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

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.AGDefField
All Implemented Interfaces:
ATAbstractGrammar, ATConversions, ATDefField, ATDefinition, ATExpression, ATNil, ATObject, ATStatement, java.io.Serializable

public final class AGDefField
extends NATAbstractGrammar
implements ATDefField

Author:
tvc AGDefField represents the abstract grammar for defining fields. Examples: x := 5 + := "foo"
See Also:
Serialized Form

Field Summary
private  ATSymbol name_
           
private  ATExpression valueExp_
           
 
Fields inherited from class edu.vub.at.objects.natives.NATNil
_INSTANCE_
 
Constructor Summary
AGDefField(ATSymbol name, ATExpression value)
           
 
Method Summary
 ATSymbol base_getName()
           
 ATExpression base_getValueExpression()
           
 ATObject meta_eval(ATContext ctx)
          Defines a new field in the current scope.
 NATText meta_print()
          Prints out the object in a human-readable way.
 ATObject meta_quote(ATContext ctx)
          Quoting a field definition results in a new quoted field definition.
 
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

name_

private final ATSymbol name_

valueExp_

private final ATExpression valueExp_
Constructor Detail

AGDefField

public AGDefField(ATSymbol name,
                  ATExpression value)
Method Detail

base_getName

public ATSymbol base_getName()
Specified by:
base_getName in interface ATDefField

base_getValueExpression

public ATExpression base_getValueExpression()
Specified by:
base_getValueExpression in interface ATDefField

meta_eval

public ATObject meta_eval(ATContext ctx)
                   throws InterpreterException
Defines a new field in the current scope. The return value is the evaluated value. AGDEFFIELD(nam,val).eval(ctx) = ctx.scope.addField(nam, val.eval(ctx))

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

meta_quote

public ATObject meta_quote(ATContext ctx)
                    throws InterpreterException
Quoting a field definition results in a new quoted field definition. AGDEFFIELD(nam,val).quote(ctx) = AGDEFFIELD(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