Clean up source code using default Eclipse settings.

Triangle.AbstractMachine.Interpreter/src/main/java/Triangle/AbstractMachine/Interpreter.java

@@ -377,7 +377,7 @@ public class Interpreter {
         } catch (java.io.IOException s) {
           status = failedIOError;
         }
-        data[addr] = (int) currentChar;
+        data[addr] = currentChar;
         break;
       case Machine.putDisplacement:
         ST = ST - 1;

Triangle.Compiler/src/main/java/Triangle/AbstractSyntaxTrees/AnyTypeDenoter.java

@@ -22,10 +22,12 @@ public class AnyTypeDenoter extends TypeDenoter {
     super(thePosition);
   }
 
+  @Override
 public Object visit(Visitor v, Object o) {
     return v.visitAnyTypeDenoter(this, o);
   }
 
+  @Override
 public boolean equals(Object obj) {
     return false;
   }

Triangle.Compiler/src/main/java/Triangle/AbstractSyntaxTrees/ArrayExpression.java

@@ -24,6 +24,7 @@ public class ArrayExpression extends Expression {
     AA = aaAST;
   }
 
+  @Override
 public Object visit(Visitor v, Object o) {
     return v.visitArrayExpression(this, o);
   }

Triangle.Compiler/src/main/java/Triangle/AbstractSyntaxTrees/ArrayTypeDenoter.java

@@ -25,10 +25,12 @@ public class ArrayTypeDenoter extends TypeDenoter {
     T = tAST;
   }
 
+  @Override
 public Object visit(Visitor v, Object o) {
     return v.visitArrayTypeDenoter(this, o);
   }
 
+  @Override
 public boolean equals(Object obj) {
     if (obj != null && obj instanceof ErrorTypeDenoter)
       return true;

Triangle.Compiler/src/main/java/Triangle/AbstractSyntaxTrees/AssignCommand.java

@@ -24,6 +24,7 @@ public class AssignCommand extends Command {
     E = eAST;
   }
 
+  @Override
 public Object visit(Visitor v, Object o) {
     return v.visitAssignCommand(this, o);
   }

Triangle.Compiler/src/main/java/Triangle/AbstractSyntaxTrees/BinaryExpression.java

@@ -26,6 +26,7 @@ public class BinaryExpression extends Expression {
     E2 = e2AST;
   }
 
+  @Override
 public Object visit(Visitor v, Object o) {
     return v.visitBinaryExpression(this, o);
   }

Triangle.Compiler/src/main/java/Triangle/AbstractSyntaxTrees/BinaryOperatorDeclaration.java

@@ -28,6 +28,7 @@ public class BinaryOperatorDeclaration extends Declaration {
     RES = resultAST;
   }
 
+  @Override
 public Object visit(Visitor v, Object o) {
     return v.visitBinaryOperatorDeclaration(this, o);
   }

Triangle.Compiler/src/main/java/Triangle/AbstractSyntaxTrees/BoolTypeDenoter.java

@@ -22,10 +22,12 @@ public class BoolTypeDenoter extends TypeDenoter {
     super(thePosition);
   }
 
+  @Override
 public Object visit(Visitor v, Object o) {
     return v.visitBoolTypeDenoter(this, o);
   }
 
+  @Override
 public boolean equals(Object obj) {
     if ((obj != null) && (obj instanceof ErrorTypeDenoter))
       return true;

Triangle.Compiler/src/main/java/Triangle/AbstractSyntaxTrees/CallCommand.java

@@ -25,6 +25,7 @@ public class CallCommand extends Command {
     APS = apsAST;
   }
 
+  @Override
 public Object visit(Visitor v, Object o) {
     return v.visitCallCommand(this, o);
   }

Triangle.Compiler/src/main/java/Triangle/AbstractSyntaxTrees/CallExpression.java

@@ -25,6 +25,7 @@ public class CallExpression extends Expression {
     APS = apsAST;
   }
 
+  @Override
 public Object visit(Visitor v, Object o) {
     return v.visitCallExpression(this, o);
   }

Triangle.Compiler/src/main/java/Triangle/AbstractSyntaxTrees/CharTypeDenoter.java

@@ -22,10 +22,12 @@ public class CharTypeDenoter extends TypeDenoter {
     super(thePosition);
   }
 
+  @Override
 public Object visit(Visitor v, Object o) {
     return v.visitCharTypeDenoter(this, o);
   }
 
+  @Override
 public boolean equals(Object obj) {
     if (obj != null && obj instanceof ErrorTypeDenoter)
       return true;

Triangle.Compiler/src/main/java/Triangle/AbstractSyntaxTrees/CharacterExpression.java

@@ -23,6 +23,7 @@ public class CharacterExpression extends Expression {
     CL = clAST;
   }
 
+  @Override
 public Object visit(Visitor v, Object o) {
     return v.visitCharacterExpression(this, o);
   }

Triangle.Compiler/src/main/java/Triangle/AbstractSyntaxTrees/CharacterLiteral.java

@@ -22,6 +22,7 @@ public class CharacterLiteral extends Terminal {
     super(theSpelling, thePosition);
   }
 
+  @Override
 public Object visit(Visitor v, Object o) {
     return v.visitCharacterLiteral(this, o);
   }

Triangle.Compiler/src/main/java/Triangle/AbstractSyntaxTrees/ConstActualParameter.java

@@ -23,6 +23,7 @@ public class ConstActualParameter extends ActualParameter {
     E = eAST;
   }
 
+  @Override
 public Object visit(Visitor v, Object o) {
     return v.visitConstActualParameter(this, o);
   }

Triangle.Compiler/src/main/java/Triangle/AbstractSyntaxTrees/ConstDeclaration.java

@@ -25,6 +25,7 @@ public class ConstDeclaration extends Declaration {
     E = eAST;
   }
 
+  @Override
 public Object visit(Visitor v, Object o) {
     return v.visitConstDeclaration(this, o);
   }

Triangle.Compiler/src/main/java/Triangle/AbstractSyntaxTrees/ConstFormalParameter.java

@@ -25,6 +25,7 @@ public class ConstFormalParameter extends FormalParameter {
     T = tAST;
   }
 
+  @Override
 public Object visit(Visitor v, Object o) {
     return v.visitConstFormalParameter(this, o);
   }
@@ -32,6 +33,7 @@ public class ConstFormalParameter extends FormalParameter {
   public Identifier I;
   public TypeDenoter T;
 
+  @Override
 public boolean equals(Object fpAST) {
     if (fpAST instanceof ConstFormalParameter) {
       ConstFormalParameter cfpAST = (ConstFormalParameter) fpAST;

Triangle.Compiler/src/main/java/Triangle/AbstractSyntaxTrees/DotVname.java

@@ -24,6 +24,7 @@ public class DotVname extends Vname {
     I = iAST;
   }
 
+  @Override
 public Object visit(Visitor v, Object o) {
     return v.visitDotVname(this, o);
   }

Triangle.Compiler/src/main/java/Triangle/AbstractSyntaxTrees/EmptyActualParameterSequence.java

@@ -22,6 +22,7 @@ public class EmptyActualParameterSequence extends ActualParameterSequence {
     super(thePosition);
   }
 
+  @Override
 public Object visit(Visitor v, Object o) {
     return v.visitEmptyActualParameterSequence(this, o);
   }

Triangle.Compiler/src/main/java/Triangle/AbstractSyntaxTrees/EmptyCommand.java

@@ -22,6 +22,7 @@ public class EmptyCommand extends Command {
     super(thePosition);
   }
 
+  @Override
 public Object visit(Visitor v, Object o) {
     return v.visitEmptyCommand(this, o);
   }

Triangle.Compiler/src/main/java/Triangle/AbstractSyntaxTrees/EmptyExpression.java

@@ -22,6 +22,7 @@ public class EmptyExpression extends Expression {
     super(thePosition);
   }
 
+  @Override
 public Object visit(Visitor v, Object o) {
     return v.visitEmptyExpression(this, o);
   }

Triangle.Compiler/src/main/java/Triangle/AbstractSyntaxTrees/EmptyFormalParameterSequence.java

@@ -22,10 +22,12 @@ public class EmptyFormalParameterSequence extends FormalParameterSequence {
     super(thePosition);
   }
 
+  @Override
 public Object visit(Visitor v, Object o) {
     return v.visitEmptyFormalParameterSequence(this, o);
   }
 
+  @Override
 public boolean equals(Object fpsAST) {
     return (fpsAST instanceof EmptyFormalParameterSequence);
   }

Triangle.Compiler/src/main/java/Triangle/AbstractSyntaxTrees/ErrorTypeDenoter.java

@@ -22,10 +22,12 @@ public class ErrorTypeDenoter extends TypeDenoter {
     super(thePosition);
   }
 
+  @Override
 public Object visit(Visitor v, Object o) {
     return v.visitErrorTypeDenoter(this, o);
   }
 
+  @Override
 public boolean equals(Object obj) {
     return true;
   }

Triangle.Compiler/src/main/java/Triangle/AbstractSyntaxTrees/FieldTypeDenoter.java

