mirror of https://github.com/webpack/webpack.git
3242 lines
95 KiB
JavaScript
3242 lines
95 KiB
JavaScript
/*
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MIT License http://www.opensource.org/licenses/mit-license.php
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Author Tobias Koppers @sokra
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*/
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"use strict";
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const { Parser: AcornParser } = require("acorn");
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const { SyncBailHook, HookMap } = require("tapable");
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const vm = require("vm");
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const Parser = require("../Parser");
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const StackedMap = require("../util/StackedMap");
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const memorize = require("../util/memorize");
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const BasicEvaluatedExpression = require("./BasicEvaluatedExpression");
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/** @typedef {import("acorn").Options} AcornOptions */
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/** @typedef {import("estree").ArrayExpression} ArrayExpressionNode */
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/** @typedef {import("estree").BinaryExpression} BinaryExpressionNode */
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/** @typedef {import("estree").BlockStatement} BlockStatementNode */
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/** @typedef {import("estree").CallExpression} CallExpressionNode */
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/** @typedef {import("estree").ClassDeclaration} ClassDeclarationNode */
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/** @typedef {import("estree").ClassExpression} ClassExpressionNode */
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/** @typedef {import("estree").Comment} CommentNode */
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/** @typedef {import("estree").ConditionalExpression} ConditionalExpressionNode */
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/** @typedef {import("estree").Declaration} DeclarationNode */
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/** @typedef {import("estree").Expression} ExpressionNode */
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/** @typedef {import("estree").Identifier} IdentifierNode */
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/** @typedef {import("estree").IfStatement} IfStatementNode */
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/** @typedef {import("estree").LabeledStatement} LabeledStatementNode */
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/** @typedef {import("estree").Literal} LiteralNode */
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/** @typedef {import("estree").LogicalExpression} LogicalExpressionNode */
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/** @typedef {import("estree").MemberExpression} MemberExpressionNode */
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/** @typedef {import("estree").MetaProperty} MetaPropertyNode */
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/** @typedef {import("estree").MethodDefinition} MethodDefinitionNode */
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/** @typedef {import("estree").ModuleDeclaration} ModuleDeclarationNode */
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/** @typedef {import("estree").Node} AnyNode */
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/** @typedef {import("estree").Program} ProgramNode */
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/** @typedef {import("estree").Statement} StatementNode */
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/** @typedef {import("estree").Super} SuperNode */
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/** @typedef {import("estree").TaggedTemplateExpression} TaggedTemplateExpressionNode */
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/** @typedef {import("estree").TemplateLiteral} TemplateLiteralNode */
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/** @typedef {import("estree").ThisExpression} ThisExpressionNode */
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/** @typedef {import("estree").UnaryExpression} UnaryExpressionNode */
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/** @typedef {import("estree").VariableDeclarator} VariableDeclaratorNode */
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/** @template T @typedef {import("tapable").AsArray<T>} AsArray<T> */
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/** @typedef {import("../Parser").ParserState} ParserState */
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/** @typedef {import("../Parser").PreparsedAst} PreparsedAst */
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const EMPTY_ARRAY = [];
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// Syntax: https://developer.mozilla.org/en/SpiderMonkey/Parser_API
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const parser = AcornParser.extend(require("../parsing/importAwaitAcornPlugin"));
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class VariableInfo {
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/**
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* @param {ScopeInfo} declaredScope scope in which the variable is declared
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* @param {string | true} freeName which free name the variable aliases, or true when none
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* @param {TagInfo | undefined} tagInfo info about tags
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*/
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constructor(declaredScope, freeName, tagInfo) {
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this.declaredScope = declaredScope;
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this.freeName = freeName;
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this.tagInfo = tagInfo;
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}
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}
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/** @typedef {string | ScopeInfo | VariableInfo} ExportedVariableInfo */
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/** @typedef {LiteralNode | string | null | undefined} ImportSource */
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/** @typedef {Omit<AcornOptions, "sourceType"> & { sourceType: "module" | "script" | "auto" }} ParseOptions */
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/**
