mirror of https://github.com/webpack/webpack.git
91 lines
2.5 KiB
JavaScript
91 lines
2.5 KiB
JavaScript
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/*
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MIT License http://www.opensource.org/licenses/mit-license.php
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Author Sergey Melyukov @smelukov
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*/
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"use strict";
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/** @typedef {import("estree").Node} AnyNode */
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/** @typedef {import("../Dependency")} Dependency */
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/** @typedef {import("../dependencies/HarmonyImportSpecifierDependency")} HarmonyImportSpecifierDependency */
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/** @typedef {import("../dependencies/PureExpressionDependency")} PureExpressionDependency */
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/** @typedef {import("../Parser").ParserState} ParserState */
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/** @typedef {Map<TopLevelSymbol | Dependency, Set<string | TopLevelSymbol> | true>} InnerGraph */
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/** @typedef {false|{harmonyInnerGraph: InnerGraph, harmonyAllExportDependentDependencies: Set<PureExpressionDependency|HarmonyImportSpecifierDependency>, currentTopLevelSymbol: TopLevelSymbol|void}} State */
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/** @type {WeakMap<ParserState, State>} */
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const parserStateMap = new WeakMap();
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const topLevelSymbolTag = Symbol("top level symbol");
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exports.parserStateMap = parserStateMap;
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/**
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* @param {ParserState} parserState parser state
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* @returns {void}
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*/
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exports.bailout = parserState => {
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parserStateMap.set(parserState, false);
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};
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/**
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* @param {ParserState} parserState parser state
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* @returns {void}
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*/
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exports.enable = parserState => {
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const state = parserStateMap.get(parserState);
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if (state === false) {
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return;
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}
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parserStateMap.set(parserState, {
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harmonyInnerGraph: new Map(),
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harmonyAllExportDependentDependencies: new Set(),
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currentTopLevelSymbol: undefined
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});
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};
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/**
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* @param {ParserState} parserState parser state
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* @returns {boolean} true, when enabled
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*/
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exports.isEnabled = parserState => {
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const state = parserStateMap.get(parserState);
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return !!state;
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};
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/**
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* @param {ParserState} parserState parser state
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* @returns {State} state
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*/
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exports.getState = parserState => {
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return parserStateMap.get(parserState);
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};
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class TopLevelSymbol {
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/**
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* @param {string} name name of the function
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* @param {InnerGraph} innerGraph reference to the graph
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*/
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constructor(name, innerGraph) {
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this.name = name;
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this.innerGraph = innerGraph;
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}
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/**
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* @param {string | TopLevelSymbol | true} dep export or top level symbol or always
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* @returns {void}
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*/
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addDependency(dep) {
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const info = this.innerGraph.get(this);
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if (dep === true) {
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this.innerGraph.set(this, true);
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} else if (info === undefined) {
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this.innerGraph.set(this, new Set([dep]));
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} else if (info !== true) {
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info.add(dep);
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}
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}
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}
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exports.TopLevelSymbol = TopLevelSymbol;
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exports.topLevelSymbolTag = topLevelSymbolTag;
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