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From: "Martin Dowie" <martin.dowie@nospam.baesystems.com>
Newsgroups: comp.lang.ada
References: <2vRa8.11975$kt5.28657@rwcrnsc52.ops.asp.att.net>
Subject: Re: Operator question.
Date: Thu, 14 Feb 2002 16:55:07 -0000
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"Wannabe h4x0r" <chris@dont.spam.me> wrote in message
news:2vRa8.11975$kt5.28657@rwcrnsc52.ops.asp.att.net...
> Alright, forgive me if this question seems dumb. I cant beleive I havent
> asked it before now.(or maybe I have and I just forgot.)
>
> What does the operator '=>' mean? I've been looking through my book
> "Programming in Ada95" but I cant seem to find it anywhere.
>
> I see it everywhere in Ada code. Maybe I'm just a slow learner.

Me too ;-)

'=>' is use in a number of places, but really just to get a nice
readable syntax - it has no hidden value itself:

1. In named association e.g. the procedure call:
    Foo (Value => Bar);

   'Value' is the 'formal parameter name', 'Bar' is the 'actual parameter'

2. In case statements:
   case Value is
      when Foo =>
         ...
   end case;

3. In array assignment:
   Value : Array_Type := (1 .. 10 => 0);

4. In exception handlers:
   begin
      ...
   exception
      when My_Exception =>
         ...
   end;

There are probably others which I can't think of off the top of my
head.

Hope this helps.