Re: pattern signatures

Further complicated by the fact that that form used to be called a "pattern signature" with accompanying extension, until that was folded into ScopedTypeVariables extension. On Fri, Jan 5, 2018 at 9:41 AM, Simon Peyton Jones via ghc-devs < ghc-devs@haskell.org> wrote:

Ah yes. I think we started with "pattern synonym signature" for (b) but have since denenerated to "pattern signature" which is quite confusing.

User advice would be good!

S

| -----Original Message----- | From: ghc-devs [mailto:ghc-devs-bounces@haskell.org] On Behalf Of | Richard Eisenberg | Sent: 05 January 2018 13:48 | To: GHC | Subject: pattern signatures | | Hi devs, | | Is a pattern signature | | a) something you put after `pattern P ::` ? | b) something you put after `::` in a pattern, as in `foo (Proxy :: | Proxy a)` ? | | I've seen the term "pattern signature" apply to both, and I've been | tripped up by this. Does anyone have terminology that unambiguously | separates these two constructs that we can all adopt? | | Thanks! | Richard | _______________________________________________ | ghc-devs mailing list | ghc-devs@haskell.org | https://na01.safelinks.protection.outlook.com/?url=http%3A%2F%2Fmail.h | askell.org%2Fcgi-bin%2Fmailman%2Flistinfo%2Fghc- | devs&data=02%7C01%7Csimonpj%40microsoft.com%7Cbc86346cc90f4a9516d108d5 | 5442f5a0%7C72f988bf86f141af91ab2d7cd011db47%7C1%7C0%7C6365075689386605 | 89&sdata=gvjnHyGAojz982UEV1u0hZPKH%2B%2F3UjiDlQm10%2BRZ7r8%3D&reserved | =0 _______________________________________________ ghc-devs mailing list ghc-devs@haskell.org http://mail.haskell.org/cgi-bin/mailman/listinfo/ghc-devs

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