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Newsgroups: comp.lang.ada
Date: Wed, 21 Jun 2017 04:58:22 -0700 (PDT)
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Subject: Re: Ada Annoyances
From: joakimds@kth.se
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Xref: news.eternal-september.org comp.lang.ada:47033
Date: 2017-06-21T04:58:22-07:00
List-Id: <comp.lang.ada>

Hi! I am also concerned about performance. I really love the object-prefix =
notation but "it's only available for tagged types" (i.e. type Car_Type is =
tagged private;) and thus I also avoid tagged types except for when applica=
ble (i.e. large types i.e. containers). I make heavy use of "use all type" =
instead. Needless to say I am also curious about using tagged types in cust=
om indexers and iterators.

I don't know of a nice solution to your specific case in the Ada language. =
If you use aliased parameters and implicit dereference you will expose the =
whole of your buffer not part of it. The cleanest way forward is for you to=
 use a generic function that will expose part of your array. To see an exam=
ple of this see "procedure Act_On_Immutable_Text (..) " in the Aida.Bounded=
_String package:
https://github.com/joakim-strandberg/aida_2012/blob/master/config/aida_src/=
aida-bounded_string.ads

Another thought on performance is avoiding controlled types where possible.

Best regards,
Joakim