gnu.expr
Class SetExp

java.lang.Object
  |
  +--gnu.expr.Expression
        |
        +--gnu.expr.SetExp

public class SetExp

extends Expression

An Expression to set (bind) or define a new value to a named variable.

Field Summary

Declaration

binding If non-null, the local Declaration this refers to.

Constructor Summary

SetExp(Declaration decl, Expression val)

SetExp(java.lang.String sym, Expression val)

Method Summary

void	compile(Compilation comp, Target target)
java.lang.Object	eval(Environment env)
boolean	getHasValue() True if evaluating the SetExp yields the value of the RHS.
Type	getType() Return the Type used to represent the values of this Expression.
boolean	isDefining()
boolean	isFuncDef() True if this is a functon definition ("defun").
boolean	isSetIfUnbound()
void	print(java.io.PrintWriter ps)
void	setDefining(boolean value)
void	setFuncDef(boolean value)
void	setHasValue(boolean value)
void	setSetIfUnbound(boolean value)

Methods inherited from class gnu.expr.Expression

compile, compileNotePosition, compileWithPosition, getColumn, getFile, getLine, setFile, setLine, setLine

Methods inherited from class java.lang.Object

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

Field Detail

binding

public Declaration binding

If non-null, the local Declaration this refers to.

Constructor Detail

SetExp

public SetExp(java.lang.String sym,
              Expression val)

SetExp

public SetExp(Declaration decl,
              Expression val)

Method Detail

isDefining

public final boolean isDefining()

setDefining

public final void setDefining(boolean value)

getHasValue

public final boolean getHasValue()

True if evaluating the SetExp yields the value of the RHS.

setHasValue

public final void setHasValue(boolean value)

isFuncDef

public final boolean isFuncDef()

True if this is a functon definition ("defun").

setFuncDef

public final void setFuncDef(boolean value)

isSetIfUnbound

public final boolean isSetIfUnbound()

setSetIfUnbound

public final void setSetIfUnbound(boolean value)

eval

public java.lang.Object eval(Environment env)

Overrides:

eval in class Expression

compile

public void compile(Compilation comp,
                    Target target)

Overrides:

compile in class Expression

getType

public final Type getType()

Description copied from class: Expression

Return the Type used to represent the values of this Expression.

Overrides:

getType in class Expression

print

public void print(java.io.PrintWriter ps)

Overrides:

print in class Expression