avrora.syntax
Class SyntacticOperand.Expr

java.lang.Object
  avrora.syntax.ASTNode
      avrora.syntax.SyntacticOperand
          avrora.syntax.SyntacticOperand.Expr

All Implemented Interfaces:

Operand, Operand.Constant

Enclosing class:

SyntacticOperand

public static class SyntacticOperand.Expr

extends SyntacticOperand

implements Operand.Constant

The SyntacticOperand.Expr class represents a constant expression that was specified in the source assembly as an expression. This expression might be compound and need to be evaluated before its actual value is known.

Nested Class Summary

Nested classes inherited from class avrora.syntax.SyntacticOperand

SyntacticOperand.Expr, SyntacticOperand.Register

Nested classes inherited from class avrora.core.Operand

Operand.Constant, Operand.Register

Field Summary

Expr

expr

Fields inherited from class avrora.syntax.SyntacticOperand

left, right

Constructor Summary

SyntacticOperand.Expr(Expr e, boolean b)

Method Summary

Operand.Constant	asConstant() The asConstant() method uses virtual dispatch to avoid a cast.
int	getValue() The getvalue() method returns the integer value of this constant operand.
int	getValueAsWord() The getValueAsWord() method returns the value of this constant operand as word-aligned; meaning, for addresses, it will divide by 2, but for immediate constants it will not.
void	simplify(int nextByteAddress, Context c)
java.lang.String	toString()

Methods inherited from class avrora.syntax.SyntacticOperand

asRegister, getLeftMostToken, getRightMostToken

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, wait, wait, wait

Methods inherited from interface avrora.core.Operand

asRegister

Field Detail

expr

public final Expr expr

Constructor Detail

SyntacticOperand.Expr

public SyntacticOperand.Expr(Expr e,
                             boolean b)

Method Detail

asConstant

public Operand.Constant asConstant()

Description copied from interface: Operand

The asConstant() method uses virtual dispatch to avoid a cast. If this operand is an instance of Operand.Constant it will return itself. Otherwise, it will return null.

Specified by:

asConstant in interface Operand

Overrides:

asConstant in class SyntacticOperand

getValue

public int getValue()

Description copied from interface: Operand.Constant

The getvalue() method returns the integer value of this constant operand.

Specified by:

getValue in interface Operand.Constant

Returns:

an integer representation of the value

getValueAsWord

public int getValueAsWord()

Description copied from interface: Operand.Constant

The getValueAsWord() method returns the value of this constant operand as word-aligned; meaning, for addresses, it will divide by 2, but for immediate constants it will not.

Specified by:

getValueAsWord in interface Operand.Constant

Returns:

an integer representation of the value, word-aligned if it is an address

simplify

public void simplify(int nextByteAddress,
                     Context c)

Specified by:

simplify in class SyntacticOperand

toString

public java.lang.String toString()