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//===----------------------------------------------------------------------===//
//
// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
// See https://llvm.org/LICENSE.txt for license information.
// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
//
//===----------------------------------------------------------------------===//
// <fstream>
// template <class charT, class traits = char_traits<charT> >
// class basic_ifstream
// void open(const string& s, ios_base::openmode mode = ios_base::in);
#include <fstream>
#include <cassert>
int main()
{
{
std::ifstream fs;
assert(!fs.is_open());
char c = 'a';
fs >> c;
assert(fs.fail());
assert(c == 'a');
fs.open(std::string("test.dat"));
assert(fs.is_open());
fs >> c;
assert(c == 'r');
}
{
std::wifstream fs;
assert(!fs.is_open());
wchar_t c = L'a';
fs >> c;
assert(fs.fail());
assert(c == L'a');
fs.open(std::string("test.dat"));
assert(fs.is_open());
fs >> c;
assert(c == L'r');
}
}
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