aspoev.interpreter.base
Class BlockElement

java.lang.Object
  aspoev.interpreter.base.Element
      aspoev.interpreter.base.StatementElement
          aspoev.interpreter.base.BlockElement

All Implemented Interfaces:

java.lang.Cloneable, aspoev.Executable, pJ.jasmine.PRI, java.io.Serializable

public class BlockElement

extends StatementElement

implements pJ.jasmine.PRI

This Element is the AST equivalent of a c-style block, delineated by '{' and '}'. Although you might think that a MethodInvokationElement would contain its body, the StatementElements to be executed by the method are actually delegated to this class. It calls upon the current ExecutionEnvironment to push scope before it executes, and pop scope after it executes. This effectively gives variables a limited lifetime. Variables can be returned from a BlockElement by means of a ReturnElement, created with the keyword 'return' in vejal.

See Also:

Serialized Form

Field Summary

protected aspoev.interpreter.base.ExecutionIterator	execution
protected pJ.jasmine.ListOfObject	statements

Fields inherited from class aspoev.interpreter.base.Element

parent

Fields inherited from interface pJ.jasmine.PRI

DELETECHANGE, MODIFYCHANGE, NOCHANGE

Constructor Summary

BlockElement()

Method Summary

void	addStatement(StatementElement statement) Called by generated parser aspoev.interpreter.parser.VejalParser
java.lang.Object	clone()
protected java.lang.Object	executeElement()
java.util.Collection	getChildrenByType(java.lang.Class childClass)
java.lang.String	getCodeString()
boolean	stepBackExecution()
java.lang.String	toString()

Methods inherited from class aspoev.interpreter.base.Element

execute, getRValue, persist

Methods inherited from class java.lang.Object

equals, finalize, getClass, hashCode, notify, notifyAll, wait, wait, wait

Field Detail

statements

protected pJ.jasmine.ListOfObject statements

execution

protected transient aspoev.interpreter.base.ExecutionIterator execution

Constructor Detail

BlockElement

public BlockElement()

Method Detail

addStatement

public void addStatement(StatementElement statement)

Called by generated parser aspoev.interpreter.parser.VejalParser

clone

public java.lang.Object clone()

Specified by:

clone in class Element

executeElement

protected java.lang.Object executeElement()

Overrides:

executeElement in class StatementElement

getChildrenByType

public java.util.Collection getChildrenByType(java.lang.Class childClass)

Specified by:

getChildrenByType in class Element

stepBackExecution

public boolean stepBackExecution()

getCodeString

public java.lang.String getCodeString()

Specified by:

getCodeString in class Element

toString

public java.lang.String toString()

Overrides:

toString in class Element