#7156: "Pattern match on GADT" error for non-GADT
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Reporter: ryani | Owner:
Type: bug | Status:
new
Priority: normal | Milestone:
Component: Compiler (Type checker) | Version:
7.0.4
Keywords: GADTs, TypeFamilies, ExistentialQuantification | Os:
Unknown/Multiple
Architecture: Unknown/Multiple | Failure:
None/Unknown
Difficulty: Unknown | Testcase:
Blockedby: | Blocking:
Related: |
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Comment(by simonpj@…):
commit 3eb6e211dec006f3609dd880cbef83ee2ad719de
{{{
Author: Simon Peyton Jones <simo...@microsoft.com>
Date: Mon Aug 20 14:28:00 2012 +0100
When pattern matching against a constructor with equalities,
require either -XGADTs *or* -XTypeFamilies (rather than only the
former)
Fixes Trac #7156
compiler/typecheck/TcPat.lhs | 10 ++++++----
1 files changed, 6 insertions(+), 4 deletions(-)
}}}
--
Ticket URL: <http://hackage.haskell.org/trac/ghc/ticket/7156#comment:7>
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