diff --git a/src/main/antlr/Decaf.g4 b/src/main/antlr/Decaf.g4
index 350b9a3..733e6b8 100644
--- a/src/main/antlr/Decaf.g4
+++ b/src/main/antlr/Decaf.g4
@@ -38,8 +38,6 @@ expr : expr binaryOp expr   #BinaryOperation
     | '(' expr ')'          #Expression
     | fieldVarAccess               #Identifier
     | stmtexpr              #StatementExpressionexpr
-    | THIS                  #This
-    | NULL                  #Null
 ;
 
 binaryOp : ADD | SUB | MUL | GT | LT | GE | LE | EQ | NE | AND | OR;
diff --git a/src/main/java/de/maishai/ExpressionGenerator.java b/src/main/java/de/maishai/ExpressionGenerator.java
index 394978e..7cbee59 100644
--- a/src/main/java/de/maishai/ExpressionGenerator.java
+++ b/src/main/java/de/maishai/ExpressionGenerator.java
@@ -121,15 +121,6 @@ public class ExpressionGenerator extends DecafBaseVisitor<Expression> {
         return new New(type, args);
     }
 
-    @Override
-    public Expression visitNull(DecafParser.NullContext ctx){
-        return new Null();
-    }
-
-    @Override
-    public Expression visitThis(DecafParser.ThisContext ctx){
-        return new This();
-    }
 
     public static Expression generateRecursiveOwnerChain(List<DecafParser.RecipientContext> ctxList, FieldVarAccess recipient) {
         if (ctxList.isEmpty()) {
diff --git a/src/main/java/de/maishai/antlr/Decaf.interp b/src/main/java/de/maishai/antlr/Decaf.interp
index 0cc16ed..a3eb86d 100644
--- a/src/main/java/de/maishai/antlr/Decaf.interp
+++ b/src/main/java/de/maishai/antlr/Decaf.interp
@@ -131,4 +131,4 @@ id
 
 
 atn:
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12, 3, 12, 147, 8, 12, 1, 12, 1, 12, 1, 12, 1, 12, 1, 12, 1, 12, 1, 12, 1, 12, 1, 12, 1, 12, 1, 12, 1, 12, 1, 12, 1, 12, 1, 12, 1, 12, 1, 12, 1, 12, 1, 12, 1, 12, 1, 12, 1, 12, 1, 12, 3, 12, 172, 8, 12, 1, 12, 1, 12, 1, 12, 1, 12, 1, 12, 1, 12, 1, 12, 1, 12, 1, 12, 1, 12, 1, 12, 1, 12, 1, 12, 1, 12, 3, 12, 188, 8, 12, 1, 13, 1, 13, 1, 13, 1, 13, 1, 13, 3, 13, 195, 8, 13, 1, 13, 1, 13, 3, 13, 199, 8, 13, 1, 14, 1, 14, 1, 14, 1, 14, 1, 14, 1, 14, 1, 14, 1, 14, 1, 14, 1, 14, 1, 14, 1, 14, 1, 14, 3, 14, 214, 8, 14, 1, 14, 1, 14, 1, 14, 1, 14, 5, 14, 220, 8, 14, 10, 14, 12, 14, 223, 9, 14, 1, 15, 1, 15, 1, 16, 1, 16, 1, 17, 1, 17, 3, 17, 231, 8, 17, 1, 17, 1, 17, 1, 17, 5, 17, 236, 8, 17, 10, 17, 12, 17, 239, 9, 17, 1, 17, 1, 17, 1, 18, 1, 18, 1, 18, 1, 18, 1, 19, 1, 19, 3, 19, 249, 8, 19, 1, 19, 1, 19, 1, 19, 5, 19, 254, 8, 19, 10, 19, 12, 19, 257, 9, 19, 1, 19, 1, 19, 1, 20, 1, 20, 3, 20, 263, 8, 20, 1, 21, 1, 21, 1, 21, 3, 21, 268, 8, 21, 1, 21, 1, 21, 1, 22, 1, 22, 1, 22, 5, 22, 275, 8, 22, 10, 22, 12, 22, 278, 9, 22, 1, 23, 1, 23, 1, 24, 1, 24, 1, 24, 0, 1, 28, 25, 0, 2, 4, 6, 8, 10, 12, 14, 16, 18, 20, 22, 24, 26, 28, 30, 32, 34, 36, 38, 40, 42, 44, 46, 48, 0, 4, 1, 0, 34, 37, 1, 0, 23, 33, 2, 0, 23, 23, 38, 38, 2, 0, 43, 44, 46, 46, 298, 0, 50, 1, 0, 0, 0, 2, 68, 1, 0, 0, 0, 4, 74, 1, 0, 0, 0, 6, 78, 1, 0, 0, 0, 8, 82, 1, 0, 0, 0, 10, 88, 1, 0, 0, 0, 12, 90, 1, 0, 0, 0, 14, 100, 1, 0, 0, 0, 16, 109, 1, 0, 0, 0, 18, 118, 1, 0, 0, 0, 20, 126, 1, 0, 0, 0, 22, 129, 1, 0, 0, 0, 24, 187, 1, 0, 0, 0, 26, 198, 1, 0, 0, 0, 28, 213, 1, 0, 0, 0, 30, 224, 1, 0, 0, 0, 32, 226, 1, 0, 0, 0, 34, 230, 1, 0, 0, 0, 36, 242, 1, 0, 0, 0, 38, 248, 1, 0, 0, 0, 40, 262, 1, 0, 0, 0, 42, 264, 1, 0, 0, 0, 44, 271, 1, 0, 0, 0, 46, 279, 1, 0, 0, 0, 48, 281, 1, 0, 0, 0, 50, 51, 5, 19, 0, 0, 51, 52, 5, 1, 0, 0, 52, 53, 3, 48, 24, 0, 53, 55, 5, 2, 0, 0, 54, 56, 3, 14, 7, 0, 55, 54, 1, 0, 0, 0, 55, 56, 1, 0, 0, 0, 56, 62, 1, 0, 0, 0, 57, 61, 3, 2, 1, 0, 58, 61, 3, 12, 6, 0, 59, 61, 3, 16, 8, 0, 60, 57, 1, 0, 0, 0, 60, 58, 1, 0, 0, 0, 60, 59, 1, 0, 0, 0, 61, 64, 1, 0, 0, 0, 62, 60, 1, 0, 0, 0, 62, 63, 1, 0, 0, 0, 63, 65, 1, 0, 0, 0, 64, 62, 1, 0, 0, 0, 65, 66, 5, 3, 0, 0, 66, 1, 1, 0, 0, 0, 67, 69, 5, 19, 0, 0, 68, 67, 1, 0, 0, 0, 68, 69, 1, 0, 0, 0, 69, 70, 1, 0, 0, 0, 70, 71, 3, 10, 5, 0, 71, 72, 3, 48, 24, 0, 72, 73, 5, 4, 0, 0, 73, 3, 1, 0, 0, 0, 74, 75, 3, 10, 5, 0, 75, 76, 3, 48, 24, 0, 76, 77, 5, 4, 0, 0, 77, 5, 1, 0, 0, 0, 78, 79, 7, 0, 0, 0, 79, 7, 1, 0, 0, 0, 80, 83, 3, 10, 5, 0, 81, 83, 5, 41, 0, 0, 82, 80, 1, 0, 0, 0, 82, 81, 1, 0, 0, 0, 83, 9, 1, 0, 0, 0, 84, 89, 5, 39, 0, 0, 85, 89, 5, 40, 0, 0, 86, 89, 5, 42, 0, 0, 87, 89, 3, 48, 24, 0, 88, 84, 1, 0, 0, 0, 88, 85, 1, 0, 0, 0, 88, 86, 1, 0, 0, 0, 88, 87, 1, 0, 0, 0, 89, 11, 1, 0, 0, 0, 90, 91, 5, 19, 0, 0, 91, 92, 3, 8, 4, 0, 92, 93, 3, 48, 24, 0, 93, 95, 5, 5, 0, 0, 94, 96, 3, 18, 9, 0, 95, 94, 1, 0, 0, 0, 95, 96, 1, 0, 0, 0, 96, 97, 1, 0, 0, 0, 97, 98, 5, 6, 0, 0, 98, 99, 3, 22, 11, 0, 99, 13, 1, 0, 0, 0, 100, 101, 5, 19, 0, 0, 101, 102, 5, 7, 0, 0, 102, 103, 5, 41, 0, 0, 103, 104, 5, 8, 0, 0, 104, 105, 5, 5, 0, 0, 105, 106, 5, 9, 0, 0, 106, 107, 5, 6, 0, 0, 107, 108, 3, 22, 11, 0, 108, 15, 1, 0, 0, 0, 109, 110, 5, 19, 0, 0, 110, 111, 3, 48, 24, 0, 111, 113, 5, 5, 0, 0, 112, 114, 3, 18, 9, 0, 113, 112, 1, 0, 0, 0, 113, 114, 1, 0, 0, 0, 114, 115, 1, 0, 0, 0, 115, 116, 5, 6, 0, 0, 116, 117, 3, 22, 11, 0, 117, 17, 1, 0, 0, 0, 118, 123, 3, 20, 10, 0, 119, 120, 5, 10, 0, 0, 120, 122, 3, 20, 10, 0, 121, 119, 1, 0, 0, 0, 122, 125, 1, 0, 0, 0, 123, 121, 1, 0, 0, 0, 123, 124, 1, 0, 0, 0, 124, 19, 1, 0, 0, 0, 125, 123, 1, 0, 0, 0, 126, 127, 3, 10, 5, 0, 127, 128, 3, 48, 24, 0, 128, 21, 1, 0, 0, 0, 129, 134, 5, 2, 0, 0, 130, 133, 3, 4, 2, 0, 131, 133, 3, 24, 12, 0, 132, 130, 1, 0, 0, 0, 132, 131, 1, 0, 0, 0, 133, 136, 1, 0, 0, 0, 134, 132, 1, 0, 0, 0, 134, 135, 1, 0, 0, 0, 135, 137, 1, 0, 0, 0, 136, 134, 1, 0, 0, 0, 137, 138, 5, 3, 0, 0, 138, 23, 1, 0, 0, 0, 139, 140, 5, 11, 0, 0, 140, 141, 5, 5, 0, 0, 141, 142, 3, 28, 14, 0, 142, 143, 5, 6, 0, 0, 143, 146, 3, 22, 11, 0, 144, 145, 5, 12, 0, 0, 145, 147, 3, 22, 11, 0, 146, 144, 1, 0, 0, 0, 146, 147, 1, 0, 0, 0, 147, 188, 1, 0, 0, 0, 148, 149, 5, 13, 0, 0, 149, 150, 5, 5, 0, 0, 150, 151, 3, 36, 18, 0, 151, 152, 5, 4, 0, 0, 152, 153, 3, 28, 14, 0, 153, 154, 5, 4, 0, 0, 154, 155, 3, 36, 18, 0, 155, 156, 5, 6, 0, 0, 156, 157, 3, 22, 11, 0, 157, 188, 1, 0, 0, 0, 158, 159, 5, 14, 0, 0, 159, 160, 5, 5, 0, 0, 160, 161, 3, 28, 14, 0, 161, 162, 5, 6, 0, 0, 162, 163, 3, 22, 11, 0, 163, 188, 1, 0, 0, 0, 164, 165, 5, 15, 0, 0, 165, 166, 3, 22, 11, 0, 166, 167, 5, 14, 0, 0, 167, 168, 5, 5, 0, 0, 168, 169, 3, 28, 14, 0, 169, 171, 5, 6, 0, 0, 170, 172, 5, 4, 0, 0, 171, 170, 1, 0, 0, 0, 171, 172, 1, 0, 0, 0, 172, 188, 1, 0, 0, 0, 173, 174, 5, 16, 0, 0, 174, 175, 3, 28, 14, 0, 175, 176, 5, 4, 0, 0, 176, 188, 1, 0, 0, 0, 177, 178, 5, 16, 0, 0, 178, 188, 5, 4, 0, 0, 179, 180, 5, 17, 0, 0, 180, 188, 5, 4, 0, 0, 181, 182, 3, 36, 18, 0, 182, 183, 5, 4, 0, 0, 183, 188, 1, 0, 0, 0, 184, 185, 3, 26, 13, 0, 185, 186, 5, 4, 0, 0, 186, 188, 1, 0, 0, 0, 187, 139, 1, 0, 0, 0, 187, 148, 1, 0, 0, 0, 187, 158, 1, 0, 0, 0, 187, 164, 1, 0, 0, 0, 187, 173, 1, 0, 0, 0, 187, 177, 1, 0, 0, 0, 187, 179, 1, 0, 0, 0, 187, 181, 1, 0, 0, 0, 187, 184, 