Fwd: Re: [Haskell-cafe] Wikipedia on first-class object

27 Dec 2007

      ------- Forwarded message -------
From: "Cristian Baboi" 
To: "Yitzchak Gale" 
Cc:
Subject: Re: [Haskell-cafe] Wikipedia on first-class object
Date: Thu, 27 Dec 2007 12:21:44 +0200

I think I found the answer to why functions cannot be written to files.

This is by design. Haskell must be free.
Enabling writing functions to files, might make it ilegal in some
countries. :-)

On Thu, 27 Dec 2007 11:10:21 +0200, Yitzchak Gale  wrote:
...
Like any type, only certain operations make
sense on functions. Strings can be compared to each
other for equality and written to a disk, and you
can take the logarithm of a float, but none of those
operations make sense for functions. In particular,
two functions are equal only if they produce
the same value for every input, and in general it is
impossible for a computer to check that.
-Yitz
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