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libcxx/test/std/input.output/file.streams/fstreams/ifstream.assign/member_swap.pass.cpp

43 lines
1000 B
C++

//===----------------------------------------------------------------------===//
//
// The LLVM Compiler Infrastructure
//
// This file is dual licensed under the MIT and the University of Illinois Open
// Source Licenses. See LICENSE.TXT for details.
//
//===----------------------------------------------------------------------===//
// <fstream>
// template <class charT, class traits = char_traits<charT> >
// class basic_ifstream
// void swap(basic_ifstream& rhs);
#include <fstream>
#include <cassert>
int main()
{
{
std::ifstream fs1("test.dat");
std::ifstream fs2("test2.dat");
fs1.swap(fs2);
double x = 0;
fs1 >> x;
assert(x == 4.5);
fs2 >> x;
assert(x == 3.25);
}
{
std::wifstream fs1("test.dat");
std::wifstream fs2("test2.dat");
fs1.swap(fs2);
double x = 0;
fs1 >> x;
assert(x == 4.5);
fs2 >> x;
assert(x == 3.25);
}
}