#3290: Add Functor, Applicative, Monad, and Monoid instances for ParseResult
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Reporter: YitzGale | Owner:
Type: proposal | Status: new
Priority: normal | Component: libraries (other)
Version: 6.10.3 | Severity: normal
Keywords: haskell-src | Testcase:
Os: Unknown/Multiple | Architecture: Unknown/Multiple
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In the haskell-src package, add the following instances to !ParseResult:
{{{
instance Functor ParseResult
instance Applicative ParseResult
instance Monad ParseResult
instance Monoid m => Monoid (ParseResult m)
}}}
This makes it more convenient to traverse and modify
a syntax tree that is the result of the parser.
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Ticket URL: <http://hackage.haskell.org/trac/ghc/ticket/3290>
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