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//===----------------------------------------------------------------------===//
//
// The LLVM Compiler Infrastructure
//
// This file is distributed under the University of Illinois Open Source
// License. See LICENSE.TXT for details.
//
//===----------------------------------------------------------------------===//
// <fstream>
// template <class charT, class traits = char_traits<charT> >
// class basic_fstream
// template <class charT, class traits>
// void swap(basic_fstream<charT, traits>& x, basic_fstream<charT, traits>& y);
#include <fstream>
#include <cassert>
int main()
{
{
std::fstream fs1("test1.dat", std::ios_base::in | std::ios_base::out
| std::ios_base::trunc);
std::fstream fs2("test2.dat", std::ios_base::in | std::ios_base::out
| std::ios_base::trunc);
fs1 << 1 << ' ' << 2;
fs2 << 2 << ' ' << 1;
fs1.seekg(0);
swap(fs1, fs2);
fs1.seekg(0);
int i;
fs1 >> i;
assert(i == 2);
fs1 >> i;
assert(i == 1);
i = 0;
fs2 >> i;
assert(i == 1);
fs2 >> i;
assert(i == 2);
}
std::remove("test1.dat");
std::remove("test2.dat");
{
std::wfstream fs1("test1.dat", std::ios_base::in | std::ios_base::out
| std::ios_base::trunc);
std::wfstream fs2("test2.dat", std::ios_base::in | std::ios_base::out
| std::ios_base::trunc);
fs1 << 1 << ' ' << 2;
fs2 << 2 << ' ' << 1;
fs1.seekg(0);
swap(fs1, fs2);
fs1.seekg(0);
int i;
fs1 >> i;
assert(i == 2);
fs1 >> i;
assert(i == 1);
i = 0;
fs2 >> i;
assert(i == 1);
fs2 >> i;
assert(i == 2);
}
std::remove("test1.dat");
std::remove("test2.dat");
}
|
