forked from OSchip/llvm-project
72 lines
2.0 KiB
C++
72 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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// void swap(basic_fstream& rhs);
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#include <fstream>
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#include <cassert>
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#include "platform_support.h"
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int main()
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{
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std::string temp1 = get_temp_file_name();
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std::string temp2 = get_temp_file_name();
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{
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std::fstream fs1(temp1.c_str(), std::ios_base::in | std::ios_base::out
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| std::ios_base::trunc);
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std::fstream fs2(temp2.c_str(), 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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fs1.swap(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(temp1.c_str());
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std::remove(temp2.c_str());
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{
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std::wfstream fs1(temp1.c_str(), std::ios_base::in | std::ios_base::out
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| std::ios_base::trunc);
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std::wfstream fs2(temp2.c_str(), 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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fs1.swap(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(temp1.c_str());
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std::remove(temp2.c_str());
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}
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