gnu.expr
Class QuoteExp

java.lang.Object
  gnu.mapping.Procedure
      gnu.mapping.Procedure0
          gnu.expr.Expression
              gnu.expr.QuoteExp

All Implemented Interfaces:

Named, Printable

public class QuoteExp
extends Expression

An Expression that evaluates to a constant value.

Field Summary

static QuoteExp	falseExp
static QuoteExp	nullExp
static QuoteExp	trueExp
static QuoteExp	undefined_exp
static QuoteExp	voidExp

Fields inherited from class gnu.expr.Expression

flags, NEXT_AVAIL_FLAG, noExpressions

Constructor Summary

QuoteExp(java.lang.Object val)

Method Summary

void	compile(Compilation comp, Target target)
java.lang.Object	eval(Environment env)
static QuoteExp	getInstance(java.lang.Object value)
Type	getType() Return the Type used to represent the values of this Expression.
java.lang.Object	getValue()
void	print(OutPort out)
java.lang.String	toString()
protected Expression	walk(ExpWalker walker)

Methods inherited from class gnu.expr.Expression

apply, apply0, compile, compileButFirst, compileNotePosition, compileWithPosition, compileWithPosition, eval, getColumn, getFile, getFlag, getFlags, getLine, makeWhile, match0, print, printLineColumn, setFile, setFlag, setFlag, setLine, setLine, setLine, setLine, walkChildren

Methods inherited from class gnu.mapping.Procedure0

apply1, apply2, apply3, apply4, applyN, numArgs

Methods inherited from class gnu.mapping.Procedure

apply, check0, check1, check2, check3, check4, checkArgCount, checkN, getName, getProperty, getSetter, getSymbol, match1, match2, match3, match4, matchN, maxArgs, minArgs, name, removeProperty, set0, set1, setN, setName, setProperty, setProperty, setSetter, setSymbol

Methods inherited from class java.lang.Object

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

Field Detail

undefined_exp

public static QuoteExp undefined_exp

voidExp

public static QuoteExp voidExp

trueExp

public static QuoteExp trueExp

falseExp

public static QuoteExp falseExp

nullExp

public static QuoteExp nullExp

Constructor Detail

QuoteExp

public QuoteExp(java.lang.Object val)

Method Detail

getValue

public final java.lang.Object getValue()

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

getInstance

public static QuoteExp getInstance(java.lang.Object value)

eval

public java.lang.Object eval(Environment env)

Overrides:

eval in class Expression

compile

public void compile(Compilation comp,
                    Target target)

Specified by:

compile in class Expression

walk

protected Expression walk(ExpWalker walker)

Overrides:

walk in class Expression

toString

public java.lang.String toString()

Overrides:

toString in class Procedure

print

public void print(OutPort out)

Specified by:

print in class Expression