@@ -22,5 +22,6 @@ public abstract class FieldTypeDenoter extends TypeDenoter {
     super(thePosition);
   }
 
+  @Override
 public abstract boolean equals(Object obj);
 }

Triangle.Compiler/src/main/java/Triangle/AbstractSyntaxTrees/FormalParameter.java

@@ -22,6 +22,7 @@ public abstract class FormalParameter extends Declaration {
     super(thePosition);
   }
 
+  @Override
 public abstract boolean equals(Object fpAST);
 
 }

Triangle.Compiler/src/main/java/Triangle/AbstractSyntaxTrees/FormalParameterSequence.java

@@ -22,5 +22,6 @@ public abstract class FormalParameterSequence extends AST {
     super(thePosition);
   }
 
+  @Override
 public abstract boolean equals(Object fpsAST);
 }

Triangle.Compiler/src/main/java/Triangle/AbstractSyntaxTrees/FuncActualParameter.java

@@ -23,6 +23,7 @@ public class FuncActualParameter extends ActualParameter {
     I = iAST;
   }
 
+  @Override
 public Object visit(Visitor v, Object o) {
     return v.visitFuncActualParameter(this, o);
   }

Triangle.Compiler/src/main/java/Triangle/AbstractSyntaxTrees/FuncDeclaration.java

@@ -28,6 +28,7 @@ public class FuncDeclaration extends Declaration {
     E = eAST;
   }
 
+  @Override
 public Object visit(Visitor v, Object o) {
     return v.visitFuncDeclaration(this, o);
   }

Triangle.Compiler/src/main/java/Triangle/AbstractSyntaxTrees/FuncFormalParameter.java

@@ -26,10 +26,12 @@ public class FuncFormalParameter extends FormalParameter {
     T = tAST;
   }
 
+  @Override
 public Object visit(Visitor v, Object o) {
     return v.visitFuncFormalParameter(this, o);
   }
 
+  @Override
 public boolean equals(Object fpAST) {
     if (fpAST instanceof FuncFormalParameter) {
       FuncFormalParameter ffpAST = (FuncFormalParameter) fpAST;

Triangle.Compiler/src/main/java/Triangle/AbstractSyntaxTrees/Identifier.java

@@ -24,6 +24,7 @@ public class Identifier extends Terminal {
     decl = null;
   }
 
+  @Override
 public Object visit(Visitor v, Object o) {
     return v.visitIdentifier(this, o);
   }

Triangle.Compiler/src/main/java/Triangle/AbstractSyntaxTrees/IfCommand.java

@@ -26,6 +26,7 @@ public class IfCommand extends Command {
     C2 = c2AST;
   }
 
+  @Override
 public Object visit(Visitor v, Object o) {
     return v.visitIfCommand(this, o);
   }

Triangle.Compiler/src/main/java/Triangle/AbstractSyntaxTrees/IfExpression.java

@@ -26,6 +26,7 @@ public class IfExpression extends Expression {
     E3 = e3AST;
   }
 
+  @Override
 public Object visit(Visitor v, Object o) {
     return v.visitIfExpression(this, o);
   }

Triangle.Compiler/src/main/java/Triangle/AbstractSyntaxTrees/IntTypeDenoter.java

@@ -22,10 +22,12 @@ public class IntTypeDenoter extends TypeDenoter {
     super(thePosition);
   }
 
+  @Override
 public Object visit(Visitor v, Object o) {
     return v.visitIntTypeDenoter(this, o);
   }
 
+  @Override
 public boolean equals(Object obj) {
     if (obj != null && obj instanceof ErrorTypeDenoter)
       return true;

Triangle.Compiler/src/main/java/Triangle/AbstractSyntaxTrees/IntegerExpression.java

@@ -23,6 +23,7 @@ public class IntegerExpression extends Expression {
     IL = ilAST;
   }
 
+  @Override
 public Object visit(Visitor v, Object o) {
     return v.visitIntegerExpression(this, o);
   }

Triangle.Compiler/src/main/java/Triangle/AbstractSyntaxTrees/IntegerLiteral.java

@@ -22,6 +22,7 @@ public class IntegerLiteral extends Terminal {
     super(theSpelling, thePosition);
   }
 
+  @Override
 public Object visit(Visitor v, Object o) {
     return v.visitIntegerLiteral(this, o);
   }

Triangle.Compiler/src/main/java/Triangle/AbstractSyntaxTrees/LetCommand.java

@@ -24,6 +24,7 @@ public class LetCommand extends Command {
     C = cAST;
   }
 
+  @Override
 public Object visit(Visitor v, Object o) {
     return v.visitLetCommand(this, o);
   }

Triangle.Compiler/src/main/java/Triangle/AbstractSyntaxTrees/LetExpression.java

@@ -24,6 +24,7 @@ public class LetExpression extends Expression {
     E = eAST;
   }
 
+  @Override
 public Object visit(Visitor v, Object o) {
     return v.visitLetExpression(this, o);
   }

Triangle.Compiler/src/main/java/Triangle/AbstractSyntaxTrees/MultipleActualParameterSequence.java

@@ -25,6 +25,7 @@ public class MultipleActualParameterSequence extends ActualParameterSequence {
     APS = apsAST;
   }
 
+  @Override
 public Object visit(Visitor v, Object o) {
     return v.visitMultipleActualParameterSequence(this, o);
   }

Triangle.Compiler/src/main/java/Triangle/AbstractSyntaxTrees/MultipleArrayAggregate.java

@@ -25,6 +25,7 @@ public class MultipleArrayAggregate extends ArrayAggregate {
     AA = aaAST;
   }
 
+  @Override
 public Object visit(Visitor v, Object o) {
     return v.visitMultipleArrayAggregate(this, o);
   }

Triangle.Compiler/src/main/java/Triangle/AbstractSyntaxTrees/MultipleFieldTypeDenoter.java

@@ -26,10 +26,12 @@ public class MultipleFieldTypeDenoter extends FieldTypeDenoter {
     FT = ftAST;
   }
 
+  @Override
 public Object visit(Visitor v, Object o) {
     return v.visitMultipleFieldTypeDenoter(this, o);
   }
 
+  @Override
 public boolean equals(Object obj) {
     if (obj != null && obj instanceof MultipleFieldTypeDenoter) {
       MultipleFieldTypeDenoter ft = (MultipleFieldTypeDenoter) obj;

Triangle.Compiler/src/main/java/Triangle/AbstractSyntaxTrees/MultipleFormalParameterSequence.java

@@ -25,10 +25,12 @@ public class MultipleFormalParameterSequence extends FormalParameterSequence {
     FPS = fpsAST;
   }
 
+  @Override
 public Object visit(Visitor v, Object o) {
     return v.visitMultipleFormalParameterSequence(this, o);
   }
 
+  @Override
 public boolean equals(Object fpsAST) {
     if (fpsAST instanceof MultipleFormalParameterSequence) {
       MultipleFormalParameterSequence mfpsAST = (MultipleFormalParameterSequence) fpsAST;

Triangle.Compiler/src/main/java/Triangle/AbstractSyntaxTrees/MultipleRecordAggregate.java

@@ -26,6 +26,7 @@ public class MultipleRecordAggregate extends RecordAggregate {
     RA = raAST;
   }
 
+  @Override
 public Object visit(Visitor v, Object o) {
     return v.visitMultipleRecordAggregate(this, o);
   }

Triangle.Compiler/src/main/java/Triangle/AbstractSyntaxTrees/Operator.java

@@ -23,6 +23,7 @@ public class Operator extends Terminal {
     decl = null;
   }
 
+  @Override
 public Object visit(Visitor v, Object o) {
     return v.visitOperator(this, o);
   }

Triangle.Compiler/src/main/java/Triangle/AbstractSyntaxTrees/ProcActualParameter.java

@@ -23,6 +23,7 @@ public class ProcActualParameter extends ActualParameter {
     I = iAST;
   }
 
+  @Override
 public Object visit(Visitor v, Object o) {
     return v.visitProcActualParameter(this, o);
   }

Triangle.Compiler/src/main/java/Triangle/AbstractSyntaxTrees/ProcDeclaration.java

@@ -26,6 +26,7 @@ public class ProcDeclaration extends Declaration {
     C = cAST;
   }
 
+  @Override
 public Object visit(Visitor v, Object o) {
     return v.visitProcDeclaration(this, o);
   }

Triangle.Compiler/src/main/java/Triangle/AbstractSyntaxTrees/ProcFormalParameter.java

@@ -25,6 +25,7 @@ public class ProcFormalParameter extends FormalParameter {
     FPS = fpsAST;
   }
 
+  @Override
 public Object visit(Visitor v, Object o) {
     return v.visitProcFormalParameter(this, o);
   }
@@ -32,6 +33,7 @@ public class ProcFormalParameter extends FormalParameter {
   public Identifier I;
   public FormalParameterSequence FPS;
 
+  @Override
 public boolean equals(Object fpAST) {
     if (fpAST instanceof ProcFormalParameter) {
       ProcFormalParameter pfpAST = (ProcFormalParameter) fpAST;