1, 0, 0, 0, 188, 25, 1, 0, 0, 0, 189, 199, 3, 38, 19, 0, 190, 191, 5, 20, 0, 0, 191, 192, 3, 10, 5, 0, 192, 194, 5, 5, 0, 0, 193, 195, 3, 44, 22, 0, 194, 193, 1, 0, 0, 0, 194, 195, 1, 0, 0, 0, 195, 196, 1, 0, 0, 0, 196, 197, 5, 6, 0, 0, 197, 199, 1, 0, 0, 0, 198, 189, 1, 0, 0, 0, 198, 190, 1, 0, 0, 0, 199, 27, 1, 0, 0, 0, 200, 201, 6, 14, -1, 0, 201, 202, 3, 32, 16, 0, 202, 203, 3, 28, 14, 7, 203, 214, 1, 0, 0, 0, 204, 214, 3, 46, 23, 0, 205, 206, 5, 5, 0, 0, 206, 207, 3, 28, 14, 0, 207, 208, 5, 6, 0, 0, 208, 214, 1, 0, 0, 0, 209, 214, 3, 34, 17, 0, 210, 214, 3, 26, 13, 0, 211, 214, 5, 22, 0, 0, 212, 214, 5, 21, 0, 0, 213, 200, 1, 0, 0, 0, 213, 204, 1, 0, 0, 0, 213, 205, 1, 0, 0, 0, 213, 209, 1, 0, 0, 0, 213, 210, 1, 0, 0, 0, 213, 211, 1, 0, 0, 0, 213, 212, 1, 0, 0, 0, 214, 221, 1, 0, 0, 0, 215, 216, 10, 8, 0, 0, 216, 217, 3, 30, 15, 0, 217, 218, 3, 28, 14, 9, 218, 220, 1, 0, 0, 0, 219, 215, 1, 0, 0, 0, 220, 223, 1, 0, 0, 0, 221, 219, 1, 0, 0, 0, 221, 222, 1, 0, 0, 0, 222, 29, 1, 0, 0, 0, 223, 221, 1, 0, 0, 0, 224, 225, 7, 1, 0, 0, 225, 31, 1, 0, 0, 0, 226, 227, 7, 2, 0, 0, 227, 33, 1, 0, 0, 0, 228, 229, 5, 22, 0, 0, 229, 231, 5, 18, 0, 0, 230, 228, 1, 0, 0, 0, 230, 231, 1, 0, 0, 0, 231, 237, 1, 0, 0, 0, 232, 233, 3, 40, 20, 0, 233, 234, 5, 18, 0, 0, 234, 236, 1, 0, 0, 0, 235, 232, 1, 0, 0, 0, 236, 239, 1, 0, 0, 0, 237, 235, 1, 0, 0, 0, 237, 238, 1, 0, 0, 0, 238, 240, 1, 0, 0, 0, 239, 237, 1, 0, 0, 0, 240, 241, 3, 48, 24, 0, 241, 35, 1, 0, 0, 0, 242, 243, 3, 34, 17, 0, 243, 244, 3, 6, 3, 0, 244, 245, 3, 28, 14, 0, 245, 37, 1, 0, 0, 0, 246, 247, 5, 22, 0, 0, 247, 249, 5, 18, 0, 0, 248, 246, 1, 0, 0, 0, 248, 249, 1, 0, 0, 0, 249, 255, 1, 0, 0, 0, 250, 251, 3, 40, 20, 0, 251, 252, 5, 18, 0, 0, 252, 254, 1, 0, 0, 0, 253, 250, 1, 0, 0, 0, 254, 257, 1, 0, 0, 0, 255, 253, 1, 0, 0, 0, 255, 256, 1, 0, 0, 0, 256, 258, 1, 0, 0, 0, 257, 255, 1, 0, 0, 0, 258, 259, 3, 42, 21, 0, 259, 39, 1, 0, 0, 0, 260, 263, 3, 42, 21, 0, 261, 263, 3, 48, 24, 0, 262, 260, 1, 0, 0, 0, 262, 261, 1, 0, 0, 0, 263, 41, 1, 0, 0, 0, 264, 265, 3, 48, 24, 0, 265, 267, 5, 5, 0, 0, 266, 268, 3, 44, 22, 0, 267, 266, 1, 0, 0, 0, 267, 268, 1, 0, 0, 0, 268, 269, 1, 0, 0, 0, 269, 270, 5, 6, 0, 0, 270, 43, 1, 0, 0, 0, 271, 276, 3, 28, 14, 0, 272, 273, 5, 10, 0, 0, 273, 275, 3, 28, 14, 0, 274, 272, 1, 0, 0, 0, 275, 278, 1, 0, 0, 0, 276, 274, 1, 0, 0, 0, 276, 277, 1, 0, 0, 0, 277, 45, 1, 0, 0, 0, 278, 276, 1, 0, 0, 0, 279, 280, 7, 3, 0, 0, 280, 47, 1, 0, 0, 0, 281, 282, 5, 45, 0, 0, 282, 49, 1, 0, 0, 0, 25, 55, 60, 62, 68, 82, 88, 95, 113, 123, 132, 134, 146, 171, 187, 194, 198, 213, 221, 230, 237, 248, 255, 262, 267, 276]
\ No newline at end of file
+[4, 1, 49, 282, 2, 0, 7, 0, 2, 1, 7, 1, 2, 2, 7, 2, 2, 3, 7, 3, 2, 4, 7, 4, 2, 5, 7, 5, 2, 6, 7, 6, 2, 7, 7, 7, 2, 8, 7, 8, 2, 9, 7, 9, 2, 10, 7, 10, 2, 11, 7, 11, 2, 12, 7, 12, 2, 13, 7, 13, 2, 14, 7, 14, 2, 15, 7, 15, 2, 16, 7, 16, 2, 17, 7, 17, 2, 18, 7, 18, 2, 19, 7, 19, 2, 20, 7, 20, 2, 21, 7, 21, 2, 22, 7, 22, 2, 23, 7, 23, 2, 24, 7, 24, 1, 0, 1, 0, 1, 0, 1, 0, 1, 0, 3, 0, 56, 8, 0, 1, 0, 1, 0, 1, 0, 5, 0, 61, 8, 0, 10, 0, 12, 0, 64, 9, 0, 1, 0, 1, 0, 1, 1, 3, 1, 69, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 2, 1, 2, 1, 2, 1, 2, 1, 3, 1, 3, 1, 4, 1, 4, 3, 4, 83, 8, 4, 1, 5, 1, 5, 1, 5, 1, 5, 3, 5, 89, 8, 5, 1, 6, 1, 6, 1, 6, 1, 6, 1, 6, 3, 6, 96, 8, 6, 1, 6, 1, 6, 1, 6, 1, 7, 1, 7, 1, 7, 1, 7, 1, 7, 1, 7, 1, 7, 1, 7, 1, 7, 1, 8, 1, 8, 1, 8, 1, 8, 3, 8, 114, 8, 8, 1, 8, 1, 8, 1, 8, 1, 9, 1, 9, 1, 9, 5, 9, 122, 8, 9, 10, 9, 12, 9, 125, 9, 9, 1, 10, 1, 10, 1, 10, 1, 11, 1, 11, 1, 11, 5, 11, 133, 8, 11, 10, 11, 12, 11, 136, 9, 11, 1, 11, 1, 11, 1, 12, 1, 12, 1, 12, 1, 12, 1, 12, 1, 12, 1, 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12, 22, 276, 9, 22, 1, 23, 1, 23, 1, 24, 1, 24, 1, 24, 0, 1, 28, 25, 0, 2, 4, 6, 8, 10, 12, 14, 16, 18, 20, 22, 24, 26, 28, 30, 32, 34, 36, 38, 40, 42, 44, 46, 48, 0, 4, 1, 0, 34, 37, 1, 0, 23, 33, 2, 0, 23, 23, 38, 38, 2, 0, 43, 44, 46, 46, 294, 0, 50, 1, 0, 0, 0, 2, 68, 1, 0, 0, 0, 4, 74, 1, 0, 0, 0, 6, 78, 1, 0, 0, 0, 8, 82, 1, 0, 0, 0, 10, 88, 1, 0, 0, 0, 12, 90, 1, 0, 0, 0, 14, 100, 1, 0, 0, 0, 16, 109, 1, 0, 0, 0, 18, 118, 1, 0, 0, 0, 20, 126, 1, 0, 0, 0, 22, 129, 1, 0, 0, 0, 24, 187, 1, 0, 0, 0, 26, 198, 1, 0, 0, 0, 28, 211, 1, 0, 0, 0, 30, 222, 1, 0, 0, 0, 32, 224, 1, 0, 0, 0, 34, 228, 1, 0, 0, 0, 36, 240, 1, 0, 0, 0, 38, 246, 1, 0, 0, 0, 40, 260, 1, 0, 0, 0, 42, 262, 1, 0, 0, 0, 44, 269, 1, 0, 0, 0, 46, 277, 1, 0, 0, 0, 48, 279, 1, 0, 0, 0, 50, 51, 5, 19, 0, 0, 51, 52, 5, 1, 0, 0, 52, 53, 3, 48, 24, 0, 53, 55, 5, 2, 0, 0, 54, 56, 3, 14, 7, 0, 55, 54, 1, 0, 0, 0, 55, 56, 1, 0, 0, 0, 56, 62, 1, 0, 0, 0, 57, 61, 3, 2, 1, 0, 58, 61, 3, 12, 6, 0, 59, 61, 3, 16, 8, 0, 60, 57, 1, 0, 0, 0, 60, 58, 1, 0, 0, 0, 60, 59, 1, 0, 0, 0, 61, 64, 1, 0, 0, 0, 62, 60, 1, 0, 0, 0, 62, 63, 1, 0, 0, 0, 63, 65, 1, 0, 0, 0, 64, 62, 1, 0, 0, 0, 65, 66, 5, 3, 0, 0, 66, 1, 1, 0, 0, 0, 67, 69, 5, 19, 0, 0, 68, 67, 1, 0, 0, 0, 68, 69, 1, 0, 0, 0, 69, 70, 1, 0, 0, 0, 70, 71, 3, 10, 5, 0, 71, 72, 3, 48, 24, 0, 72, 73, 5, 4, 0, 0, 73, 3, 1, 0, 0, 0, 74, 75, 3, 10, 5, 0, 75, 76, 3, 48, 24, 0, 76, 77, 5, 4, 0, 0, 77, 5, 1, 0, 0, 0, 78, 79, 7, 0, 0, 0, 79, 7, 1, 0, 0, 0, 80, 83, 3, 10, 5, 0, 81, 83, 5, 41, 0, 0, 82, 80, 1, 0, 0, 0, 82, 81, 1, 0, 0, 0, 83, 9, 1, 0, 0, 0, 84, 89, 5, 39, 0, 0, 85, 89, 5, 40, 0, 0, 86, 89, 5, 42, 0, 0, 87, 89, 3, 48, 24, 0, 88, 84, 1, 0, 0, 0, 88, 85, 1, 0, 0, 0, 88, 86, 1, 0, 0, 0, 88, 87, 1, 0, 0, 0, 89, 11, 1, 0, 0, 0, 90, 91, 5, 19, 0, 0, 91, 92, 3, 8, 4, 0, 92, 93, 3, 48, 24, 0, 93, 95, 5, 5, 0, 0, 94, 96, 3, 18, 9, 0, 95, 94, 1, 0, 0, 0, 95, 96, 1, 0, 0, 0, 96, 97, 1, 0, 0, 0, 97, 98, 5, 6, 0, 0, 98, 99, 3, 22, 11, 0, 99, 13, 1, 0, 0, 0, 100, 101, 5, 19, 0, 0, 101, 102, 5, 7, 0, 0, 102, 103, 5, 41, 0, 0, 103, 104, 5, 8, 0, 0, 104, 105, 5, 5, 0, 0, 105, 106, 5, 9, 0, 0, 106, 107, 5, 6, 0, 0, 107, 108, 3, 22, 11, 0, 108, 15, 1, 0, 0, 0, 109, 110, 5, 19, 0, 0, 110, 111, 3, 48, 24, 0, 111, 113, 5, 5, 0, 0, 112, 114, 3, 18, 9, 0, 113, 112, 1, 0, 0, 0, 113, 114, 1, 0, 0, 0, 114, 115, 1, 0, 0, 0, 115, 116, 5, 6, 0, 0, 116, 117, 3, 22, 11, 0, 117, 17, 1, 0, 0, 0, 118, 123, 3, 20, 10, 0, 119, 120, 5, 10, 0, 0, 120, 122, 3, 20, 10, 0, 121, 119, 1, 0, 0, 0, 122, 125, 1, 0, 0, 0, 123, 121, 1, 0, 0, 0, 123, 124, 1, 0, 0, 0, 124, 19, 1, 0, 0, 0, 125, 123, 1, 0, 0, 0, 126, 127, 3, 10, 5, 0, 127, 128, 3, 48, 24, 0, 128, 21, 1, 0, 0, 0, 129, 134, 5, 2, 0, 0, 130, 133, 3, 4, 2, 0, 131, 133, 3, 24, 12, 0, 132, 130, 1, 0, 0, 0, 132, 131, 1, 0, 0, 0, 133, 136, 1, 0, 0, 0, 134, 132, 1, 0, 0, 0, 134, 135, 1, 0, 0, 0, 135, 137, 1, 0, 0, 0, 136, 134, 1, 0, 0, 0, 137, 138, 5, 3, 0, 0, 138, 23, 1, 0, 0, 0, 139, 140, 5, 11, 0, 0, 140, 141, 5, 5, 0, 0, 141, 142, 3, 28, 14, 0, 142, 143, 5, 6, 0, 0, 143, 146, 3, 22, 11, 0, 144, 145, 5, 12, 0, 0, 145, 147, 3, 22, 11, 0, 146, 144, 1, 0, 0, 0, 146, 147, 1, 0, 0, 0, 147, 188, 1, 0, 0, 0, 