70 lines
2.0 KiB
C++
70 lines
2.0 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 dual licensed under the MIT and the University of Illinois Open
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// Source Licenses. 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_fstream
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// template <class charT, class traits>
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// void swap(basic_fstream<charT, traits>& x, basic_fstream<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::fstream fs1("test1.dat", std::ios_base::in | std::ios_base::out
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| std::ios_base::trunc);
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std::fstream fs2("test2.dat", std::ios_base::in | std::ios_base::out
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| std::ios_base::trunc);
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fs1 << 1 << ' ' << 2;
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fs2 << 2 << ' ' << 1;
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fs1.seekg(0);
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swap(fs1, fs2);
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fs1.seekg(0);
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int i;
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fs1 >> i;
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assert(i == 2);
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fs1 >> i;
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assert(i == 1);
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i = 0;
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fs2 >> i;
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assert(i == 1);
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fs2 >> i;
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assert(i == 2);
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}
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std::remove("test1.dat");
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std::remove("test2.dat");
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{
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std::wfstream fs1("test1.dat", std::ios_base::in | std::ios_base::out
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| std::ios_base::trunc);
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std::wfstream fs2("test2.dat", std::ios_base::in | std::ios_base::out
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| std::ios_base::trunc);
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fs1 << 1 << ' ' << 2;
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fs2 << 2 << ' ' << 1;
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fs1.seekg(0);
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swap(fs1, fs2);
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fs1.seekg(0);
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int i;
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fs1 >> i;
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assert(i == 2);
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fs1 >> i;
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assert(i == 1);
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i = 0;
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fs2 >> i;
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assert(i == 1);
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fs2 >> i;
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assert(i == 2);
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}
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std::remove("test1.dat");
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std::remove("test2.dat");
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}
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