[GHC] #11385: Unify named wildcards in different type applications
GHC
ghc-devs at haskell.org
Tue Jul 5 16:54:23 UTC 2016
#11385: Unify named wildcards in different type applications
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Reporter: Iceland_jack | Owner:
Type: feature request | Status: new
Priority: normal | Milestone:
Component: Compiler (Type | Version: 8.1
checker) | Keywords:
Resolution: | NamedWildCards TypeApplications
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 Iceland_jack):
Continuing with ticket comment:4:ticket:11350, these make sense to me
{{{#!hs
asTypeOf @a = const @a @a
endomap @a = fmap @[] @a @a
}}}
but wait, `asTypeOf @a` × `endomap @a` bind a new type variable. How does
that mesh with your intuition from comment:9:ticket:11350?
{{{#!hs
asTypeOf = \ @a -> const @a @a
-- vs
asTypeOf @a = const @a @a
}}}
--
Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/11385#comment:4>
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