148, 149, 5, 13, 0, 0, 149, 150, 5, 5, 0, 0, 150, 151, 3, 36, 18, 0, 151, 152, 5, 4, 0, 0, 152, 153, 3, 28, 14, 0, 153, 154, 5, 4, 0, 0, 154, 155, 3, 36, 18, 0, 155, 156, 5, 6, 0, 0, 156, 157, 3, 22, 11, 0, 157, 188, 1, 0, 0, 0, 158, 159, 5, 14, 0, 0, 159, 160, 5, 5, 0, 0, 160, 161, 3, 28, 14, 0, 161, 162, 5, 6, 0, 0, 162, 163, 3, 22, 11, 0, 163, 188, 1, 0, 0, 0, 164, 165, 5, 15, 0, 0, 165, 166, 3, 22, 11, 0, 166, 167, 5, 14, 0, 0, 167, 168, 5, 5, 0, 0, 168, 169, 3, 28, 14, 0, 169, 171, 5, 6, 0, 0, 170, 172, 5, 4, 0, 0, 171, 170, 1, 0, 0, 0, 171, 172, 1, 0, 0, 0, 172, 188, 1, 0, 0, 0, 173, 174, 5, 16, 0, 0, 174, 175, 3, 28, 14, 0, 175, 176, 5, 4, 0, 0, 176, 188, 1, 0, 0, 0, 177, 178, 5, 16, 0, 0, 178, 188, 5, 4, 0, 0, 179, 180, 5, 17, 0, 0, 180, 188, 5, 4, 0, 0, 181, 182, 3, 36, 18, 0, 182, 183, 5, 4, 0, 0, 183, 188, 1, 0, 0, 0, 184, 185, 3, 26, 13, 0, 185, 186, 5, 4, 0, 0, 186, 188, 1, 0, 0, 0, 187, 139, 1, 0, 0, 0, 187, 148, 1, 0, 0, 0, 187, 158, 1, 0, 0, 0, 187, 164, 1, 0, 0, 0, 187, 173, 1, 0, 0, 0, 187, 177, 1, 0, 0, 0, 187, 179, 1, 0, 0, 0, 187, 181, 1, 0, 0, 0, 187, 184, 1, 0, 0, 0, 188, 25, 1, 0, 0, 0, 189, 199, 3, 38, 19, 0, 190, 191, 5, 20, 0, 0, 191, 192, 3, 10, 5, 0, 192, 194, 5, 5, 0, 0, 193, 195, 3, 44, 22, 0, 194, 193, 1, 0, 0, 0, 194, 195, 1, 0, 0, 0, 195, 196, 1, 0, 0, 0, 196, 197, 5, 6, 0, 0, 197, 199, 1, 0, 0, 0, 198, 189, 1, 0, 0, 0, 198, 190, 1, 0, 0, 0, 199, 27, 1, 0, 0, 0, 200, 201, 6, 14, -1, 0, 201, 202, 3, 32, 16, 0, 202, 203, 3, 28, 14, 5, 203, 212, 1, 0, 0, 0, 204, 212, 3, 46, 23, 0, 205, 206, 5, 5, 0, 0, 206, 207, 3, 28, 14, 0, 207, 208, 5, 6, 0, 0, 208, 212, 1, 0, 0, 0, 209, 212, 3, 34, 17, 0, 210, 212, 3, 26, 13, 0, 211, 200, 1, 0, 0, 0, 211, 204, 1, 0, 0, 0, 211, 205, 1, 0, 0, 0, 211, 209, 1, 0, 0, 0, 211, 210, 1, 0, 0, 0, 212, 219, 1, 0, 0, 0, 213, 214, 10, 6, 0, 0, 214, 215, 3, 30, 15, 0, 215, 216, 3, 28, 14, 7, 216, 218, 1, 0, 0, 0, 217, 213, 1, 0, 0, 0, 218, 221, 1, 0, 0, 0, 219, 217, 1, 0, 0, 0, 219, 220, 1, 0, 0, 0, 220, 29, 1, 0, 0, 0, 221, 219, 1, 0, 0, 0, 222, 223, 7, 1, 0, 0, 223, 31, 1, 0, 0, 0, 224, 225, 7, 2, 0, 0, 225, 33, 1, 0, 0, 0, 226, 227, 5, 22, 0, 0, 227, 229, 5, 18, 0, 0, 228, 226, 1, 0, 0, 0, 228, 229, 1, 0, 0, 0, 229, 235, 1, 0, 0, 0, 230, 231, 3, 40, 20, 0, 231, 232, 5, 18, 0, 0, 232, 234, 1, 0, 0, 0, 233, 230, 1, 0, 0, 0, 234, 237, 1, 0, 0, 0, 235, 233, 1, 0, 0, 0, 235, 236, 1, 0, 0, 0, 236, 238, 1, 0, 0, 0, 237, 235, 1, 0, 0, 0, 238, 239, 3, 48, 24, 0, 239, 35, 1, 0, 0, 0, 240, 241, 3, 34, 17, 0, 241, 242, 3, 6, 3, 0, 242, 243, 3, 28, 14, 0, 243, 37, 1, 0, 0, 0, 244, 245, 5, 22, 0, 0, 245, 247, 5, 18, 0, 0, 246, 244, 1, 0, 0, 0, 246, 247, 1, 0, 0, 0, 247, 253, 1, 0, 0, 0, 248, 249, 3, 40, 20, 0, 249, 250, 5, 18, 0, 0, 250, 252, 1, 0, 0, 0, 251, 248, 1, 0, 0, 0, 252, 255, 1, 0, 0, 0, 253, 251, 1, 0, 0, 0, 253, 254, 1, 0, 0, 0, 254, 256, 1, 0, 0, 0, 255, 253, 1, 0, 0, 0, 256, 257, 3, 42, 21, 0, 257, 39, 1, 0, 0, 0, 258, 261, 3, 42, 21, 0, 259, 261, 3, 48, 24, 0, 260, 258, 1, 0, 0, 0, 260, 259, 1, 0, 0, 0, 261, 41, 1, 0, 0, 0, 262, 263, 3, 48, 24, 0, 263, 265, 5, 5, 0, 0, 264, 266, 3, 44, 22, 0, 265, 264, 1, 0, 0, 0, 265, 266, 1, 0, 0, 0, 266, 267, 1, 0, 0, 0, 267, 268, 5, 6, 0, 0, 268, 43, 1, 0, 0, 0, 269, 274, 3, 28, 14, 0, 270, 271, 5, 10, 0, 0, 271, 273, 3, 28, 14, 0, 272, 270, 1, 0, 0, 0, 273, 276, 1, 0, 0, 0, 274, 272, 1, 0, 0, 0, 274, 275, 1, 0, 0, 0, 275, 45, 1, 0, 0, 0, 276, 274, 1, 0, 0, 0, 277, 278, 7, 3, 0, 0, 278, 47, 1, 0, 0, 0, 279, 280, 5, 45, 0, 0, 280, 49, 1, 0, 0, 0, 25, 55, 60, 62, 68, 82, 88, 95, 113, 123, 132, 134, 146, 171, 187, 194, 198, 211, 219, 228, 235, 246, 253, 260, 265, 274]
\ No newline at end of file
diff --git a/src/main/java/de/maishai/antlr/DecafBaseListener.java b/src/main/java/de/maishai/antlr/DecafBaseListener.java
index 6c5611b..75aecd2 100644
--- a/src/main/java/de/maishai/antlr/DecafBaseListener.java
+++ b/src/main/java/de/maishai/antlr/DecafBaseListener.java
@@ -288,18 +288,6 @@ public class DecafBaseListener implements DecafListener {
 	 * <p>The default implementation does nothing.</p>
 	 */
 	@Override public void exitNew(DecafParser.NewContext ctx) { }
-	/**
-	 * {@inheritDoc}
-	 *
-	 * <p>The default implementation does nothing.</p>
-	 */
-	@Override public void enterNull(DecafParser.NullContext ctx) { }
-	/**
-	 * {@inheritDoc}
-	 *
-	 * <p>The default implementation does nothing.</p>
-	 */
-	@Override public void exitNull(DecafParser.NullContext ctx) { }
 	/**
 	 * {@inheritDoc}
 	 *
@@ -360,18 +348,6 @@ public class DecafBaseListener implements DecafListener {
 	 * <p>The default implementation does nothing.</p>
 	 */
 	@Override public void exitBinaryOperation(DecafParser.BinaryOperationContext ctx) { }
-	/**
-	 * {@inheritDoc}
-	 *
-	 * <p>The default implementation does nothing.</p>
-	 */
-	@Override public void enterThis(DecafParser.ThisContext ctx) { }
-	/**
-	 * {@inheritDoc}
-	 *
-	 * <p>The default implementation does nothing.</p>
-	 */
-	@Override public void exitThis(DecafParser.ThisContext ctx) { }
 	/**
 	 * {@inheritDoc}
 	 *
diff --git a/src/main/java/de/maishai/antlr/DecafBaseVisitor.java b/src/main/java/de/maishai/antlr/DecafBaseVisitor.java
index 4969a22..4931c04 100644
--- a/src/main/java/de/maishai/antlr/DecafBaseVisitor.java
+++ b/src/main/java/de/maishai/antlr/DecafBaseVisitor.java
@@ -173,13 +173,6 @@ public class DecafBaseVisitor<T> extends AbstractParseTreeVisitor<T> implements
 	 * {@link #visitChildren} on {@code ctx}.</p>
 	 */
 	@Override public T visitNew(DecafParser.NewContext ctx) { return visitChildren(ctx); }
-	/**
-	 * {@inheritDoc}
-	 *
-	 * <p>The default implementation returns the result of calling
-	 * {@link #visitChildren} on {@code ctx}.</p>
-	 */
-	@Override public T visitNull(DecafParser.NullContext ctx) { return visitChildren(ctx); }
 	/**
 	 * {@inheritDoc}
 	 *
@@ -215,13 +208,6 @@ public class DecafBaseVisitor<T> extends AbstractParseTreeVisitor<T> implements
 	 * {@link #visitChildren} on {@code ctx}.</p>
 	 */
 	@Override public T visitBinaryOperation(DecafParser.BinaryOperationContext ctx) { return visitChildren(ctx); }
-	/**
-	 * {@inheritDoc}
-	 *
-	 * <p>The default implementation returns the result of calling
-	 * {@link #visitChildren} on {@code ctx}.</p>
-	 */
-	@Override public T visitThis(DecafParser.ThisContext ctx) { return visitChildren(ctx); }
 	/**
 	 * {@inheritDoc}
 	 *
diff --git a/src/main/java/de/maishai/antlr/DecafListener.java b/src/main/java/de/maishai/antlr/DecafListener.java
index 60dce28..e4a1bde 100644
--- a/src/main/java/de/maishai/antlr/DecafListener.java
+++ b/src/main/java/de/maishai/antlr/DecafListener.java
@@ -259,18 +259,6 @@ public interface DecafListener extends ParseTreeListener {
 	 * @param ctx the parse tree
 	 */
 	void exitNew(DecafParser.NewContext ctx);
-	/**
-	 * Enter a parse tree produced by the {@code Null}
-	 * labeled alternative in {@link DecafParser#expr}.
