Newsgroups:	comp.os.msdos.djgpp
From:	wolfman AT cedar DOT alberni DOT net
Subject:	template function pointers
Message-ID:	<a177cd$1418c.186@news.alberni.net>
Date:	Fri, 24 Oct 1997 04:24:12 GMT
Lines:	16
To:	djgpp AT delorie DOT com
DJ-Gateway:	from newsgroup comp.os.msdos.djgpp

Hello, I am doing a bit of coding in djgpp and along the way, I wanted to write some 
pixel plotting code using function pointers and templates.  The reasons being that 
with templates there are about 8 pixel plotting functions (this would almost double 
without templates), and I want the user to simply write: Plot_Pixel(x, y, color); in 
order to access any of the plotting functions in any mode (the mode setting function 
assignes the proper function to Plot_Pixel()).  Anyway, this is what I have in the 
header.


template<class col>
extern void (*Plot_Pixel)(short x, short y, col color).


And for some reason, DJGPP tells me on this line that 'Plot_Pixel must be a class 
member' or something along those lines.  Can someone help me pleas.

- Raw text -