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From: lutz@iks-jena.de (Lutz Donnerhacke)
Newsgroups: comp.lang.ada
Subject: Re: Ada.Streams.Read Length Paramenter is not IN?
Date: Tue, 7 Aug 2001 20:18:18 +0000 (UTC)
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* Ted Dennison wrote:
>In article <slrn9mvbej.hs.lutz@taranis.iks-jena.de>, Lutz Donnerhacke says...
>>OTOH each T'Read or T'Input procedure exactly knows how many
>>Storage_Elements are needed to fullfill the request. Why is this
>>information not given to the Stream.Read procedure?
>
>It is. That information is Item'length.

Yep. I got this idea a few hours ago. But now it's too late to cancel my
proof of stupity.

>One of the nifty things about Ada is that we don't need a separate
>parameter to specify how large a passed-in buffer is.

I was confused by functions returning arrays. I didn't get at once, that an
OUT parameter implicitly provides the discriminants as IN parameters.

>You may protest that there's no guarantee that they won't give you a
>bigger buffer than they need, but the guarantee is implied.

Don't worry. I got it.