Class ExecutionStack

java.lang.Object

java.util.AbstractCollection<PsyObject>

java.util.AbstractList<PsyObject>

java.util.ArrayList<PsyObject>

coneforest.psylla.runtime.Stack<PsyObject>

coneforest.psylla.runtime.ExecutionStack

All Implemented Interfaces:

Serializable, Cloneable, Iterable<PsyObject>, Collection<PsyObject>, List<PsyObject>, RandomAccess, SequencedCollection<PsyObject>

public class ExecutionStack
extends Stack<PsyObject>

An interpreter’s execution stack.

See Also:

• Serialized Form

Constructor Summary

Constructors

Constructor	Description
ExecutionStack()	Constructs an empty stack.

Method Summary

Modifier and Type	Method	Description
boolean	checkLoop()
boolean	checkStop()
ExecutionStack	clone()
void	enterLoop()	Enters the loop environment.
void	enterStop()	Enters the stopped environment.
void	exitLoop()	Exits the innermost loop environment.
void	exitStop()

Methods inherited from class Stack

peek, pop, push, setSize

Methods inherited from class ArrayList

add, add, addAll, addAll, addFirst, addLast, clear, contains, ensureCapacity, equals, forEach, get, getFirst, getLast, hashCode, indexOf, isEmpty, iterator, lastIndexOf, listIterator, listIterator, remove, remove, removeAll, removeFirst, removeIf, removeLast, replaceAll, retainAll, set, size, sort, spliterator, subList, toArray, toArray, trimToSize

Methods inherited from class AbstractCollection

containsAll, toString

Methods inherited from class Object

getClass, notify, notifyAll, wait, wait, wait

Methods inherited from interface Collection

parallelStream, stream, toArray

Methods inherited from interface List

containsAll, reversed

Constructor Details

ExecutionStack

public ExecutionStack()

Constructs an empty stack.

Method Details

enterLoop

public void enterLoop()

Enters the loop environment. Pushes the loop mark onto this stack.

checkLoop

public boolean checkLoop()

exitLoop

public void exitLoop()
              throws PsyInvalidExitException

Exits the innermost loop environment. Pops all the elements from this stack upto the first loop mark.

Throws:

PsyInvalidExitException - when there is not loop mark on this stack.

enterStop

public void enterStop()

Enters the stopped environment. Pushes the stop mark onto this stack.

checkStop

public boolean checkStop()

exitStop

public void exitStop()

clone

public ExecutionStack clone()

Overrides:

clone in class ArrayList<PsyObject>