Issue 18207: Domain<> is used when unneeded (vsiplxx-rtf)
Source:  (Mr. Brooks Moses, brooks.moses(at)dpdx.net)
Nature: Enhancement
Severity: Minor
Summary: There are several places where the VSIPL++ passes Domain<> arguments
where only the length portions of the domain are used.  The Dense()
constructors are the most egregious cases, but there are others such as
Fftm().  This is confusing to users -- we've noticed this in training
classes -- and leads to unnecessarily initializing and passing around
the unused fields in the Domain objects.


It would be better to add a smaller object -- e.g., Length<>, equivalent
to Index<> -- that contains only the length values, and to redefine
these interfaces in terms of it.  Implementations can continue to
support the Domain<> versions of the interfaces for backwards compatibility.


In most of these cases where N is fixed, it would also be an even
clearer (and unambiguous) interface to simply accept N length values as
integer arguments, and I suggest that those interfaces should be added
as well.  We already effectively have them for the N=1 case because of
the implicit Domain<1>(int) constructor.


Resolution: In the interest of closing the current RTF so that the solutions to resolved issues can be made publically available, this issue is deferred to the next RTF.
Disposition: Deferred
Revised Text: 
Actions taken:
October 23, 2012: received issue
Discussion: 

End of Annotations:=====
te: Tue, 23 Oct 2012 12:09:33 -0700
From: Brooks Moses <brooks_moses@mentor.com>
User-Agent: Mozilla/5.0 (Windows NT 6.1; WOW64; rv:10.0.2) Gecko/20120216 Thunderbird/10.0.2
To: <issues@omg.org>
Subject: VSIPL++ issue (#16 from me)
X-OriginalArrivalTime: 23 Oct 2012 19:09:34.0169 (UTC) FILETIME=[F0107490:01CDB151]

Name:            Brooks Moses
Employer:        Mentor Graphics
mailFrom:        brooks_moses@mentor.com
Terms_Agreement: I agree
Specification:   VSIPL++
Section:         6.3 [block.dense] and others
FormalNumber:    ptc/2012-07-27
Version:         1.2 - FTF Beta 1
Doc_Year:        2012
Doc_Month:       August
Doc_Day:         10
Page:            28 and others
Title:           Domain<> is used when unneeded.
Nature:          Enhancement
Severity:        Minor
B1:              Report Issue

Description:

There are several places where the VSIPL++ passes Domain<> arguments
where only the length portions of the domain are used.  The Dense()
constructors are the most egregious cases, but there are others such as
Fftm().  This is confusing to users -- we've noticed this in training
classes -- and leads to unnecessarily initializing and passing around
the unused fields in the Domain objects.

It would be better to add a smaller object -- e.g., Length<>, equivalent
to Index<> -- that contains only the length values, and to redefine
these interfaces in terms of it.  Implementations can continue to
support the Domain<> versions of the interfaces for backwards compatibility.

In most of these cases where N is fixed, it would also be an even
clearer (and unambiguous) interface to simply accept N length values as
integer arguments, and I suggest that those interfaces should be added
as well.  We already effectively have them for the N=1 case because of
the implicit Domain<1>(int) constructor.

- Brooks