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From: "Randy Brukardt" <randy@rrsoftware.com>
Newsgroups: comp.lang.ada
Subject: Re: Callback in Ada
Date: Tue, 4 Jan 2011 14:15:43 -0600
Organization: Jacob Sparre Andersen
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Date: 2011-01-04T14:15:43-06:00
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"Alex Mentis" <foo@invalid.invalid> wrote in message 
news:ifvp6h$qga$1@news.eternal-september.org...
...
> In other words, from what I read, it looks like once this is supported
> one could have a function Foobar in an .ads file that looks like
>
> function Foobar (A : Integer) return Integer is (if A > 10 then A - 5
> else A);
>
> and not need a corresponding function in the .adb file.

Right.

An alternative way of looking at this feature is that it provides a way to 
give a name to an expression. (This is modeled as a function because it is 
the least disruptive way to do that; the original idea was to call this a 
"renaming" of an expression.) The "body" in this case is just the expression 
being named.

                         Randy.