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[Caml-list] Polymorphism and the "for" loop
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Date: 2004-10-21 (19:42)
From: Ville-Pertti Keinonen <will@e...>
Subject: Re: [Caml-list] Polymorphism and the "for" loop
Jon Harrop wrote:

>I see. Does this stem from historical reasons or is there a logical reason why 
>this should be a warning rather than an error?
Good question.  Personally, I probably would've made it an error.

>Yes, whereas the current approach can "fail" silently:
># f (fun () -> 1);;
>- : unit = ()
That's not a failure, just a lack of a warning, since the type system 
lacks the ability to propagate the "<warning-if-not-unit>" property that 
I suggested.

Compared to compilers for other languages, OCaml seems to me fairly easy 
to understand in its warnings/lack-thereof.  I've run into quite a bit 
of C++ code, compiled using GCC, that generates (unjustified) warnings 
about potentially uninitialized variables on some architectures 
(PA-RISC/HP-UX) but not others...

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