Triangle.Compiler/src/main/java/Triangle/AbstractSyntaxTrees/Program.java

@@ -23,6 +23,7 @@ public class Program extends AST {
     C = cAST;
   }
 
+  @Override
 public Object visit(Visitor v, Object o) {
     return v.visitProgram(this, o);
   }

Triangle.Compiler/src/main/java/Triangle/AbstractSyntaxTrees/RecordExpression.java

@@ -23,6 +23,7 @@ public class RecordExpression extends Expression {
     RA = raAST;
   }
 
+  @Override
 public Object visit(Visitor v, Object o) {
     return v.visitRecordExpression(this, o);
   }

Triangle.Compiler/src/main/java/Triangle/AbstractSyntaxTrees/RecordTypeDenoter.java

@@ -23,10 +23,12 @@ public class RecordTypeDenoter extends TypeDenoter {
     FT = ftAST;
   }
 
+  @Override
 public Object visit(Visitor v, Object o) {
     return v.visitRecordTypeDenoter(this, o);
   }
 
+  @Override
 public boolean equals(Object obj) {
     if (obj != null && obj instanceof ErrorTypeDenoter)
       return true;

Triangle.Compiler/src/main/java/Triangle/AbstractSyntaxTrees/SequentialCommand.java

@@ -24,6 +24,7 @@ public class SequentialCommand extends Command {
     C2 = c2AST;
   }
 
+  @Override
 public Object visit(Visitor v, Object o) {
     return v.visitSequentialCommand(this, o);
   }

Triangle.Compiler/src/main/java/Triangle/AbstractSyntaxTrees/SequentialDeclaration.java

@@ -25,6 +25,7 @@ public class SequentialDeclaration extends Declaration {
     D2 = d2AST;
   }
 
+  @Override
 public Object visit(Visitor v, Object o) {
     return v.visitSequentialDeclaration(this, o);
   }

Triangle.Compiler/src/main/java/Triangle/AbstractSyntaxTrees/SimpleTypeDenoter.java

@@ -23,10 +23,12 @@ public class SimpleTypeDenoter extends TypeDenoter {
     I = iAST;
   }
 
+  @Override
 public Object visit(Visitor v, Object o) {
     return v.visitSimpleTypeDenoter(this, o);
   }
 
+  @Override
 public boolean equals(Object obj) {
     return false; // should not happen
   }

Triangle.Compiler/src/main/java/Triangle/AbstractSyntaxTrees/SimpleVname.java

@@ -23,6 +23,7 @@ public class SimpleVname extends Vname {
     I = iAST;
   }
 
+  @Override
 public Object visit(Visitor v, Object o) {
     return v.visitSimpleVname(this, o);
   }

Triangle.Compiler/src/main/java/Triangle/AbstractSyntaxTrees/SingleActualParameterSequence.java

@@ -24,6 +24,7 @@ public class SingleActualParameterSequence extends ActualParameterSequence {
     AP = apAST;
   }
 
+  @Override
 public Object visit(Visitor v, Object o) {
     return v.visitSingleActualParameterSequence(this, o);
   }

Triangle.Compiler/src/main/java/Triangle/AbstractSyntaxTrees/SingleArrayAggregate.java

@@ -24,6 +24,7 @@ public class SingleArrayAggregate extends ArrayAggregate {
     E = eAST;
   }
 
+  @Override
 public Object visit(Visitor v, Object o) {
     return v.visitSingleArrayAggregate(this, o);
   }

Triangle.Compiler/src/main/java/Triangle/AbstractSyntaxTrees/SingleFieldTypeDenoter.java

@@ -25,10 +25,12 @@ public class SingleFieldTypeDenoter extends FieldTypeDenoter {
     T = tAST;
   }
 
+  @Override
 public Object visit(Visitor v, Object o) {
     return v.visitSingleFieldTypeDenoter(this, o);
   }
 
+  @Override
 public boolean equals(Object obj) {
     if (obj != null && obj instanceof SingleFieldTypeDenoter) {
       SingleFieldTypeDenoter ft = (SingleFieldTypeDenoter) obj;

Triangle.Compiler/src/main/java/Triangle/AbstractSyntaxTrees/SingleFormalParameterSequence.java

@@ -24,10 +24,12 @@ public class SingleFormalParameterSequence extends FormalParameterSequence {
     FP = fpAST;
   }
 
+  @Override
 public Object visit(Visitor v, Object o) {
     return v.visitSingleFormalParameterSequence(this, o);
   }
 
+  @Override
 public boolean equals(Object fpsAST) {
     if (fpsAST instanceof SingleFormalParameterSequence) {
       SingleFormalParameterSequence sfpsAST = (SingleFormalParameterSequence) fpsAST;

Triangle.Compiler/src/main/java/Triangle/AbstractSyntaxTrees/SingleRecordAggregate.java

@@ -25,6 +25,7 @@ public class SingleRecordAggregate extends RecordAggregate {
     E = eAST;
   }
 
+  @Override
 public Object visit(Visitor v, Object o) {
     return v.visitSingleRecordAggregate(this, o);
   }

Triangle.Compiler/src/main/java/Triangle/AbstractSyntaxTrees/SubscriptVname.java

@@ -24,6 +24,7 @@ public class SubscriptVname extends Vname {
     E = eAST;
   }
 
+  @Override
 public Object visit(Visitor v, Object o) {
     return v.visitSubscriptVname(this, o);
   }

Triangle.Compiler/src/main/java/Triangle/AbstractSyntaxTrees/TypeDeclaration.java

@@ -25,6 +25,7 @@ public class TypeDeclaration extends Declaration {
     T = tAST;
   }
 
+  @Override
 public Object visit(Visitor v, Object o) {
     return v.visitTypeDeclaration(this, o);
   }

Triangle.Compiler/src/main/java/Triangle/AbstractSyntaxTrees/TypeDenoter.java

@@ -22,6 +22,7 @@ public abstract class TypeDenoter extends AST {
     super(thePosition);
   }
 
+  @Override
 public abstract boolean equals(Object obj);
 
 }

Triangle.Compiler/src/main/java/Triangle/AbstractSyntaxTrees/UnaryExpression.java

@@ -25,6 +25,7 @@ public class UnaryExpression extends Expression {
     E = eAST;
   }
 
+  @Override
 public Object visit(Visitor v, Object o) {
     return v.visitUnaryExpression(this, o);
   }

Triangle.Compiler/src/main/java/Triangle/AbstractSyntaxTrees/UnaryOperatorDeclaration.java

@@ -26,6 +26,7 @@ public class UnaryOperatorDeclaration extends Declaration {
     RES = resultAST;
   }
 
+  @Override
 public Object visit(Visitor v, Object o) {
     return v.visitUnaryOperatorDeclaration(this, o);
   }

Triangle.Compiler/src/main/java/Triangle/AbstractSyntaxTrees/VarActualParameter.java

@@ -23,6 +23,7 @@ public class VarActualParameter extends ActualParameter {
     V = vAST;
   }
 
+  @Override
 public Object visit(Visitor v, Object o) {
     return v.visitVarActualParameter(this, o);
   }

Triangle.Compiler/src/main/java/Triangle/AbstractSyntaxTrees/VarDeclaration.java

@@ -25,6 +25,7 @@ public class VarDeclaration extends Declaration {
     T = tAST;
   }
 
+  @Override
 public Object visit(Visitor v, Object o) {
     return v.visitVarDeclaration(this, o);
   }

Triangle.Compiler/src/main/java/Triangle/AbstractSyntaxTrees/VarFormalParameter.java

@@ -25,6 +25,7 @@ public class VarFormalParameter extends FormalParameter {
     T = tAST;
   }
 
+  @Override
 public Object visit(Visitor v, Object o) {
     return v.visitVarFormalParameter(this, o);
   }
@@ -32,6 +33,7 @@ public class VarFormalParameter extends FormalParameter {
   public Identifier I;
   public TypeDenoter T;
 
+  @Override
 public boolean equals(Object fpAST) {
     if (fpAST instanceof VarFormalParameter) {
       VarFormalParameter vfpAST = (VarFormalParameter) fpAST;

Triangle.Compiler/src/main/java/Triangle/AbstractSyntaxTrees/VnameExpression.java

@@ -23,6 +23,7 @@ public class VnameExpression extends Expression {
     V = vAST;
   }
 
+  @Override
 public Object visit(Visitor v, Object o) {
     return v.visitVnameExpression(this, o);
   }

Triangle.Compiler/src/main/java/Triangle/AbstractSyntaxTrees/WhileCommand.java

@@ -24,6 +24,7 @@ public class WhileCommand extends Command {
     C = cAST;
   }
 
+  @Override
 public Object visit(Visitor v, Object o) {
     return v.visitWhileCommand(this, o);
   }

Triangle.Compiler/src/main/java/Triangle/CodeGenerator/Encoder.java

@@ -93,6 +93,7 @@ import Triangle.AbstractSyntaxTrees.WhileCommand;
 public final class Encoder implements Visitor {
 
   // Commands
+  @Override
 public Object visitAssignCommand(AssignCommand ast, Object o) {
     Frame frame = (Frame) o;
     Integer valSize = (Integer) ast.E.visit(this, frame);
@@ -101,6 +102,7 @@ public final class Encoder implements Visitor {
     return null;
   }
 
