Added Python3 Antlr Parser Demo

Author: tisoft

RSyntaxTextAreaDemo/src/main/java/org/fife/ui/rsyntaxtextarea/demo/DemoRootPane.java

@@ -36,6 +36,7 @@
 import org.fife.ui.rsyntaxtextarea.demo.antlr.MySqlTokenMaker;
 import org.fife.ui.rsyntaxtextarea.demo.antlr.MySqlAntlrParser;
 import org.fife.ui.rsyntaxtextarea.demo.antlr.Python3TokenMaker;
+import org.fife.ui.rsyntaxtextarea.demo.antlr.Python3AntlrParser;
 import org.fife.ui.rtextarea.Gutter;
 import org.fife.ui.rtextarea.RTextScrollPane;
 
@@ -78,6 +79,8 @@ public class DemoRootPane extends JRootPane implements HyperlinkListener,
 		parser.addParser("antlr/json", new JSONAntlrParser());
 		parser.addParser(SYNTAX_STYLE_SQL, new MySqlAntlrParser());
 		parser.addParser("antlr/mysql", new MySqlAntlrParser());
+		parser.addParser(SYNTAX_STYLE_PYTHON, new Python3AntlrParser());
+		parser.addParser("antlr/python", new Python3AntlrParser());
 
 		textArea = createTextArea();
 		setText("JavaExample.txt");

RSyntaxTextAreaDemo/src/main/java/org/fife/ui/rsyntaxtextarea/demo/antlr/Python3AntlrParser.java

@@ -0,0 +1,22 @@
+package org.fife.ui.rsyntaxtextarea.demo.antlr;
+
+import org.antlr.v4.runtime.CharStream;
+import org.antlr.v4.runtime.TokenStream;
+import org.fife.ui.rsyntaxtextarea.parser.antlr.AntlrParserBase;
+
+public class Python3AntlrParser extends AntlrParserBase<Python3Lexer, Python3Parser> {
+	@Override
+	protected Python3Lexer createLexer(CharStream input) {
+		return new Python3Lexer(input);
+	}
+
+	@Override
+	protected Python3Parser createParser(TokenStream input) {
+		return new Python3Parser(input);
+	}
+
+	@Override
+	protected void parse(Python3Parser parser) {
+		parser.file_input();
+	}
+}