From: AdaMagica <christ-usch.grein@t-online.de>
Subject: Re: "unconstrained subtype in component declaration" vs "discriminant in constraint must appear alone"
Date: Mon, 22 Feb 2021 02:14:45 -0800 (PST) [thread overview]
Message-ID: <67ea71d9-489a-4802-9cf0-d955f6ecce62n@googlegroups.com> (raw)
In-Reply-To: <s0vj5f$u8s$1@dont-email.me>
J-P. Rosen schrieb am Montag, 22. Februar 2021 um 07:32:27 UTC+1:
> 3) Sets_of_Card (0..nb-1)
>Yes, you cannot make computations
> in a discriminant constraint. Although this may seem sometimes
> frustrating to the user, it was required for implementation reasons.
Remeber, a discriminant is a record component like the others, so it covers some bits.
If it were allowed to be used in expressions, either each result would need a storage place of its own or a reevaluation at every use of the object.
next prev parent reply other threads:[~2021-02-22 10:14 UTC|newest]
Thread overview: 21+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-02-22 0:14 "unconstrained subtype in component declaration" vs "discriminant in constraint must appear alone" Mehdi Saada
2021-02-22 6:32 ` J-P. Rosen
2021-02-22 10:14 ` AdaMagica [this message]
2021-02-22 10:57 ` Dmitry A. Kazakov
2021-02-22 14:20 ` Mehdi Saada
2021-02-22 15:11 ` J-P. Rosen
2021-02-22 15:55 ` Dmitry A. Kazakov
2021-02-22 16:21 ` Mehdi Saada
2021-02-23 22:06 ` Mehdi Saada
2021-02-24 9:59 ` AdaMagica
2021-02-24 10:04 ` Jeffrey R. Carter
2021-02-24 14:11 ` Simon Wright
2021-02-24 15:57 ` Shark8
2021-02-25 0:13 ` Mehdi Saada
2021-02-25 8:58 ` AdaMagica
2021-02-25 10:25 ` Mehdi Saada
2021-02-25 10:28 ` Mehdi Saada
2021-02-22 10:35 ` Jeffrey R. Carter
2021-02-22 14:21 ` Mehdi Saada
2021-02-22 15:02 ` Jeffrey R. Carter
2021-02-22 15:08 ` J-P. Rosen
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