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From: Simon Wright <simon@pushface.org>
Newsgroups: comp.lang.ada
Subject: Re: Containers on small systems
Date: Thu, 05 Feb 2015 09:40:50 +0000
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Date: 2015-02-05T09:40:50+00:00
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Simon Wright <simon@pushface.org> writes:

> "Randy Brukardt" <randy@rrsoftware.com> writes:

>> A bounded container is only as big as you need it to be. (Well,
>> unless the compiler is doing something unfriendly.) Not having
>> bounded containers is pretty much like not having arrays, IMHO.
>
> Of course this is just GNAT, but the amount of support software
> required to support their Containers (called in by finalization,
> exception propagation, dispatching, streams ...) is large. I see AARM
> A.18.19(6.a) indicates that Iterator and Reference types could be left
> out in restricted environments (so no "for A of B loop ..."?), which
> would eliminate the need for finalization and dispatching .. maybe
> something can be done.

Haven't tried Containers yet, but adding tagged types, secondary stack
and allocators increased the size of RTS from 12276 bytes to 20584. That
was compiled with -O0 (still need the debugger a lot!) which
more-or-less doubles the size from -O2; I'll try -Os (minimise size) and
see how that plays with the debugger.

Oh, and it doesn't support wide characters in tag names. I think that'd
just be a matter of including the support packages and uncommenting the
parts of Ada.Tags that use them.