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* @typedef {Object} TagInfo
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* @property {any} tag
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* @property {any} data
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* @property {TagInfo | undefined} next
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*/
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/**
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* @typedef {Object} ScopeInfo
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* @property {StackedMap<string, VariableInfo | ScopeInfo>} definitions
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* @property {boolean | "arrow"} topLevelScope
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* @property {boolean} inShorthand
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* @property {boolean} isStrict
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* @property {boolean} isAsmJs
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* @property {boolean} inTry
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*/
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const joinRanges = (startRange, endRange) => {
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if (!endRange) return startRange;
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if (!startRange) return endRange;
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return [startRange[0], endRange[1]];
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};
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const objectAndMembersToName = (object, membersReversed) => {
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let name = object;
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for (let i = membersReversed.length - 1; i >= 0; i--) {
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name = name + "." + membersReversed[i];
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}
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return name;
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};
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const getRootName = expression => {
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switch (expression.type) {
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case "Identifier":
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return expression.name;
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case "ThisExpression":
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return "this";
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case "MetaProperty":
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return "import.meta";
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default:
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return undefined;
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}
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};
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/** @type {AcornOptions} */
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const defaultParserOptions = {
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ranges: true,
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locations: true,
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ecmaVersion: 11,
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sourceType: "module",
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allowAwaitOutsideFunction: true,
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onComment: null
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};
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// regexp to match at least one "magic comment"
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const webpackCommentRegExp = new RegExp(/(^|\W)webpack[A-Z]{1,}[A-Za-z]{1,}:/);
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const EMPTY_COMMENT_OPTIONS = {
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options: null,
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errors: null
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};
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class JavascriptParser extends Parser {
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/**
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* @param {TODO} options options
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* @param {"module" | "script" | "auto"} sourceType default source type
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*/
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constructor(options, sourceType = "auto") {
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super();
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this.hooks = Object.freeze({
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/** @type {HookMap<SyncBailHook<[UnaryExpressionNode], BasicEvaluatedExpression | undefined | null>>} */
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evaluateTypeof: new HookMap(() => new SyncBailHook(["expression"])),
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/** @type {HookMap<SyncBailHook<[ExpressionNode], BasicEvaluatedExpression | undefined | null>>} */
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evaluate: new HookMap(() => new SyncBailHook(["expression"])),
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/** @type {HookMap<SyncBailHook<[IdentifierNode | ThisExpressionNode | MemberExpressionNode], BasicEvaluatedExpression | undefined | null>>} */
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evaluateIdentifier: new HookMap(() => new SyncBailHook(["expression"])),
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/** @type {HookMap<SyncBailHook<[IdentifierNode | ThisExpressionNode | MemberExpressionNode], BasicEvaluatedExpression | undefined | null>>} */
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evaluateDefinedIdentifier: new HookMap(
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() => new SyncBailHook(["expression"])
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),
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/** @type {HookMap<SyncBailHook<[CallExpressionNode, BasicEvaluatedExpression | undefined], BasicEvaluatedExpression | undefined | null>>} */
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evaluateCallExpressionMember: new HookMap(
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() => new SyncBailHook(["expression", "param"])
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),
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/** @type {SyncBailHook<[StatementNode | ModuleDeclarationNode], boolean | void>} */
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preStatement: new SyncBailHook(["statement"]),
