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Date: Mon, 09 Aug 2010 20:29:17 +0200
From: Georg Bauhaus <rm.dash-bauhaus@futureapps.de>
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Subject: Re: S-expression I/O in Ada
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Date: 2010-08-09T20:29:17+02:00
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On 09.08.10 19:05, Robert A Duff wrote:

>>> 7. No array index of

> I think Dmitry was complaining in 7 that you can't do this:
> 
>     type Bit_Map is array(...) of Boolean;
>     type T is array (Bit_Map) of Something; -- Illegal index type.
> 
> whereas if Bit_Map is modular then you CAN do that.

Always takes a while until my slow head grasps Dmitry's
non-Ada semantics.

case {T0 x T1 x T3} is
 when ... => ...

Static dispatch tables on composite types' values
switching to non-subprogram sequences of instructions
wrapped in a case statement that's likely to have
impressive combinatorial properties...

Is there no better way than this?

Experimenting further, what will be a useful type of
case_statement_alternative's discrete choice list, then?
One that can be explored programmatically?


Georg