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From: "Pat Rogers" <progers@NOclasswideSPAM.com>
Subject: Re: Storage space question
Date: 1998/12/10
Message-ID: <74or0g$lgt$1@remarQ.com>#1/1
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References: <9v6hGdgMLuwN-pn2-v5sq1RxFJ1z1@dt182n2f.tampabay.rr.com>
 <366FE278.FAF73497@pwfl.com>
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Organization: Software Arts & Sciences
Newsgroups: comp.lang.ada
Date: 1998-12-10T00:00:00+00:00
List-Id: <comp.lang.ada>

Marin David Condic wrote in message <366FE278.FAF73497@pwfl.com>...
>Craig Allen wrote:
>>
>> Hello!
>>
>> the short version of my question is this:  If I'm using
enumerations
>> to define names that will represent specific bit patterns that my
program
>> may wish to use, do *all* these bit patterns allocate space? e.g.
with
>> this:


<snip>

>In general, a type does not require any space. Only when you
declare
>objects of the type is memory allocated. However, the rules of Ada
>require that certain information be available at run time
concerning a
>type, which means the compiler has to keep that information
somewhere -
>hence memory utilization. Remember that for a given enumeration
type T,
>Ada has a function T'Image which has to return the character string
>associated with the given value (id est, "CARRIER_DETECT",
>"SYNC_DETECT", etc.) I don't think that the representation clauses
would
>have any impact on storage, but maybe one of the compiler-writers
in the
>crowd can fill us in.


See RM C.5(1) re: pragma Discard_Names

>"Transported to a surreal landscape, a young girl kills the first
woman
>she meets and then teams up with three complete strangers to kill
>again."
>
>        -- TV listing for the Wizard of Oz

:-)