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/** @type {SyncBailHook<[StatementNode | ModuleDeclarationNode], boolean | void>} */
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blockPreStatement: new SyncBailHook(["declaration"]),
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/** @type {SyncBailHook<[StatementNode | ModuleDeclarationNode], boolean | void>} */
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statement: new SyncBailHook(["statement"]),
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/** @type {SyncBailHook<[IfStatementNode], boolean | void>} */
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statementIf: new SyncBailHook(["statement"]),
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/** @type {SyncBailHook<[ExpressionNode, ClassExpressionNode | ClassDeclarationNode], boolean | void>} */
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classExtendsExpression: new SyncBailHook(["expression", "statement"]),
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/** @type {SyncBailHook<[MethodDefinitionNode, ClassExpressionNode | ClassDeclarationNode], boolean | void>} */
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classBodyElement: new SyncBailHook(["element", "statement"]),
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/** @type {HookMap<SyncBailHook<[LabeledStatementNode], boolean | void>>} */
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label: new HookMap(() => new SyncBailHook(["statement"])),
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/** @type {SyncBailHook<[StatementNode, ImportSource], boolean | void>} */
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import: new SyncBailHook(["statement", "source"]),
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/** @type {SyncBailHook<[StatementNode, ImportSource, string, string], boolean | void>} */
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importSpecifier: new SyncBailHook([
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"statement",
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"source",
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"exportName",
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"identifierName"
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]),
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/** @type {SyncBailHook<[StatementNode], boolean | void>} */
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export: new SyncBailHook(["statement"]),
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/** @type {SyncBailHook<[StatementNode, ImportSource], boolean | void>} */
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exportImport: new SyncBailHook(["statement", "source"]),
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/** @type {SyncBailHook<[StatementNode, DeclarationNode], boolean | void>} */
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exportDeclaration: new SyncBailHook(["statement", "declaration"]),
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/** @type {SyncBailHook<[StatementNode, DeclarationNode], boolean | void>} */
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exportExpression: new SyncBailHook(["statement", "declaration"]),
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/** @type {SyncBailHook<[StatementNode, string, string, number | undefined], boolean | void>} */
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exportSpecifier: new SyncBailHook([
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"statement",
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"identifierName",
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"exportName",
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"index"
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]),
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/** @type {SyncBailHook<[StatementNode, ImportSource, string, string, number | undefined], boolean | void>} */
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exportImportSpecifier: new SyncBailHook([
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"statement",
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"source",
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"identifierName",
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"exportName",
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"index"
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]),
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/** @type {SyncBailHook<[VariableDeclaratorNode, StatementNode], boolean | void>} */
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preDeclarator: new SyncBailHook(["declarator", "statement"]),
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/** @type {SyncBailHook<[VariableDeclaratorNode, StatementNode], boolean | void>} */
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declarator: new SyncBailHook(["declarator", "statement"]),
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/** @type {HookMap<SyncBailHook<[DeclarationNode], boolean | void>>} */
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varDeclaration: new HookMap(() => new SyncBailHook(["declaration"])),
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/** @type {HookMap<SyncBailHook<[DeclarationNode], boolean | void>>} */
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varDeclarationLet: new HookMap(() => new SyncBailHook(["declaration"])),
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/** @type {HookMap<SyncBailHook<[DeclarationNode], boolean | void>>} */
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varDeclarationConst: new HookMap(() => new SyncBailHook(["declaration"])),
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/** @type {HookMap<SyncBailHook<[DeclarationNode], boolean | void>>} */
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varDeclarationVar: new HookMap(() => new SyncBailHook(["declaration"])),
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pattern: new HookMap(() => new SyncBailHook(["pattern"])),
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/** @type {HookMap<SyncBailHook<[ExpressionNode], boolean | void>>} */
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canRename: new HookMap(() => new SyncBailHook(["initExpression"])),
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/** @type {HookMap<SyncBailHook<[ExpressionNode], boolean | void>>} */
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rename: new HookMap(() => new SyncBailHook(["initExpression"])),
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/** @type {HookMap<SyncBailHook<[import("estree").AssignmentExpression], boolean | void>>} */
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assign: new HookMap(() => new SyncBailHook(["expression"])),
