From mboxrd@z Thu Jan  1 00:00:00 1970
X-Spam-Checker-Version: SpamAssassin 3.4.6 (2021-04-09) on
	ip-172-31-65-14.ec2.internal
X-Spam-Level: 
X-Spam-Status: No, score=0.8 required=3.0 tests=BAYES_50,FREEMAIL_FROM,
	T_SCC_BODY_TEXT_LINE autolearn=ham autolearn_force=no version=3.4.6
X-Received: by 2002:a05:6214:3901:b0:535:5ee6:4ca5 with SMTP id nh1-20020a056214390100b005355ee64ca5mr472392qvb.96.1674423258679;
        Sun, 22 Jan 2023 13:34:18 -0800 (PST)
X-Received: by 2002:a05:6870:e97:b0:144:bbfc:ba96 with SMTP id
 mm23-20020a0568700e9700b00144bbfcba96mr1390496oab.18.1674423258431; Sun, 22
 Jan 2023 13:34:18 -0800 (PST)
Path: eternal-september.org!reader01.eternal-september.org!usenet.blueworldhosting.com!feed1.usenet.blueworldhosting.com!peer02.iad!feed-me.highwinds-media.com!news.highwinds-media.com!news-out.google.com!nntp.google.com!postnews.google.com!google-groups.googlegroups.com!not-for-mail
Newsgroups: comp.lang.ada
Date: Sun, 22 Jan 2023 13:34:18 -0800 (PST)
Injection-Info: google-groups.googlegroups.com; posting-host=157.143.56.236; posting-account=Wbe3fAoAAAALa8UT9MWTy6mw2ahlRJms
NNTP-Posting-Host: 157.143.56.236
User-Agent: G2/1.0
MIME-Version: 1.0
Message-ID: <9c7cccd9-733f-49a8-b482-087ccb14b58dn@googlegroups.com>
Subject: Real_Arrays on heap with overloaded operators and clean syntax
From: Jim Paloander <dhmos.altiotis@gmail.com>
Injection-Date: Sun, 22 Jan 2023 21:34:18 +0000
Content-Type: text/plain; charset="UTF-8"
Content-Transfer-Encoding: quoted-printable
X-Received-Bytes: 2033
Xref: reader01.eternal-september.org comp.lang.ada:64846
List-Id: <comp.lang.ada>

Dear ADA lovers,
with stack allocation of Real_Vector ( 1 .. N ) when N >=3D 100,000 I get S=
TACK_OVERFLOW ERROR while trying to check how fast operator overloading is =
working for an expression=20

X :=3D A + B + C + C + A + B, where=20
A,B,C,X are all Real_Vector ( 1 .. N ).=20

So my only option was to allocate on the heap using new. But then I lost th=
e clean syntax=20

X :=3D A + B + C + C + A + B=20

and I had to write instead:=20

X.all :=3D A.all + B.all + C.all + C.all + A.all + B.all.=20

This is really ugly and annoying because when you are using Real_Arrays for=
 implementing some linear algebra method who relies heavilly on matrix vect=
or products and vector updates, you do need to allocate on the heap (sizes =
are determined in runtime) and you do need a clean syntax. So, is there any=
 way to simplify my life without using the .all or even without declaring A=
,B,C,X as access Real_Vector?
Thanks for your time!