com.google.javascript.jscomp

Class Es6InjectRuntimeLibraries

java.lang.Object

com.google.javascript.jscomp.NodeTraversal.AbstractPostOrderCallback

com.google.javascript.jscomp.Es6InjectRuntimeLibraries

All Implemented Interfaces:

CompilerPass, HotSwapCompilerPass, NodeTraversal.Callback

public final class Es6InjectRuntimeLibraries
extends NodeTraversal.AbstractPostOrderCallback
implements HotSwapCompilerPass

Injects JS library code that may be needed by the transpiled form of the input source code.

The intention here is to add anything that could be needed and rely on `RemoveUnusedCode` to remove the parts that don't end up getting used. This pass should run before type checking so the type checking code can add type information to the injected JavaScript for checking and optimization purposes.

This class also reports an error if it finds getters or setters are used and the language output level is too low to support them. TODO(bradfordcsmith): The getter/setter check should probably be done separately in an earlier pass that only runs when the output language level is ES3 and the input language level is ES5 or greater.

Constructor Summary

Constructors

Constructor and Description
Es6InjectRuntimeLibraries(AbstractCompiler compiler)

Method Summary

Modifier and Type	Method and Description
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.
void	visit(NodeTraversal t, Node n, Node parent) Visits a node in postorder (after its children have been visited).

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

shouldTraverse

Methods inherited from class java.lang.Object

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

Constructor Detail

Es6InjectRuntimeLibraries

public Es6InjectRuntimeLibraries(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.

visit

public void visit(NodeTraversal t,
                  Node n,
                  Node parent)

Description copied from interface: NodeTraversal.Callback

Visits a node in postorder (after its children have been visited). A node is visited only if all its parents should be traversed (NodeTraversal.Callback.shouldTraverse(NodeTraversal, Node, Node)).

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

Specified by:

visit in interface NodeTraversal.Callback