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/** @type {HookMap<SyncBailHook<[import("estree").AssignmentExpression, string[]], boolean | void>>} */
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assignMemberChain: new HookMap(
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() => new SyncBailHook(["expression", "members"])
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),
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/** @type {HookMap<SyncBailHook<[ExpressionNode], boolean | void>>} */
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typeof: new HookMap(() => new SyncBailHook(["expression"])),
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/** @type {SyncBailHook<[ExpressionNode], boolean | void>} */
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importCall: new SyncBailHook(["expression"]),
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/** @type {SyncBailHook<[ExpressionNode], boolean | void>} */
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topLevelAwait: new SyncBailHook(["expression"]),
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/** @type {HookMap<SyncBailHook<[ExpressionNode], boolean | void>>} */
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call: new HookMap(() => new SyncBailHook(["expression"])),
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/** Something like "a.b()" */
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/** @type {HookMap<SyncBailHook<[ExpressionNode, string[]], boolean | void>>} */
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callMemberChain: new HookMap(
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() => new SyncBailHook(["expression", "members"])
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),
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/** Something like "a.b().c.d" */
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/** @type {HookMap<SyncBailHook<[ExpressionNode, string[], CallExpressionNode, string[]], boolean | void>>} */
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memberChainOfCallMemberChain: new HookMap(
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() =>
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new SyncBailHook([
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"expression",
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"calleeMembers",
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"callExpression",
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"members"
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])
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),
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/** Something like "a.b().c.d()"" */
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/** @type {HookMap<SyncBailHook<[ExpressionNode, string[], CallExpressionNode, string[]], boolean | void>>} */
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callMemberChainOfCallMemberChain: new HookMap(
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() =>
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new SyncBailHook([
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"expression",
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"calleeMembers",
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"innerCallExpression",
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"members"
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])
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),
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/** @type {HookMap<SyncBailHook<[ExpressionNode], boolean | void>>} */
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new: new HookMap(() => new SyncBailHook(["expression"])),
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/** @type {HookMap<SyncBailHook<[ExpressionNode], boolean | void>>} */
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expression: new HookMap(() => new SyncBailHook(["expression"])),
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/** @type {HookMap<SyncBailHook<[ExpressionNode, string[]], boolean | void>>} */
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expressionMemberChain: new HookMap(
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() => new SyncBailHook(["expression", "members"])
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),
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/** @type {SyncBailHook<[ExpressionNode], boolean | void>} */
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expressionConditionalOperator: new SyncBailHook(["expression"]),
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/** @type {SyncBailHook<[ExpressionNode], boolean | void>} */
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expressionLogicalOperator: new SyncBailHook(["expression"]),
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/** @type {SyncBailHook<[ProgramNode, CommentNode[]], boolean | void>} */
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program: new SyncBailHook(["ast", "comments"]),
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/** @type {SyncBailHook<[ProgramNode, CommentNode[]], boolean | void>} */
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finish: new SyncBailHook(["ast", "comments"])
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});
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this.options = options;
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this.sourceType = sourceType;
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/** @type {ScopeInfo} */
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this.scope = undefined;
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/** @type {ParserState} */
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this.state = undefined;
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this.comments = undefined;
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this.semicolons = undefined;
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this.statementEndPos = undefined;
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this.lastStatementEndPos = undefined;
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this.statementStartPos = undefined;
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this.currentTagData = undefined;
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this.initializeEvaluating();
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}
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initializeEvaluating() {
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this.hooks.evaluate.for("Literal").tap("JavascriptParser", _expr => {
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const expr = /** @type {LiteralNode} */ (_expr);
