| //===----------------------------------------------------------------------===// |
| // |
| // 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 char* s, ios_base::openmode mode = ios_base::in); |
| |
| #include <fstream> |
| #include <cassert> |
| |
| #include "test_macros.h" |
| |
| int main(int, char**) |
| { |
| { |
| std::ifstream fs; |
| assert(!fs.is_open()); |
| char c = 'a'; |
| fs >> c; |
| assert(fs.fail()); |
| assert(c == 'a'); |
| fs.open("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("test.dat"); |
| assert(fs.is_open()); |
| fs >> c; |
| assert(c == L'r'); |
| } |
| |
| return 0; |
| } |