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

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.AGAssignVariable

All Implemented Interfaces:

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

public final class AGAssignVariable

extends NATAbstractGrammar

implements ATAssignVariable

Author:

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

See Also:

Serialized Form

Field Summary

private ATExpression	valueExp_
private ATSymbol	variableName_

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

_INSTANCE_

Constructor Summary

AGAssignVariable(ATSymbol nam, ATExpression val)

Method Summary

ATAssignVariable	base_asVariableAssignment()
ATSymbol	base_getName()
ATExpression	base_getValueExpression()
boolean	base_isVariableAssignment()
ATObject	meta_eval(ATContext ctx) To evaluate a variable assignment, evaluate the right hand side and ask the current object to assign that value to the field corresponding to the left hand side.
NATText	meta_print() Prints out the object in a human-readable way.
ATObject	meta_quote(ATContext ctx) AGASSVAR(nam,val).quote(ctx) = AGASSVAR(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_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_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_isBoolean, base_isCallFrame, base_isClosure, base_isFarReference, base_isMessageCreation, base_isMethod, base_isMirror, base_isSplice, base_isStripe, base_isSymbol, base_isTable, base_isUnquoteSplice, isAmbientTalkObject, isJavaObjectUnderSymbiosis, isNativeBoolean, isNativeField, isNativeText

Field Detail

variableName_

private final ATSymbol variableName_

valueExp_

private final ATExpression valueExp_

Constructor Detail

AGAssignVariable

public AGAssignVariable(ATSymbol nam,
                        ATExpression val)

Method Detail

base_getName

public ATSymbol base_getName()

Specified by:

base_getName in interface ATAssignVariable

base_getValueExpression

public ATExpression base_getValueExpression()

Specified by:

base_getValueExpression in interface ATAssignVariable

meta_eval

public ATObject meta_eval(ATContext ctx)
                   throws InterpreterException

To evaluate a variable assignment, evaluate the right hand side and ask the current object to assign that value to the field corresponding to the left hand side. AGASSVAR(nam,val).eval(ctx) = ctx.scope.assignVariable(nam, val.eval(ctx))

Specified by:

meta_eval in interface ATObject

Overrides:

meta_eval in class NATNil

Returns:

the value assigned to the variable

Throws:

InterpreterException

meta_quote

public ATObject meta_quote(ATContext ctx)
                    throws InterpreterException

AGASSVAR(nam,val).quote(ctx) = AGASSVAR(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

base_isVariableAssignment

public boolean base_isVariableAssignment()

Specified by:

base_isVariableAssignment in interface ATConversions

Overrides:

base_isVariableAssignment in class NATNil

base_asVariableAssignment

public ATAssignVariable base_asVariableAssignment()
                                           throws XTypeMismatch

Specified by:

base_asVariableAssignment in interface ATConversions

Overrides:

base_asVariableAssignment in class NATNil

Throws:

XTypeMismatch