From: Miguel Mitrofanov <miguelimo38@yandex.ru>
To: Michael Shulman <shulman@math.uchicago.edu>, <categories@mta.ca>
Subject: Re: Functions in programming
Date: Sat, 14 Mar 2009 17:51:54 +0300 [thread overview]
Message-ID: <67072EDB-6E6F-4033-8AE3-6BD04614BF60@yandex.ru> (raw)
On 14 Mar 2009, at 06:22, Michael Shulman wrote:
> Normal programming languages do not generally come
> with predefined types that admit no values, since such types are
> evidently not very useful!
That's not exactly true. There is a huge area of type-level
programming (or metaprogramming, as it's called sometimes), and empty
types are useful as some sort of "flags" in this type of programming.
Of course, you can allow some values of this types, but this is what
makes no sense in this case.
next reply other threads:[~2009-03-14 14:51 UTC|newest]
Thread overview: 27+ messages / expand[flat|nested] mbox.gz Atom feed top
2009-03-14 14:51 Miguel Mitrofanov [this message]
-- strict thread matches above, loose matches on Subject: below --
2009-03-21 16:06 Bill Lawvere
2009-03-20 21:18 Robin Cockett
2009-03-19 15:37 Peter Selinger
2009-03-19 15:37 Peter Selinger
2009-03-19 14:18 Peter Selinger
2009-03-19 14:11 MigMit
2009-03-19 2:32 Robin Cockett
2009-03-18 15:34 Bill Lawvere
2009-03-17 23:06 Robin Cockett
2009-03-17 5:17 Nathan Bloomfield
2009-03-16 15:12 Andrew Stacey
2009-03-16 11:37 Miles Gould
2009-03-16 9:27 Tom Hirschowitz
2009-03-16 5:52 Vaughan Pratt
2009-03-16 4:25 Daniel Schüssler
2009-03-15 23:55 Thorsten Altenkirch
2009-03-15 22:18 Robin Cockett
2009-03-14 19:52 Ellis D. Cooper
2009-03-14 17:39 Thorsten Altenkirch
2009-03-14 14:58 Steve Stevenson
2009-03-14 9:51 Luis Barbosa
2009-03-14 6:02 Vaughan Pratt
2009-03-14 3:38 Fred E.J. Linton
2009-03-14 3:22 Michael Shulman
2009-03-14 2:21 Charles Wells
2009-03-13 11:29 Andrew Stacey
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