sisc.exprs
Class LambdaExp

java.lang.Object
  sisc.util.Util
      sisc.data.Expression
          sisc.exprs.LambdaExp

All Implemented Interfaces:

java.io.Externalizable, java.io.Serializable, Immediate, ExpressionVisitee, Version

public class LambdaExp
extends Expression
implements Immediate

See Also:

Serialized Form

Field Summary

Expression	body
int[]	boxes
int	fcount
boolean	infiniteArity
int	lcount
int[]	lexicalIndices
int[]	localIndices

Fields inherited from class sisc.data.Expression

annotations, EMPTYSET

Fields inherited from class sisc.util.Util

BACKQUOTE, BEGIN, bundles, caseSensitive, EMPTYLIST, EMPTYVEC, EOF, ERRORK, EVAL, EXPSC, EXPTOP, FALSE, FCONT, FIVE, JEXCEPTION, LAMBDA, LOCATION, maxFloatPrecision, MESSAGE, minFloatPrecision, NAME, OTHER, PARENT, permitInterrupts, QUOTE, QUOTESYM, REPORT, SETBANG, SISC, SISC_SPECIFIC, SISCB, SOURCE_COLUMN, SOURCE_FILE, SOURCE_LINE, SYMENV, THIS, TOPLEVEL, TRUE, UNQUOTE, UNQUOTE_SPLICING, VOID, ZV

Fields inherited from interface sisc.util.Version

VERSION

Constructor Summary

LambdaExp()

LambdaExp(int s, Expression body, boolean arity, int[] localids, int[] lexids, int[] boxes)

Method Summary

void	deserialize(Deserializer s) All Expressions must implement a default (no-argument) constructor.
void	eval(Interpreter r) All expressions can be evaluated to some Scheme value.
Value	express() A debugging function, express returns a Scheme value that describes this expression.
Value	getValue(Interpreter r) If an expression implements the Immediate interface, it must override getValue, which returns as a Value, the immediate value of this expression.
void	serialize(Serializer s) All Expressions must implement a default (no-argument) constructor.
boolean	visit(ExpressionVisitor v)

Methods inherited from class sisc.data.Expression

deserializeAnnotations, getAnnotation, getAnnotation, getAnnotationKeys, getAnnotations, getName, readExternal, readResolve, serializeAnnotations, setAnnotation, setAnnotation, setName, visitAnnotations, writeExternal

Methods inherited from class sisc.util.Util

annotated, annotatedAppEval, append, argCheck, argsToSymbols, assq, bininport, bininstream, binoutport, binoutstream, box, character, charinport, charinreader, charoutport, charoutwriter, charsetFromString, chr, cont, currentClassLoader, env, error, error, error, error, error, error, error, expr, getDefaultCharacterSet, immutablePair, immutableVector, inport, javaExceptionToString, javaWrap, justify, length, liMessage, liMessage, liMessage, liMessage, liMessage, liMessage, liMessage, list, list, list, list, list, makeURL, mapcar, memq, nlib, num, outport, pair, pairToExpressions, pairToExpVect, pairToValues, proc, read, registerBundle, reverse, reverseInPlace, simpleErrorToString, sourceAnnotations, str, string, sym, symbol, symval, truePair, truth, truth, typeError, typeError, updateName, url, url, url, valArrayToList, valArrayToList, valArrayToVec, vec, warn, warn, warn

Methods inherited from class java.lang.Object

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

Field Detail

infiniteArity

public boolean infiniteArity

fcount

public int fcount

lcount

public int lcount

localIndices

public int[] localIndices

lexicalIndices

public int[] lexicalIndices

boxes

public int[] boxes

body

public Expression body

Constructor Detail

LambdaExp

public LambdaExp(int s,
                 Expression body,
                 boolean arity,
                 int[] localids,
                 int[] lexids,
                 int[] boxes)

LambdaExp

public LambdaExp()

Method Detail

eval

public void eval(Interpreter r)
          throws ContinuationException

Description copied from class: Expression

All expressions can be evaluated to some Scheme value. This function implements the exact manner in which an expression is evaluated. An expression, when evaluated, performs some action that results in its value being placed in the acc register of the given Interpreter. An expression that immediately evaluates to a value (i.e. does not require that an additional expression be evaluated to obtain its value) must clear the nxp register by setting it to null. Otherwise, nxp should be set to the expression that is to be evaluated next before this method returns.

Specified by:

eval in class Expression

Parameters:

r - the Interpreter

Throws:

ContinuationException

getValue

public Value getValue(Interpreter r)
               throws ContinuationException

Description copied from class: Expression

If an expression implements the Immediate interface, it must override getValue, which returns as a Value, the immediate value of this expression.

Specified by:

getValue in interface Immediate

Overrides:

getValue in class Expression

Parameters:

r - the Interpreter

Returns:

the immediate value of this expression, or null if the value cannot be obtained immediately.

Throws:

ContinuationException

express

public Value express()

Description copied from class: Expression

A debugging function, express returns a Scheme value that describes this expression. See examples in sisc.exprs.*

Specified by:

express in class Expression

serialize

public void serialize(Serializer s)
               throws java.io.IOException

Description copied from class: Expression

All Expressions must implement a default (no-argument) constructor. Those that wish to be serialized to a heap must implement both this and the deserialize method. The Expression may use any method of the Serializer, which implements java.io.DataOutput to write its state.

Overrides:

serialize in class Expression

Parameters:

s - the Serializer

Throws:

java.io.IOException

deserialize

public void deserialize(Deserializer s)
                 throws java.io.IOException

Description copied from class: Expression

All Expressions must implement a default (no-argument) constructor. Those that wish to b serialized to a heap must implement both this and the serialize method. The Expression may use any method of the DataInput stream and the Deserializer serialization context to read its state.

Overrides:

deserialize in class Expression

Parameters:

s - the Deserializer

Throws:

java.io.IOException

visit

public boolean visit(ExpressionVisitor v)

Specified by:

visit in interface ExpressionVisitee

Overrides:

visit in class Expression