ostrstream and memory leak

[tcl]

Questions on ostrstream.


#1) do I have a memory leak as the control exits the scope
{
ostrstream os;
os << "hello world" << endl << ends;
}


#2) if there's no memory leak in #1, is there a leak here:
{
ostrstream os;
os << "hello world" << endl << ends;
cout << os.str();
}


#3) if there's a memory leak in either #1 or #2, would adding
either of the following statements right before exiting
the scope fix it? if not, how to fix it?
os.freeze(0);
delete [] os;

Thanks,
tcl

 

[John Harrison]

Questions on ostrstream.


#1) do I have a memory leak as the control exits the scope
{
ostrstream os;
os << "hello world" << endl << ends;
}
No.


#2) if there's no memory leak in #1, is there a leak here:
{
ostrstream os;
os << "hello world" << endl << ends;
cout << os.str();
}

Unfortunately yes because ostrstream is very badly designed.

#3) if there's a memory leak in either #1 or #2, would adding
either of the following statements right before exiting
the scope fix it? if not, how to fix it?
os.freeze(0);

I think the above is OK but consult your documentation.

delete [] os;

The above is an error, probably shouldn't even compile.

Better still use ostringstream, then you don't need to worry about any
of this nonsense.

john