com.oracle.truffle.sl.nodes.expression

Class SLShortCircuitNode

java.lang.Object

com.oracle.truffle.api.nodes.Node

com.oracle.truffle.sl.nodes.local.SLScopedNode

com.oracle.truffle.sl.nodes.SLStatementNode

com.oracle.truffle.sl.nodes.SLExpressionNode

com.oracle.truffle.sl.nodes.expression.SLShortCircuitNode

All Implemented Interfaces:

com.oracle.truffle.api.instrumentation.InstrumentableNode, com.oracle.truffle.api.nodes.NodeInterface, Cloneable

Direct Known Subclasses:

SLLogicalAndNode, SLLogicalOrNode

public abstract class SLShortCircuitNode
extends SLExpressionNode

Logical operations in SL use short circuit evaluation: if the evaluation of the left operand already decides the result of the operation, the right operand must not be executed. This is expressed in using this base class for SLLogicalAndNode and SLLogicalOrNode.

Nested Class Summary

Nested classes/interfaces inherited from class com.oracle.truffle.api.nodes.Node

com.oracle.truffle.api.nodes.Node.Child, com.oracle.truffle.api.nodes.Node.Children

Nested classes/interfaces inherited from interface com.oracle.truffle.api.instrumentation.InstrumentableNode

com.oracle.truffle.api.instrumentation.InstrumentableNode.WrapperNode

Constructor Summary

Constructors

Constructor and Description
SLShortCircuitNode(SLExpressionNode left, SLExpressionNode right)

Method Summary

Modifier and Type	Method and Description
protected abstract boolean	execute(boolean leftValue, boolean rightValue) Calculates the result of the short circuit operation.
boolean	executeBoolean(com.oracle.truffle.api.frame.VirtualFrame frame)
Object	executeGeneric(com.oracle.truffle.api.frame.VirtualFrame frame) The execute method when no specialization is possible.
protected abstract boolean	isEvaluateRight(boolean leftValue) This method is called after the left child was evaluated, but before the right child is evaluated.

Methods inherited from class com.oracle.truffle.sl.nodes.SLExpressionNode

addExpressionTag, createWrapper, executeLong, executeVoid, hasTag

Methods inherited from class com.oracle.truffle.sl.nodes.SLStatementNode

addRootTag, addStatementTag, formatSourceSection, getSourceCharIndex, getSourceEndIndex, getSourceLength, getSourceSection, hasSource, isInstrumentable, setSourceSection, setUnavailableSourceSection, toString

Methods inherited from class com.oracle.truffle.sl.nodes.local.SLScopedNode

findBlock, getVisibleVariablesIndexOnEnter, hasScope, setVisibleVariablesIndexOnEnter, setVisibleVariablesIndexOnExit

Methods inherited from class com.oracle.truffle.api.nodes.Node

accept, adoptChildren, atomic, atomic, copy, deepCopy, getChildren, getCost, getDebugProperties, getDescription, getEncapsulatingSourceSection, getLock, getParent, getRootNode, insert, insert, isAdoptable, isSafelyReplaceableBy, notifyInserted, onReplace, replace, replace, reportPolymorphicSpecialize

Methods inherited from class java.lang.Object

clone, equals, getClass, hashCode, notify, notifyAll, wait, wait, wait

Methods inherited from interface com.oracle.truffle.api.instrumentation.InstrumentableNode

findInstrumentableParent, findNearestNodeAt, getNodeObject, materializeInstrumentableNodes

Constructor Detail

SLShortCircuitNode

public SLShortCircuitNode(SLExpressionNode left,
                          SLExpressionNode right)

Method Detail

executeGeneric

public final Object executeGeneric(com.oracle.truffle.api.frame.VirtualFrame frame)

Description copied from class: SLExpressionNode

The execute method when no specialization is possible. This is the most general case, therefore it must be provided by all subclasses.

Specified by:

executeGeneric in class SLExpressionNode

executeBoolean

public final boolean executeBoolean(com.oracle.truffle.api.frame.VirtualFrame frame)

Overrides:

executeBoolean in class SLExpressionNode

isEvaluateRight

protected abstract boolean isEvaluateRight(boolean leftValue)

This method is called after the left child was evaluated, but before the right child is evaluated. The right child is only evaluated when the return value is {code true}.

execute

protected abstract boolean execute(boolean leftValue,
                                   boolean rightValue)

Calculates the result of the short circuit operation. If the right node is not evaluated then false is provided.