sisc.nativefun
Class NativeProcedure

java.lang.Object
  sisc.util.Util
      sisc.data.Expression
          sisc.data.Value
              sisc.data.Procedure
                  sisc.nativefun.NativeProcedure

All Implemented Interfaces:

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

Direct Known Subclasses:

FixableProcedure, IndexedProcedure

public abstract class NativeProcedure
extends Procedure
implements NamedValue

A native procedure is a Scheme procedure whose behavior when applied is implemented in Java code.

See Also:

Serialized Form

Field Summary

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

NativeProcedure()

Method Summary

void	apply(Interpreter r) Called when applying this procedure to a number of arguments in the Interpreter's vlr register.
void	display(ValueWriter w)
abstract Value	doApply(Interpreter r) A NativeProcedure instance must implement this method, which performs the actual processing specific to that procedure, and returns a Value.

Methods inherited from class sisc.data.Procedure

error, throwArgSizeException, throwNestedPrimException, throwNestedPrimException, throwPrimException

Methods inherited from class sisc.data.Value

displayNamedOpaque, equals, eqv, eval, express, getValue, synopsis, synopsis, toString, valueEqual, valueHashCode, write, writeReplace

Methods inherited from class sisc.data.Expression

deserialize, deserializeAnnotations, getAnnotation, getAnnotation, getAnnotationKeys, getAnnotations, getName, readExternal, readResolve, serialize, serializeAnnotations, setAnnotation, setAnnotation, setName, visit, 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, finalize, getClass, hashCode, notify, notifyAll, wait, wait, wait

Methods inherited from interface sisc.data.NamedValue

getName, setName

Constructor Detail

NativeProcedure

public NativeProcedure()

Method Detail

doApply

public abstract Value doApply(Interpreter r)
                       throws ContinuationException

A NativeProcedure instance must implement this method, which performs the actual processing specific to that procedure, and returns a Value.

Throws:

ContinuationException

apply

public void apply(Interpreter r)
           throws ContinuationException

Description copied from class: Procedure

Called when applying this procedure to a number of arguments in the Interpreter's vlr register. The code can return a value by setting the Interpreter's acc register and/or cause additional expressions to be evaluated by setting the Interpreter's nxp register.

Specified by:

apply in class Procedure

Parameters:

r - the Interpreter

Throws:

ContinuationException

display

public void display(ValueWriter w)
             throws java.io.IOException

Specified by:

display in class Value

Throws:

java.io.IOException