Path: utzoo!attcan!uunet!seas.gwu.edu!jeff
From: jeff@seas.gwu.edu (Jeff Schilling)
Newsgroups: comp.lang.c++
Subject: Resolving function pointer type mismatch ?
Message-ID: <1686@sparko.gwu.edu>
Date: 22 Mar 90 15:18:58 GMT
Reply-To: jeff@seas.gwu.edu (Jeff Schilling)
Distribution: na
Organization: The George Washington University, Washington D.C.
Lines: 45

Howdy, I have a class defined with a member that is a function pointer,
like this:

class foo {
	int (*keytest)(void *,void *)
	.
	.
public:
	foo();
};

The idea is to have a pointer to a comparison function a la [str,mem]cmp
to perform a comparison.

The problem:  I am using Zortech C++ 2.0 and in my constructor, I say

foo() { keytest = &strcmp; }

The compiler complains with a message of 

ZTCPP1 -oc:temp.tmp idxcoll
	keyTest = &strcmp;
	                 ^
"idxcoll.cpp", line 13 Syntax error: type mismatch
Had: <near *><near C++ func(<near *><void>,<near *><void>) returning><int>
and: <near *><near C func(<near *><char>,<near *><char>) returning><int>
 
--- errorlevel 1

My question is, is the compiler complaining about the C++ versus C function
type, or the arguments?  

The Zortech reference manual states that "both the arguments and return 
type must exactly match those of the function pointer _EXACTLY_"

So, what will it be?  Thanx in advance.

jeff
+---------------------------------------------------------------------------+
| Jeff Schilling            School of Engineering Computing Facility        |
| jeff@seas.gwu.edu              George Washington University               |
| uunet!gwusun!jeff                   Washington, DC  20009	            |
| (201) 994-6853                                                            |
| System Programmer							    |
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