X-Git-Url: http://git.megacz.com/?p=ghc-hetmet.git;a=blobdiff_plain;f=compiler%2Fparser%2FLexer.x;h=07179b858460b66e518665facdc5277208279f55;hp=eab9419369d527311ffa41a74b236329891bff96;hb=5289f5d85610f71625a439747a09384876655eb5;hpb=83d563cb9ede0ba792836e529b1e2929db926355

diff --git a/compiler/parser/Lexer.x b/compiler/parser/Lexer.x
index eab9419..07179b8 100644
--- a/compiler/parser/Lexer.x
+++ b/compiler/parser/Lexer.x
@@ -32,6 +32,7 @@
 
 {
 -- XXX The above flags turn off warnings in the generated code:
+{-# LANGUAGE BangPatterns #-}
 {-# OPTIONS_GHC -fno-warn-unused-matches #-}
 {-# OPTIONS_GHC -fno-warn-unused-binds #-}
 {-# OPTIONS_GHC -fno-warn-unused-imports #-}
@@ -308,6 +309,10 @@ $tab+         { warn Opt_WarnTabs (text "Warning: Tab character") }
   \$ @varid / { ifExtension thEnabled }	{ skip_one_varid ITidEscape }
   "$("	    / { ifExtension thEnabled }	{ token ITparenEscape }
 
+-- For backward compatibility, accept the old dollar syntax
+  "[$" @varid "|"  / { ifExtension qqEnabled }
+                     { lex_quasiquote_tok }
+
   "[" @varid "|"  / { ifExtension qqEnabled }
                      { lex_quasiquote_tok }
 }