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Date: Wed, 30 Jan 2013 13:02:10 +0100
From: Georg Bauhaus <rm.dash-bauhaus@futureapps.de>
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Subject: Re: Ada standard and maximum line lengths
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Date: 2013-01-30T13:02:11+01:00
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On 30.01.13 10:37, Simon Wright wrote:
> That's GNAT's default_style_  limit on line length, above which you get
> a warning if you ask for style checks (-gnaty). For its own sources
> (maybe not for (all) the libraries?), GNAT treats warnings as errors.

Yes, the GNAT limits enforced by style rules is what I had meant,
thanks for correcting.

I'll guess that these style rules do affect the way sources of GNAT
are structured. For example, deep nesting would need the rules to be
lifted temporarily. Subprogram names lengthened by prefixing package
names with '_' might not work. Thus an implied limit on the length
of identifiers leads to no less than a well known method of OO
analysis, the one that suggests finding the name of objects hidden
in the subprogram's names (Grady Booch expounds).

ada-format-paramlist certainly helps shape the little programs I
write. Happily, this feature, which blends well with limits on line
lengths, is working nicely in the latest Ada mode for Emacs.

Dmitry Kazakov's style of presenting subprogram specs has an
effect on the way I grasp the meaning, I think. An I can see
how it might be compatible with lines of at most 72 characters,
at least for flat structures (everything placed in packages
than can see parent packages, but not look into surrounding
nests, since these are off limits .-)