From: Sven LUTHER <luther@dpt-info.u-strasbg.fr>
To: Oliver Bandel <oliver@first.in-berlin.de>
Cc: Dimitri Ara <dimitri@nerim.net>, caml-list@inria.fr
Subject: Re: [Caml-list] Calling a function with a self-defined type as argument
Date: Thu, 22 Aug 2002 15:13:13 +0200 [thread overview]
Message-ID: <20020822131313.GA14497@iliana> (raw)
In-Reply-To: <Pine.LNX.3.95.1020822144407.635B-100000@first.in-berlin.de>
On Thu, Aug 22, 2002 at 02:47:26PM +0200, Oliver Bandel wrote:
>
> On 22 Aug 2002, Dimitri Ara wrote:
>
> > Oliver Bandel <oliver@first.in-berlin.de> a écrit :
> >
> > > (*
> > > let _ = x Line "h0oifdaji oi" ;;
> > > This last one does not work: => "This function is applied to too many arguments"
> > >
> > > let _ = x Line( "reuruhjf" ) ;;
> > > This last one does not work: => "This function is applied to too many arguments"
> > >
> > > But it works in this way:
> > > let _ = x (Line "reuruhjf") ;;
> > >
> > > WHY? (why *only* that?)
> > >
> > > At least the second example (with parantheses around the
> > > Line's arguments) should work...?!
> > > *)
> >
> > Because :
> >
> > (1) application is left associative.
> >
> > Thus `f x y' means `(f x) y' and
> > `x Line ""' means `(x Line) ""'.
> >
> > (2) parentheses don't delimit the arguments of a function or a
> > constructor but only fix the precedence of an expression.
> >
> > Thus f x (y) means f x y and
> > `x Line ("")' means `x Line ""'.
>
> OK.
> But why has the Line()-argument not a higher pruiority than the
> function-call?
> The Line()-argument is only complete, if it get's it's
> args. And the type-declaration says in detail, how to
> handle the Line().
No, in ocaml, the function application is the space ' ', so what you are
used to write "f(x)", is just plain "f x", and you can add a few ( to
make unambigous, as in your case : (f x).
It seems confusing if you are not used to it, but makes for more clearer code.
Friendly,
Sven Luther
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next prev parent reply other threads:[~2002-08-22 13:59 UTC|newest]
Thread overview: 14+ messages / expand[flat|nested] mbox.gz Atom feed top
2002-08-22 1:11 Oliver Bandel
2002-08-22 1:43 ` SooHyoung Oh
2002-08-22 1:50 ` Oleg
2002-08-22 2:20 ` Pal-Kristian Engstad
2002-08-22 2:32 ` Dimitri Ara
2002-08-22 12:40 ` Oliver Bandel
2002-08-22 13:15 ` Markus Mottl
2002-08-22 20:40 ` Oliver Bandel
2002-08-22 2:04 ` Dimitri Ara
2002-08-22 12:47 ` Oliver Bandel
2002-08-22 13:13 ` Sven LUTHER [this message]
2002-08-22 14:07 ` Remi VANICAT
2002-08-22 14:15 ` Markus Mottl
2002-08-22 23:51 ` Pixel
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