[mercury-users] undefined symbol `::/2'.

[Fergus Henderson]

On 23-Jul-2001, Richard A. O'Keefe <ok at atlas.otago.ac.nz> wrote:
> "Matthews, John" <John.Matthews at compaq.com> wrote:
> 	:- pred between(int,int,int).
> 	:- mode between(in,in,in) is semidet.
> 	:- mode between(in,out,in) is multi.
> 	
> As the original inventor of between/3, I should point out 
> that the standard interface for between/3 in Prolog is
> 
> 	between(Lower_Bound, Upper_Bound, I)
> 
> Amongst other things, this meant that between(0,N) could be passed
> around usefully as a closure in Prolog.  While that advantage does
> not apply to Mercury,

Why not?

> there doesn't seem to be any advantage to be
> gained by changing the argument order.

-- 
Fergus Henderson <fjh at cs.mu.oz.au>  |  "I have always known that the pursuit
The University of Melbourne         |  of excellence is a lethal habit"
WWW: <http://www.cs.mu.oz.au/~fjh>  |     -- the last words of T. S. Garp.
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