, std::ios_base::beg);
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assert(f.sgetc() == '2');
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std::filebuf f2;
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f2.swap(f);
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assert(!f.is_open());
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assert(f2.is_open());
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assert(f2.sgetc() == '2');
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}
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std::remove(temp.c_str());
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{
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std::wfilebuf f;
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assert(f.open(temp.c_str(), std::ios_base::out | std::ios_base::in
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| std::ios_base::trunc) != 0);
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assert(f.is_open());
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assert(f.sputn(L"123", 3) == 3);
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f.pubseekoff(1, std::ios_base::beg);
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assert(f.sgetc() == L'2');
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std::wfilebuf f2;
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f2.swap(f);
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assert(!f.is_open());
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assert(f2.is_open());
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assert(f2.sgetc() == L'2');
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}
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std::remove(temp.c_str());
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return 0;
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}
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