+  @Override
 public Object visitCallCommand(CallCommand ast, Object o) {
     Frame frame = (Frame) o;
     Integer argsSize = (Integer) ast.APS.visit(this, frame);
@@ -108,10 +110,12 @@ public final class Encoder implements Visitor {
     return null;
   }
 
+  @Override
 public Object visitEmptyCommand(EmptyCommand ast, Object o) {
     return null;
   }
 
+  @Override
 public Object visitIfCommand(IfCommand ast, Object o) {
     Frame frame = (Frame) o;
     int jumpifAddr, jumpAddr;
@@ -128,6 +132,7 @@ public final class Encoder implements Visitor {
     return null;
   }
 
+  @Override
 public Object visitLetCommand(LetCommand ast, Object o) {
     Frame frame = (Frame) o;
     int extraSize = ((Integer) ast.D.visit(this, frame)).intValue();
@@ -137,12 +142,14 @@ public final class Encoder implements Visitor {
     return null;
   }
 
+  @Override
 public Object visitSequentialCommand(SequentialCommand ast, Object o) {
     ast.C1.visit(this, o);
     ast.C2.visit(this, o);
     return null;
   }
 
+  @Override
 public Object visitWhileCommand(WhileCommand ast, Object o) {
     Frame frame = (Frame) o;
     int jumpAddr, loopAddr;
@@ -158,11 +165,13 @@ public final class Encoder implements Visitor {
   }
 
   // Expressions
+  @Override
 public Object visitArrayExpression(ArrayExpression ast, Object o) {
     ast.type.visit(this, null);
     return ast.AA.visit(this, o);
   }
 
+  @Override
 public Object visitBinaryExpression(BinaryExpression ast, Object o) {
     Frame frame = (Frame) o;
     Integer valSize = (Integer) ast.type.visit(this, null);
@@ -174,6 +183,7 @@ public final class Encoder implements Visitor {
     return valSize;
   }
 
+  @Override
 public Object visitCallExpression(CallExpression ast, Object o) {
     Frame frame = (Frame) o;
     Integer valSize = (Integer) ast.type.visit(this, null);
@@ -182,6 +192,7 @@ public final class Encoder implements Visitor {
     return valSize;
   }
 
+  @Override
 public Object visitCharacterExpression(CharacterExpression ast,
       Object o) {
     Frame frame = (Frame) o;
@@ -190,10 +201,12 @@ public final class Encoder implements Visitor {
     return valSize;
   }
 
+  @Override
 public Object visitEmptyExpression(EmptyExpression ast, Object o) {
     return new Integer(0);
   }
 
+  @Override
 public Object visitIfExpression(IfExpression ast, Object o) {
     Frame frame = (Frame) o;
     Integer valSize;
@@ -212,6 +225,7 @@ public final class Encoder implements Visitor {
     return valSize;
   }
 
+  @Override
 public Object visitIntegerExpression(IntegerExpression ast, Object o) {
     Frame frame = (Frame) o;
     Integer valSize = (Integer) ast.type.visit(this, null);
@@ -219,6 +233,7 @@ public final class Encoder implements Visitor {
     return valSize;
   }
 
+  @Override
 public Object visitLetExpression(LetExpression ast, Object o) {
     Frame frame = (Frame) o;
     ast.type.visit(this, null);
@@ -230,11 +245,13 @@ public final class Encoder implements Visitor {
     return valSize;
   }
 
+  @Override
 public Object visitRecordExpression(RecordExpression ast, Object o) {
     ast.type.visit(this, null);
     return ast.RA.visit(this, o);
   }
 
+  @Override
 public Object visitUnaryExpression(UnaryExpression ast, Object o) {
     Frame frame = (Frame) o;
     Integer valSize = (Integer) ast.type.visit(this, null);
@@ -243,6 +260,7 @@ public final class Encoder implements Visitor {
     return valSize;
   }
 
+  @Override
 public Object visitVnameExpression(VnameExpression ast, Object o) {
     Frame frame = (Frame) o;
     Integer valSize = (Integer) ast.type.visit(this, null);
@@ -251,11 +269,13 @@ public final class Encoder implements Visitor {
   }
 
   // Declarations
+  @Override
 public Object visitBinaryOperatorDeclaration(BinaryOperatorDeclaration ast,
       Object o) {
     return new Integer(0);
   }
 
+  @Override
 public Object visitConstDeclaration(ConstDeclaration ast, Object o) {
     Frame frame = (Frame) o;
     int extraSize = 0;
@@ -277,6 +297,7 @@ public final class Encoder implements Visitor {
     return new Integer(extraSize);
   }
 
+  @Override
 public Object visitFuncDeclaration(FuncDeclaration ast, Object o) {
     Frame frame = (Frame) o;
     int jumpAddr = nextInstrAddr;
@@ -298,6 +319,7 @@ public final class Encoder implements Visitor {
     return new Integer(0);
   }
 
+  @Override
 public Object visitProcDeclaration(ProcDeclaration ast, Object o) {
     Frame frame = (Frame) o;
     int jumpAddr = nextInstrAddr;
@@ -320,6 +342,7 @@ public final class Encoder implements Visitor {
     return new Integer(0);
   }
 
+  @Override
 public Object visitSequentialDeclaration(SequentialDeclaration ast, Object o) {
     Frame frame = (Frame) o;
     int extraSize1, extraSize2;
@@ -330,17 +353,20 @@ public final class Encoder implements Visitor {
     return new Integer(extraSize1 + extraSize2);
   }
 
+  @Override
 public Object visitTypeDeclaration(TypeDeclaration ast, Object o) {
     // just to ensure the type's representation is decided
     ast.T.visit(this, null);
     return new Integer(0);
   }
 
+  @Override
 public Object visitUnaryOperatorDeclaration(UnaryOperatorDeclaration ast,
       Object o) {
     return new Integer(0);
   }
 
+  @Override
 public Object visitVarDeclaration(VarDeclaration ast, Object o) {
     Frame frame = (Frame) o;
     int extraSize;
@@ -353,6 +379,7 @@ public final class Encoder implements Visitor {
   }
 
   // Array Aggregates
+  @Override
 public Object visitMultipleArrayAggregate(MultipleArrayAggregate ast,
       Object o) {
     Frame frame = (Frame) o;
@@ -362,11 +389,13 @@ public final class Encoder implements Visitor {
     return new Integer(elemSize + arraySize);
   }
 
+  @Override
 public Object visitSingleArrayAggregate(SingleArrayAggregate ast, Object o) {
     return ast.E.visit(this, o);
   }
 
   // Record Aggregates
+  @Override
 public Object visitMultipleRecordAggregate(MultipleRecordAggregate ast,
       Object o) {
     Frame frame = (Frame) o;
@@ -376,12 +405,14 @@ public final class Encoder implements Visitor {
     return new Integer(fieldSize + recordSize);
   }
 
+  @Override
 public Object visitSingleRecordAggregate(SingleRecordAggregate ast,
       Object o) {
     return ast.E.visit(this, o);
   }
 
   // Formal Parameters
+  @Override
 public Object visitConstFormalParameter(ConstFormalParameter ast, Object o) {
     Frame frame = (Frame) o;
     int valSize = ((Integer) ast.T.visit(this, null)).intValue();
@@ -390,6 +421,7 @@ public final class Encoder implements Visitor {
     return new Integer(valSize);
   }
 
+  @Override
 public Object visitFuncFormalParameter(FuncFormalParameter ast, Object o) {
     Frame frame = (Frame) o;
     int argsSize = Machine.closureSize;
@@ -399,6 +431,7 @@ public final class Encoder implements Visitor {
     return new Integer(argsSize);
   }
 
+  @Override
 public Object visitProcFormalParameter(ProcFormalParameter ast, Object o) {
     Frame frame = (Frame) o;
     int argsSize = Machine.closureSize;
@@ -408,6 +441,7 @@ public final class Encoder implements Visitor {
     return new Integer(argsSize);
   }
 
+  @Override
 public Object visitVarFormalParameter(VarFormalParameter ast, Object o) {
     Frame frame = (Frame) o;
     ast.T.visit(this, null);
@@ -417,11 +451,13 @@ public final class Encoder implements Visitor {
     return new Integer(Machine.addressSize);
   }
 
+  @Override
 public Object visitEmptyFormalParameterSequence(
       EmptyFormalParameterSequence ast, Object o) {
     return new Integer(0);
   }
 
+  @Override
 public Object visitMultipleFormalParameterSequence(
       MultipleFormalParameterSequence ast, Object o) {
     Frame frame = (Frame) o;
@@ -431,16 +467,19 @@ public final class Encoder implements Visitor {
     return new Integer(argsSize1 + argsSize2);
   }
 
+  @Override
 public Object visitSingleFormalParameterSequence(
       SingleFormalParameterSequence ast, Object o) {
     return ast.FP.visit(this, o);
   }
 
   // Actual Parameters
+  @Override
 public Object visitConstActualParameter(ConstActualParameter ast, Object o) {
     return ast.E.visit(this, o);
   }
 
