From: Dmitry Bely <dbely@mail.ru>
To: caml-list@inria.fr
Subject: Re: [Caml-list] default values for record field definitions
Date: 19 Jul 2001 11:02:31 +0400 [thread overview]
Message-ID: <vgkph054.fsf@mail.ru> (raw)
In-Reply-To: <3B565E7B.35BB6073@quasar.ipa.nw.ru>
"Alexander V. Voinov" <avv@quasar.ipa.nw.ru> writes:
> It may well be that I'm not in the first hundred of those who proposed
> this, if so - sorry :-).
>
> Why not to introduce a syntax for default values of record fields:
>
> type rec1 = { attr1: type1 = val1; attr2: type2; attr3: type3 = val3 }
>
> It this case constructions of the form
>
> let x = { attr2 = val2 } are possible, with other fields filled by val1,
> val3.
>
> Can it be done via camlp4?
Why don't you like
type rec1 = { attr1: type1; attr2: type2; attr3: type }
let default_rec1 = { attr1 = init_val1; attr2 = init_val2; attr = init_val3 }
...
let x = { default_rec1 with attr2 = val2 }
?
Hope to hear from you soon,
Dmitry
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next prev parent reply other threads:[~2001-07-19 7:05 UTC|newest]
Thread overview: 7+ messages / expand[flat|nested] mbox.gz Atom feed top
2001-07-19 4:13 Alexander V. Voinov
2001-07-19 6:43 ` Ian Zimmerman
2001-07-19 13:35 ` David Mentre
2001-07-19 7:02 ` Dmitry Bely [this message]
2001-07-19 16:20 ` Alexander V. Voinov
2001-07-20 9:42 ` FabienFleutot
2001-07-21 13:16 ` Daniel de Rauglaudre
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