coins.ast.expr
Class ConstantExpr

java.lang.Object
  coins.ast.ASTree
      coins.ast.expr.ConstantExpr

All Implemented Interfaces:

Expr, java.io.Serializable, TypeId

Direct Known Subclasses:

FloatConstantExpr, IntConstantExpr

public abstract class ConstantExpr

extends ASTree

implements Expr, TypeId

Constant class. This class has been rewritten because the original ConstantExpr class does not hold type information when constant folding is done. Objects of ConstantExpr can not be changed as it is for String object. If you are tempted to change the value of constant object, you should construct new object instead of changing the value.

See Also:

Serialized Form

Field Summary

protected byte[]

fType

Fields inherited from interface coins.ast.TypeId

ARRAY_T, CHAR_T, CONST_T, DOUBLE_T, ELLIPSIS_T, ENUM_BEGIN, ENUM_END, FLOAT_T, FUNCTION_T, INT_T, LONG_DOUBLE_T, LONG_LONG_T, LONG_T, NO_DIMENSION_T, OFFSET_T, POINTER_T, RESTRICT_T, RETURN_T, S_AUTO, S_EXTERN, S_INLINE, S_NONE, S_REGISTER, S_STATIC, SHORT_T, SIGNED_T, SIZE_T, STRUCT_BEGIN, STRUCT_END, UNION_BEGIN, UNION_END, UNSIGNED_T, VOID_T, VOLATILE_T

Constructor Summary

ConstantExpr()

Method Summary

void	accept(Visitor v) Is a method for the visitor pattern.
abstract double	doubleValue()
ASTree	getLeft()
ASTree	getRight()
abstract char	getSignChar()
byte[]	getType() Returns the type of the resulting value of evaluating the expression.
abstract char	getTypeChar()
abstract long	longValue()
void	setLeft(ASTree left)
void	setRight(ASTree right)

Methods inherited from class coins.ast.ASTree

getTag, putSeparator, rightToString, toString, toString1

Methods inherited from class java.lang.Object

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

Field Detail

fType

protected byte[] fType

Constructor Detail

ConstantExpr

public ConstantExpr()

Method Detail

longValue

public abstract long longValue()

doubleValue

public abstract double doubleValue()

getSignChar

public abstract char getSignChar()

getTypeChar

public abstract char getTypeChar()

getLeft

public ASTree getLeft()

Specified by:

getLeft in class ASTree

getRight

public ASTree getRight()

Specified by:

getRight in class ASTree

setLeft

public void setLeft(ASTree left)

Specified by:

setLeft in class ASTree

setRight

public void setRight(ASTree right)

Specified by:

setRight in class ASTree

accept

public void accept(Visitor v)

Description copied from class: ASTree

Is a method for the visitor pattern. It calls atXXX() on the given visitor, where XXX is the class name of the node object.

Specified by:

accept in class ASTree

getType

public byte[] getType()

Description copied from interface: Expr

Returns the type of the resulting value of evaluating the expression. See ast.TypeId

Specified by:

getType in interface Expr

Returns:

the encoded type.