+  @Override
 public Object visitFuncActualParameter(FuncActualParameter ast, Object o) {
     Frame frame = (Frame) o;
     if (ast.I.decl.entity instanceof KnownRoutine) {
@@ -461,6 +500,7 @@ public final class Encoder implements Visitor {
     return new Integer(Machine.closureSize);
   }
 
+  @Override
 public Object visitProcActualParameter(ProcActualParameter ast, Object o) {
     Frame frame = (Frame) o;
     if (ast.I.decl.entity instanceof KnownRoutine) {
@@ -481,16 +521,19 @@ public final class Encoder implements Visitor {
     return new Integer(Machine.closureSize);
   }
 
+  @Override
 public Object visitVarActualParameter(VarActualParameter ast, Object o) {
     encodeFetchAddress(ast.V, (Frame) o);
     return new Integer(Machine.addressSize);
   }
 
+  @Override
 public Object visitEmptyActualParameterSequence(
       EmptyActualParameterSequence ast, Object o) {
     return new Integer(0);
   }
 
+  @Override
 public Object visitMultipleActualParameterSequence(
       MultipleActualParameterSequence ast, Object o) {
     Frame frame = (Frame) o;
@@ -500,16 +543,19 @@ public final class Encoder implements Visitor {
     return new Integer(argsSize1 + argsSize2);
   }
 
+  @Override
 public Object visitSingleActualParameterSequence(
       SingleActualParameterSequence ast, Object o) {
     return ast.AP.visit(this, o);
   }
 
   // Type Denoters
+  @Override
 public Object visitAnyTypeDenoter(AnyTypeDenoter ast, Object o) {
     return new Integer(0);
   }
 
+  @Override
 public Object visitArrayTypeDenoter(ArrayTypeDenoter ast, Object o) {
     int typeSize;
     if (ast.entity == null) {
@@ -522,6 +568,7 @@ public final class Encoder implements Visitor {
     return new Integer(typeSize);
   }
 
+  @Override
 public Object visitBoolTypeDenoter(BoolTypeDenoter ast, Object o) {
     if (ast.entity == null) {
       ast.entity = new TypeRepresentation(Machine.booleanSize);
@@ -530,6 +577,7 @@ public final class Encoder implements Visitor {
     return new Integer(Machine.booleanSize);
   }
 
+  @Override
 public Object visitCharTypeDenoter(CharTypeDenoter ast, Object o) {
     if (ast.entity == null) {
       ast.entity = new TypeRepresentation(Machine.characterSize);
@@ -538,15 +586,18 @@ public final class Encoder implements Visitor {
     return new Integer(Machine.characterSize);
   }
 
+  @Override
 public Object visitErrorTypeDenoter(ErrorTypeDenoter ast, Object o) {
     return new Integer(0);
   }
 
+  @Override
 public Object visitSimpleTypeDenoter(SimpleTypeDenoter ast,
       Object o) {
     return new Integer(0);
   }
 
+  @Override
 public Object visitIntTypeDenoter(IntTypeDenoter ast, Object o) {
     if (ast.entity == null) {
       ast.entity = new TypeRepresentation(Machine.integerSize);
@@ -555,6 +606,7 @@ public final class Encoder implements Visitor {
     return new Integer(Machine.integerSize);
   }
 
+  @Override
 public Object visitRecordTypeDenoter(RecordTypeDenoter ast, Object o) {
     int typeSize;
     if (ast.entity == null) {
@@ -566,6 +618,7 @@ public final class Encoder implements Visitor {
     return new Integer(typeSize);
   }
 
+  @Override
 public Object visitMultipleFieldTypeDenoter(MultipleFieldTypeDenoter ast,
       Object o) {
     int offset = ((Integer) o).intValue();
@@ -583,6 +636,7 @@ public final class Encoder implements Visitor {
     return new Integer(fieldSize + recSize);
   }
 
+  @Override
 public Object visitSingleFieldTypeDenoter(SingleFieldTypeDenoter ast,
       Object o) {
     int offset = ((Integer) o).intValue();
@@ -599,10 +653,12 @@ public final class Encoder implements Visitor {
   }
 
   // Literals, Identifiers and Operators
+  @Override
 public Object visitCharacterLiteral(CharacterLiteral ast, Object o) {
     return null;
   }
 
+  @Override
 public Object visitIdentifier(Identifier ast, Object o) {
     Frame frame = (Frame) o;
     if (ast.decl.entity instanceof KnownRoutine) {
@@ -626,10 +682,12 @@ public final class Encoder implements Visitor {
     return null;
   }
 
+  @Override
 public Object visitIntegerLiteral(IntegerLiteral ast, Object o) {
     return null;
   }
 
+  @Override
 public Object visitOperator(Operator ast, Object o) {
     Frame frame = (Frame) o;
     if (ast.decl.entity instanceof KnownRoutine) {
@@ -654,6 +712,7 @@ public final class Encoder implements Visitor {
   }
 
   // Value-or-variable names
+  @Override
 public Object visitDotVname(DotVname ast, Object o) {
     Frame frame = (Frame) o;
     RuntimeEntity baseObject = (RuntimeEntity) ast.V.visit(this, frame);
@@ -663,12 +722,14 @@ public final class Encoder implements Visitor {
     return baseObject;
   }
 
+  @Override
 public Object visitSimpleVname(SimpleVname ast, Object o) {
     ast.offset = 0;
     ast.indexed = false;
     return ast.I.decl.entity;
   }
 
+  @Override
 public Object visitSubscriptVname(SubscriptVname ast, Object o) {
     Frame frame = (Frame) o;
     RuntimeEntity baseObject;
@@ -700,6 +761,7 @@ public final class Encoder implements Visitor {
   }
 
   // Programs
+  @Override
 public Object visitProgram(Program ast, Object o) {
     return ast.C.visit(this, o);
   }

Triangle.Compiler/src/main/java/Triangle/ContextualAnalyzer/Checker.java

@@ -93,6 +93,7 @@ public final class Checker implements Visitor {
 
   // Always returns null. Does not use the given object.
 
+  @Override
 public Object visitAssignCommand(AssignCommand ast, Object o) {
     TypeDenoter vType = (TypeDenoter) ast.V.visit(this, null);
     TypeDenoter eType = (TypeDenoter) ast.E.visit(this, null);
@@ -103,6 +104,7 @@ public final class Checker implements Visitor {
     return null;
   }
 
+  @Override
 public Object visitCallCommand(CallCommand ast, Object o) {
 
     Declaration binding = (Declaration) ast.I.visit(this, null);
@@ -118,10 +120,12 @@ public final class Checker implements Visitor {
     return null;
   }
 
+  @Override
 public Object visitEmptyCommand(EmptyCommand ast, Object o) {
     return null;
   }
 
+  @Override
 public Object visitIfCommand(IfCommand ast, Object o) {
     TypeDenoter eType = (TypeDenoter) ast.E.visit(this, null);
     if (!eType.equals(StdEnvironment.booleanType))
@@ -131,6 +135,7 @@ public final class Checker implements Visitor {
     return null;
   }
 
+  @Override
 public Object visitLetCommand(LetCommand ast, Object o) {
     idTable.openScope();
     ast.D.visit(this, null);
@@ -139,12 +144,14 @@ public final class Checker implements Visitor {
     return null;
   }
 
+  @Override
 public Object visitSequentialCommand(SequentialCommand ast, Object o) {
     ast.C1.visit(this, null);
     ast.C2.visit(this, null);
     return null;
   }
 
+  @Override
 public Object visitWhileCommand(WhileCommand ast, Object o) {
     TypeDenoter eType = (TypeDenoter) ast.E.visit(this, null);
     if (!eType.equals(StdEnvironment.booleanType))
@@ -158,6 +165,7 @@ public final class Checker implements Visitor {
   // Returns the TypeDenoter denoting the type of the expression. Does
   // not use the given object.
 
