From: lutz@iks-jena.de (Lutz Donnerhacke)
Subject: Re: Multidimensional array vs. array of array
Date: Mon, 17 Dec 2001 15:56:28 +0000 (UTC)
Date: 2001-12-17T15:56:28+00:00 [thread overview]
Message-ID: <slrna1s5d7.k2.lutz@taranis.iks-jena.de> (raw)
In-Reply-To: 40wR7.34446$ER5.389337@rwcrnsc52
* Mark Lundquist wrote:
>"Lutz Donnerhacke" <lutz@iks-jena.de> wrote in message
>> How does a skilled Ada programmer define a return type containing a
>> multidimensional array? Of course, the simple solution works:
>>
>> type Equations is array (Rows range <>, Columns range <>) of Number;
>> type Workspace (row : Rows; col : Columns) is record
>> eqs : Equations (Rows'First .. row, Columns'First .. col);
>> ... some more stuff ...
>> end record;
>> function Init_Workspace return Workspace;
>>
>> But this approach fails miserably on extracting a single row from the
>> result as well as on construction the result in a recursive function.
>
>Would it help you to just define a distinct type to represent a row in
>isolation, but keep your matrix as defined above (i.e. not in terms of
>composition of the row type)?
After returning the Workspace in order to define a unconstrained variables,
it is possible.
next prev parent reply other threads:[~2001-12-17 15:56 UTC|newest]
Thread overview: 9+ messages / expand[flat|nested] mbox.gz Atom feed top
2001-12-11 22:22 Multidimensional array vs. array of array Lutz Donnerhacke
2001-12-11 22:45 ` Mark Lundquist
2001-12-17 15:56 ` Lutz Donnerhacke [this message]
2001-12-11 23:03 ` Stephen Leake
2001-12-12 8:39 ` Lutz Donnerhacke
2001-12-13 0:26 ` James Rogers
2001-12-13 9:02 ` Lutz Donnerhacke
2001-12-13 21:49 ` Nick Roberts
2001-12-14 9:45 ` Lutz Donnerhacke
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