From: Edgar Friendly <thelema314@gmail.com>
To: "Seth J. Fogarty" <sfogarty@gmail.com>
Cc: caml-list <caml-list@yquem.inria.fr>
Subject: Re: [Caml-list] Polymorphic Variants
Date: Tue, 16 Jan 2007 15:45:28 -0600 [thread overview]
Message-ID: <45AD4778.4010402@gmail.com> (raw)
In-Reply-To: <c7ee61120701161323r4bd66f35sd1d7c6253431bcdd@mail.gmail.com>
Seth J. Fogarty wrote:
>> using records with overloaded fields and subtyping, so that you could
>> have:
>> type top = {common of string}
>> type one_level_deep = {top | my_only of int}
>>
>> type independent = {my_only of string}
>> so this would be possible:
>> let to_str x -> x.common
>>
>> to_str {common = "first"}; to_str {common = "second"; my_only = 0}
>> ?
>
> OCaml does not, as far as I know, have any structural typing for
> records.. and I am not sure this would be at all cleaner. It might
> WORK, but it would be just as ugly, if not uglier.
>
>
OCaml's records are tuples with named accessors to the components.
Within a namespace, these accessors must be unique, so the type
independent wouldn't be possible, because the my_only component wouldn't
always be in the same position.
E.
next prev parent reply other threads:[~2007-01-16 21:45 UTC|newest]
Thread overview: 34+ messages / expand[flat|nested] mbox.gz Atom feed top
2007-01-16 20:32 Tom
2007-01-16 20:49 ` [Caml-list] " Seth J. Fogarty
2007-01-16 21:05 ` Tom
2007-01-16 21:23 ` Seth J. Fogarty
2007-01-16 21:45 ` Edgar Friendly [this message]
2007-01-16 22:18 ` Lukasz Stafiniak
2007-01-17 5:55 ` skaller
2007-01-17 0:30 ` Jonathan Roewen
2007-01-17 2:19 ` Jacques GARRIGUE
2007-01-17 3:24 ` Christophe TROESTLER
2007-01-18 2:12 ` Jacques Garrigue
2007-01-17 6:09 ` skaller
2007-01-17 13:34 ` Andrej Bauer
2007-01-17 21:13 ` Tom
2007-01-17 22:53 ` Jon Harrop
2007-01-17 23:07 ` Tom
[not found] ` <200701172349.53331.jon@ffconsultancy.com>
[not found] ` <c1490a380701180407j670a7cccyb679c71fde20aa4b@mail.gmail.com>
2007-01-18 16:23 ` Fwd: " Tom
2007-01-18 21:14 ` Jon Harrop
2007-01-19 9:26 ` Dirk Thierbach
2007-01-19 10:35 ` Tom
2007-01-19 11:14 ` Dirk Thierbach
2007-01-19 12:03 ` Tom
2007-01-18 21:43 ` Christophe TROESTLER
2007-01-18 1:28 ` Jacques Garrigue
2007-01-18 1:46 ` Jon Harrop
2007-01-18 4:05 ` skaller
2007-01-18 6:20 ` Jacques Garrigue
2007-01-18 9:48 ` skaller
2007-01-18 12:23 ` Tom
-- strict thread matches above, loose matches on Subject: below --
2002-04-17 9:49 [Caml-list] Polymorphic variants John Max Skaller
2002-04-17 10:43 ` Remi VANICAT
2002-04-17 23:49 ` John Max Skaller
2002-04-18 1:23 ` Jacques Garrigue
2002-04-18 9:04 ` John Max Skaller
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