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switch (typeof expr.value) {
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case "number":
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return new BasicEvaluatedExpression()
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.setNumber(expr.value)
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.setRange(expr.range);
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case "bigint":
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return new BasicEvaluatedExpression()
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.setBigInt(expr.value)
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.setRange(expr.range);
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case "string":
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return new BasicEvaluatedExpression()
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.setString(expr.value)
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.setRange(expr.range);
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case "boolean":
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return new BasicEvaluatedExpression()
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.setBoolean(expr.value)
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.setRange(expr.range);
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}
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if (expr.value === null) {
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return new BasicEvaluatedExpression().setNull().setRange(expr.range);
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}
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if (expr.value instanceof RegExp) {
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return new BasicEvaluatedExpression()
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.setRegExp(expr.value)
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.setRange(expr.range);
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}
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});
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this.hooks.evaluate
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.for("LogicalExpression")
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.tap("JavascriptParser", _expr => {
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const expr = /** @type {LogicalExpressionNode} */ (_expr);
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let left;
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let leftAsBool;
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let right;
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if (expr.operator === "&&") {
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left = this.evaluateExpression(expr.left);
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leftAsBool = left && left.asBool();
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if (leftAsBool === false) return left.setRange(expr.range);
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if (leftAsBool !== true) return;
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right = this.evaluateExpression(expr.right);
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return right.setRange(expr.range);
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} else if (expr.operator === "||") {
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left = this.evaluateExpression(expr.left);
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leftAsBool = left && left.asBool();
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if (leftAsBool === true) return left.setRange(expr.range);
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if (leftAsBool !== false) return;
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right = this.evaluateExpression(expr.right);
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return right.setRange(expr.range);
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}
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});
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this.hooks.evaluate
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.for("BinaryExpression")
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.tap("JavascriptParser", _expr => {
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const expr = /** @type {BinaryExpressionNode} */ (_expr);
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let left;
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let right;
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let res;
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if (expr.operator === "+") {
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left = this.evaluateExpression(expr.left);
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right = this.evaluateExpression(expr.right);
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if (!left || !right) return;
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res = new BasicEvaluatedExpression();
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if (left.isString()) {
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if (right.isString()) {
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res.setString(left.string + right.string);
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} else if (right.isNumber()) {
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res.setString(left.string + right.number);
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} else if (
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right.isWrapped() &&
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right.prefix &&
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right.prefix.isString()
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) {
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// "left" + ("prefix" + inner + "postfix")
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// => ("leftPrefix" + inner + "postfix")
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res.setWrapped(
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new BasicEvaluatedExpression()
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.setString(left.string + right.prefix.string)
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.setRange(joinRanges(left.range, right.prefix.range)),
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right.postfix,
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right.wrappedInnerExpressions
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);
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} else if (right.isWrapped()) {
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// "left" + ([null] + inner + "postfix")
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// => ("left" + inner + "postfix")