-	 * @param ctx the parse tree
-	 */
-	void enterNull(DecafParser.NullContext ctx);
-	/**
-	 * Exit a parse tree produced by the {@code Null}
-	 * labeled alternative in {@link DecafParser#expr}.
-	 * @param ctx the parse tree
-	 */
-	void exitNull(DecafParser.NullContext ctx);
 	/**
 	 * Enter a parse tree produced by the {@code UnaryOperation}
 	 * labeled alternative in {@link DecafParser#expr}.
@@ -331,18 +319,6 @@ public interface DecafListener extends ParseTreeListener {
 	 * @param ctx the parse tree
 	 */
 	void exitBinaryOperation(DecafParser.BinaryOperationContext ctx);
-	/**
-	 * Enter a parse tree produced by the {@code This}
-	 * labeled alternative in {@link DecafParser#expr}.
-	 * @param ctx the parse tree
-	 */
-	void enterThis(DecafParser.ThisContext ctx);
-	/**
-	 * Exit a parse tree produced by the {@code This}
-	 * labeled alternative in {@link DecafParser#expr}.
-	 * @param ctx the parse tree
-	 */
-	void exitThis(DecafParser.ThisContext ctx);
 	/**
 	 * Enter a parse tree produced by the {@code StatementExpressionexpr}
 	 * labeled alternative in {@link DecafParser#expr}.
diff --git a/src/main/java/de/maishai/antlr/DecafParser.java b/src/main/java/de/maishai/antlr/DecafParser.java
index c08644c..3ec3cff 100644
--- a/src/main/java/de/maishai/antlr/DecafParser.java
+++ b/src/main/java/de/maishai/antlr/DecafParser.java
@@ -1414,7 +1414,7 @@ public class DecafParser extends Parser {
 				setState(194);
 				_errHandler.sync(this);
 				_la = _input.LA(1);
-				if ((((_la) & ~0x3f) == 0 && ((1L << _la) & 132216288968736L) != 0)) {
+				if ((((_la) & ~0x3f) == 0 && ((1L << _la) & 132216286871584L) != 0)) {
 					{
 					setState(193);
 					args();
@@ -1453,24 +1453,6 @@ public class DecafParser extends Parser {
 		}
 	}
 	@SuppressWarnings("CheckReturnValue")
-	public static class NullContext extends ExprContext {
-		public TerminalNode NULL() { return getToken(DecafParser.NULL, 0); }
-		public NullContext(ExprContext ctx) { copyFrom(ctx); }
-		@Override
-		public void enterRule(ParseTreeListener listener) {
-			if ( listener instanceof DecafListener ) ((DecafListener)listener).enterNull(this);
-		}
-		@Override
-		public void exitRule(ParseTreeListener listener) {
-			if ( listener instanceof DecafListener ) ((DecafListener)listener).exitNull(this);
-		}
-		@Override
-		public <T> T accept(ParseTreeVisitor<? extends T> visitor) {
-			if ( visitor instanceof DecafVisitor ) return ((DecafVisitor<? extends T>)visitor).visitNull(this);
-			else return visitor.visitChildren(this);
-		}
-	}
-	@SuppressWarnings("CheckReturnValue")
 	public static class UnaryOperationContext extends ExprContext {
 		public UnaryOpContext unaryOp() {
 			return getRuleContext(UnaryOpContext.class,0);
@@ -1580,24 +1562,6 @@ public class DecafParser extends Parser {
 		}
 	}
 	@SuppressWarnings("CheckReturnValue")
-	public static class ThisContext extends ExprContext {
-		public TerminalNode THIS() { return getToken(DecafParser.THIS, 0); }
-		public ThisContext(ExprContext ctx) { copyFrom(ctx); }
-		@Override
-		public void enterRule(ParseTreeListener listener) {
-			if ( listener instanceof DecafListener ) ((DecafListener)listener).enterThis(this);
-		}
-		@Override
-		public void exitRule(ParseTreeListener listener) {
-			if ( listener instanceof DecafListener ) ((DecafListener)listener).exitThis(this);
-		}
-		@Override
-		public <T> T accept(ParseTreeVisitor<? extends T> visitor) {
-			if ( visitor instanceof DecafVisitor ) return ((DecafVisitor<? extends T>)visitor).visitThis(this);
-			else return visitor.visitChildren(this);
-		}
-	}
-	@SuppressWarnings("CheckReturnValue")
 	public static class StatementExpressionexprContext extends ExprContext {
 		public StmtexprContext stmtexpr() {
 			return getRuleContext(StmtexprContext.class,0);
@@ -1633,7 +1597,7 @@ public class DecafParser extends Parser {
 			int _alt;
 			enterOuterAlt(_localctx, 1);
 			{
-			setState(213);
+			setState(211);
 			_errHandler.sync(this);
 			switch ( getInterpreter().adaptivePredict(_input,16,_ctx) ) {
 			case 1:
@@ -1645,7 +1609,7 @@ public class DecafParser extends Parser {
 				setState(201);
 				unaryOp();
 				setState(202);
-				expr(7);
+				expr(5);
 				}
 				break;
 			case 2:
@@ -1688,27 +1652,9 @@ public class DecafParser extends Parser {
 				stmtexpr();
 				}
 				break;
-			case 6:
-				{
-				_localctx = new ThisContext(_localctx);
-				_ctx = _localctx;
-				_prevctx = _localctx;
-				setState(211);
-				match(THIS);
-				}
-				break;
-			case 7:
-				{
-				_localctx = new NullContext(_localctx);
-				_ctx = _localctx;
-				_prevctx = _localctx;
-				setState(212);
-				match(NULL);
-				}
-				break;
 			}
 			_ctx.stop = _input.LT(-1);
-			setState(221);
+			setState(219);
 			_errHandler.sync(this);
 			_alt = getInterpreter().adaptivePredict(_input,17,_ctx);
 			while ( _alt!=2 && _alt!=org.antlr.v4.runtime.atn.ATN.INVALID_ALT_NUMBER ) {
@@ -1719,16 +1665,16 @@ public class DecafParser extends Parser {
 					{
 					_localctx = new BinaryOperationContext(new ExprContext(_parentctx, _parentState));
 					pushNewRecursionContext(_localctx, _startState, RULE_expr);
-					setState(215);
-					if (!(precpred(_ctx, 8))) throw new FailedPredicateException(this, "precpred(_ctx, 8)");
-					setState(216);
+					setState(213);
+					if (!(precpred(_ctx, 6))) throw new FailedPredicateException(this, "precpred(_ctx, 6)");
+					setState(214);
 					binaryOp();
-					setState(217);
-					expr(9);
+					setState(215);
+					expr(7);
 					}
 					} 
 				}
-				setState(223);
+				setState(221);
 				_errHandler.sync(this);
 				_alt = getInterpreter().adaptivePredict(_input,17,_ctx);
 			}
@@ -1784,7 +1730,7 @@ public class DecafParser extends Parser {
 		try {
 			enterOuterAlt(_localctx, 1);
 			{
-			setState(224);
+			setState(222);
 			_la = _input.LA(1);
 			if ( !((((_la) & ~0x3f) == 0 && ((1L << _la) & 17171480576L) != 0)) ) {
 			_errHandler.recoverInline(this);
@@ -1837,7 +1783,7 @@ public class DecafParser extends Parser {
 		try {
 			enterOuterAlt(_localctx, 1);
 			{
-			setState(226);
+			setState(224);
 			_la = _input.LA(1);
 			if ( !(_la==SUB || _la==NOT) ) {
 			_errHandler.recoverInline(this);
@@ -1899,37 +1845,37 @@ public class DecafParser extends Parser {
 			int _alt;
 			enterOuterAlt(_localctx, 1);
 			{
-			setState(230);
+			setState(228);
 			_errHandler.sync(this);
 			_la = _input.LA(1);
 			if (_la==THIS) {
 				{
-				setState(228);
+				setState(226);
 				match(THIS);
-				setState(229);
+				setState(227);
 				match(T__17);
 				}
 			}
 
-			setState(237);
+			setState(235);
 			_errHandler.sync(this);
 			_alt = getInterpreter().adaptivePredict(_input,19,_ctx);
 			while ( _alt!=2 && _alt!=org.antlr.v4.runtime.atn.ATN.INVALID_ALT_NUMBER ) {
 				if ( _alt==1 ) {
 					{
 					{
-					setState(232);
+					setState(230);
 					recipient();
-					setState(233);
+					setState(231);
 					match(T__17);
 					}
 					} 
 				}
-				setState(239);
+				setState(237);
 				_errHandler.sync(this);
 				_alt = getInterpreter().adaptivePredict(_input,19,_ctx);
 			}
-			setState(240);
+			setState(238);
 			id();
 			}
 		}
@@ -1980,11 +1926,11 @@ public class DecafParser extends Parser {
 		try {
 			enterOuterAlt(_localctx, 1);
 			{
-			setState(242);
+			setState(240);
 			fieldVarAccess();
-			setState(243);
+			setState(241);
 			assignSign();
-			setState(244);
+			setState(242);
 			expr(0);
 			}
 		}
@@ -2038,37 +1984,37 @@ public class DecafParser extends Parser {
 			int _alt;
