Add lex() operator to parser grammar.

libwccl/parser/grammar.g

@@ -50,6 +50,7 @@ header {
 	#include <libwccl/ops/functions/strset/toupper.h>
 	#include <libwccl/ops/functions/strset/tolower.h>
 	#include <libwccl/ops/functions/strset/getlemmas.h>
+	#include <libwccl/ops/functions/strset/lextranslator.h>
 	
 	#include <libwccl/ops/functions/tset/agrfilter.h>
 	#include <libwccl/ops/functions/tset/catfilter.h>
@@ -975,6 +976,7 @@ strset_operator [ParsingScope& scope]
 	| ret = strset_affix     [scope] 
 	| ret = strset_var_val   [scope] 
 	| ret = strset_condition [scope]
+	| ret = strset_lex       [scope]
 	//
 	| LPAREN ret = strset_operator [scope] RPAREN
 ;
@@ -1086,6 +1088,22 @@ strset_condition
 		}
 ;
 
+strset_lex
+	[ParsingScope& scope]
+	returns [boost::shared_ptr<Function<StrSet> > op]
+{
+	boost::shared_ptr<Function<StrSet> > s;
+}
+	: "lex" LPAREN s = strset_operator [scope] COMMA name : STRING RPAREN 
+		{
+			op.reset(new LexTranslator(
+				s,
+				scope.lexicons().get_ptr(token_ref_to_std_string(name))));
+		}
+		exception catch [WcclError ex] {
+			throw ParserException(ex.what());
+		}
+;
 ///////////////////////////////////////////////////////////////////////////////
 // Bool operator 
 // Returns boost::shared_ptr<Function<Bool> >