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[Caml-list] Syntax for multiple subtyping constraints?

Brian Smith
- Jacques Garrigue
- John Max Skaller

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




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