 			enterOuterAlt(_localctx, 1);
 			{
-			setState(248);
+			setState(246);
 			_errHandler.sync(this);
 			_la = _input.LA(1);
 			if (_la==THIS) {
 				{
-				setState(246);
+				setState(244);
 				match(THIS);
-				setState(247);
+				setState(245);
 				match(T__17);
 				}
 			}
 
-			setState(255);
+			setState(253);
 			_errHandler.sync(this);
 			_alt = getInterpreter().adaptivePredict(_input,21,_ctx);
 			while ( _alt!=2 && _alt!=org.antlr.v4.runtime.atn.ATN.INVALID_ALT_NUMBER ) {
 				if ( _alt==1 ) {
 					{
 					{
-					setState(250);
+					setState(248);
 					recipient();
-					setState(251);
+					setState(249);
 					match(T__17);
 					}
 					} 
 				}
-				setState(257);
+				setState(255);
 				_errHandler.sync(this);
 				_alt = getInterpreter().adaptivePredict(_input,21,_ctx);
 			}
-			setState(258);
+			setState(256);
 			methName();
 			}
 		}
@@ -2114,20 +2060,20 @@ public class DecafParser extends Parser {
 		RecipientContext _localctx = new RecipientContext(_ctx, getState());
 		enterRule(_localctx, 40, RULE_recipient);
 		try {
-			setState(262);
+			setState(260);
 			_errHandler.sync(this);
 			switch ( getInterpreter().adaptivePredict(_input,22,_ctx) ) {
 			case 1:
 				enterOuterAlt(_localctx, 1);
 				{
-				setState(260);
+				setState(258);
 				methName();
 				}
 				break;
 			case 2:
 				enterOuterAlt(_localctx, 2);
 				{
-				setState(261);
+				setState(259);
 				id();
 				}
 				break;
@@ -2178,21 +2124,21 @@ public class DecafParser extends Parser {
 		try {
 			enterOuterAlt(_localctx, 1);
 			{
-			setState(264);
+			setState(262);
 			id();
-			setState(265);
+			setState(263);
 			match(T__4);
-			setState(267);
+			setState(265);
 			_errHandler.sync(this);
 			_la = _input.LA(1);
-			if ((((_la) & ~0x3f) == 0 && ((1L << _la) & 132216288968736L) != 0)) {
+			if ((((_la) & ~0x3f) == 0 && ((1L << _la) & 132216286871584L) != 0)) {
 				{
-				setState(266);
+				setState(264);
 				args();
 				}
 			}
 
-			setState(269);
+			setState(267);
 			match(T__5);
 			}
 		}
@@ -2241,21 +2187,21 @@ public class DecafParser extends Parser {
 		try {
 			enterOuterAlt(_localctx, 1);
 			{
-			setState(271);
+			setState(269);
 			expr(0);
-			setState(276);
+			setState(274);
 			_errHandler.sync(this);
 			_la = _input.LA(1);
 			while (_la==T__9) {
 				{
 				{
-				setState(272);
+				setState(270);
 				match(T__9);
-				setState(273);
+				setState(271);
 				expr(0);
 				}
 				}
-				setState(278);
+				setState(276);
 				_errHandler.sync(this);
 				_la = _input.LA(1);
 			}
@@ -2303,7 +2249,7 @@ public class DecafParser extends Parser {
 		try {
 			enterOuterAlt(_localctx, 1);
 			{
-			setState(279);
+			setState(277);
 			_la = _input.LA(1);
 			if ( !((((_la) & ~0x3f) == 0 && ((1L << _la) & 96757023244288L) != 0)) ) {
 			_errHandler.recoverInline(this);
@@ -2354,7 +2300,7 @@ public class DecafParser extends Parser {
 		try {
 			enterOuterAlt(_localctx, 1);
 			{
-			setState(281);
+			setState(279);
 			match(IDENTIFIER);
 			}
 		}
@@ -2379,13 +2325,13 @@ public class DecafParser extends Parser {
 	private boolean expr_sempred(ExprContext _localctx, int predIndex) {
 		switch (predIndex) {
 		case 0:
-			return precpred(_ctx, 8);
+			return precpred(_ctx, 6);
 		}
 		return true;
 	}
 
 	public static final String _serializedATN =
-		"\u0004\u00011\u011c\u0002\u0000\u0007\u0000\u0002\u0001\u0007\u0001\u0002"+
+		"\u0004\u00011\u011a\u0002\u0000\u0007\u0000\u0002\u0001\u0007\u0001\u0002"+
 		"\u0002\u0007\u0002\u0002\u0003\u0007\u0003\u0002\u0004\u0007\u0004\u0002"+
 		"\u0005\u0007\u0005\u0002\u0006\u0007\u0006\u0002\u0007\u0007\u0007\u0002"+
 		"\b\u0007\b\u0002\t\u0007\t\u0002\n\u0007\n\u0002\u000b\u0007\u000b\u0002"+
@@ -2414,156 +2360,153 @@ public class DecafParser extends Parser {
 		"\f\u0001\f\u0001\f\u0001\f\u0001\f\u0003\f\u00bc\b\f\u0001\r\u0001\r\u0001"+
 		"\r\u0001\r\u0001\r\u0003\r\u00c3\b\r\u0001\r\u0001\r\u0003\r\u00c7\b\r"+
 		"\u0001\u000e\u0001\u000e\u0001\u000e\u0001\u000e\u0001\u000e\u0001\u000e"+
-		"\u0001\u000e\u0001\u000e\u0001\u000e\u0001\u000e\u0001\u000e\u0001\u000e"+
-		"\u0001\u000e\u0003\u000e\u00d6\b\u000e\u0001\u000e\u0001\u000e\u0001\u000e"+
-		"\u0001\u000e\u0005\u000e\u00dc\b\u000e\n\u000e\f\u000e\u00df\t\u000e\u0001"+
-		"\u000f\u0001\u000f\u0001\u0010\u0001\u0010\u0001\u0011\u0001\u0011\u0003"+
-		"\u0011\u00e7\b\u0011\u0001\u0011\u0001\u0011\u0001\u0011\u0005\u0011\u00ec"+
-		"\b\u0011\n\u0011\f\u0011\u00ef\t\u0011\u0001\u0011\u0001\u0011\u0001\u0012"+
-		"\u0001\u0012\u0001\u0012\u0001\u0012\u0001\u0013\u0001\u0013\u0003\u0013"+
-		"\u00f9\b\u0013\u0001\u0013\u0001\u0013\u0001\u0013\u0005\u0013\u00fe\b"+
-		"\u0013\n\u0013\f\u0013\u0101\t\u0013\u0001\u0013\u0001\u0013\u0001\u0014"+
-		"\u0001\u0014\u0003\u0014\u0107\b\u0014\u0001\u0015\u0001\u0015\u0001\u0015"+
-		"\u0003\u0015\u010c\b\u0015\u0001\u0015\u0001\u0015\u0001\u0016\u0001\u0016"+
-		"\u0001\u0016\u0005\u0016\u0113\b\u0016\n\u0016\f\u0016\u0116\t\u0016\u0001"+
-		"\u0017\u0001\u0017\u0001\u0018\u0001\u0018\u0001\u0018\u0000\u0001\u001c"+
-		"\u0019\u0000\u0002\u0004\u0006\b\n\f\u000e\u0010\u0012\u0014\u0016\u0018"+
-		"\u001a\u001c\u001e \"$&(*,.0\u0000\u0004\u0001\u0000\"%\u0001\u0000\u0017"+
-		"!\u0002\u0000\u0017\u0017&&\u0002\u0000+,..\u012a\u00002\u0001\u0000\u0000"+
-		"\u0000\u0002D\u0001\u0000\u0000\u0000\u0004J\u0001\u0000\u0000\u0000\u0006"+
-		"N\u0001\u0000\u0000\u0000\bR\u0001\u0000\u0000\u0000\nX\u0001\u0000\u0000"+
-		"\u0000\fZ\u0001\u0000\u0000\u0000\u000ed\u0001\u0000\u0000\u0000\u0010"+
-		"m\u0001\u0000\u0000\u0000\u0012v\u0001\u0000\u0000\u0000\u0014~\u0001"+
-		"\u0000\u0000\u0000\u0016\u0081\u0001\u0000\u0000\u0000\u0018\u00bb\u0001"+
-		"\u0000\u0000\u0000\u001a\u00c6\u0001\u0000\u0000\u0000\u001c\u00d5\u0001"+
-		"\u0000\u0000\u0000\u001e\u00e0\u0001\u0000\u0000\u0000 \u00e2\u0001\u0000"+
-		"\u0000\u0000\"\u00e6\u0001\u0000\u0000\u0000$\u00f2\u0001\u0000\u0000"+
-		"\u0000&\u00f8\u0001\u0000\u0000\u0000(\u0106\u0001\u0000\u0000\u0000*"+
-		"\u0108\u0001\u0000\u0000\u0000,\u010f\u0001\u0000\u0000\u0000.\u0117\u0001"+
-		"\u0000\u0000\u00000\u0119\u0001\u0000\u0000\u000023\u0005\u0013\u0000"+
-		"\u000034\u0005\u0001\u0000\u000045\u00030\u0018\u000057\u0005\u0002\u0000"+
-		"\u000068\u0003\u000e\u0007\u000076\u0001\u0000\u0000\u000078\u0001\u0000"+
-		"\u0000\u00008>\u0001\u0000\u0000\u00009=\u0003\u0002\u0001\u0000:=\u0003"+
-		"\f\u0006\u0000;=\u0003\u0010\b\u0000<9\u0001\u0000\u0000\u0000<:\u0001"+
-		"\u0000\u0000\u0000<;\u0001\u0000\u0000\u0000=@\u0001\u0000\u0000\u0000"+
-		"><\u0001\u0000\u0000\u0000>?\u0001\u0000\u0000\u0000?A\u0001\u0000\u0000"+
-		"\u0000@>\u0001\u0000\u0000\u0000AB\u0005\u0003\u0000\u0000B\u0001\u0001"+
-		"\u0000\u0000\u0000CE\u0005\u0013\u0000\u0000DC\u0001\u0000\u0000\u0000"+
-		"DE\u0001\u0000\u0000\u0000EF\u0001\u0000\u0000\u0000FG\u0003\n\u0005\u0000"+
-		"GH\u00030\u0018\u0000HI\u0005\u0004\u0000\u0000I\u0003\u0001\u0000\u0000"+
-		"\u0000JK\u0003\n\u0005\u0000KL\u00030\u0018\u0000LM\u0005\u0004\u0000"+
-		"\u0000M\u0005\u0001\u0000\u0000\u0000NO\u0007\u0000\u0000\u0000O\u0007"+
-		"\u0001\u0000\u0000\u0000PS\u0003\n\u0005\u0000QS\u0005)\u0000\u0000RP"+
-		"\u0001\u0000\u0000\u0000RQ\u0001\u0000\u0000\u0000S\t\u0001\u0000\u0000"+
-		"\u0000TY\u0005\'\u0000\u0000UY\u0005(\u0000\u0000VY\u0005*\u0000\u0000"+
-		"WY\u00030\u0018\u0000XT\u0001\u0000\u0000\u0000XU\u0001\u0000\u0000\u0000"+
-		"XV\u0001\u0000\u0000\u0000XW\u0001\u0000\u0000\u0000Y\u000b\u0001\u0000"+
