com.google.javascript.jscomp

Class ProcessEs6Modules

java.lang.Object

com.google.javascript.jscomp.NodeTraversal.AbstractPostOrderCallback

com.google.javascript.jscomp.ProcessEs6Modules

All Implemented Interfaces:

NodeTraversal.Callback

public final class ProcessEs6Modules
extends NodeTraversal.AbstractPostOrderCallback

Rewrites a ES6 module into a form that can be safely concatenated. Note that we treat a file as an ES6 module if it has at least one import or export statement.

Author:

[email protected] (Michael Zhou)

Constructor Summary

Constructors

Constructor and Description
ProcessEs6Modules(Compiler compiler, ES6ModuleLoader loader, boolean reportDependencies) Creates a new ProcessEs6Modules instance which can be used to rewrite ES6 modules to a concatenable form.

Method Summary

Modifier and Type	Method and Description
void	processFile(Node root, boolean forceRewrite) If a file contains an ES6 "import" or "export" statement, or the forceRewrite option is true, rewrite the source as a module.
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

ProcessEs6Modules

public ProcessEs6Modules(Compiler compiler,
                         ES6ModuleLoader loader,
                         boolean reportDependencies)

Creates a new ProcessEs6Modules instance which can be used to rewrite ES6 modules to a concatenable form.

Parameters:

compiler - The compiler

loader - The module loader which is used to locate ES6 modules

reportDependencies - Whether the rewriter should report dependency information to the Closure dependency manager. This needs to be true if we want to sort ES6 module inputs correctly. Note that goog.provide and goog.require calls will still be generated if this argument is false.

Method Detail

processFile

public void processFile(Node root,
                        boolean forceRewrite)

If a file contains an ES6 "import" or "export" statement, or the forceRewrite option is true, rewrite the source as a module.

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).