Re: Can Haskell compare functions?

From	Paul Rubin <no.email@nospam.invalid>
Newsgroups	comp.lang.haskell
Subject	Re: Can Haskell compare functions?
References	<3fafb2e6-b33c-4e98-a694-646c8acc5fe0@wj4g2000pbc.googlegroups.com> <7xehs0auhb.fsf@ruckus.brouhaha.com> <20447649.332.1334742000154.JavaMail.geo-discussion-forums@vbvd13>
Date	2012-04-18 22:23 -0700
Message-ID	<7xty0g47mh.fsf@ruckus.brouhaha.com> (permalink)
Organization	Nightsong/Fort GNOX

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Roman W <bloody_rabbit@gazeta.pl> writes:
> Could it at least provide a comparison of function *implementations*?
> Something like a function pointer comparison in C.

Haskell doesn't have object identity, as I think that would break
referential transparency.  There is a hacky library called "stable
names" that might be useable for some such purposes:

http://www.haskell.org/ghc/docs/6.12.1/html/libraries/base/System-Mem-StableName.html

Stable names live in the IO monad so you can't use them in pure code.

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Can Haskell compare functions? ultranewb <pineapple.link@yahoo.com> - 2012-04-06 23:48 -0700
  Re: Can Haskell compare functions? Paul Rubin <no.email@nospam.invalid> - 2012-04-07 00:09 -0700
    Re: Can Haskell compare functions? Paul Rubin <no.email@nospam.invalid> - 2012-04-07 00:18 -0700
    Re: Can Haskell compare functions? Roman W <bloody_rabbit@gazeta.pl> - 2012-04-18 02:40 -0700
      Re: Can Haskell compare functions? Paul Rubin <no.email@nospam.invalid> - 2012-04-18 22:23 -0700

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