-		"\u0000\u0000Z[\u0005\u0013\u0000\u0000[\\\u0003\b\u0004\u0000\\]\u0003"+
-		"0\u0018\u0000]_\u0005\u0005\u0000\u0000^`\u0003\u0012\t\u0000_^\u0001"+
-		"\u0000\u0000\u0000_`\u0001\u0000\u0000\u0000`a\u0001\u0000\u0000\u0000"+
-		"ab\u0005\u0006\u0000\u0000bc\u0003\u0016\u000b\u0000c\r\u0001\u0000\u0000"+
-		"\u0000de\u0005\u0013\u0000\u0000ef\u0005\u0007\u0000\u0000fg\u0005)\u0000"+
-		"\u0000gh\u0005\b\u0000\u0000hi\u0005\u0005\u0000\u0000ij\u0005\t\u0000"+
-		"\u0000jk\u0005\u0006\u0000\u0000kl\u0003\u0016\u000b\u0000l\u000f\u0001"+
-		"\u0000\u0000\u0000mn\u0005\u0013\u0000\u0000no\u00030\u0018\u0000oq\u0005"+
-		"\u0005\u0000\u0000pr\u0003\u0012\t\u0000qp\u0001\u0000\u0000\u0000qr\u0001"+
-		"\u0000\u0000\u0000rs\u0001\u0000\u0000\u0000st\u0005\u0006\u0000\u0000"+
-		"tu\u0003\u0016\u000b\u0000u\u0011\u0001\u0000\u0000\u0000v{\u0003\u0014"+
-		"\n\u0000wx\u0005\n\u0000\u0000xz\u0003\u0014\n\u0000yw\u0001\u0000\u0000"+
-		"\u0000z}\u0001\u0000\u0000\u0000{y\u0001\u0000\u0000\u0000{|\u0001\u0000"+
-		"\u0000\u0000|\u0013\u0001\u0000\u0000\u0000}{\u0001\u0000\u0000\u0000"+
-		"~\u007f\u0003\n\u0005\u0000\u007f\u0080\u00030\u0018\u0000\u0080\u0015"+
-		"\u0001\u0000\u0000\u0000\u0081\u0086\u0005\u0002\u0000\u0000\u0082\u0085"+
-		"\u0003\u0004\u0002\u0000\u0083\u0085\u0003\u0018\f\u0000\u0084\u0082\u0001"+
-		"\u0000\u0000\u0000\u0084\u0083\u0001\u0000\u0000\u0000\u0085\u0088\u0001"+
-		"\u0000\u0000\u0000\u0086\u0084\u0001\u0000\u0000\u0000\u0086\u0087\u0001"+
-		"\u0000\u0000\u0000\u0087\u0089\u0001\u0000\u0000\u0000\u0088\u0086\u0001"+
-		"\u0000\u0000\u0000\u0089\u008a\u0005\u0003\u0000\u0000\u008a\u0017\u0001"+
-		"\u0000\u0000\u0000\u008b\u008c\u0005\u000b\u0000\u0000\u008c\u008d\u0005"+
-		"\u0005\u0000\u0000\u008d\u008e\u0003\u001c\u000e\u0000\u008e\u008f\u0005"+
-		"\u0006\u0000\u0000\u008f\u0092\u0003\u0016\u000b\u0000\u0090\u0091\u0005"+
-		"\f\u0000\u0000\u0091\u0093\u0003\u0016\u000b\u0000\u0092\u0090\u0001\u0000"+
-		"\u0000\u0000\u0092\u0093\u0001\u0000\u0000\u0000\u0093\u00bc\u0001\u0000"+
-		"\u0000\u0000\u0094\u0095\u0005\r\u0000\u0000\u0095\u0096\u0005\u0005\u0000"+
-		"\u0000\u0096\u0097\u0003$\u0012\u0000\u0097\u0098\u0005\u0004\u0000\u0000"+
-		"\u0098\u0099\u0003\u001c\u000e\u0000\u0099\u009a\u0005\u0004\u0000\u0000"+
-		"\u009a\u009b\u0003$\u0012\u0000\u009b\u009c\u0005\u0006\u0000\u0000\u009c"+
-		"\u009d\u0003\u0016\u000b\u0000\u009d\u00bc\u0001\u0000\u0000\u0000\u009e"+
-		"\u009f\u0005\u000e\u0000\u0000\u009f\u00a0\u0005\u0005\u0000\u0000\u00a0"+
-		"\u00a1\u0003\u001c\u000e\u0000\u00a1\u00a2\u0005\u0006\u0000\u0000\u00a2"+
-		"\u00a3\u0003\u0016\u000b\u0000\u00a3\u00bc\u0001\u0000\u0000\u0000\u00a4"+
-		"\u00a5\u0005\u000f\u0000\u0000\u00a5\u00a6\u0003\u0016\u000b\u0000\u00a6"+
-		"\u00a7\u0005\u000e\u0000\u0000\u00a7\u00a8\u0005\u0005\u0000\u0000\u00a8"+
-		"\u00a9\u0003\u001c\u000e\u0000\u00a9\u00ab\u0005\u0006\u0000\u0000\u00aa"+
-		"\u00ac\u0005\u0004\u0000\u0000\u00ab\u00aa\u0001\u0000\u0000\u0000\u00ab"+
-		"\u00ac\u0001\u0000\u0000\u0000\u00ac\u00bc\u0001\u0000\u0000\u0000\u00ad"+
-		"\u00ae\u0005\u0010\u0000\u0000\u00ae\u00af\u0003\u001c\u000e\u0000\u00af"+
-		"\u00b0\u0005\u0004\u0000\u0000\u00b0\u00bc\u0001\u0000\u0000\u0000\u00b1"+
-		"\u00b2\u0005\u0010\u0000\u0000\u00b2\u00bc\u0005\u0004\u0000\u0000\u00b3"+
-		"\u00b4\u0005\u0011\u0000\u0000\u00b4\u00bc\u0005\u0004\u0000\u0000\u00b5"+
-		"\u00b6\u0003$\u0012\u0000\u00b6\u00b7\u0005\u0004\u0000\u0000\u00b7\u00bc"+
-		"\u0001\u0000\u0000\u0000\u00b8\u00b9\u0003\u001a\r\u0000\u00b9\u00ba\u0005"+
-		"\u0004\u0000\u0000\u00ba\u00bc\u0001\u0000\u0000\u0000\u00bb\u008b\u0001"+
-		"\u0000\u0000\u0000\u00bb\u0094\u0001\u0000\u0000\u0000\u00bb\u009e\u0001"+
-		"\u0000\u0000\u0000\u00bb\u00a4\u0001\u0000\u0000\u0000\u00bb\u00ad\u0001"+
-		"\u0000\u0000\u0000\u00bb\u00b1\u0001\u0000\u0000\u0000\u00bb\u00b3\u0001"+
-		"\u0000\u0000\u0000\u00bb\u00b5\u0001\u0000\u0000\u0000\u00bb\u00b8\u0001"+
-		"\u0000\u0000\u0000\u00bc\u0019\u0001\u0000\u0000\u0000\u00bd\u00c7\u0003"+
-		"&\u0013\u0000\u00be\u00bf\u0005\u0014\u0000\u0000\u00bf\u00c0\u0003\n"+
-		"\u0005\u0000\u00c0\u00c2\u0005\u0005\u0000\u0000\u00c1\u00c3\u0003,\u0016"+
-		"\u0000\u00c2\u00c1\u0001\u0000\u0000\u0000\u00c2\u00c3\u0001\u0000\u0000"+
-		"\u0000\u00c3\u00c4\u0001\u0000\u0000\u0000\u00c4\u00c5\u0005\u0006\u0000"+
-		"\u0000\u00c5\u00c7\u0001\u0000\u0000\u0000\u00c6\u00bd\u0001\u0000\u0000"+
-		"\u0000\u00c6\u00be\u0001\u0000\u0000\u0000\u00c7\u001b\u0001\u0000\u0000"+
-		"\u0000\u00c8\u00c9\u0006\u000e\uffff\uffff\u0000\u00c9\u00ca\u0003 \u0010"+
-		"\u0000\u00ca\u00cb\u0003\u001c\u000e\u0007\u00cb\u00d6\u0001\u0000\u0000"+
-		"\u0000\u00cc\u00d6\u0003.\u0017\u0000\u00cd\u00ce\u0005\u0005\u0000\u0000"+
-		"\u00ce\u00cf\u0003\u001c\u000e\u0000\u00cf\u00d0\u0005\u0006\u0000\u0000"+
-		"\u00d0\u00d6\u0001\u0000\u0000\u0000\u00d1\u00d6\u0003\"\u0011\u0000\u00d2"+
-		"\u00d6\u0003\u001a\r\u0000\u00d3\u00d6\u0005\u0016\u0000\u0000\u00d4\u00d6"+
-		"\u0005\u0015\u0000\u0000\u00d5\u00c8\u0001\u0000\u0000\u0000\u00d5\u00cc"+
-		"\u0001\u0000\u0000\u0000\u00d5\u00cd\u0001\u0000\u0000\u0000\u00d5\u00d1"+
-		"\u0001\u0000\u0000\u0000\u00d5\u00d2\u0001\u0000\u0000\u0000\u00d5\u00d3"+
-		"\u0001\u0000\u0000\u0000\u00d5\u00d4\u0001\u0000\u0000\u0000\u00d6\u00dd"+
-		"\u0001\u0000\u0000\u0000\u00d7\u00d8\n\b\u0000\u0000\u00d8\u00d9\u0003"+
-		"\u001e\u000f\u0000\u00d9\u00da\u0003\u001c\u000e\t\u00da\u00dc\u0001\u0000"+
-		"\u0000\u0000\u00db\u00d7\u0001\u0000\u0000\u0000\u00dc\u00df\u0001\u0000"+
-		"\u0000\u0000\u00dd\u00db\u0001\u0000\u0000\u0000\u00dd\u00de\u0001\u0000"+
-		"\u0000\u0000\u00de\u001d\u0001\u0000\u0000\u0000\u00df\u00dd\u0001\u0000"+
-		"\u0000\u0000\u00e0\u00e1\u0007\u0001\u0000\u0000\u00e1\u001f\u0001\u0000"+
-		"\u0000\u0000\u00e2\u00e3\u0007\u0002\u0000\u0000\u00e3!\u0001\u0000\u0000"+
-		"\u0000\u00e4\u00e5\u0005\u0016\u0000\u0000\u00e5\u00e7\u0005\u0012\u0000"+
-		"\u0000\u00e6\u00e4\u0001\u0000\u0000\u0000\u00e6\u00e7\u0001\u0000\u0000"+
-		"\u0000\u00e7\u00ed\u0001\u0000\u0000\u0000\u00e8\u00e9\u0003(\u0014\u0000"+
-		"\u00e9\u00ea\u0005\u0012\u0000\u0000\u00ea\u00ec\u0001\u0000\u0000\u0000"+
-		"\u00eb\u00e8\u0001\u0000\u0000\u0000\u00ec\u00ef\u0001\u0000\u0000\u0000"+
-		"\u00ed\u00eb\u0001\u0000\u0000\u0000\u00ed\u00ee\u0001\u0000\u0000\u0000"+
-		"\u00ee\u00f0\u0001\u0000\u0000\u0000\u00ef\u00ed\u0001\u0000\u0000\u0000"+
-		"\u00f0\u00f1\u00030\u0018\u0000\u00f1#\u0001\u0000\u0000\u0000\u00f2\u00f3"+
-		"\u0003\"\u0011\u0000\u00f3\u00f4\u0003\u0006\u0003\u0000\u00f4\u00f5\u0003"+
-		"\u001c\u000e\u0000\u00f5%\u0001\u0000\u0000\u0000\u00f6\u00f7\u0005\u0016"+
-		"\u0000\u0000\u00f7\u00f9\u0005\u0012\u0000\u0000\u00f8\u00f6\u0001\u0000"+
-		"\u0000\u0000\u00f8\u00f9\u0001\u0000\u0000\u0000\u00f9\u00ff\u0001\u0000"+
-		"\u0000\u0000\u00fa\u00fb\u0003(\u0014\u0000\u00fb\u00fc\u0005\u0012\u0000"+
-		"\u0000\u00fc\u00fe\u0001\u0000\u0000\u0000\u00fd\u00fa\u0001\u0000\u0000"+
-		"\u0000\u00fe\u0101\u0001\u0000\u0000\u0000\u00ff\u00fd\u0001\u0000\u0000"+
-		"\u0000\u00ff\u0100\u0001\u0000\u0000\u0000\u0100\u0102\u0001\u0000\u0000"+
-		"\u0000\u0101\u00ff\u0001\u0000\u0000\u0000\u0102\u0103\u0003*\u0015\u0000"+
-		"\u0103\'\u0001\u0000\u0000\u0000\u0104\u0107\u0003*\u0015\u0000\u0105"+
-		"\u0107\u00030\u0018\u0000\u0106\u0104\u0001\u0000\u0000\u0000\u0106\u0105"+
-		"\u0001\u0000\u0000\u0000\u0107)\u0001\u0000\u0000\u0000\u0108\u0109\u0003"+
-		"0\u0018\u0000\u0109\u010b\u0005\u0005\u0000\u0000\u010a\u010c\u0003,\u0016"+
-		"\u0000\u010b\u010a\u0001\u0000\u0000\u0000\u010b\u010c\u0001\u0000\u0000"+
