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[Caml-list] Syntax for multiple subtyping constraints?
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Date: 2002-07-12 (13:21)
From: John Max Skaller <skaller@o...>
Subject: Re: [Caml-list] Syntax for multiple subtyping constraints?
Brian Smith wrote:

> In other words, how can I assert that (some_z : z :> x) and (some_z : 
> z :> y) will always be valid? 

Well, you can just encode the conversion in a function:

let x_of_z (some_z : z):x = (some_z:z::>x)

John Max Skaller,
snail:10/1 Toxteth Rd, Glebe, NSW 2037, Australia.

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