Re: outcommented fdopen code

On Sat, 12 Jun 1999, Jim Winstead wrote: > On Jun 12, Zeev Suraski wrote: > > On Sat, 12 Jun 1999, Sascha Schumann wrote: > > I'm wondering what to do about it myself, since I want to support > > include_path and URLs in the C++ version as well (currently it doesn't > > work, since I need to create an istream * pointer, and there's no way to > > convert a FILE * to an istream *). > > Well, you could simply derive your own FILEistream or somesuch. > It's not very fun, but not incredibly difficult. We had to do > something similar on the last project I worked on. I wanted to do it. Would it work though? None of the functions in class istream are virtual. Miraculously, and I'm not really sure how, istrstream and ifstream don't seem to override any istream functions, just add a bit to them, which is why sending ifstream and istrstream pointers to flex works. I can't see how flex would work with my own derived class that would obviously have to override the various IO functions of istream. Since the methods aren't virtual, and since the pointer is always of type istream *, it won't call my methods anyway... Or am I missing something? If I can derive a class from ifstream * it's trivial to write a small wrapper class that will relay all of the methods flex calls to a FILE * member, but I want to be sure it will be calling these functions, and not istream's functions. Zeev -- ----------------------------------------------------- Zeev Suraski <zeev@zend.com> For a PGP public key, finger bourbon@netvision.net.il