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[Caml-list] Matching when
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Date: -- (:)
From: John Max Skaller <skaller@o...>
Subject: Re: [Caml-list] Matching when
Nicolas Cannasse wrote:

>Hi !
>
>I was thinking that the following should be possible :
>
>match e with
>| Any
>| Int x when x > 0 ->
>        .... (* here we don't use x *)
>| ....
>
>But the typechecker reject it because of the unbound 'x' in the "Any"
>matching.
>
Hmm. to rewrite it so it works:

    | Int _ when (match e with Int x -> x > 0 | _ -> assert false) -> ...

:-)


-- 
John Max Skaller, mailto:skaller@ozemail.com.au
snail:10/1 Toxteth Rd, Glebe, NSW 2037, Australia.
voice:61-2-9660-0850




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