Mavenized the project, removed Ant build file.

.gitignore

@@ -0,0 +1,3 @@
+*.iml
+.idea/
+target/

README.md

@@ -5,7 +5,7 @@ A small expression parser, using ANTLR 4. It supports most basic operators
 and `for`-, `while`- and `log`- (print) statements. It is just a basic
 demonstration of how to use the `-visitor` functionality of ANTLR 4.
 
-To run [the demo script](https://github.com/bkiers/Mu/blob/master/src/scripts/test.mu):
+To run [the demo script](https://github.com/bkiers/Mu/blob/master/src/main/mu/test.mu):
 
 ```
 n = 9;
@@ -28,7 +28,8 @@ do:
 
 ```
 git clone git://github.com/bkiers/Mu.git
-ant -e run
+mvn clean install
+mvn -q exec:java
 ```
 
 which will print the following to your console:

pom.xml

@@ -0,0 +1,80 @@
+<project xmlns="http://maven.apache.org/POM/4.0.0"
+         xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
+         xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/maven-v4_0_0.xsd">
+
+    <modelVersion>4.0.0</modelVersion>
+    <groupId>nl.big-o</groupId>
+    <artifactId>mu</artifactId>
+    <packaging>jar</packaging>
+    <version>0.1.1</version>
+    <name>mu</name>
+
+    <properties>
+        <antlr4.version>4.3</antlr4.version>
+        <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
+        <project.reporting.outputEncoding>UTF-8</project.reporting.outputEncoding>
+    </properties>
+
+    <dependencies>
+
+        <dependency>
+            <groupId>org.antlr</groupId>
+            <artifactId>antlr4-runtime</artifactId>
+            <version>${antlr4.version}</version>
+        </dependency>
+
+        <dependency>
+            <groupId>org.antlr</groupId>
+            <artifactId>antlr4-maven-plugin</artifactId>
+            <version>${antlr4.version}</version>
+            <scope>compile</scope>
+        </dependency>
+
+    </dependencies>
+
+    <build>
+
+        <plugins>
+
+            <plugin>
+                <groupId>org.antlr</groupId>
+                <artifactId>antlr4-maven-plugin</artifactId>
+                <version>${antlr4.version}</version>
+                <configuration>
+                    <arguments>
+                        <argument>-visitor</argument>
+                    </arguments>
+                </configuration>
+                <executions>
+                    <execution>
+                        <goals>
+                            <goal>antlr4</goal>
+                        </goals>
+                    </execution>
+                </executions>
+            </plugin>
+
+            <plugin>
+                <groupId>org.apache.maven.plugins</groupId>
+                <artifactId>maven-compiler-plugin</artifactId>
+                <version>3.1</version>
+                <configuration>
+                    <source>1.7</source>
+                    <target>1.7</target>
+                </configuration>
+            </plugin>
+
+            <plugin>
+                <groupId>org.codehaus.mojo</groupId>
+                <artifactId>exec-maven-plugin</artifactId>
+                <version>1.2.1</version>
+                <configuration>
+                    <mainClass>mu.Main</mainClass>
+                </configuration>
+            </plugin>
+
+        </plugins>
+
+    </build>
+
+</project>

src/grammar/Mu.g4 → src/main/antlr4/mu/Mu.g4

@@ -1,13 +1,5 @@
 grammar Mu;
 
-@parser::header {
-  package mu;                 
-}
-
-@lexer::header {
-  package mu;                 
-}
-
 parse
  : block EOF
  ;

src/main/mu/Main.java → src/main/java/mu/Main.java

@@ -9,6 +9,12 @@ public class Main {
 
     public static void main(String[] args) throws Exception {
 
+        if (args.length == 0) {
+            args = new String[]{"src/main/mu/test.mu"};
+        }
+
+        System.out.println("parsing: " + args[0]);
+
         MuLexer lexer = new MuLexer(new ANTLRFileStream(args[0]));
         MuParser parser = new MuParser(new CommonTokenStream(lexer));
         ParseTree tree = parser.parse();