visitor added

Author: deviknitkkr

pom.xml

@@ -16,6 +16,8 @@
 		<project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
 		<maven.compiler.source>11</maven.compiler.source>
 		<maven.compiler.target>11</maven.compiler.target>
+		<antlr4.visitor>true</antlr4.visitor>
+            <antlr4.listener>true</antlr4.listener>
 	</properties>
 
 	<build>
@@ -58,6 +60,9 @@
 			    <groupId>org.antlr</groupId>
  			   <artifactId>antlr4-maven-plugin</artifactId>
   			  <version>4.7.1</version>
+  		  	<configuration>
+            		    <visitor>true</visitor>
+      		    </configuration>
    			 <executions>
      			   <execution>
     				       <goals>

src/main/java/Main.java

@@ -5,6 +5,9 @@
 import org.antlr.v4.runtime.CharStream;
 import org.antlr.v4.runtime.CommonTokenStream;
 
+import main.antlr4.TinyXLexer;
+import main.antlr4.TinyXParser;
+
 public class Main {
 
 	public static void main(String[] args) {

src/main/java/TinyXCustomListener.java

@@ -1,5 +1,8 @@
 import java.util.HashMap;
 
+import main.antlr4.TinyXBaseListener;
+import main.antlr4.TinyXParser;
+
 /**
  *
  * @author Shalitha Suranga
@@ -29,7 +32,6 @@ public void exitLet(TinyXParser.LetContext ctx) {
 	 	}
 	 	else
 	 	{
-	 		
 		 	this.variableMap.put(variableName, Integer.parseInt(value));
 	 	}
 	}