[GHC] #16232: Add setField to HasField
GHC
ghc-devs at haskell.org
Thu Jan 24 22:52:24 UTC 2019
#16232: Add setField to HasField
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Reporter: adamgundry | Owner: (none)
Type: feature request | Status: new
Priority: normal | Milestone: 8.10.1
Component: Compiler (Type | Version: 8.7
checker) |
Resolution: | Keywords: ORF
Operating System: Unknown/Multiple | Architecture:
| Unknown/Multiple
Type of failure: None/Unknown | Test Case:
Blocked By: | Blocking:
Related Tickets: | Differential Rev(s):
Wiki Page: |
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Comment (by mpickering):
It seems quite straightforward to generate the necessary core. I think you
mean that you would generate:
{{{
\ r x -> case r of MkT _ bar -> MkT x bar
}}}
You don't need to mention any wired-in Ids or anything so it seems simple?
It also doesn't seem like a lot of work to me in the grand scheme of
things so I wouldn't mind doing it every time one of these constraints is
solved.
--
Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/16232#comment:1>
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