Added parsing rule for BangPattern in case expr

diff --git a/compiler/parser/Parser.y.pp b/compiler/parser/Parser.y.pp
index f9a6945..898d45c 100644 (file)
--- a/compiler/parser/Parser.y.pp
+++ b/compiler/parser/Parser.y.pp
@@ -1104,6 +1104,8 @@ alts1     :: { Located [LMatch RdrName] }
 alt    :: { LMatch RdrName }
        : infixexp opt_sig alt_rhs      {%  checkPattern $1 >>= \p ->
                                            return (LL (Match [p] $2 (unLoc $3))) }
+       | '!' infixexp opt_sig alt_rhs  {%  checkPattern $2 >>= \p ->
+                                           return (LL (Match [LL $ BangPat p] $3 (unLoc $4))) }
 
 alt_rhs :: { Located (GRHSs RdrName) }
        : ralt wherebinds               { LL (GRHSs (unLoc $1) (unLoc $2)) }