sisc.exprs

Class LetrecExp

java.lang.Object

sisc.util.Util

sisc.data.Expression

sisc.exprs.AppExp

sisc.exprs.LetrecExp

All Implemented Interfaces:

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

public class LetrecExp
extends AppExp

See Also:

Serialized Form

Field Summary

Fields inherited from class sisc.exprs.AppExp

allImmediate, exp, l, nxp, POS_EXP, POS_NXP, rands

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

Constructors

Constructor and Description
LetrecExp()
LetrecExp(Expression exp, Expression[] rands, Expression nxp, int[] localIndices, int[] lexicalIndices, boolean allImmediate)

Method Summary

Methods

Modifier and Type	Method and Description
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.
void	serialize(Serializer s) All Expressions must implement a default (no-argument) constructor.

Methods inherited from class sisc.exprs.AppExp

alter, setHosts, visit

Methods inherited from class sisc.data.Expression

deserializeAnnotations, getAnnotation, getAnnotation, getAnnotationKeys, getAnnotations, getName, getValue, 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

Constructor Detail

LetrecExp

public LetrecExp(Expression exp,
         Expression[] rands,
         Expression nxp,
         int[] localIndices,
         int[] lexicalIndices,
         boolean allImmediate)

LetrecExp

public LetrecExp()

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.

Overrides:

eval in class AppExp

Parameters:

r - the Interpreter

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.*

Overrides:

express in class AppExp

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 AppExp

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 AppExp

Parameters:

s - the Deserializer

Throws:

java.io.IOException