-		"\u0000\u010c\u010d\u0001\u0000\u0000\u0000\u010d\u010e\u0005\u0006\u0000"+
-		"\u0000\u010e+\u0001\u0000\u0000\u0000\u010f\u0114\u0003\u001c\u000e\u0000"+
-		"\u0110\u0111\u0005\n\u0000\u0000\u0111\u0113\u0003\u001c\u000e\u0000\u0112"+
-		"\u0110\u0001\u0000\u0000\u0000\u0113\u0116\u0001\u0000\u0000\u0000\u0114"+
-		"\u0112\u0001\u0000\u0000\u0000\u0114\u0115\u0001\u0000\u0000\u0000\u0115"+
-		"-\u0001\u0000\u0000\u0000\u0116\u0114\u0001\u0000\u0000\u0000\u0117\u0118"+
-		"\u0007\u0003\u0000\u0000\u0118/\u0001\u0000\u0000\u0000\u0119\u011a\u0005"+
-		"-\u0000\u0000\u011a1\u0001\u0000\u0000\u0000\u00197<>DRX_q{\u0084\u0086"+
-		"\u0092\u00ab\u00bb\u00c2\u00c6\u00d5\u00dd\u00e6\u00ed\u00f8\u00ff\u0106"+
-		"\u010b\u0114";
+		"\u0001\u000e\u0001\u000e\u0001\u000e\u0001\u000e\u0001\u000e\u0003\u000e"+
+		"\u00d4\b\u000e\u0001\u000e\u0001\u000e\u0001\u000e\u0001\u000e\u0005\u000e"+
+		"\u00da\b\u000e\n\u000e\f\u000e\u00dd\t\u000e\u0001\u000f\u0001\u000f\u0001"+
+		"\u0010\u0001\u0010\u0001\u0011\u0001\u0011\u0003\u0011\u00e5\b\u0011\u0001"+
+		"\u0011\u0001\u0011\u0001\u0011\u0005\u0011\u00ea\b\u0011\n\u0011\f\u0011"+
+		"\u00ed\t\u0011\u0001\u0011\u0001\u0011\u0001\u0012\u0001\u0012\u0001\u0012"+
+		"\u0001\u0012\u0001\u0013\u0001\u0013\u0003\u0013\u00f7\b\u0013\u0001\u0013"+
+		"\u0001\u0013\u0001\u0013\u0005\u0013\u00fc\b\u0013\n\u0013\f\u0013\u00ff"+
+		"\t\u0013\u0001\u0013\u0001\u0013\u0001\u0014\u0001\u0014\u0003\u0014\u0105"+
+		"\b\u0014\u0001\u0015\u0001\u0015\u0001\u0015\u0003\u0015\u010a\b\u0015"+
+		"\u0001\u0015\u0001\u0015\u0001\u0016\u0001\u0016\u0001\u0016\u0005\u0016"+
+		"\u0111\b\u0016\n\u0016\f\u0016\u0114\t\u0016\u0001\u0017\u0001\u0017\u0001"+
+		"\u0018\u0001\u0018\u0001\u0018\u0000\u0001\u001c\u0019\u0000\u0002\u0004"+
+		"\u0006\b\n\f\u000e\u0010\u0012\u0014\u0016\u0018\u001a\u001c\u001e \""+
+		"$&(*,.0\u0000\u0004\u0001\u0000\"%\u0001\u0000\u0017!\u0002\u0000\u0017"+
+		"\u0017&&\u0002\u0000+,..\u0126\u00002\u0001\u0000\u0000\u0000\u0002D\u0001"+
+		"\u0000\u0000\u0000\u0004J\u0001\u0000\u0000\u0000\u0006N\u0001\u0000\u0000"+
+		"\u0000\bR\u0001\u0000\u0000\u0000\nX\u0001\u0000\u0000\u0000\fZ\u0001"+
+		"\u0000\u0000\u0000\u000ed\u0001\u0000\u0000\u0000\u0010m\u0001\u0000\u0000"+
+		"\u0000\u0012v\u0001\u0000\u0000\u0000\u0014~\u0001\u0000\u0000\u0000\u0016"+
+		"\u0081\u0001\u0000\u0000\u0000\u0018\u00bb\u0001\u0000\u0000\u0000\u001a"+
+		"\u00c6\u0001\u0000\u0000\u0000\u001c\u00d3\u0001\u0000\u0000\u0000\u001e"+
+		"\u00de\u0001\u0000\u0000\u0000 \u00e0\u0001\u0000\u0000\u0000\"\u00e4"+
+		"\u0001\u0000\u0000\u0000$\u00f0\u0001\u0000\u0000\u0000&\u00f6\u0001\u0000"+
+		"\u0000\u0000(\u0104\u0001\u0000\u0000\u0000*\u0106\u0001\u0000\u0000\u0000"+
+		",\u010d\u0001\u0000\u0000\u0000.\u0115\u0001\u0000\u0000\u00000\u0117"+
+		"\u0001\u0000\u0000\u000023\u0005\u0013\u0000\u000034\u0005\u0001\u0000"+
+		"\u000045\u00030\u0018\u000057\u0005\u0002\u0000\u000068\u0003\u000e\u0007"+
+		"\u000076\u0001\u0000\u0000\u000078\u0001\u0000\u0000\u00008>\u0001\u0000"+
+		"\u0000\u00009=\u0003\u0002\u0001\u0000:=\u0003\f\u0006\u0000;=\u0003\u0010"+
+		"\b\u0000<9\u0001\u0000\u0000\u0000<:\u0001\u0000\u0000\u0000<;\u0001\u0000"+
+		"\u0000\u0000=@\u0001\u0000\u0000\u0000><\u0001\u0000\u0000\u0000>?\u0001"+
+		"\u0000\u0000\u0000?A\u0001\u0000\u0000\u0000@>\u0001\u0000\u0000\u0000"+
+		"AB\u0005\u0003\u0000\u0000B\u0001\u0001\u0000\u0000\u0000CE\u0005\u0013"+
+		"\u0000\u0000DC\u0001\u0000\u0000\u0000DE\u0001\u0000\u0000\u0000EF\u0001"+
+		"\u0000\u0000\u0000FG\u0003\n\u0005\u0000GH\u00030\u0018\u0000HI\u0005"+
+		"\u0004\u0000\u0000I\u0003\u0001\u0000\u0000\u0000JK\u0003\n\u0005\u0000"+
+		"KL\u00030\u0018\u0000LM\u0005\u0004\u0000\u0000M\u0005\u0001\u0000\u0000"+
+		"\u0000NO\u0007\u0000\u0000\u0000O\u0007\u0001\u0000\u0000\u0000PS\u0003"+
+		"\n\u0005\u0000QS\u0005)\u0000\u0000RP\u0001\u0000\u0000\u0000RQ\u0001"+
+		"\u0000\u0000\u0000S\t\u0001\u0000\u0000\u0000TY\u0005\'\u0000\u0000UY"+
+		"\u0005(\u0000\u0000VY\u0005*\u0000\u0000WY\u00030\u0018\u0000XT\u0001"+
+		"\u0000\u0000\u0000XU\u0001\u0000\u0000\u0000XV\u0001\u0000\u0000\u0000"+
+		"XW\u0001\u0000\u0000\u0000Y\u000b\u0001\u0000\u0000\u0000Z[\u0005\u0013"+
+		"\u0000\u0000[\\\u0003\b\u0004\u0000\\]\u00030\u0018\u0000]_\u0005\u0005"+
+		"\u0000\u0000^`\u0003\u0012\t\u0000_^\u0001\u0000\u0000\u0000_`\u0001\u0000"+
+		"\u0000\u0000`a\u0001\u0000\u0000\u0000ab\u0005\u0006\u0000\u0000bc\u0003"+
+		"\u0016\u000b\u0000c\r\u0001\u0000\u0000\u0000de\u0005\u0013\u0000\u0000"+
+		"ef\u0005\u0007\u0000\u0000fg\u0005)\u0000\u0000gh\u0005\b\u0000\u0000"+
+		"hi\u0005\u0005\u0000\u0000ij\u0005\t\u0000\u0000jk\u0005\u0006\u0000\u0000"+
+		"kl\u0003\u0016\u000b\u0000l\u000f\u0001\u0000\u0000\u0000mn\u0005\u0013"+
+		"\u0000\u0000no\u00030\u0018\u0000oq\u0005\u0005\u0000\u0000pr\u0003\u0012"+
+		"\t\u0000qp\u0001\u0000\u0000\u0000qr\u0001\u0000\u0000\u0000rs\u0001\u0000"+
+		"\u0000\u0000st\u0005\u0006\u0000\u0000tu\u0003\u0016\u000b\u0000u\u0011"+
+		"\u0001\u0000\u0000\u0000v{\u0003\u0014\n\u0000wx\u0005\n\u0000\u0000x"+
+		"z\u0003\u0014\n\u0000yw\u0001\u0000\u0000\u0000z}\u0001\u0000\u0000\u0000"+
+		"{y\u0001\u0000\u0000\u0000{|\u0001\u0000\u0000\u0000|\u0013\u0001\u0000"+
+		"\u0000\u0000}{\u0001\u0000\u0000\u0000~\u007f\u0003\n\u0005\u0000\u007f"+
+		"\u0080\u00030\u0018\u0000\u0080\u0015\u0001\u0000\u0000\u0000\u0081\u0086"+
+		"\u0005\u0002\u0000\u0000\u0082\u0085\u0003\u0004\u0002\u0000\u0083\u0085"+
+		"\u0003\u0018\f\u0000\u0084\u0082\u0001\u0000\u0000\u0000\u0084\u0083\u0001"+
+		"\u0000\u0000\u0000\u0085\u0088\u0001\u0000\u0000\u0000\u0086\u0084\u0001"+
+		"\u0000\u0000\u0000\u0086\u0087\u0001\u0000\u0000\u0000\u0087\u0089\u0001"+
+		"\u0000\u0000\u0000\u0088\u0086\u0001\u0000\u0000\u0000\u0089\u008a\u0005"+
+		"\u0003\u0000\u0000\u008a\u0017\u0001\u0000\u0000\u0000\u008b\u008c\u0005"+
+		"\u000b\u0000\u0000\u008c\u008d\u0005\u0005\u0000\u0000\u008d\u008e\u0003"+
+		"\u001c\u000e\u0000\u008e\u008f\u0005\u0006\u0000\u0000\u008f\u0092\u0003"+
+		"\u0016\u000b\u0000\u0090\u0091\u0005\f\u0000\u0000\u0091\u0093\u0003\u0016"+
+		"\u000b\u0000\u0092\u0090\u0001\u0000\u0000\u0000\u0092\u0093\u0001\u0000"+
+		"\u0000\u0000\u0093\u00bc\u0001\u0000\u0000\u0000\u0094\u0095\u0005\r\u0000"+
+		"\u0000\u0095\u0096\u0005\u0005\u0000\u0000\u0096\u0097\u0003$\u0012\u0000"+
+		"\u0097\u0098\u0005\u0004\u0000\u0000\u0098\u0099\u0003\u001c\u000e\u0000"+
+		"\u0099\u009a\u0005\u0004\u0000\u0000\u009a\u009b\u0003$\u0012\u0000\u009b"+
+		"\u009c\u0005\u0006\u0000\u0000\u009c\u009d\u0003\u0016\u000b\u0000\u009d"+
+		"\u00bc\u0001\u0000\u0000\u0000\u009e\u009f\u0005\u000e\u0000\u0000\u009f"+
+		"\u00a0\u0005\u0005\u0000\u0000\u00a0\u00a1\u0003\u001c\u000e\u0000\u00a1"+
+		"\u00a2\u0005\u0006\u0000\u0000\u00a2\u00a3\u0003\u0016\u000b\u0000\u00a3"+
+		"\u00bc\u0001\u0000\u0000\u0000\u00a4\u00a5\u0005\u000f\u0000\u0000\u00a5"+
+		"\u00a6\u0003\u0016\u000b\u0000\u00a6\u00a7\u0005\u000e\u0000\u0000\u00a7"+
+		"\u00a8\u0005\u0005\u0000\u0000\u00a8\u00a9\u0003\u001c\u000e\u0000\u00a9"+
+		"\u00ab\u0005\u0006\u0000\u0000\u00aa\u00ac\u0005\u0004\u0000\u0000\u00ab"+
+		"\u00aa\u0001\u0000\u0000\u0000\u00ab\u00ac\u0001\u0000\u0000\u0000\u00ac"+
+		"\u00bc\u0001\u0000\u0000\u0000\u00ad\u00ae\u0005\u0010\u0000\u0000\u00ae"+
+		"\u00af\u0003\u001c\u000e\u0000\u00af\u00b0\u0005\u0004\u0000\u0000\u00b0"+
+		"\u00bc\u0001\u0000\u0000\u0000\u00b1\u00b2\u0005\u0010\u0000\u0000\u00b2"+
+		"\u00bc\u0005\u0004\u0000\u0000\u00b3\u00b4\u0005\u0011\u0000\u0000\u00b4"+
