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Typing of the sequence operator (;)
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Date: 2005-11-12 (04:11)
From: skaller <skaller@u...>
Subject: Re: [Caml-list] Typing of the sequence operator (;)
On Fri, 2005-11-11 at 20:33 +0100, Lukasz Stafiniak wrote:
> Dear list,
> Why does the sequence operator (;) have type 'a -> 'b -> 'b and not
> unit -> 'a -> 'a? There is (ignore) for doing "these things"
> purposefully. The toplevel warning is very often mute. Together with
> labels, this is a source of bugs.

Yes, I actually think this should be made a hard error.
In transition, a compiler flag to let it pass.

The only place I can see where you might want to 'drop'
a returned value is when interfacing the external world.

John Skaller <skaller at users dot sf dot net>
Felix, successor to C++: http://felix.sf.net