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From: "Dmitry A. Kazakov" <mailbox@dmitry-kazakov.de>
Subject: Re: Callback in Ada
Newsgroups: comp.lang.ada
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Date: Mon, 29 Nov 2010 09:41:03 +0100
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Date: 2010-11-29T09:41:03+01:00
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On Sun, 28 Nov 2010 13:35:12 -0800 (PST), Maciej Sobczak wrote:

> On 27 Lis, 22:20, "Dmitry A. Kazakov" <mail...@dmitry-kazakov.de>
> wrote:
> 
>> we would be able to write:
>>
>> � �procedure Foo (Closure : procedure (I : Integer));
>> � �procedure Bar (I : Integer);
>> � �...
>> � �Foo (Bar);
> 
> And now an equivalent example with functions, please. :-)

 � �procedure Foo (Closure : function return Integer);
 � �function Bar return Integer;
 � �...
 � �Foo (Bar);

There is no difference.

You probably think that there might be a problem in resolving Bar in Foo,
because Bar could mean a call to Bar. But this is no problem in Ada [*].
Foo expects a function argument, it does not expect Integer.

---------------
* Ada is not bottom up as C++, it can resolve using the type of the result.

-- 
Regards,
Dmitry A. Kazakov
http://www.dmitry-kazakov.de