Re: [Caml-list] Comparison of functional values

[Arturo Borquez <aborquez@altavista.com>]

On Tue, 06 March 2001, Olivier Andrieu wrote:

> 
> 
> Hello list, 
> 
> I wanted to build a Set of functional value. But generic equality
> can't be used for functional values (raises an exception ...). It is
> therefore difficult to build a Set of such values because the Set.Make
> functor requires a comparison function and Pervasives.compare relies
> on (=).
> 
> Is there a way around this ? I thought I could use physical equality
> (wich is OK wrt functional values) but there's no such thing as
> `physical inequality'.
> 
> -- 
> Olivier Andrieu
> -------------------
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Hi Olivier:
Perhaps this help

let a = fun f x -> x = x;;
let b = fun f x -> x = x;;
(a == b) = true;;
-: bool = false
not (a == b) = true;;
-: bool = true

Regards
Arturo Borquez


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