From: Niklas Holsti <niklas.holsti@tidorum.invalid>
Subject: Re: Performance of records with variant parts
Date: Thu, 1 Apr 2021 16:38:46 +0300 [thread overview]
Message-ID: <icm0n6F6b3pU1@mid.individual.net> (raw)
In-Reply-To: <9233bc10-091c-46af-b613-504bcb5e1c82n@googlegroups.com>
On 2021-04-01 3:03, John Perry wrote:
> A function returns an Intersection_Type, which has several fields,
> one of which was a Thing_Type. So if Thing_Type is variant,
> Intersection_Type also has to be variant.
No.
I assume by "X is variant" you mean that X has a variant_part (RM 3.8.1(2)).
If the discriminant of Thing_Type has a default value, Intersection_Type
can have a Thing_Type component without supplying it with a discriminant
value, and Intersection_Type need not have discriminants nor a variant part.
next prev parent reply other threads:[~2021-04-01 13:38 UTC|newest]
Thread overview: 24+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-03-22 17:02 Performance of records with variant parts John Perry
2021-03-22 17:32 ` Jeffrey R. Carter
2021-03-22 17:49 ` John Perry
2021-03-22 17:54 ` John Perry
2021-03-22 19:31 ` Jeffrey R. Carter
2021-03-22 22:11 ` John Perry
2021-03-23 9:31 ` Jeffrey R. Carter
2021-03-23 14:27 ` Simon Wright
2021-03-23 23:00 ` John Perry
2021-03-23 23:27 ` Jeffrey R. Carter
2021-03-26 15:38 ` Stephen Leake
2021-03-26 15:44 ` John Perry
2021-03-30 7:12 ` Emmanuel Briot
2021-04-01 0:03 ` John Perry
2021-04-01 6:45 ` Emmanuel Briot
2021-04-01 13:38 ` Niklas Holsti [this message]
2021-04-02 16:07 ` John Perry
2021-03-22 17:39 ` Dmitry A. Kazakov
2021-03-22 17:45 ` John Perry
2021-03-22 18:07 ` Dmitry A. Kazakov
2021-03-22 18:23 ` John Perry
2021-03-22 20:30 ` Dmitry A. Kazakov
2021-03-22 18:59 ` Niklas Holsti
2021-03-22 21:54 ` John Perry
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