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res.setWrapped(
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left,
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right.postfix,
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right.wrappedInnerExpressions
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);
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} else {
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// "left" + expr
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// => ("left" + expr + "")
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res.setWrapped(left, null, [right]);
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}
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} else if (left.isNumber()) {
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if (right.isString()) {
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res.setString(left.number + right.string);
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} else if (right.isNumber()) {
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res.setNumber(left.number + right.number);
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} else {
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return;
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}
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} else if (left.isBigInt()) {
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if (right.isBigInt()) {
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res.setBigInt(left.bigint + right.bigint);
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}
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} else if (left.isWrapped()) {
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if (left.postfix && left.postfix.isString() && right.isString()) {
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// ("prefix" + inner + "postfix") + "right"
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// => ("prefix" + inner + "postfixRight")
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res.setWrapped(
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left.prefix,
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new BasicEvaluatedExpression()
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.setString(left.postfix.string + right.string)
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.setRange(joinRanges(left.postfix.range, right.range)),
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left.wrappedInnerExpressions
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);
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} else if (
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left.postfix &&
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left.postfix.isString() &&
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right.isNumber()
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) {
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// ("prefix" + inner + "postfix") + 123
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// => ("prefix" + inner + "postfix123")
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res.setWrapped(
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left.prefix,
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new BasicEvaluatedExpression()
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.setString(left.postfix.string + right.number)
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.setRange(joinRanges(left.postfix.range, right.range)),
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left.wrappedInnerExpressions
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);
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} else if (right.isString()) {
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// ("prefix" + inner + [null]) + "right"
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// => ("prefix" + inner + "right")
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res.setWrapped(left.prefix, right, left.wrappedInnerExpressions);
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} else if (right.isNumber()) {
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// ("prefix" + inner + [null]) + 123
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// => ("prefix" + inner + "123")
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res.setWrapped(
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left.prefix,
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new BasicEvaluatedExpression()
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.setString(right.number + "")
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.setRange(right.range),
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|
left.wrappedInnerExpressions
|
|
);
|
|
} else if (right.isWrapped()) {
|
|
// ("prefix1" + inner1 + "postfix1") + ("prefix2" + inner2 + "postfix2")
|
|
// ("prefix1" + inner1 + "postfix1" + "prefix2" + inner2 + "postfix2")
|
|
res.setWrapped(
|
|
left.prefix,
|
|
right.postfix,
|
|
left.wrappedInnerExpressions &&
|
|
right.wrappedInnerExpressions &&
|
|
left.wrappedInnerExpressions
|
|
.concat(left.postfix ? [left.postfix] : [])
|
|
.concat(right.prefix ? [right.prefix] : [])
|
|
.concat(right.wrappedInnerExpressions)
|
|
);
|
|
} else {
|
|
// ("prefix" + inner + postfix) + expr
|
|
// => ("prefix" + inner + postfix + expr + [null])
|
|
res.setWrapped(
|
|
left.prefix,
|
|
null,
|
|
left.wrappedInnerExpressions &&
|
|
left.wrappedInnerExpressions.concat(
|
|
left.postfix ? [left.postfix, right] : [right]
|
|
)
|
|
);
|
|
}
|
|
} else {
|
|
if (right.isString()) {
|
|
// left + "right"
|
|
// => ([null] + left + "right")
|
|
res.setWrapped(null, right, [left]);
|
|
} else if (right.isWrapped()) {
|
|
// left + (prefix + inner + "postfix")
|
|
// => ([null] + left + prefix + inner + "postfix")
|
|
res.setWrapped(
|
|
null,
|
|
right.postfix,
|
|
right.wrappedInnerExpressions &&
|
|
(right.prefix ? [left, right.prefix] : [left]).concat(
|
|
right.wrappedInnerExpressions
|
|
)
|
|
);
|
|
} else {
|
|
return;
|
|
}
|
|
}
|
|
res.setRange(expr.range);
|
|
return res;
|
|
} else if (expr.operator === "-") {
|
|
left = this.evaluateExpression(expr.left);
|
|
right = this.evaluateExpression(expr.right);
|
|
if (!left || !right) return;
|
|
if (left.isNumber() && right.isNumber()) {
|
|
res = new BasicEvaluatedExpression();
|
|
res.setNumber(left.number - right.number);
|
|
res.setRange(expr.range);
|
|
return res;
|
|
} else if (left.isBigInt() && right.isBigInt()) {
|
|
res = new BasicEvaluatedExpression();
|
|
res.setBigInt(left.bigint - right.bigint);
|
|
res.setRange(expr.range);
|
|
return res;
|
|
}
|
|
} else if (expr.operator === "*") {
|
|
left = this.evaluateExpression(expr.left);
