Added user-parser rule for parsing single rule

libwccl/parser/Parser.cpp

@@ -323,4 +323,35 @@ boost::shared_ptr<RuleSequence> Parser::parseRuleSequence(
 
 // ----------------------------------------------------------------------------
 
+/**
+ * @desc Parse single rule contained in a std::string. Converts the string
+ *       to a stream and calls parseSingleRule with it
+ * @arg str rule
+ * @return the parsed rule via a shared pointer
+ */
+boost::shared_ptr<Rule> Parser::parseSingleRule(
+		const std::string& str) const
+{
+	std::stringstream ss (std::stringstream::in | std::stringstream::out);
+	ss << str;
+
+	return this->parseSingleRule(ss);
+}
+
+/**
+ * @desc Parse a sequence rules. Runs parse_rule_sequence rule in the parser
+ *       grammar.
+ * @arg istr input stream with writed rules
+ * @return the parsed rule sequence via a shared pointer
+ */
+boost::shared_ptr<Rule> Parser::parseSingleRule(
+		std::istream& istr) const
+{
+	ANTLRLexer lexer(istr);
+	ANTLRParser parser(lexer);
+	return parser.parse_single_rule(tagset_);
+}
+
+// ----------------------------------------------------------------------------
+
 } // end Wccl ns

libwccl/parser/Parser.h

@@ -71,6 +71,13 @@ public:
 	boost::shared_ptr<RuleSequence>
 			parseRuleSequence(std::istream&) const;
 
+	// ---------------------------------------------------------------------------
+	// Parsing single rule from input string
+	boost::shared_ptr<Rule>
+			parseSingleRule(const std::string&) const;
+	boost::shared_ptr<Rule>
+			parseSingleRule(std::istream&) const;
+
 	// ---------------------------------------------------------------------------
 	const Corpus2::Tagset& tagset() const {
 		return tagset_;