+  @Override
 public Object visitArrayExpression(ArrayExpression ast, Object o) {
     TypeDenoter elemType = (TypeDenoter) ast.AA.visit(this, null);
     IntegerLiteral il = new IntegerLiteral(new Integer(ast.AA.elemCount).toString(),
@@ -166,6 +174,7 @@ public final class Checker implements Visitor {
     return ast.type;
   }
 
+  @Override
 public Object visitBinaryExpression(BinaryExpression ast, Object o) {
 
     TypeDenoter e1Type = (TypeDenoter) ast.E1.visit(this, null);
@@ -195,6 +204,7 @@ public final class Checker implements Visitor {
     return ast.type;
   }
 
+  @Override
 public Object visitCallExpression(CallExpression ast, Object o) {
     Declaration binding = (Declaration) ast.I.visit(this, null);
     if (binding == null) {
@@ -212,16 +222,19 @@ public final class Checker implements Visitor {
     return ast.type;
   }
 
+  @Override
 public Object visitCharacterExpression(CharacterExpression ast, Object o) {
     ast.type = StdEnvironment.charType;
     return ast.type;
   }
 
+  @Override
 public Object visitEmptyExpression(EmptyExpression ast, Object o) {
     ast.type = null;
     return ast.type;
   }
 
+  @Override
 public Object visitIfExpression(IfExpression ast, Object o) {
     TypeDenoter e1Type = (TypeDenoter) ast.E1.visit(this, null);
     if (!e1Type.equals(StdEnvironment.booleanType))
@@ -235,11 +248,13 @@ public final class Checker implements Visitor {
     return ast.type;
   }
 
+  @Override
 public Object visitIntegerExpression(IntegerExpression ast, Object o) {
     ast.type = StdEnvironment.integerType;
     return ast.type;
   }
 
+  @Override
 public Object visitLetExpression(LetExpression ast, Object o) {
     idTable.openScope();
     ast.D.visit(this, null);
@@ -248,12 +263,14 @@ public final class Checker implements Visitor {
     return ast.type;
   }
 
+  @Override
 public Object visitRecordExpression(RecordExpression ast, Object o) {
     FieldTypeDenoter rType = (FieldTypeDenoter) ast.RA.visit(this, null);
     ast.type = new RecordTypeDenoter(rType, ast.position);
     return ast.type;
   }
 
+  @Override
 public Object visitUnaryExpression(UnaryExpression ast, Object o) {
 
     TypeDenoter eType = (TypeDenoter) ast.E.visit(this, null);
@@ -274,6 +291,7 @@ public final class Checker implements Visitor {
     return ast.type;
   }
 
+  @Override
 public Object visitVnameExpression(VnameExpression ast, Object o) {
     ast.type = (TypeDenoter) ast.V.visit(this, null);
     return ast.type;
@@ -282,10 +300,12 @@ public final class Checker implements Visitor {
   // Declarations
 
   // Always returns null. Does not use the given object.
+  @Override
 public Object visitBinaryOperatorDeclaration(BinaryOperatorDeclaration ast, Object o) {
     return null;
   }
 
+  @Override
 public Object visitConstDeclaration(ConstDeclaration ast, Object o) {
     TypeDenoter eType = (TypeDenoter) ast.E.visit(this, null);
     idTable.enter(ast.I.spelling, ast);
@@ -295,6 +315,7 @@ public final class Checker implements Visitor {
     return null;
   }
 
+  @Override
 public Object visitFuncDeclaration(FuncDeclaration ast, Object o) {
     ast.T = (TypeDenoter) ast.T.visit(this, null);
     idTable.enter(ast.I.spelling, ast); // permits recursion
@@ -311,6 +332,7 @@ public final class Checker implements Visitor {
     return null;
   }
 
+  @Override
 public Object visitProcDeclaration(ProcDeclaration ast, Object o) {
     idTable.enter(ast.I.spelling, ast); // permits recursion
     if (ast.duplicated)
@@ -323,12 +345,14 @@ public final class Checker implements Visitor {
     return null;
   }
 
+  @Override
 public Object visitSequentialDeclaration(SequentialDeclaration ast, Object o) {
     ast.D1.visit(this, null);
     ast.D2.visit(this, null);
     return null;
   }
 
+  @Override
 public Object visitTypeDeclaration(TypeDeclaration ast, Object o) {
     ast.T = (TypeDenoter) ast.T.visit(this, null);
     idTable.enter(ast.I.spelling, ast);
@@ -338,10 +362,12 @@ public final class Checker implements Visitor {
     return null;
   }
 
+  @Override
 public Object visitUnaryOperatorDeclaration(UnaryOperatorDeclaration ast, Object o) {
     return null;
   }
 
+  @Override
 public Object visitVarDeclaration(VarDeclaration ast, Object o) {
     ast.T = (TypeDenoter) ast.T.visit(this, null);
     idTable.enter(ast.I.spelling, ast);
@@ -357,6 +383,7 @@ public final class Checker implements Visitor {
   // Returns the TypeDenoter for the Array Aggregate. Does not use the
   // given object.
 
+  @Override
 public Object visitMultipleArrayAggregate(MultipleArrayAggregate ast, Object o) {
     TypeDenoter eType = (TypeDenoter) ast.E.visit(this, null);
     TypeDenoter elemType = (TypeDenoter) ast.AA.visit(this, null);
@@ -366,6 +393,7 @@ public final class Checker implements Visitor {
     return elemType;
   }
 
+  @Override
 public Object visitSingleArrayAggregate(SingleArrayAggregate ast, Object o) {
     TypeDenoter elemType = (TypeDenoter) ast.E.visit(this, null);
     ast.elemCount = 1;
@@ -377,6 +405,7 @@ public final class Checker implements Visitor {
   // Returns the TypeDenoter for the Record Aggregate. Does not use the
   // given object.
 
+  @Override
 public Object visitMultipleRecordAggregate(MultipleRecordAggregate ast, Object o) {
     TypeDenoter eType = (TypeDenoter) ast.E.visit(this, null);
     FieldTypeDenoter rType = (FieldTypeDenoter) ast.RA.visit(this, null);
@@ -388,6 +417,7 @@ public final class Checker implements Visitor {
     return ast.type;
   }
 
+  @Override
 public Object visitSingleRecordAggregate(SingleRecordAggregate ast, Object o) {
     TypeDenoter eType = (TypeDenoter) ast.E.visit(this, null);
     ast.type = new SingleFieldTypeDenoter(ast.I, eType, ast.position);
@@ -398,6 +428,7 @@ public final class Checker implements Visitor {
 
   // Always returns null. Does not use the given object.
 
+  @Override
 public Object visitConstFormalParameter(ConstFormalParameter ast, Object o) {
     ast.T = (TypeDenoter) ast.T.visit(this, null);
     idTable.enter(ast.I.spelling, ast);
@@ -407,6 +438,7 @@ public final class Checker implements Visitor {
     return null;
   }
 
+  @Override
 public Object visitFuncFormalParameter(FuncFormalParameter ast, Object o) {
     idTable.openScope();
     ast.FPS.visit(this, null);
@@ -419,6 +451,7 @@ public final class Checker implements Visitor {
     return null;
   }
 
+  @Override
 public Object visitProcFormalParameter(ProcFormalParameter ast, Object o) {
     idTable.openScope();
     ast.FPS.visit(this, null);
@@ -430,6 +463,7 @@ public final class Checker implements Visitor {
     return null;
   }
 
+  @Override
 public Object visitVarFormalParameter(VarFormalParameter ast, Object o) {
     ast.T = (TypeDenoter) ast.T.visit(this, null);
     idTable.enter(ast.I.spelling, ast);
@@ -439,16 +473,19 @@ public final class Checker implements Visitor {
     return null;
   }
 
+  @Override
 public Object visitEmptyFormalParameterSequence(EmptyFormalParameterSequence ast, Object o) {
     return null;
   }
 
+  @Override
 public Object visitMultipleFormalParameterSequence(MultipleFormalParameterSequence ast, Object o) {
     ast.FP.visit(this, null);
     ast.FPS.visit(this, null);
     return null;
   }
 
+  @Override
 public Object visitSingleFormalParameterSequence(SingleFormalParameterSequence ast, Object o) {
     ast.FP.visit(this, null);
     return null;
@@ -458,6 +495,7 @@ public final class Checker implements Visitor {
 
   // Always returns null. Uses the given FormalParameter.
 
+  @Override
 public Object visitConstActualParameter(ConstActualParameter ast, Object o) {
     FormalParameter fp = (FormalParameter) o;
     TypeDenoter eType = (TypeDenoter) ast.E.visit(this, null);
@@ -471,6 +509,7 @@ public final class Checker implements Visitor {
     return null;
   }
 
+  @Override
 public Object visitFuncActualParameter(FuncActualParameter ast, Object o) {
     FormalParameter fp = (FormalParameter) o;
 
@@ -504,6 +543,7 @@ public final class Checker implements Visitor {
     return null;
   }
 
+  @Override
 public Object visitProcActualParameter(ProcActualParameter ast, Object o) {
     FormalParameter fp = (FormalParameter) o;
 
@@ -530,6 +570,7 @@ public final class Checker implements Visitor {
     return null;
   }
 
+  @Override
 public Object visitVarActualParameter(VarActualParameter ast, Object o) {
     FormalParameter fp = (FormalParameter) o;
 
@@ -546,6 +587,7 @@ public final class Checker implements Visitor {
     return null;
   }
 
+  @Override
 public Object visitEmptyActualParameterSequence(EmptyActualParameterSequence ast, Object o) {
     FormalParameterSequence fps = (FormalParameterSequence) o;
     if (!(fps instanceof EmptyFormalParameterSequence))
@@ -553,6 +595,7 @@ public final class Checker implements Visitor {
     return null;
   }
 
+  @Override
 public Object visitMultipleActualParameterSequence(MultipleActualParameterSequence ast, Object o) {
     FormalParameterSequence fps = (FormalParameterSequence) o;
     if (!(fps instanceof MultipleFormalParameterSequence))
@@ -564,6 +607,7 @@ public final class Checker implements Visitor {
     return null;
   }
 
+  @Override
 public Object visitSingleActualParameterSequence(SingleActualParameterSequence ast, Object o) {
     FormalParameterSequence fps = (FormalParameterSequence) o;
     if (!(fps instanceof SingleFormalParameterSequence))
@@ -579,10 +623,12 @@ public final class Checker implements Visitor {
   // Returns the expanded version of the TypeDenoter. Does not
   // use the given object.
 
