is it a bug in gcc2.3.2?

[gukn9700]

the following code cannot pass the compiler:

#include <fstream>
#include <iostream>

using namespace std;

int main()
{
fstream outfile("i:\\test.txt", ios_base::in | ios_base::out);
long lFlag = outfile.flags();

outfile.setf(ios_base::app);
cout << hex << "Original flag : " << lFlag << '\n'
<< "Now flag : " << outfile.flags() << '\n';

if (outfile.flags() & ios_base::app)
cout << "append bit set!\n";

char ch;
while (cin >> ch)
outfile << ch;

cout << '\n';
outfile.seekg(0);
while (outfile.get(ch))
cout << ch;
cout << '\n';

return 0;
}

the compiler returns the errors:

test3.cpp: In function `int main()':
test3.cpp:11: no matching function for call to
`std::basic_fstream<char,
std::char_traits<char> >::setf(const std::_Ios_Openmode&)'
i:/mingw/include/c++/3.2/bits/ios_base.h:342: candidates are:
std::_Ios_Fmtflags std::ios_base::setf(std::_Ios_Fmtflags)
i:/mingw/include/c++/3.2/bits/ios_base.h:350:
std::_Ios_Fmtflags std::ios_base::setf(std::_Ios_Fmtflags,
std::_Ios_Fmtflags)

but there is no problem with both bcc5.5 and vc6.0.

my system is Windows2000 and i use the gcc2.3.2 shipped with
mingw2.0.3.

what's the matter with gcc2.3.2 or my program?

[John Harrison]

"gukn9700" <gu******@hotmail.com> wrote in message
news:5g********************************@4ax.com...

the following code cannot pass the compiler:

#include <fstream>
#include <iostream>

using namespace std;

int main()
{
fstream outfile("i:\\test.txt", ios_base::in | ios_base::out);
long lFlag = outfile.flags();

outfile.setf(ios_base::app);
cout << hex << "Original flag : " << lFlag << '\n'
<< "Now flag : " << outfile.flags() << '\n';

if (outfile.flags() & ios_base::app)
cout << "append bit set!\n";

char ch;
while (cin >> ch)
outfile << ch;

cout << '\n';
outfile.seekg(0);
while (outfile.get(ch))
cout << ch;
cout << '\n';

return 0;
}

the compiler returns the errors:

test3.cpp: In function `int main()':
test3.cpp:11: no matching function for call to
`std::basic_fstream<char,
std::char_traits<char> >::setf(const std::_Ios_Openmode&)'
i:/mingw/include/c++/3.2/bits/ios_base.h:342: candidates are:
std::_Ios_Fmtflags std::ios_base::setf(std::_Ios_Fmtflags)
i:/mingw/include/c++/3.2/bits/ios_base.h:350:
std::_Ios_Fmtflags std::ios_base::setf(std::_Ios_Fmtflags,
std::_Ios_Fmtflags)

but there is no problem with both bcc5.5 and vc6.0.

my system is Windows2000 and i use the gcc2.3.2 shipped with
mingw2.0.3.

what's the matter with gcc2.3.2 or my program?

Your program of course. setf is for format flags, ios_base::app is an open
mode flag. Probably those other compilers defined format flags and open mode
flags as both being type long, so they could not detect this error. gcc is
superior (in this respect at least).

john