256813f4e7
git-svn-id: https://llvm.org/svn/llvm-project/libcxx/trunk@111758 91177308-0d34-0410-b5e6-96231b3b80d8
55 lines
1.6 KiB
C++
55 lines
1.6 KiB
C++
//===----------------------------------------------------------------------===//
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//
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// The LLVM Compiler Infrastructure
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//
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// This file is distributed under the University of Illinois Open Source
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// License. See LICENSE.TXT for details.
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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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// template <class charT, class traits>
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// void
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// swap(basic_filebuf<charT, traits>& x, basic_filebuf<charT, traits>& y);
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#include <fstream>
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#include <cassert>
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int main()
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{
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{
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std::filebuf f;
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assert(f.open("test.dat", 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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swap(f2, 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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remove("test.dat");
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{
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std::wfilebuf f;
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assert(f.open("test.dat", 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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swap(f2, 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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remove("test.dat");
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}
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