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Date: Mon, 22 Jul 2013 16:23:37 +0200
From: oliver <oliver@first.in-berlin.de>
To: David Allsopp <dra-news@metastack.com>
Cc: "caml-list@inria.fr" <caml-list@inria.fr>
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Subject: Re: [Caml-list] Re: functional or imperative feature ?

On Mon, Jul 22, 2013 at 11:46:55AM +0000, David Allsopp wrote:
> oliver wrote:
> > Maybe it can be called just syntactical sugar...
> 
> Yes...
> 
> > ========================================================================
> > 
> > let fun_a () = print_endline "A: FooBar";
> >                print_endline "A: Baz"
> > 
> > let fun_b () =
> >                let () = print_endline "B: FooBar" in
> >                let () = print_endline "B: Baz" in
> >                ()
> 
> ... but not for this translation! Consider
> 
> # 4; 3;;
> Characters 0-1:
>   4; 3;;
>   ^
> Warning 10: this expression should have type unit.
> - : int = 3
> 
> By your translation, you'd have:
> 
> # let () = 4 in
>   3;;
> Characters 9-10:
>   let () = 4 in
>            ^


let _ = 4 in _ = 4 in ();;

The unit-problem comes from let () = ...
                                ^^ 
                                  \
                                 unit


Ciao,
   Oliver