|
|
right = this.evaluateExpression(expr.right);
|
|
if (!left || !right) return;
|
|
if (left.isNumber() && right.isNumber()) {
|
|
res = new BasicEvaluatedExpression();
|
|
res.setNumber(left.number * right.number);
|
|
res.setRange(expr.range);
|
|
return res;
|
|
} else if (left.isBigInt() && right.isBigInt()) {
|
|
res = new BasicEvaluatedExpression();
|
|
res.setBigInt(left.bigint * right.bigint);
|
|
res.setRange(expr.range);
|
|
return res;
|
|
}
|
|
} else if (expr.operator === "/") {
|
|
left = this.evaluateExpression(expr.left);
|
|
right = this.evaluateExpression(expr.right);
|
|
if (!left || !right) return;
|
|
|
|
if (left.isNumber() && right.isNumber()) {
|
|
res = new BasicEvaluatedExpression();
|
|
res.setNumber(left.number / right.number);
|
|
res.setRange(expr.range);
|
|
return res;
|
|
} else if (left.isBigInt() && right.isBigInt()) {
|
|
res = new BasicEvaluatedExpression();
|
|
res.setBigInt(left.bigint / right.bigint);
|
|
res.setRange(expr.range);
|
|
return res;
|
|
}
|
|
} else if (expr.operator === "**") {
|
|
left = this.evaluateExpression(expr.left);
|
|
right = this.evaluateExpression(expr.right);
|
|
if (!left || !right) return;
|
|
if (left.isNumber() && right.isNumber()) {
|
|
res = new BasicEvaluatedExpression();
|
|
res.setNumber(left.number ** right.number);
|
|
res.setRange(expr.range);
|
|
return res;
|
|
} else if (left.isBigInt() && right.isBigInt()) {
|
|
res = new BasicEvaluatedExpression();
|
|
res.setBigInt(left.bigint ** right.bigint);
|
|
res.setRange(expr.range);
|
|
return res;
|
|
}
|
|
} else if (expr.operator === "==" || expr.operator === "===") {
|
|
left = this.evaluateExpression(expr.left);
|
|
right = this.evaluateExpression(expr.right);
|
|
if (!left || !right) return;
|
|
res = new BasicEvaluatedExpression();
|
|
res.setRange(expr.range);
|
|
if (left.isString() && right.isString()) {
|
|
return res.setBoolean(left.string === right.string);
|
|
} else if (left.isNumber() && right.isNumber()) {
|
|
return res.setBoolean(left.number === right.number);
|
|
} else if (left.isBigInt() && right.isBigInt()) {
|
|
return res.setBoolean(left.bigint === right.bigint);
|
|
} else if (left.isBoolean() && right.isBoolean()) {
|
|
return res.setBoolean(left.bool === right.bool);
|
|
} else if (left.isNull() && right.isNull()) {
|
|
return res.setBoolean(true);
|
|
}
|
|
} else if (expr.operator === "!=" || expr.operator === "!==") {
|
|
left = this.evaluateExpression(expr.left);
|
|
right = this.evaluateExpression(expr.right);
|
|
if (!left || !right) return;
|
|
res = new BasicEvaluatedExpression();
|
|
res.setRange(expr.range);
|
|
if (left.isString() && right.isString()) {
|
|
return res.setBoolean(left.string !== right.string);
|
|
} else if (left.isNumber() && right.isNumber()) {
|
|
return res.setBoolean(left.number !== right.number);
|
|
} else if (left.isBigInt() && right.isBigInt()) {
|
|
return res.setBoolean(left.bigint !== right.bigint);
|
|
} else if (left.isBoolean() && right.isBoolean()) {
|
|
return res.setBoolean(left.bool !== right.bool);
|
|
} else if (left.isNull() && right.isNull()) {
|
|
return res.setBoolean(false);
|
|
}
|
|
} else if (expr.operator === "&") {
|
|
left = this.evaluateExpression(expr.left);
|
|
right = this.evaluateExpression(expr.right);
|
|
if (!left || !right) return;
|
|
if (left.isNumber() && right.isNumber()) {
|
|
res = new BasicEvaluatedExpression();
|
|
res.setNumber(left.number & right.number);
|
|
res.setRange(expr.range);
|
|
return res;
|
|
} else if (left.isBigInt() && right.isBigInt()) {
|
|
res = new BasicEvaluatedExpression();
|
|
res.setBigInt(left.bigint & right.bigint);
|
|
res.setRange(expr.range);
|
|
return res;
|
|
}
|
|
} else if (expr.operator === "|") {
|
|
left = this.evaluateExpression(expr.left);
|
|
right = this.evaluateExpression(expr.right);
|
|
if (!left || !right) return;
|
|
if (left.isNumber() && right.isNumber()) {
|
|
res = new BasicEvaluatedExpression();
|
|
res.setNumber(left.number | right.number);
|
|
res.setRange(expr.range);
|
|
return res;
|
|
} else if (left.isBigInt() && right.isBigInt()) {
|
|
res = new BasicEvaluatedExpression();
|
|
res.setBigInt(left.bigint | right.bigint);
|
|
res.setRange(expr.range);
|
|
return res;
|
|
}
|
|
} else if (expr.operator === "^") {
|
|
left = this.evaluateExpression(expr.left);
|
|
right = this.evaluateExpression(expr.right);
|
|
if (!left || !right) return;
|
|
if (left.isNumber() && right.isNumber()) {
|
|
res = new BasicEvaluatedExpression();
|
|
res.setNumber(left.number ^ right.number);
|
|
res.setRange(expr.range);
|
|
return res;
|
|
} else if (left.isBigInt() && right.isBigInt()) {
|
|
res = new BasicEvaluatedExpression();
|
|
res.setBigInt(left.bigint ^ right.bigint);
|
|
res.setRange(expr.range);
|
|
return res;
|
|
}
|
|
} else if (expr.operator === ">>>") {
|
|
left = this.evaluateExpression(expr.left);
|
|
right = this.evaluateExpression(expr.right);
|
|
if (!left || !right) return;
|
|
if (!left.isNumber() || !right.isNumber()) return;
|
|
res = new BasicEvaluatedExpression();
|
|
res.setNumber(left.number >>> right.number);
|
|
res.setRange(expr.range);
|
|
return res;
|
|
} else if (expr.operator === ">>") {
|
|
left = this.evaluateExpression(expr.left);
|
|
right = this.evaluateExpression(expr.right);
|
|
if (!left || !right) return;
|
|
if (left.isNumber() && right.isNumber()) {
|
|
res = new BasicEvaluatedExpression();
|
|
res.setNumber(left.number >> right.number);
|
|
res.setRange(expr.range);
|
|
return res;
|
|
} else if (left.isBigInt() && right.isBigInt()) {
|
|
res = new BasicEvaluatedExpression();
|
|
res.setBigInt(left.bigint >> right.bigint);
|
|
res.setRange(expr.range);
|
|
return res;
|
|
}
|
|
} else if (expr.operator === "<<") {
|
|
left = this.evaluateExpression(expr.left);
|
|
right = this.evaluateExpression(expr.right);
|
|
if (!left || !right) return;
|
|
if (left.isNumber() && right.isNumber()) {
|
|
res = new BasicEvaluatedExpression();
|
|
res.setNumber(left.number << right.number);
|
|
res.setRange(expr.range);
|
|
return res;
|
|
} else if (left.isBigInt() && right.isBigInt()) {
|
|
res = new BasicEvaluatedExpression();
|
|
res.setBigInt(left.bigint << right.bigint);
|
|
res.setRange(expr.range);
|
|
return res;
|
|
}
|
|
}
|
|
});
|
|
this.hooks.evaluate
|
|
.for("UnaryExpression")
|
|
.tap("JavascriptParser", _expr => {
|
|
const expr = /** @type {UnaryExpressionNode} */ (_expr);
|
|
|
|
if (expr.operator === "typeof") {
|
|
if (expr.argument.type === "Identifier") {
|
|
const res = this.callHooksForName(
|
|
this.hooks.evaluateTypeof,
|
|
expr.argument.name,
|
|
expr
|
|
);
|
|
if (res !== undefined) return res;
|
|
}
|
|
if (expr.argument.type === "MemberExpression") {
|
|
const res = this.callHooksForExpression(
|
|
this.hooks.evaluateTypeof,
