Alex Hochheiden
d0470670a1
`third_party/node/node_modules` is generated by `./mach vendor node`. Differential Revision: https://phabricator.services.mozilla.com/D320322
94 lines
3.0 KiB
JavaScript
94 lines
3.0 KiB
JavaScript
/*
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MIT License http://www.opensource.org/licenses/mit-license.php
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*/
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"use strict";
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const isGeneratorLowered = require("../async-modules/isGeneratorLowered");
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const makeSerializable = require("../util/makeSerializable");
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const NullDependency = require("./NullDependency");
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/** @typedef {import("webpack-sources").ReplaceSource} ReplaceSource */
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/** @typedef {import("../Dependency")} Dependency */
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/** @typedef {import("../DependencyTemplate").DependencyTemplateContext} DependencyTemplateContext */
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/** @typedef {import("../Module")} Module */
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/** @typedef {import("../javascript/JavascriptParser").Range} Range */
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/** @typedef {import("../serialization/ObjectMiddleware").ObjectDeserializerContext} ObjectDeserializerContext */
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/** @typedef {import("../serialization/ObjectMiddleware").ObjectSerializerContext} ObjectSerializerContext */
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/**
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* Marks a top-level `await` expression so it can be rewritten to `(yield …)`
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* when the module is lowered to a generator (target without `async`/`await`).
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*/
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class TopLevelAwaitDependency extends NullDependency {
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/**
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* @param {Range} range range of the whole `await` expression
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* @param {Range} argumentRange range of the awaited argument
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*/
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constructor(range, argumentRange) {
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super();
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/** @type {Range} */
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this.range = range;
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/** @type {Range} */
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this.argumentRange = argumentRange;
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}
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/**
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* Serializes this instance into the provided serializer context.
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* @param {ObjectSerializerContext} context context
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*/
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serialize(context) {
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const { write } = context;
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write(this.range);
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write(this.argumentRange);
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super.serialize(context);
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}
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/**
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* Restores this instance from the provided deserializer context.
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* @param {ObjectDeserializerContext} context context
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*/
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deserialize(context) {
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const { read } = context;
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this.range = read();
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this.argumentRange = read();
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super.deserialize(context);
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}
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}
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makeSerializable(
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TopLevelAwaitDependency,
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"webpack/lib/dependencies/TopLevelAwaitDependency"
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);
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TopLevelAwaitDependency.Template = class TopLevelAwaitDependencyTemplate extends (
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NullDependency.Template
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) {
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/**
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* Applies the plugin by registering its hooks on the compiler.
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* @param {Dependency} dependency the dependency for which the template should be applied
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* @param {ReplaceSource} source the current replace source which can be modified
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* @param {DependencyTemplateContext} templateContext the context object
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* @returns {void}
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*/
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apply(dependency, source, { module, moduleGraph, runtimeTemplate }) {
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// Only rewrite when the body is a generator (no `async`/`await`, but
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// generators). `await` and `yield` differ in precedence, so wrap the
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// whole expression: `await X` -> `(yield X)`.
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if (
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!isGeneratorLowered(
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/** @type {Module} */ (module),
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moduleGraph,
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runtimeTemplate
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)
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) {
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return;
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}
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const dep = /** @type {TopLevelAwaitDependency} */ (dependency);
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source.replace(dep.range[0], dep.argumentRange[0] - 1, "(yield ");
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source.insert(dep.argumentRange[1], ")");
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}
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};
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module.exports = TopLevelAwaitDependency;
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