com.google.javascript.jscomp

Class PeepholeCollectPropertyAssignments

java.lang.Object

com.google.javascript.jscomp.AbstractPeepholeOptimization

com.google.javascript.jscomp.PeepholeCollectPropertyAssignments

final class PeepholeCollectPropertyAssignments
extends AbstractPeepholeOptimization

A pass that looks for assignments to properties of an object or array immediately following its creation using the abbreviated syntax.

E.g. var a = [];a[0] = 0 is optimized to var a = [0] and similarly for the object constructor.

Constructor Summary

Constructors

Constructor and Description
PeepholeCollectPropertyAssignments()

Method Summary

Modifier and Type	Method and Description
private static boolean	collectArrayProperty(Node arrayLiteral, Node propertyCandidate)
private static boolean	collectObjectProperty(Node objectLiteral, Node propertyCandidate)
private boolean	collectProperty(Node propertyCandidate, java.lang.String name, Node value)
private static Node	getName(Node n)
private static Node	getValue(Node n)
(package private) static boolean	isInterestingValue(Node n)
private static boolean	isPropertyAssignmentToName(Node propertyCandidate)
private static boolean	mightContainForwardReference(Node node, java.lang.String varName)
(package private) Node	optimizeSubtree(Node subtree) Given a node to optimize and a traversal, optimize the node.

Methods inherited from class com.google.javascript.jscomp.AbstractPeepholeOptimization

areDeclaredGlobalExternsOnWindow, areNodesEqualForInlining, beginTraversal, endTraversal, getCodingConvention, isASTNormalized, isEcmaScript5OrGreater, mayEffectMutableState, mayHaveSideEffects, nodeTypeMayHaveSideEffects, report, reportCodeChange

Methods inherited from class java.lang.Object

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

Constructor Detail

PeepholeCollectPropertyAssignments

PeepholeCollectPropertyAssignments()

Method Detail

optimizeSubtree

Node optimizeSubtree(Node subtree)

Description copied from class: AbstractPeepholeOptimization

Given a node to optimize and a traversal, optimize the node. Subclasses should override to provide their own peephole optimization.

Specified by:

optimizeSubtree in class AbstractPeepholeOptimization

Parameters:

subtree - The subtree that will be optimized.

Returns:

The new version of the subtree (or null if the subtree or one of its parents was removed from the AST). If the subtree has not changed, this method must return subtree.

getName

private static Node getName(Node n)

getValue

private static Node getValue(Node n)

isInterestingValue

static boolean isInterestingValue(Node n)

isPropertyAssignmentToName

private static boolean isPropertyAssignmentToName(Node propertyCandidate)

collectProperty

private boolean collectProperty(Node propertyCandidate,
                                java.lang.String name,
                                Node value)

collectArrayProperty

private static boolean collectArrayProperty(Node arrayLiteral,
                                            Node propertyCandidate)

collectObjectProperty

private static boolean collectObjectProperty(Node objectLiteral,
                                             Node propertyCandidate)

mightContainForwardReference

private static boolean mightContainForwardReference(Node node,
                                                    java.lang.String varName)