X-Git-Url: http://git.megacz.com/?p=ghc-hetmet.git;a=blobdiff_plain;f=compiler%2Fparser%2FParserCore.y;h=7c22e2105a89cd4b994de02c494072697a3781db;hp=0289cfcc0d8a63591511e633f56e773a1daec022;hb=8b104b69acda45c272a2faed0f1a2dd7e6972d87;hpb=6e9c0431a7cf2bf1a48f01db48c6a1d41fe15a09

diff --git a/compiler/parser/ParserCore.y b/compiler/parser/ParserCore.y
index 0289cfc..7c22e21 100644
--- a/compiler/parser/ParserCore.y
+++ b/compiler/parser/ParserCore.y
@@ -1,5 +1,14 @@
 {
-{-# OPTIONS -Wwarn -w #-}
+{-# LANGUAGE BangPatterns #-} -- required for versions of Happy before 1.18.6
+{-# OPTIONS -Wwarn -w -XNoMonomorphismRestriction #-}
+-- The NoMonomorphismRestriction deals with a Happy infelicity
+--    With OutsideIn's more conservativ monomorphism restriction
+--    we aren't generalising
+--        notHappyAtAll = error "urk"
+--    which is terrible.  Switching off the restriction allows
+--    the generalisation.  Better would be to make Happy generate
+--    an appropriate signature.
+--
 -- The above warning supression flag is a temporary kludge.
 -- While working on this module you are encouraged to remove it and fix
 -- any warnings in the module. See