#1497: Rebinding (:) -- built-in syntax, or just another constructor?
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Reporter: dons | Owner:
Type: bug | Status: closed
Priority: low | Milestone:
Component: Compiler (Parser) | Version: 6.6
Severity: normal | Resolution: invalid
Keywords: | Difficulty: Easy (1 hr)
Os: Unknown | Testcase:
Architecture: Multiple |
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Changes (by simonmar):
* resolution: => invalid
* status: new => closed
Comment:
GHC is right here, I think. It's disallowed by the Haskell 98 syntax: a
data declaration can define a `consym`, which excludes all `reservedop`,
and `:` is one of the `reservedop`s.
Of course it's convenient for the compiler to allow you to define `:`,
because then the Prelude can define the built-in list type, which is
probably why Hugs allows this. GHC also does this, but adds extra
checks to disallow defining `:` outisde of the standard libraries, as per
Haskell 98.
--
Ticket URL: <http://hackage.haskell.org/trac/ghc/ticket/1497>
GHC <http://www.haskell.org/ghc/>
The Glasgow Haskell Compiler
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