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From: Simon Wright <simon@pushface.org>
Newsgroups: comp.lang.ada
Subject: Re: STM32F4 GNAT Run Time System - roadmap
Date: Mon, 15 Jun 2015 20:03:03 +0100
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Date: 2015-06-15T20:03:03+01:00
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Simon Wright <simon@pushface.org> writes:

> It would be very nice to be able to use the generalized container
> iterators of Ada 2012 (generalized array iterators are already OK).
>
> They require finalization: I've implemented finalization and generalized
> iteration over Bounded_Vectors in the 'finalization' branch at [2].
>
> Unfortunately, adding finalization to a restricted runtime triggers bugs
> in GCC.
>
> I've raised two GCC PRs; "gnatbind generates invalid code when
> finalization is enabled in restricted runtime"[3], and "Front-end error
> if exception propagation disabled"[4].
>
> =====================================================================
> [0] http://uk.farnell.com/stm32-mcu-nucleo-board-flexible-prototyping
> [1] https://launchpad.net/gcc-arm-embedded
> [2]
> https://sourceforge.net/p/stm32f4-gnat-rts/code/ci/finalization/tree/
> [3] https://gcc.gnu.org/bugzilla/show_bug.cgi?id=66205
> [4] https://gcc.gnu.org/bugzilla/show_bug.cgi?id=66242

The patch for [4] was reasonably-well received, but AdaCore want to take
it rather further than I did. Only just posted the patch for [3].

So I don't think I'll be able to support generalized container iterators
for a while yet :-)