open_pointer.pass.cpp [plain text]
#include <fstream>
#include <cassert>
int main()
{
char temp[L_tmpnam];
tmpnam(temp);
{
std::ofstream fs;
assert(!fs.is_open());
char c = 'a';
fs << c;
assert(fs.fail());
fs.open(temp);
assert(fs.is_open());
fs << c;
}
{
std::ifstream fs(temp);
char c = 0;
fs >> c;
assert(c == 'a');
}
remove(temp);
{
std::wofstream fs;
assert(!fs.is_open());
wchar_t c = L'a';
fs << c;
assert(fs.fail());
fs.open(temp);
assert(fs.is_open());
fs << c;
}
{
std::wifstream fs(temp);
wchar_t c = 0;
fs >> c;
assert(c == L'a');
}
remove(temp);
}