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Today's Topics:
1. Type inference or just ... a typo in a paper? (Michael Turner)
2. Re: Type inference or just ... a typo in a paper?
(Francesco Ariis)
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Message: 1
Date: Tue, 18 May 2021 17:24:37 +0900
From: Michael Turner <michael.eugene.tur...@gmail.com>
To: beginners@haskell.org
Subject: [Haskell-beginners] Type inference or just ... a typo in a
paper?
Message-ID:
<canhebigjurgkkjar44ps9wyatqdwvjndwm_zc9dycvcfa_d...@mail.gmail.com>
Content-Type: text/plain; charset="UTF-8"
I've inherited some Haskell code, which you can find here:
http://web.cecs.pdx.edu/~mpj/pubs/aug.html
The text of the accompanying paper says, "we extend the Text class..."
-- but the identifier "Text" appears nowhere in the code. Is this just
an error in the paper, or is the Text class getting involved in some
indirect way, e.g. through String or perhaps because of the line
"instance Show Tree where . . ."?
Regards,
Michael Turner
Executive Director
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------------------------------
Message: 2
Date: Tue, 18 May 2021 13:30:58 +0200
From: Francesco Ariis <fa...@ariis.it>
To: beginners@haskell.org
Subject: Re: [Haskell-beginners] Type inference or just ... a typo in
a paper?
Message-ID: <20210518113058.GB879@extensa>
Content-Type: text/plain; charset=utf-8
Hello Michael,
Il 18 maggio 2021 alle 17:24 Michael Turner ha scritto:
> I've inherited some Haskell code, which you can find here:
>
> http://web.cecs.pdx.edu/~mpj/pubs/aug.html
>
> The text of the accompanying paper says, "we extend the Text class..."
> -- but the identifier "Text" appears nowhere in the code. Is this just
> an error in the paper, or is the Text class getting involved in some
> indirect way, e.g. through String or perhaps because of the line
> "instance Show Tree where . . ."?
In the updated source (`augupdated.hs`) that is missing, but in the
/original/ one (`aug.hs`) I read at line 255
instance Text Tree where
Which was then replaced with:
instance Show Tree where
in the updated version.
Weird to know something like `Show` was not named like that in the early
nineties!
—F
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