From: utzoo!decvax!harpo!eagle!mhuxt!mhuxj!cbosgd!mark
Newsgroups: net.unix-wizards
Title: Re: C comments
Article-I.D.: cbosgd.2807
Posted: Fri Nov 12 14:01:22 1982
Received: Mon Nov 15 06:00:36 1982
Reply-To: mark@cbosgd.UUCP (Mark Horton)
References: sri-unix.3985

If you want to comment out a large chunk of code which contains comments, do
	#ifdef notdef
		code to be commented out
	#endif
The idea is that "notdef" will never be defined.  Similarly, when you have
a new way to do something and don't want to throw away the old way yet,
	#ifndef notdef
		new way
	#else
		old way
	#endif
SCCS can be used for the same thing, but if you intend the change to
be quick and the old way taken out as soon as you trust the new way,
this method is handy.

Since #ifdef's nest, this can be used even when the code uses the
preprocessor.