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From: ark@rabbit.UUCP
Newsgroups: net.unix
Subject: Re: functions returning pionters to functions
Message-ID: <2277@rabbit.UUCP>
Date: Wed, 14-Dec-83 10:01:54 EST
Article-I.D.: rabbit.2277
Posted: Wed Dec 14 10:01:54 1983
Date-Received: Fri, 16-Dec-83 01:44:31 EST
References: <2430@azure.UUCP>
Organization: AT&T Bell Laboratories, Murray Hill
Lines: 25

Suppose I want to write a function f that returns a pointer to a
function returning an integer.  I first think about how I'm going to
invoke it.

	f(x)

is going to be a pointer to a function, so

	*f(x)

will be this function itself.  Well, since * binds less tightly than
function calls, I must invoke the (secondary) function by saying

	(*f(x))()

and this expression is now an integer.   If I want to write f, I therefore
say:

	inf (*f(x))()
		int x;
	{
		...
	}

Works like a charm.