From: sgb@erlang.praxis.co.uk (Stephen Bull)
Subject: Re: Help on deciding a data type.
Date: 1996/09/04
Date: 1996-09-04T00:00:00+00:00 [thread overview]
Message-ID: <ytc20gicxob.fsf@erlang.praxis.co.uk> (raw)
In-Reply-To: 322C50E0.167E@sdrc.com
Sreedhar Chintalapaty <Sreedhar.Chintalapaty@sdrc.com> writes:
Is there a way to define some data type here that would let me
exploit the modular mathematics capability of Ada while at the same
time having some representation for the * in the first entry? Or do
I have to resort to definig it as, for instance
type Symbol is Integer range -1..N;
and write my own methods to overload the multiplication and division
functions?
I would suggest defining a record type with two fields: the first is a flag
indicating whether the second is a valid value:
type T is record
Valid : Boolean;
Value : Symbol;
end record;
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Stephen Bull Praxis Critical Systems 20 Manvers Street BATH BA1 1PX UK
+1225 444700 (switchboard) +1225 739286 (direct) +1225 739281 (fax)
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Stephen Bull Praxis Critical Systems 20 Manvers Street BATH BA1 1PX UK
+1225 444700 (switchboard) +1225 739286 (direct) +1225 739281 (fax)
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next prev parent reply other threads:[~1996-09-04 0:00 UTC|newest]
Thread overview: 3+ messages / expand[flat|nested] mbox.gz Atom feed top
1996-09-03 0:00 Help on deciding a data type Sreedhar Chintalapaty
1996-09-04 0:00 ` Stephen Bull [this message]
1996-09-05 0:00 ` Robert I. Eachus
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