+  @Override
 public Object visitAnyTypeDenoter(AnyTypeDenoter ast, Object o) {
     return StdEnvironment.anyType;
   }
 
+  @Override
 public Object visitArrayTypeDenoter(ArrayTypeDenoter ast, Object o) {
     ast.T = (TypeDenoter) ast.T.visit(this, null);
     if ((Integer.valueOf(ast.IL.spelling).intValue()) == 0)
@@ -590,18 +636,22 @@ public final class Checker implements Visitor {
     return ast;
   }
 
+  @Override
 public Object visitBoolTypeDenoter(BoolTypeDenoter ast, Object o) {
     return StdEnvironment.booleanType;
   }
 
+  @Override
 public Object visitCharTypeDenoter(CharTypeDenoter ast, Object o) {
     return StdEnvironment.charType;
   }
 
+  @Override
 public Object visitErrorTypeDenoter(ErrorTypeDenoter ast, Object o) {
     return StdEnvironment.errorType;
   }
 
+  @Override
 public Object visitSimpleTypeDenoter(SimpleTypeDenoter ast, Object o) {
     Declaration binding = (Declaration) ast.I.visit(this, null);
     if (binding == null) {
@@ -615,31 +665,37 @@ public final class Checker implements Visitor {
     return ((TypeDeclaration) binding).T;
   }
 
+  @Override
 public Object visitIntTypeDenoter(IntTypeDenoter ast, Object o) {
     return StdEnvironment.integerType;
   }
 
+  @Override
 public Object visitRecordTypeDenoter(RecordTypeDenoter ast, Object o) {
     ast.FT = (FieldTypeDenoter) ast.FT.visit(this, null);
     return ast;
   }
 
+  @Override
 public Object visitMultipleFieldTypeDenoter(MultipleFieldTypeDenoter ast, Object o) {
     ast.T = (TypeDenoter) ast.T.visit(this, null);
     ast.FT.visit(this, null);
     return ast;
   }
 
+  @Override
 public Object visitSingleFieldTypeDenoter(SingleFieldTypeDenoter ast, Object o) {
     ast.T = (TypeDenoter) ast.T.visit(this, null);
     return ast;
   }
 
   // Literals, Identifiers and Operators
+  @Override
 public Object visitCharacterLiteral(CharacterLiteral CL, Object o) {
     return StdEnvironment.charType;
   }
 
+  @Override
 public Object visitIdentifier(Identifier I, Object o) {
     Declaration binding = idTable.retrieve(I.spelling);
     if (binding != null)
@@ -647,10 +703,12 @@ public final class Checker implements Visitor {
     return binding;
   }
 
+  @Override
 public Object visitIntegerLiteral(IntegerLiteral IL, Object o) {
     return StdEnvironment.integerType;
   }
 
+  @Override
 public Object visitOperator(Operator O, Object o) {
     Declaration binding = idTable.retrieve(O.spelling);
     if (binding != null)
@@ -679,6 +737,7 @@ public final class Checker implements Visitor {
   // Returns the TypeDenoter of the Vname. Does not use the
   // given object.
 
+  @Override
 public Object visitDotVname(DotVname ast, Object o) {
     ast.type = null;
     TypeDenoter vType = (TypeDenoter) ast.V.visit(this, null);
@@ -694,6 +753,7 @@ public final class Checker implements Visitor {
     return ast.type;
   }
 
+  @Override
 public Object visitSimpleVname(SimpleVname ast, Object o) {
     ast.variable = false;
     ast.type = StdEnvironment.errorType;
@@ -718,6 +778,7 @@ public final class Checker implements Visitor {
     return ast.type;
   }
 
+  @Override
 public Object visitSubscriptVname(SubscriptVname ast, Object o) {
     TypeDenoter vType = (TypeDenoter) ast.V.visit(this, null);
     ast.variable = ast.V.variable;
@@ -737,6 +798,7 @@ public final class Checker implements Visitor {
 
   // Programs
 
+  @Override
 public Object visitProgram(Program ast, Object o) {
     ast.C.visit(this, null);
     return null;

Triangle.Compiler/src/main/java/Triangle/SyntacticAnalyzer/SourcePosition.java

@@ -28,6 +28,7 @@ public class SourcePosition {
     finish = f;
   }
 
+  @Override
 public String toString() {
     return "(" + start + ", " + finish + ")";
   }

Triangle.Compiler/src/main/java/Triangle/SyntacticAnalyzer/SyntaxError.java

@@ -18,7 +18,7 @@ class SyntaxError extends Exception {
 
   SyntaxError() {
     super();
-  };
+  }
 
   SyntaxError(String s) {
     super(s);

Triangle.Compiler/src/main/java/Triangle/SyntacticAnalyzer/Token.java

@@ -50,6 +50,7 @@ final class Token extends Object {
     return tokenTable[kind];
   }
 
+  @Override
 public String toString() {
     return "Kind=" + kind + ", spelling=" + spelling +
         ", position=" + position;

Triangle.Compiler/src/main/java/Triangle/TreeDrawer/DrawerFrame.java

@@ -39,6 +39,7 @@ class DrawerFrame extends JFrame {
 
     addWindowListener(
         new WindowAdapter() {
+          @Override
 		public void windowClosing(WindowEvent e) {
             System.exit(0);
           }

Triangle.Compiler/src/main/java/Triangle/TreeDrawer/DrawerPanel.java

@@ -27,6 +27,7 @@ class DrawerPanel extends JPanel {
     this.drawer = drawer;
   }
 
+  @Override
 public void paintComponent(Graphics g) {
     super.paintComponent(g);
     drawer.paintAST(g);

Triangle.Compiler/src/main/java/Triangle/TreeDrawer/DrawingTree.java

@@ -57,8 +57,8 @@ public class DrawingTree {
         pos.y + (height + FIXED_FONT_HEIGHT) / 2);
 
     if (children != null) {
-      for (int i = 0; i < children.length; i++) {
-        children[i].paint(graphics);
+      for (DrawingTree child : children) {
+        child.paint(graphics);
       }
     }
 
@@ -77,9 +77,9 @@ public class DrawingTree {
     Point temp = new Point(this.pos.x, this.pos.y);
 
     if (children != null) {
-      for (int i = 0; i < children.length; i++) {
-        children[i].position(temp);
-        temp.x += children[i].offset.x;
+      for (DrawingTree child : children) {
+        child.position(temp);
+        temp.x += child.offset.x;
         temp.y = this.pos.y + children[0].offset.y;
       }
     }

Triangle.Compiler/src/main/java/Triangle/TreeDrawer/LayoutVisitor.java

@@ -93,261 +93,323 @@ public class LayoutVisitor implements Visitor {
   }
 
   // Commands
+  @Override
 public Object visitAssignCommand(AssignCommand ast, Object obj) {
     return layoutBinary("AssignCom.", ast.V, ast.E);
   }
 
+  @Override
 public Object visitCallCommand(CallCommand ast, Object obj) {
     return layoutBinary("CallCom.", ast.I, ast.APS);
   }
 
+  @Override
 public Object visitEmptyCommand(EmptyCommand ast, Object obj) {
     return layoutNullary("EmptyCom.");
   }
 
+  @Override
 public Object visitIfCommand(IfCommand ast, Object obj) {
     return layoutTernary("IfCom.", ast.E, ast.C1, ast.C2);
   }
 
+  @Override
 public Object visitLetCommand(LetCommand ast, Object obj) {
     return layoutBinary("LetCom.", ast.D, ast.C);
   }
 
+  @Override
 public Object visitSequentialCommand(SequentialCommand ast, Object obj) {
     return layoutBinary("Seq.Com.", ast.C1, ast.C2);
   }
 
+  @Override
 public Object visitWhileCommand(WhileCommand ast, Object obj) {
     return layoutBinary("WhileCom.", ast.E, ast.C);
   }
 
   // Expressions
+  @Override
 public Object visitArrayExpression(ArrayExpression ast, Object obj) {
     return layoutUnary("ArrayExpr.", ast.AA);
   }
 
+  @Override
 public Object visitBinaryExpression(BinaryExpression ast, Object obj) {
     return layoutTernary("Bin.Expr.", ast.E1, ast.O, ast.E2);
   }
 
+  @Override
 public Object visitCallExpression(CallExpression ast, Object obj) {
     return layoutBinary("CallExpr.", ast.I, ast.APS);
   }
 
+  @Override
 public Object visitCharacterExpression(CharacterExpression ast, Object obj) {
     return layoutUnary("Char.Expr.", ast.CL);
   }
 
+  @Override
 public Object visitEmptyExpression(EmptyExpression ast, Object obj) {
     return layoutNullary("EmptyExpr.");
   }
 
+  @Override
 public Object visitIfExpression(IfExpression ast, Object obj) {
     return layoutTernary("IfExpr.", ast.E1, ast.E2, ast.E3);
   }
 
