com.google.javascript.jscomp

Class Es6RewriteArrowFunction

java.lang.Object

com.google.javascript.jscomp.NodeTraversal.AbstractPreOrderCallback

com.google.javascript.jscomp.Es6RewriteArrowFunction

All Implemented Interfaces:

CompilerPass, HotSwapCompilerPass, NodeTraversal.Callback

public class Es6RewriteArrowFunction
extends NodeTraversal.AbstractPreOrderCallback
implements HotSwapCompilerPass

Converts ES6 arrow functions to standard anonymous ES3 functions.

Nested Class Summary

Nested Classes

Modifier and Type	Class and Description
private static class	Es6RewriteArrowFunction.UpdateThisAndArgumentsReferences

Field Summary

Fields

Modifier and Type	Field and Description
private static java.lang.String	ARGUMENTS_VAR
private AbstractCompiler	compiler
private static java.lang.String	THIS_VAR

Constructor Summary

Constructors

Constructor and Description
Es6RewriteArrowFunction(AbstractCompiler compiler)

Method Summary

Modifier and Type	Method and Description
private void	addVarDecls(NodeTraversal t, boolean addThis, boolean addArguments)
void	hotSwapScript(Node scriptRoot, Node originalRoot) Process the JS with root node root.
void	process(Node externs, Node root) Process the JS with root node root.
boolean	shouldTraverse(NodeTraversal t, Node n, Node parent) Visits a node in pre order (before visiting its children) and decides whether this node's children should be traversed.
private void	visitArrowFunction(NodeTraversal t, Node n)

Methods inherited from class com.google.javascript.jscomp.NodeTraversal.AbstractPreOrderCallback

visit

Methods inherited from class java.lang.Object

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

Field Detail

compiler

private final AbstractCompiler compiler

ARGUMENTS_VAR

private static final java.lang.String ARGUMENTS_VAR

See Also:

Constant Field Values

THIS_VAR

private static final java.lang.String THIS_VAR

See Also:

Constant Field Values

Constructor Detail

Es6RewriteArrowFunction

public Es6RewriteArrowFunction(AbstractCompiler compiler)

Method Detail

process

public void process(Node externs,
                    Node root)

Description copied from interface: CompilerPass

Process the JS with root node root. Can modify the contents of each Node tree

Specified by:

process in interface CompilerPass

Parameters:

externs - Top of external JS tree

root - Top of JS tree

hotSwapScript

public void hotSwapScript(Node scriptRoot,
                          Node originalRoot)

Description copied from interface: HotSwapCompilerPass

Process the JS with root node root. This is supposed to be significantly faster compared to corresponding full-compiler passes.

Specified by:

hotSwapScript in interface HotSwapCompilerPass

Parameters:

scriptRoot - Root node corresponding to the file that is modified, should be of type Token.SCRIPT.

originalRoot - Root node corresponding to the original version of the file that is modified. Should be of type token.SCRIPT.

shouldTraverse

public boolean shouldTraverse(NodeTraversal t,
                              Node n,
                              Node parent)

Description copied from interface: NodeTraversal.Callback

Visits a node in pre order (before visiting its children) and decides whether this node's children should be traversed. If children are traversed, they will be visited by NodeTraversal.Callback.visit(NodeTraversal, Node, Node) in postorder.

Implementations can have side effects (e.g. modifying the parse tree).

Specified by:

shouldTraverse in interface NodeTraversal.Callback

Returns:

whether the children of this node should be visited

visitArrowFunction

private void visitArrowFunction(NodeTraversal t,
                                Node n)

addVarDecls

private void addVarDecls(NodeTraversal t,
                         boolean addThis,
                         boolean addArguments)