+		"\u00bc\u0005\u0004\u0000\u0000\u00b5\u00b6\u0003$\u0012\u0000\u00b6\u00b7"+
+		"\u0005\u0004\u0000\u0000\u00b7\u00bc\u0001\u0000\u0000\u0000\u00b8\u00b9"+
+		"\u0003\u001a\r\u0000\u00b9\u00ba\u0005\u0004\u0000\u0000\u00ba\u00bc\u0001"+
+		"\u0000\u0000\u0000\u00bb\u008b\u0001\u0000\u0000\u0000\u00bb\u0094\u0001"+
+		"\u0000\u0000\u0000\u00bb\u009e\u0001\u0000\u0000\u0000\u00bb\u00a4\u0001"+
+		"\u0000\u0000\u0000\u00bb\u00ad\u0001\u0000\u0000\u0000\u00bb\u00b1\u0001"+
+		"\u0000\u0000\u0000\u00bb\u00b3\u0001\u0000\u0000\u0000\u00bb\u00b5\u0001"+
+		"\u0000\u0000\u0000\u00bb\u00b8\u0001\u0000\u0000\u0000\u00bc\u0019\u0001"+
+		"\u0000\u0000\u0000\u00bd\u00c7\u0003&\u0013\u0000\u00be\u00bf\u0005\u0014"+
+		"\u0000\u0000\u00bf\u00c0\u0003\n\u0005\u0000\u00c0\u00c2\u0005\u0005\u0000"+
+		"\u0000\u00c1\u00c3\u0003,\u0016\u0000\u00c2\u00c1\u0001\u0000\u0000\u0000"+
+		"\u00c2\u00c3\u0001\u0000\u0000\u0000\u00c3\u00c4\u0001\u0000\u0000\u0000"+
+		"\u00c4\u00c5\u0005\u0006\u0000\u0000\u00c5\u00c7\u0001\u0000\u0000\u0000"+
+		"\u00c6\u00bd\u0001\u0000\u0000\u0000\u00c6\u00be\u0001\u0000\u0000\u0000"+
+		"\u00c7\u001b\u0001\u0000\u0000\u0000\u00c8\u00c9\u0006\u000e\uffff\uffff"+
+		"\u0000\u00c9\u00ca\u0003 \u0010\u0000\u00ca\u00cb\u0003\u001c\u000e\u0005"+
+		"\u00cb\u00d4\u0001\u0000\u0000\u0000\u00cc\u00d4\u0003.\u0017\u0000\u00cd"+
+		"\u00ce\u0005\u0005\u0000\u0000\u00ce\u00cf\u0003\u001c\u000e\u0000\u00cf"+
+		"\u00d0\u0005\u0006\u0000\u0000\u00d0\u00d4\u0001\u0000\u0000\u0000\u00d1"+
+		"\u00d4\u0003\"\u0011\u0000\u00d2\u00d4\u0003\u001a\r\u0000\u00d3\u00c8"+
+		"\u0001\u0000\u0000\u0000\u00d3\u00cc\u0001\u0000\u0000\u0000\u00d3\u00cd"+
+		"\u0001\u0000\u0000\u0000\u00d3\u00d1\u0001\u0000\u0000\u0000\u00d3\u00d2"+
+		"\u0001\u0000\u0000\u0000\u00d4\u00db\u0001\u0000\u0000\u0000\u00d5\u00d6"+
+		"\n\u0006\u0000\u0000\u00d6\u00d7\u0003\u001e\u000f\u0000\u00d7\u00d8\u0003"+
+		"\u001c\u000e\u0007\u00d8\u00da\u0001\u0000\u0000\u0000\u00d9\u00d5\u0001"+
+		"\u0000\u0000\u0000\u00da\u00dd\u0001\u0000\u0000\u0000\u00db\u00d9\u0001"+
+		"\u0000\u0000\u0000\u00db\u00dc\u0001\u0000\u0000\u0000\u00dc\u001d\u0001"+
+		"\u0000\u0000\u0000\u00dd\u00db\u0001\u0000\u0000\u0000\u00de\u00df\u0007"+
+		"\u0001\u0000\u0000\u00df\u001f\u0001\u0000\u0000\u0000\u00e0\u00e1\u0007"+
+		"\u0002\u0000\u0000\u00e1!\u0001\u0000\u0000\u0000\u00e2\u00e3\u0005\u0016"+
+		"\u0000\u0000\u00e3\u00e5\u0005\u0012\u0000\u0000\u00e4\u00e2\u0001\u0000"+
+		"\u0000\u0000\u00e4\u00e5\u0001\u0000\u0000\u0000\u00e5\u00eb\u0001\u0000"+
+		"\u0000\u0000\u00e6\u00e7\u0003(\u0014\u0000\u00e7\u00e8\u0005\u0012\u0000"+
+		"\u0000\u00e8\u00ea\u0001\u0000\u0000\u0000\u00e9\u00e6\u0001\u0000\u0000"+
+		"\u0000\u00ea\u00ed\u0001\u0000\u0000\u0000\u00eb\u00e9\u0001\u0000\u0000"+
+		"\u0000\u00eb\u00ec\u0001\u0000\u0000\u0000\u00ec\u00ee\u0001\u0000\u0000"+
+		"\u0000\u00ed\u00eb\u0001\u0000\u0000\u0000\u00ee\u00ef\u00030\u0018\u0000"+
+		"\u00ef#\u0001\u0000\u0000\u0000\u00f0\u00f1\u0003\"\u0011\u0000\u00f1"+
+		"\u00f2\u0003\u0006\u0003\u0000\u00f2\u00f3\u0003\u001c\u000e\u0000\u00f3"+
+		"%\u0001\u0000\u0000\u0000\u00f4\u00f5\u0005\u0016\u0000\u0000\u00f5\u00f7"+
+		"\u0005\u0012\u0000\u0000\u00f6\u00f4\u0001\u0000\u0000\u0000\u00f6\u00f7"+
+		"\u0001\u0000\u0000\u0000\u00f7\u00fd\u0001\u0000\u0000\u0000\u00f8\u00f9"+
+		"\u0003(\u0014\u0000\u00f9\u00fa\u0005\u0012\u0000\u0000\u00fa\u00fc\u0001"+
+		"\u0000\u0000\u0000\u00fb\u00f8\u0001\u0000\u0000\u0000\u00fc\u00ff\u0001"+
+		"\u0000\u0000\u0000\u00fd\u00fb\u0001\u0000\u0000\u0000\u00fd\u00fe\u0001"+
+		"\u0000\u0000\u0000\u00fe\u0100\u0001\u0000\u0000\u0000\u00ff\u00fd\u0001"+
+		"\u0000\u0000\u0000\u0100\u0101\u0003*\u0015\u0000\u0101\'\u0001\u0000"+
+		"\u0000\u0000\u0102\u0105\u0003*\u0015\u0000\u0103\u0105\u00030\u0018\u0000"+
+		"\u0104\u0102\u0001\u0000\u0000\u0000\u0104\u0103\u0001\u0000\u0000\u0000"+
+		"\u0105)\u0001\u0000\u0000\u0000\u0106\u0107\u00030\u0018\u0000\u0107\u0109"+
+		"\u0005\u0005\u0000\u0000\u0108\u010a\u0003,\u0016\u0000\u0109\u0108\u0001"+
+		"\u0000\u0000\u0000\u0109\u010a\u0001\u0000\u0000\u0000\u010a\u010b\u0001"+
+		"\u0000\u0000\u0000\u010b\u010c\u0005\u0006\u0000\u0000\u010c+\u0001\u0000"+
+		"\u0000\u0000\u010d\u0112\u0003\u001c\u000e\u0000\u010e\u010f\u0005\n\u0000"+
+		"\u0000\u010f\u0111\u0003\u001c\u000e\u0000\u0110\u010e\u0001\u0000\u0000"+
+		"\u0000\u0111\u0114\u0001\u0000\u0000\u0000\u0112\u0110\u0001\u0000\u0000"+
+		"\u0000\u0112\u0113\u0001\u0000\u0000\u0000\u0113-\u0001\u0000\u0000\u0000"+
+		"\u0114\u0112\u0001\u0000\u0000\u0000\u0115\u0116\u0007\u0003\u0000\u0000"+
+		"\u0116/\u0001\u0000\u0000\u0000\u0117\u0118\u0005-\u0000\u0000\u01181"+
+		"\u0001\u0000\u0000\u0000\u00197<>DRX_q{\u0084\u0086\u0092\u00ab\u00bb"+
+		"\u00c2\u00c6\u00d3\u00db\u00e4\u00eb\u00f6\u00fd\u0104\u0109\u0112";
 	public static final ATN _ATN =
 		new ATNDeserializer().deserialize(_serializedATN.toCharArray());
 	static {
diff --git a/src/main/java/de/maishai/antlr/DecafVisitor.java b/src/main/java/de/maishai/antlr/DecafVisitor.java
index ba2600d..9c24df8 100644
--- a/src/main/java/de/maishai/antlr/DecafVisitor.java
+++ b/src/main/java/de/maishai/antlr/DecafVisitor.java
@@ -159,13 +159,6 @@ public interface DecafVisitor<T> extends ParseTreeVisitor<T> {
 	 * @return the visitor result
 	 */
 	T visitNew(DecafParser.NewContext ctx);
-	/**
-	 * Visit a parse tree produced by the {@code Null}
-	 * labeled alternative in {@link DecafParser#expr}.
-	 * @param ctx the parse tree
-	 * @return the visitor result
-	 */
-	T visitNull(DecafParser.NullContext ctx);
 	/**
 	 * Visit a parse tree produced by the {@code UnaryOperation}
 	 * labeled alternative in {@link DecafParser#expr}.
@@ -201,13 +194,6 @@ public interface DecafVisitor<T> extends ParseTreeVisitor<T> {
 	 * @return the visitor result
 	 */
 	T visitBinaryOperation(DecafParser.BinaryOperationContext ctx);
-	/**
-	 * Visit a parse tree produced by the {@code This}
-	 * labeled alternative in {@link DecafParser#expr}.
-	 * @param ctx the parse tree
-	 * @return the visitor result
-	 */
-	T visitThis(DecafParser.ThisContext ctx);
 	/**
 	 * Visit a parse tree produced by the {@code StatementExpressionexpr}
 	 * labeled alternative in {@link DecafParser#expr}.
diff --git a/src/main/java/de/maishai/ast/records/Expression.java b/src/main/java/de/maishai/ast/records/Expression.java
index 974c05b..2463f86 100644
--- a/src/main/java/de/maishai/ast/records/Expression.java
+++ b/src/main/java/de/maishai/ast/records/Expression.java
@@ -1,5 +1,5 @@
 package de.maishai.ast.records;
 
 
-public sealed interface Expression extends Node permits Binary, BoolLiteral, CharLiteral, FieldVarAccess, IntLiteral, MethodCall, New, Null, This, Unary {
+public sealed interface Expression extends Node permits Binary, BoolLiteral, CharLiteral, FieldVarAccess, IntLiteral, MethodCall, New, Unary {
 }
diff --git a/src/main/java/de/maishai/ast/records/Null.java b/src/main/java/de/maishai/ast/records/Null.java
deleted file mode 100644
index 5d184eb..0000000
--- a/src/main/java/de/maishai/ast/records/Null.java
+++ /dev/null
@@ -1,5 +0,0 @@
-package de.maishai.ast.records;
-
-
-public record Null() implements Expression {
-}
diff --git a/src/main/java/de/maishai/ast/records/This.java b/src/main/java/de/maishai/ast/records/This.java
deleted file mode 100644
index 38c8cc3..0000000
--- a/src/main/java/de/maishai/ast/records/This.java
+++ /dev/null
@@ -1,5 +0,0 @@
-package de.maishai.ast.records;
-
-
-public record This() implements Expression {
-}