Is there a way to recognize that an Id / Var refers to a default method implementation, e.g. $dm/= in the following?
I'm afraid not. There has never been a reason to do so. And it might not be robust e.g. it might be inlined.
What is the problem you are trying to solve?
Simon
PS: I am leaving Microsoft at the end of November 2021, at which point simonpj@microsoft.commailto:simonpj@microsoft.com will cease to work. Use simon.peytonjones@gmail.commailto:simon.peytonjones@gmail.com instead. (For now, it just forwards to simonpj@microsoft.com.)
From: ghc-devs On Behalf Of Erdi, Gergo via ghc-devs
Sent: 01 December 2021 05:22
To: 'GHC'
Subject: [EXTERNAL] Recognizing default method implementations
PUBLIC
Hi,
Is there a way to recognize that an Id / Var refers to a default method implementation, e.g. $dm/= in the following?
$dm/= :: forall a. Eq a => a -> a -> Bool
[GblId, Arity=3, Unf=OtherCon []]
$dm/=
= \ (@a_ahz)
($dEq_sI6 [Occ=Once1] :: Eq a_ahz)
(x_sI7 [Occ=Once1] :: a_ahz)
(y_sI8 [Occ=Once1] :: a_ahz) ->
case == @a_ahz $dEq_sI6 x_sI7 y_sI8 of {
False -> True;
True -> False
}
Thanks,
Gergo
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