"$m:_M" -> "_M": names used in Variables class should not be prefixed.

The prefix like "$m:" signifies type in WCCL, but in Variables code it comes from template argument; in this particular example, the <Match> type.

libwccl/parser/grammar.g

@@ -248,7 +248,7 @@ parse_match_rule
 	returns [boost::shared_ptr<Expression> ret_match]
 {
 	Variables vars;
-	vars.get_put<Match>("$m:_M");
+	vars.get_put<Match>("_M");
 }
 	: ret_match = match_rule_operator[tagset, vars] 
 ;
@@ -644,7 +644,7 @@ symset_operator
 	[const Corpus2::Tagset& tagset, Variables& vars]
 	returns [boost::shared_ptr<Function<TSet> > ret]
 	: ret = symset_condition [tagset, vars]
-	| (SYMBOL LBRACKET) => (ret = symset_getsymbol [tagset, vars])
+	| {LA(1)==SYMBOL && LA(2)==LBRACKET}? (ret = symset_getsymbol [tagset, vars])
 	| ret = symset_var_val [tagset, vars]
 	| ret = symset_class   [tagset, vars]
 	| ret = symset_range   [tagset, vars]
@@ -1718,7 +1718,7 @@ match_apply_operator
 	[const Corpus2::Tagset& tagset, Variables& vars]
 	returns [boost::shared_ptr<ApplyOperator> ret_op]
 {
-	VariableAccessor<Match> matches = vars.create_accessor<Match>("$m:_M");;
+	VariableAccessor<Match> matches = vars.create_accessor<Match>("_M");;
 	boost::shared_ptr<const MatchOperator> match_op;
 	boost::shared_ptr<std::vector<boost::shared_ptr<MatchAction> > > actions;
 	boost::shared_ptr<std::vector<boost::shared_ptr<Function<Bool> > > > conditions;