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From: =?utf-8?Q?Yannick_Duch=C3=AAne_=28Hibou57?=
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Newsgroups: comp.lang.ada
Subject: Re: Ada platforms and pricing, was: Re: a new language, designed for
 safety !
Date: Thu, 26 Jun 2014 05:41:31 +0200
Organization: Ada @ Home
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Xref: news.eternal-september.org comp.lang.ada:20608
Date: 2014-06-26T05:41:31+02:00
List-Id: <comp.lang.ada>

Le Tue, 24 Jun 2014 13:25:38 +0200, Dan'l Miller <optikos@verizon.net> a=
  =

=C3=A9crit:

> On Tuesday, June 24, 2014 5:24:03 AM UTC-5, Simon Wright wrote:
>> Shark8 writes:
>> > On 23-Jun-14 13:21, Dan'l Miller wrote:
>> >> In the spirit of lambasting the lack of direct representation
>> >> of finite-state machines (FSMs) in Ada:
>>
>> > Wtf, there's a direct representation for state-machines:
>
>   No, Shark8, that is the epitome of *not* direct representation of  =

> state-machines as a first-class citizen in {Ada, C, C++, ...}, because=
  =

> the compiler has absolutely no clue that all the enumerations &  =

> branching are representing an FSM.  For example, (without an enormous =
 =

> amount of temporal-logic analysis, program slicing, and term-rewriting=
)  =

> the compiler cannot directly observe:  oh, the programmer wrote a Moor=
e  =

> machine (see below), but I can optimize the whole FSM by transforming =
it  =

> to a Mealy machine, or vice versa.  As another example, (without an  =

> enormous amount of temporal-logic analysis, program slicing, and  =

> term-rewriting) the compiler cannot perform any graph-theoretic  =

> transforms on the FSM, because the FSM is contorted into  =

> excessively-sequential imperative code instead of declarative.

Yes, that's what made me wonder if loop with cases switch is really that=
  =

good for a state machine, as you get a three=E2=80=91steps=E2=80=91goto:=
 assign the sate  =

variable, continue the loop, select case of the state variable. But  =

goto=E2=80=91labels are so ugly with Ada=E2=80=A6

-- =

=E2=80=9CSyntactic sugar causes cancer of the semi-colons.=E2=80=9D [1]
=E2=80=9CStructured Programming supports the law of the excluded muddle.=
=E2=80=9D [1]
[1]: Epigrams on Programming =E2=80=94 Alan J. =E2=80=94 P. Yale Univers=
ity