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From: rentmei@asterix.uni-muenster.de (Jahn Rentmeister)
Newsgroups: comp.lang.ada
Subject: Re: Ada can't initialize (aggregate) array of length 1?
Date: 13 Dec 1994 17:01:20 GMT
Organization: Westfaelische Wilhelms-Universitaet Muenster, Germany
Message-ID: <3ckk10$1r0a@majestix.uni-muenster.de>
References: <1994Dec12.081230.24978@roxi.rz.fht-mannheim.de>
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Date: 1994-12-13T17:01:20+00:00
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Gentle (gentle@cnj.digex.net) wrote:
: On Mon, 12 Dec 94 08:12:30 CET, Dirk Zoller (duz@roxi.rz.fht-mannheim.de) wrote:
: : Simplified I did this:

: :     type stone is array (1..2) of character;
: :     shapes: constant array (1..1) of stone := ("[]");
: :     ____________________________________________^

:   You're trying to squash a string of length 2 into a character space.
: Try initializing like this:

:   shapes: constant array (1..1) of stone := (1 => ('[',']'));

: Although type stone could have been declared as a subtype of STRING of
: length 2, then your initialization would have worked.

I don't think so. (Let's be careful, I did not check it in a reference,
either. But nevertheless, I'm just as sure as you were. :-)

The ""-literals are available for _all_ arrays of characters, not only for
the predefined type string. The ('[',']') aggregate is equivalent (as far as it
matters here) to the "[]" literal.

The reason why your code worked and the code of Dirk Zoller didn't was the
"1 =>". 

For an Ada compiler ("[]") does not look like an array aggregate: It's a
single string. Therefore one has to use named notation like in (1=>"[]") or
(others=>"[]"). The latter works only if the range "others" stands for is
known to the compiler. (in this case, it is).

Declaring stone to be a subtype of STRING would probably be helpful when doing
output, though.

: Too much of a good thing is WONDERFUL.
: 		-- Mae West
Me, too.
-Jahn