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

java.lang.Object
  edu.vub.at.objects.natives.NATNil
      edu.vub.at.objects.natives.NATByCopy
          edu.vub.at.objects.natives.grammar.NATAbstractGrammar
              edu.vub.at.objects.natives.grammar.AGAssignField

All Implemented Interfaces:

ATAbstractGrammar, ATAssignField, ATAssignment, ATConversions, ATExpression, ATNil, ATObject, ATStatement, java.io.Serializable

public final class AGAssignField

extends NATAbstractGrammar

implements ATAssignField

Author:

tvc The native implementation of a field assignment AG element. Examples: o.x := 5 1.+ := m()

See Also:

Serialized Form

Field Summary

private ATSymbol	fieldName_
private ATExpression	rcvExp_
private ATExpression	valueExp_

Fields inherited from class edu.vub.at.objects.natives.NATNil

_INSTANCE_

Constructor Summary

AGAssignField(ATExpression rcv, ATSymbol nam, ATExpression val)

Method Summary

ATSymbol	base_getFieldName()
ATExpression	base_getReceiverExpression()
ATExpression	base_getValueExpression()
ATObject	meta_eval(ATContext ctx) To evaluate a field assignment, evaluate the receiver expression, evaluate the right hand side and ask the receiver object to assign the RHS value to the field corresponding to the given field name.
NATText	meta_print() Prints out the object in a human-readable way.
ATObject	meta_quote(ATContext ctx) AGASSFIELD(rcv,nam,val).quote(ctx) = AGASSFIELD(rcv.quote(ctx), nam.quote(ctx), val.quote(ctx))

Methods inherited from class edu.vub.at.objects.natives.grammar.NATAbstractGrammar

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_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_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_

fieldName_

private final ATSymbol fieldName_

valueExp_

private final ATExpression valueExp_

Constructor Detail

AGAssignField

public AGAssignField(ATExpression rcv,
                     ATSymbol nam,
                     ATExpression val)

Method Detail

base_getReceiverExpression

public ATExpression base_getReceiverExpression()

Specified by:

base_getReceiverExpression in interface ATAssignField

base_getFieldName

public ATSymbol base_getFieldName()

Specified by:

base_getFieldName in interface ATAssignField

base_getValueExpression

public ATExpression base_getValueExpression()

Specified by:

base_getValueExpression in interface ATAssignField

meta_eval

public ATObject meta_eval(ATContext ctx)
                   throws InterpreterException

To evaluate a field assignment, evaluate the receiver expression, evaluate the right hand side and ask the receiver object to assign the RHS value to the field corresponding to the given field name. AGASSFIELD(rcv,nam,val).eval(ctx) = rcv.eval(ctx).assignField(nam, val.eval(ctx))

Specified by:

meta_eval in interface ATObject

Overrides:

meta_eval in class NATNil

Returns:

the new value of the field

Throws:

InterpreterException

meta_quote

public ATObject meta_quote(ATContext ctx)
                    throws InterpreterException

AGASSFIELD(rcv,nam,val).quote(ctx) = AGASSFIELD(rcv.quote(ctx), nam.quote(ctx), val.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