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From: =?utf-8?Q?Yannick_Duch=C3=AAne_=28Hibou57?=
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Newsgroups: comp.lang.ada
Subject: Re: subprogram must not be deeper than access type
Date: Tue, 04 Oct 2011 18:47:20 +0200
Organization: Ada @ Home
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Date: 2011-10-04T18:47:20+02:00
List-Id: <comp.lang.ada>

Le Tue, 04 Oct 2011 18:05:57 +0200, Georg Bauhaus  =

<rm.dash-bauhaus@futureapps.de> a =C3=A9crit:
>> Yes, and that's what Functional Languages do. I believe Ada could  =

>> benefit from
>> more FP (it already has something of FP).
>
> How so?
What I miss is currying (thinking in term of currying, help the design  =

too), tail recursion optimization (not part of language this one, but  =

could be advised), and package interface working more like structure  =

signature.

But there are already some great parts of FP in Ada. Value semantic is  =

often enforced, we now have conditional expressions (Ada 2012) and Ada  =

constants are really constants at the level of scope execution (same kin=
d  =

of constants as in FP, not the same as in C/C++).

There was Agol60 and Pascal, FP was a missing influence of Ada.

But FP is neither an Holy Grail. Example: Design By Contract (=E2=84=A2)=
, is not  =

FP. Other example: in real life, references are really required for  =

performances, even if hidden inside package implementation (no one enjoy=
  =

copying a whole structure to update that structure, it's a waste of  =

performance).


-- =

=E2=80=9CSyntactic sugar causes cancer of the semi-colons.=E2=80=9D  [Ep=
igrams on  =

Programming =E2=80=94 Alan J. =E2=80=94 P. Yale University]
=E2=80=9CStructured Programming supports the law of the excluded muddle.=
=E2=80=9D [Idem]
Java: Write once, Never revisit