open_pointer.pass.cpp revision 06d8bf6ce2008526732ae40ad46f7ff031c409e7 
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// <fstream>
11
12// template <class charT, class traits = char_traits<charT> >
13// class basic_fstream
14
15// void open(const char* s, ios_base::openmode mode = ios_base::in|ios_base::out);
16
17#include <fstream>
18#include <cassert>
19#include "platform_support.h"
20
21int main()
22{
23    std::string temp = get_temp_file_name();
24    {
25        std::fstream fs;
26        assert(!fs.is_open());
27        fs.open(temp.c_str(), std::ios_base::in | std::ios_base::out
28                                        | std::ios_base::trunc);
29        assert(fs.is_open());
30        double x = 0;
31        fs << 3.25;
32        fs.seekg(0);
33        fs >> x;
34        assert(x == 3.25);
35    }
36    std::remove(temp.c_str());
37    {
38        std::wfstream fs;
39        assert(!fs.is_open());
40        fs.open(temp.c_str(), std::ios_base::in | std::ios_base::out
41                                        | std::ios_base::trunc);
42        assert(fs.is_open());
43        double x = 0;
44        fs << 3.25;
45        fs.seekg(0);
46        fs >> x;
47        assert(x == 3.25);
48    }
49    std::remove(temp.c_str());
50}
51