+  @Override
 public Object visitIntegerExpression(IntegerExpression ast, Object obj) {
     return layoutUnary("Int.Expr.", ast.IL);
   }
 
+  @Override
 public Object visitLetExpression(LetExpression ast, Object obj) {
     return layoutBinary("LetExpr.", ast.D, ast.E);
   }
 
+  @Override
 public Object visitRecordExpression(RecordExpression ast, Object obj) {
     return layoutUnary("Rec.Expr.", ast.RA);
   }
 
+  @Override
 public Object visitUnaryExpression(UnaryExpression ast, Object obj) {
     return layoutBinary("UnaryExpr.", ast.O, ast.E);
   }
 
+  @Override
 public Object visitVnameExpression(VnameExpression ast, Object obj) {
     return layoutUnary("VnameExpr.", ast.V);
   }
 
   // Declarations
+  @Override
 public Object visitBinaryOperatorDeclaration(BinaryOperatorDeclaration ast, Object obj) {
     return layoutQuaternary("Bin.Op.Decl.", ast.O, ast.ARG1, ast.ARG2, ast.RES);
   }
 
+  @Override
 public Object visitConstDeclaration(ConstDeclaration ast, Object obj) {
     return layoutBinary("ConstDecl.", ast.I, ast.E);
   }
 
+  @Override
 public Object visitFuncDeclaration(FuncDeclaration ast, Object obj) {
     return layoutQuaternary("FuncDecl.", ast.I, ast.FPS, ast.T, ast.E);
   }
 
+  @Override
 public Object visitProcDeclaration(ProcDeclaration ast, Object obj) {
     return layoutTernary("ProcDecl.", ast.I, ast.FPS, ast.C);
   }
 
+  @Override
 public Object visitSequentialDeclaration(SequentialDeclaration ast, Object obj) {
     return layoutBinary("Seq.Decl.", ast.D1, ast.D2);
   }
 
+  @Override
 public Object visitTypeDeclaration(TypeDeclaration ast, Object obj) {
     return layoutBinary("TypeDecl.", ast.I, ast.T);
   }
 
+  @Override
 public Object visitUnaryOperatorDeclaration(UnaryOperatorDeclaration ast, Object obj) {
     return layoutTernary("UnaryOp.Decl.", ast.O, ast.ARG, ast.RES);
   }
 
+  @Override
 public Object visitVarDeclaration(VarDeclaration ast, Object obj) {
     return layoutBinary("VarDecl.", ast.I, ast.T);
   }
 
   // Array Aggregates
+  @Override
 public Object visitMultipleArrayAggregate(MultipleArrayAggregate ast, Object obj) {
     return layoutBinary("Mult.ArrayAgg.", ast.E, ast.AA);
   }
 
+  @Override
 public Object visitSingleArrayAggregate(SingleArrayAggregate ast, Object obj) {
     return layoutUnary("Sing.ArrayAgg.", ast.E);
   }
 
   // Record Aggregates
+  @Override
 public Object visitMultipleRecordAggregate(MultipleRecordAggregate ast, Object obj) {
     return layoutTernary("Mult.Rec.Agg.", ast.I, ast.E, ast.RA);
   }
 
+  @Override
 public Object visitSingleRecordAggregate(SingleRecordAggregate ast, Object obj) {
     return layoutBinary("Sing.Rec.Agg.", ast.I, ast.E);
   }
 
   // Formal Parameters
+  @Override
 public Object visitConstFormalParameter(ConstFormalParameter ast, Object obj) {
     return layoutBinary("ConstF.P.", ast.I, ast.T);
   }
 
+  @Override
 public Object visitFuncFormalParameter(FuncFormalParameter ast, Object obj) {
     return layoutTernary("FuncF.P.", ast.I, ast.FPS, ast.T);
   }
 
+  @Override
 public Object visitProcFormalParameter(ProcFormalParameter ast, Object obj) {
     return layoutBinary("ProcF.P.", ast.I, ast.FPS);
   }
 
+  @Override
 public Object visitVarFormalParameter(VarFormalParameter ast, Object obj) {
     return layoutBinary("VarF.P.", ast.I, ast.T);
   }
 
+  @Override
 public Object visitEmptyFormalParameterSequence(EmptyFormalParameterSequence ast, Object obj) {
     return layoutNullary("EmptyF.P.S.");
   }
 
+  @Override
 public Object visitMultipleFormalParameterSequence(MultipleFormalParameterSequence ast, Object obj) {
     return layoutBinary("Mult.F.P.S.", ast.FP, ast.FPS);
   }
 
+  @Override
 public Object visitSingleFormalParameterSequence(SingleFormalParameterSequence ast, Object obj) {
     return layoutUnary("Sing.F.P.S.", ast.FP);
   }
 
   // Actual Parameters
+  @Override
 public Object visitConstActualParameter(ConstActualParameter ast, Object obj) {
     return layoutUnary("ConstA.P.", ast.E);
   }
 
+  @Override
 public Object visitFuncActualParameter(FuncActualParameter ast, Object obj) {
     return layoutUnary("FuncA.P.", ast.I);
   }
 
+  @Override
 public Object visitProcActualParameter(ProcActualParameter ast, Object obj) {
     return layoutUnary("ProcA.P.", ast.I);
   }
 
+  @Override
 public Object visitVarActualParameter(VarActualParameter ast, Object obj) {
     return layoutUnary("VarA.P.", ast.V);
   }
 
+  @Override
 public Object visitEmptyActualParameterSequence(EmptyActualParameterSequence ast, Object obj) {
     return layoutNullary("EmptyA.P.S.");
   }
 
+  @Override
 public Object visitMultipleActualParameterSequence(MultipleActualParameterSequence ast, Object obj) {
     return layoutBinary("Mult.A.P.S.", ast.AP, ast.APS);
   }
 
+  @Override
 public Object visitSingleActualParameterSequence(SingleActualParameterSequence ast, Object obj) {
     return layoutUnary("Sing.A.P.S.", ast.AP);
   }
 
   // Type Denoters
+  @Override
 public Object visitAnyTypeDenoter(AnyTypeDenoter ast, Object obj) {
     return layoutNullary("any");
   }
 
+  @Override
 public Object visitArrayTypeDenoter(ArrayTypeDenoter ast, Object obj) {
     return layoutBinary("ArrayTypeD.", ast.IL, ast.T);
   }
 
+  @Override
 public Object visitBoolTypeDenoter(BoolTypeDenoter ast, Object obj) {
     return layoutNullary("bool");
   }
 
+  @Override
 public Object visitCharTypeDenoter(CharTypeDenoter ast, Object obj) {
     return layoutNullary("char");
   }
 
+  @Override
 public Object visitErrorTypeDenoter(ErrorTypeDenoter ast, Object obj) {
     return layoutNullary("error");
   }
 
+  @Override
 public Object visitSimpleTypeDenoter(SimpleTypeDenoter ast, Object obj) {
     return layoutUnary("Sim.TypeD.", ast.I);
   }
 
+  @Override
 public Object visitIntTypeDenoter(IntTypeDenoter ast, Object obj) {
     return layoutNullary("int");
   }
 
+  @Override
 public Object visitRecordTypeDenoter(RecordTypeDenoter ast, Object obj) {
     return layoutUnary("Rec.TypeD.", ast.FT);
   }
 
+  @Override
 public Object visitMultipleFieldTypeDenoter(MultipleFieldTypeDenoter ast, Object obj) {
     return layoutTernary("Mult.F.TypeD.", ast.I, ast.T, ast.FT);
   }
 
+  @Override
 public Object visitSingleFieldTypeDenoter(SingleFieldTypeDenoter ast, Object obj) {
     return layoutBinary("Sing.F.TypeD.", ast.I, ast.T);
   }
 
   // Literals, Identifiers and Operators
+  @Override
 public Object visitCharacterLiteral(CharacterLiteral ast, Object obj) {
     return layoutNullary(ast.spelling);
   }
 
+  @Override
 public Object visitIdentifier(Identifier ast, Object obj) {
     return layoutNullary(ast.spelling);
   }
 
+  @Override
 public Object visitIntegerLiteral(IntegerLiteral ast, Object obj) {
     return layoutNullary(ast.spelling);
   }
 
+  @Override
 public Object visitOperator(Operator ast, Object obj) {
     return layoutNullary(ast.spelling);
   }
 
   // Value-or-variable names
+  @Override
 public Object visitDotVname(DotVname ast, Object obj) {
     return layoutBinary("DotVname", ast.I, ast.V);
   }
 
+  @Override
 public Object visitSimpleVname(SimpleVname ast, Object obj) {
     return layoutUnary("Sim.Vname", ast.I);
   }
 
+  @Override
 public Object visitSubscriptVname(SubscriptVname ast, Object obj) {
     return layoutBinary("Sub.Vname",
         ast.V, ast.E);
   }
 
   // Programs
+  @Override
 public Object visitProgram(Program ast, Object obj) {
     return layoutUnary("Program", ast.C);
   }

Triangle.Compiler/src/main/java/Triangle/TreeDrawer/Polyline.java

@@ -23,4 +23,4 @@ class Polyline {
         this.dy = dy;
         this.link = link;
     }
-};
+}