edu.vub.at.objects.natives.grammar
Class AGSelection

java.lang.Object
  extended byedu.vub.at.objects.natives.NATNil
      extended byedu.vub.at.objects.natives.NATByCopy
          extended byedu.vub.at.objects.natives.grammar.NATAbstractGrammar
              extended byedu.vub.at.objects.natives.grammar.AGExpression
                  extended byedu.vub.at.objects.natives.grammar.AGSelection
All Implemented Interfaces:
ATAbstractGrammar, ATConversions, ATExpression, ATNil, ATObject, ATSelection, ATStatement, java.io.Serializable

public final class AGSelection
extends AGExpression
implements ATSelection

Author:
tvc The native implementation of a selection AG element.
See Also:
Serialized Form

Field Summary
private  ATExpression rcvExp_
           
private  ATSymbol selector_
           
 
Fields inherited from class edu.vub.at.objects.natives.NATNil
_INSTANCE_
 
Constructor Summary
AGSelection(ATExpression rcv, ATSymbol sel)
           
 
Method Summary
 ATExpression base_getReceiverExpression()
           
 ATSymbol base_getSelector()
           
 ATObject meta_eval(ATContext ctx)
          To evaluate a selection, evaluate the receiver expression to an object and select the slot with the given name from that object.
 NATText meta_print()
          Prints out the object in a human-readable way.
 ATObject meta_quote(ATContext ctx)
          Quoting a selection results in a new quoted selection.
 
Methods inherited from class edu.vub.at.objects.natives.grammar.AGExpression
base_asExpression, meta_getStripes
 
Methods inherited from class edu.vub.at.objects.natives.NATByCopy
meta_pass, meta_resolve
 
Methods inherited from class edu.vub.at.objects.natives.NATNil
asAmbientTalkObject, asJavaClassUnderSymbiosis, asJavaObjectUnderSymbiosis, asNativeBoolean, asNativeException, asNativeFarReference, asNativeFraction, asNativeNumber, asNativeNumeric, asNativeTable, asNativeText, base__opeql__opeql_, base_asActorMirror, base_asAsyncMessage, base_asBegin, base_asBoolean, base_asClosure, base_asDefinition, base_asFarReference, base_asField, base_asHandler, base_asMessage, base_asMessageCreation, base_asMethod, base_asMirror, base_asNumber, base_asSplice, base_asStatement, base_asStripe, base_asSymbol, base_asTable, base_asUnquoteSplice, base_asVariableAssignment, base_init, base_isBoolean, base_isCallFrame, base_isClosure, base_isFarReference, base_isMessageCreation, base_isMethod, base_isMirror, base_isSplice, base_isStripe, base_isSymbol, base_isTable, base_isUnquoteSplice, base_isVariableAssignment, base_new, createChild, equals, isAmbientTalkObject, isJavaObjectUnderSymbiosis, isNativeBoolean, isNativeField, isNativeText, meta_addField, meta_addMethod, meta_assignField, meta_assignVariable, meta_clone, meta_defineField, meta_doesNotUnderstand, meta_extend, meta_getDynamicParent, meta_getLexicalParent, meta_grabField, meta_grabMethod, meta_invoke, meta_isCloneOf, meta_isRelatedTo, meta_isStripedWith, meta_listFields, meta_listMethods, meta_lookup, meta_newInstance, meta_receive, meta_respondsTo, meta_select, meta_send, meta_share, readResolve, toString, writeReplace
 
Methods inherited from class java.lang.Object
clone, finalize, getClass, hashCode, notify, notifyAll, wait, wait, wait
 
Methods inherited from interface edu.vub.at.objects.ATObject
base__opeql__opeql_, base_init, base_new, meta_addField, meta_addMethod, meta_assignField, meta_assignVariable, meta_clone, meta_defineField, meta_doesNotUnderstand, meta_extend, meta_getDynamicParent, meta_getLexicalParent, meta_getStripes, meta_grabField, meta_grabMethod, meta_invoke, meta_isCloneOf, meta_isRelatedTo, meta_isStripedWith, meta_listFields, meta_listMethods, meta_lookup, meta_newInstance, meta_pass, meta_receive, meta_resolve, meta_respondsTo, meta_select, meta_send, meta_share
 
Methods inherited from interface edu.vub.at.objects.coercion.ATConversions
asAmbientTalkObject, asJavaClassUnderSymbiosis, asJavaObjectUnderSymbiosis, asNativeBoolean, asNativeException, asNativeFarReference, asNativeFraction, asNativeNumber, asNativeNumeric, asNativeTable, asNativeText, base_asActorMirror, base_asAsyncMessage, base_asBegin, base_asBoolean, base_asClosure, base_asDefinition, base_asExpression, base_asFarReference, base_asField, base_asHandler, base_asMessage, base_asMessageCreation, base_asMethod, base_asMirror, base_asNumber, base_asSplice, base_asStatement, base_asStripe, base_asSymbol, base_asTable, base_asUnquoteSplice, base_asVariableAssignment, base_isBoolean, base_isCallFrame, base_isClosure, base_isFarReference, base_isMessageCreation, base_isMethod, base_isMirror, base_isSplice, base_isStripe, base_isSymbol, base_isTable, base_isUnquoteSplice, base_isVariableAssignment, isAmbientTalkObject, isJavaObjectUnderSymbiosis, isNativeBoolean, isNativeField, isNativeText
 

Field Detail

rcvExp_

private final ATExpression rcvExp_

selector_

private final ATSymbol selector_
Constructor Detail

AGSelection

public AGSelection(ATExpression rcv,
                   ATSymbol sel)
Method Detail

base_getReceiverExpression

public ATExpression base_getReceiverExpression()
Specified by:
base_getReceiverExpression in interface ATSelection

base_getSelector

public ATSymbol base_getSelector()
Specified by:
base_getSelector in interface ATSelection

meta_eval

public ATObject meta_eval(ATContext ctx)
                   throws InterpreterException
To evaluate a selection, evaluate the receiver expression to an object and select the slot with the given name from that object. AGSEL(rcv,sel).eval(ctx) = rcv.eval(ctx).meta_select(sel)

Specified by:
meta_eval in interface ATObject
Overrides:
meta_eval in class NATNil
Returns:
the value of the selected slot.
Throws:
InterpreterException

meta_quote

public ATObject meta_quote(ATContext ctx)
                    throws InterpreterException
Quoting a selection results in a new quoted selection. AGSEL(rcv,sel).quote(ctx) = AGSEL(rcv.quote(ctx), sel.quote(ctx))

Specified by:
meta_quote in interface ATObject
Overrides:
meta_quote in class NATNil
Throws:
InterpreterException

meta_print

public NATText meta_print()
                   throws InterpreterException
Description copied from interface: ATObject
Prints out the object in a human-readable way.

Specified by:
meta_print in interface ATObject
Overrides:
meta_print in class NATNil
Throws:
InterpreterException