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Date: Tue, 31 Jul 2001 12:16:42 +0100
From: Philip Anderson <phil.anderson@amsjv.com>
Organization: Alenia Marconi Systems ISD
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Newsgroups: comp.lang.ada
Subject: Re: How to make Ada a dominant language
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Date: 2001-07-31T12:16:42+01:00
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Keith Thompson wrote:
> 
> 18k11tm001@sneakemail.com (Russ) writes:
<snip>
> > 4. Use "=" instead of "=>" for passing arguments by named association,
> > as in Python.
> 
> "Proc(Foo = Bar)" is already a valid Ada procedure call; it passes the
> value True if Foo and Bar are equal, False if they aren't.

But Russ would replace that with "Proc(Foo == Bar)", so no ambiguity :-)


Consider the following (in NewAda, Ada in comments):

Integer : Foo  -- Foo : Integer;
Integer : Bar  -- Bar : Integer;

procedure Proc (Integer in : Foo)
-- procedure Proc (Foo : in Integer);

procedure Proc (Boolean in : A)
-- procedure Proc (A : in Boolean);


Proc (Foo = Bar)   -- Proc (Foo => Bar);
Proc (Foo == Bar)  -- Proc (Foo = Bar);
Proc (Foo >= Bar)  -- Proc (Foo >= Bar);


"Proc(Foo = Bar)" would certainly confuse existing Ada programmers, but
Ada is potentially confusing too.  I'd always write something like "Proc
(A => (Foo = Bar))" to show that the "Foo = Bar" is an expression


-- 
hwyl/cheers,
Philip Anderson
Alenia Marconi Systems
Cwmbr�n, Cymru/Wales