Path: utzoo!utgpu!news-server.csri.toronto.edu!cs.utexas.edu!tut.cis.ohio-state.edu!att!bellcore!shera!garnett
From: garnett@shera..bellcore.com (Michael Garnett)
Newsgroups: comp.lang.c++
Subject: Re: Pointers to member functions
Keywords: pointer, function, member, class
Message-ID: <1991Jan21.083930.2541@bellcore.bellcore.com>
Date: 21 Jan 91 08:39:30 GMT
References: <1991Jan18.222713.26249@scrumpy@.bnr.ca>
Sender: usenet@bellcore.bellcore.com (Poster of News)
Reply-To: garnett@shera.UUCP (Michael Garnett)
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Organization: Bellcore MRE
Lines: 13

In article <1991Jan18.222713.26249@scrumpy@.bnr.ca> bnrmtl!stu4@larry.mcrcim.mcgill.edu writes:
>I am trying to pass a pointer of a function (that is a member of a 
>class) to the ftw() function (taken from <ftw.h>).
>
	You can't pass a member function to ftw to call.  ftw does not know
	about your class, and cannot thus provide the "this" paramater. Methods
	must be called ON an object, ftw has no such object to call your function 
	on.
	A pointer to the member function showfile of fileclass is of type:
	int (fileclass::*)(const char*, stat*, int);
	This is not the same as regular pointers to functions.

Michael