Add examples

.gitignore

@@ -85,3 +85,6 @@ bin/
 
 ### Mac OS ###
 .DS_Store
+
+### Generated files ###
+/gen/

generator/src/main/kotlin/org/ucfs/examples/AstGeneratorExample.kt

@@ -0,0 +1,26 @@
+package org.ucfs.examples
+
+import org.ucfs.ast.NodeClassesGenerator
+import org.ucfs.grammar.combinator.Grammar
+import org.ucfs.grammar.combinator.extension.StringExtension.times
+import org.ucfs.grammar.combinator.regexp.Epsilon
+import org.ucfs.grammar.combinator.regexp.Nt
+import org.ucfs.grammar.combinator.regexp.or
+import java.nio.file.Path
+
+class DyckGrammar: Grammar(){
+    var S by Nt()
+    var Round by Nt()
+    var Quadrat by Nt()
+    var Curly by Nt()
+    init{
+        setStart(S)
+        S = Round or Quadrat or Epsilon
+        Round = "(" * S * ")"
+        Quadrat = "[" * S * "]"
+        Curly = "{" * S * "}"
+    }
+}
+fun main(){
+    NodeClassesGenerator(DyckGrammar::class.java).generate(Path.of("gen"), "")
+}