open_path.pass.cpp (1151B)
1 //===----------------------------------------------------------------------===// 2 // 3 // The LLVM Compiler Infrastructure 4 // 5 // This file is dual licensed under the MIT and the University of Illinois Open 6 // Source Licenses. See LICENSE.TXT for details. 7 // 8 //===----------------------------------------------------------------------===// 9 10 // UNSUPPORTED: c++98, c++03, c++11, c++14 11 12 // <fstream> 13 14 // template <class charT, class traits = char_traits<charT> > 15 // class basic_ifstream 16 17 // void open(const filesystem::path& s, ios_base::openmode mode = ios_base::in); 18 19 #include <fstream> 20 #include <filesystem> 21 #include <cassert> 22 23 int main() { 24 { 25 std::ifstream fs; 26 assert(!fs.is_open()); 27 char c = 'a'; 28 fs >> c; 29 assert(fs.fail()); 30 assert(c == 'a'); 31 fs.open(std::filesystem::path("test.dat")); 32 assert(fs.is_open()); 33 fs >> c; 34 assert(c == 'r'); 35 } 36 { 37 std::wifstream fs; 38 assert(!fs.is_open()); 39 wchar_t c = L'a'; 40 fs >> c; 41 assert(fs.fail()); 42 assert(c == L'a'); 43 fs.open(std::filesystem::path("test.dat")); 44 assert(fs.is_open()); 45 fs >> c; 46 assert(c == L'r'); 47 } 48 }