|
|
expr.argument,
|
|
expr
|
|
);
|
|
if (res !== undefined) return res;
|
|
}
|
|
if (expr.argument.type === "FunctionExpression") {
|
|
return new BasicEvaluatedExpression()
|
|
.setString("function")
|
|
.setRange(expr.range);
|
|
}
|
|
const arg = this.evaluateExpression(expr.argument);
|
|
if (arg.isString() || arg.isWrapped()) {
|
|
return new BasicEvaluatedExpression()
|
|
.setString("string")
|
|
.setRange(expr.range);
|
|
}
|
|
if (arg.isNull()) {
|
|
return new BasicEvaluatedExpression()
|
|
.setString("object")
|
|
.setRange(expr.range);
|
|
}
|
|
if (arg.isNumber()) {
|
|
return new BasicEvaluatedExpression()
|
|
.setString("number")
|
|
.setRange(expr.range);
|
|
}
|
|
if (arg.isBigInt()) {
|
|
return new BasicEvaluatedExpression()
|
|
.setString("bigint")
|
|
.setRange(expr.range);
|
|
}
|
|
if (arg.isBoolean()) {
|
|
return new BasicEvaluatedExpression()
|
|
.setString("boolean")
|
|
.setRange(expr.range);
|
|
}
|
|
if (arg.isArray() || arg.isConstArray() || arg.isRegExp()) {
|
|
return new BasicEvaluatedExpression()
|
|
.setString("object")
|
|
.setRange(expr.range);
|
|
}
|
|
} else if (expr.operator === "!") {
|
|
const argument = this.evaluateExpression(expr.argument);
|
|
if (!argument) return;
|
|
if (argument.isBoolean()) {
|
|
return new BasicEvaluatedExpression()
|
|
.setBoolean(!argument.bool)
|
|
.setRange(expr.range);
|
|
}
|
|
if (argument.isNull()) {
|
|
return new BasicEvaluatedExpression()
|
|
.setBoolean(true)
|
|
.setRange(expr.range);
|
|
}
|
|
if (argument.isTruthy()) {
|
|
return new BasicEvaluatedExpression()
|
|
.setBoolean(false)
|
|
.setRange(expr.range);
|
|
}
|
|
if (argument.isFalsy()) {
|
|
return new BasicEvaluatedExpression()
|
|
.setBoolean(true)
|
|
.setRange(expr.range);
|
|
}
|
|
if (argument.isString()) {
|
|
return new BasicEvaluatedExpression()
|
|
.setBoolean(!argument.string)
|
|
.setRange(expr.range);
|
|
}
|
|
if (argument.isNumber()) {
|
|
return new BasicEvaluatedExpression()
|
|
.setBoolean(!argument.number)
|
|
.setRange(expr.range);
|
|
}
|
|
} else if (expr.operator === "~") {
|
|
const argument = this.evaluateExpression(expr.argument);
|
|
if (!argument) return;
|
|
if (!argument.isNumber()) return;
|
|
const res = new BasicEvaluatedExpression();
|
|
res.setNumber(~argument.number);
|
|
res.setRange(expr.range);
|
|
return res;
|
|
} else if (expr.operator === "+") {
|
|
const argument = this.evaluateExpression(expr.argument);
|
|
if (!argument) return;
|
|
if (argument.isNumber()) {
|
|
const res = new BasicEvaluatedExpression();
|
|
res.setNumber(+argument.number);
|
|
res.setRange(expr.range);
|
|
return res;
|
|
} else if (argument.isString()) {
|
|
const res = new BasicEvaluatedExpression();
|
|
res.setNumber(+argument.string);
|
|
res.setRange(expr.range);
|
|
return res;
|
|
}
|
|
} else if (expr.operator === "-") {
|
|
const argument = this.evaluateExpression(expr.argument);
|
|
if (!argument) return;
|
|
if (argument.isNumber()) {
|
|
const res = new BasicEvaluatedExpression();
|
|
res.setNumber(-argument.number);
|
|
res.setRange(expr.range);
|
|
return res;
|
|
}
|
|
}
|
|
});
|
|
this.hooks.evaluateTypeof.for("undefined").tap("JavascriptParser", expr => {
|
|
return new BasicEvaluatedExpression()
|
|
.setString("undefined")
|
|
.setRange(expr.range);
|
|
});
|
|
this.hooks.evaluate.for("Identifier").tap("JavascriptParser", _expr => {
|
|
const expr = /** @type {IdentifierNode} */ (_expr);
|
|
|
|
return this.callHooksForNameWithFallback(
|
|
this.hooks.evaluateIdentifier,
|
|
expr.name,
|
|
name =>
|
|
new BasicEvaluatedExpression()
|
|
.setIdentifier(name, this.getVariableInfo(expr.name), () => [])
|
|
.setRange(expr.range),
|
|
() => {
|
|
const hook = this.hooks.evaluateDefinedIdentifier.get(expr.name);
|
|
if (hook !== undefined) {
|
|
return hook.call(expr);
|
|
}
|
|
},
|
|
expr
|
|
);
|
|
});
|
|
this.hooks.evaluate.for("ThisExpression").tap("JavascriptParser", _expr => {
|
|
const expr = /** @type {ThisExpressionNode} */ (_expr);
|
|
|
|
return this.callHooksForNameWithFallback(
|
|
this.hooks.evaluateIdentifier,
|
|
"this",
|
|
name =>
|
|
new BasicEvaluatedExpression()
|
|
.setIdentifier(name, this.getVariableInfo("this"), () => [])
|
|
.setRange(expr.range),
|
|
() => {
|
|
const hook = this.hooks.evaluateDefinedIdentifier.get("this");
|
|
if (hook !== undefined) {
|
|
return hook.call(expr);
|
|
}
|
|
},
|
|
expr
|
|
);
|
|
});
|
|
this.hooks.evaluate
|
|
.for("MemberExpression")
|
|
.tap("JavascriptParser", expr => {
|
|
const expression = /** @type {MemberExpressionNode} */ (expr);
|
|
|
|
return this.callHooksForExpressionWithFallback(
|
|
this.hooks.evaluateIdentifier,
|
|
expression,
|
|
(name, rootInfo, getMembers) =>
|
|
new BasicEvaluatedExpression()
|
|
.setIdentifier(name, rootInfo, getMembers)
|
|
.setRange(expression.range),
|
|
name => {
|
|
const hook = this.hooks.evaluateDefinedIdentifier.get(name);
|
|
if (hook !== undefined) {
|
|
return hook.call(expression);
|
|
}
|
|
},
|
|
expression
|
|
);
|
|
});
|
|
this.hooks.evaluate.for("CallExpression").tap("JavascriptParser", _expr => {
|
|
const expr = /** @type {CallExpressionNode} */ (_expr);
|
|
if (
|
|
expr.callee.type !== "MemberExpression" ||
|
|
expr.callee.property.type !==
|
|
(expr.callee.computed ? "Literal" : "Identifier")
|
|
) {
|
|
return;
|
|
}
|
|
|
|
// type Super also possible here
|
|
const param = this.evaluateExpression(
|
|
/** @type {ExpressionNode} */ (expr.callee.object)
|
|
);
|
|
if (!param) return;
|
|
const property =
|
|
expr.callee.property.type === "Literal"
|
|
? `${expr.callee.property.value}`
|
|
: expr.callee.property.name;
|
|
const hook = this.hooks.evaluateCallExpressionMember.get(property);
|
|
if (hook !== undefined) {
|
|
return hook.call(expr, param);
|
|
}
|
|
});
|
|
this.hooks.evaluateCallExpressionMember
|
|
.for("replace")
|
|
.tap("JavascriptParser", (expr, param) => {
|
|
if (!param.isString()) return;
|
|
if (expr.arguments.length !== 2) return;
|
|
if (expr.arguments[0].type === "SpreadElement") return;
|
|
if (expr.arguments[1].type === "SpreadElement") return;
|
|
let arg1 = this.evaluateExpression(expr.arguments[0]);
|
|
let arg2 = this.evaluateExpression(expr.arguments[1]);
|
|
if (!arg1.isString() && !arg1.isRegExp()) return;
|
|
arg1 = arg1.regExp || arg1.string;
|
|
if (!arg2.isString()) return;
|
|
arg2 = arg2.string;
|
|
return new BasicEvaluatedExpression()
|
|
.setString(param.string.replace(arg1, arg2))
|
|
.setRange(expr.range);
|
|
});
|
|
["substr", "substring"].forEach(fn => {
|
|
this.hooks.evaluateCallExpressionMember
|
|
.for(fn)
|
|
.tap("JavascriptParser", (expr, param) => {
|
|
if (!param.isString()) return;
|
|
let arg1;
|
|
let result,
|
|
str = param.string;
|
|
switch (expr.arguments.length) {
|
|
case 1:
|
|
if (expr.arguments[0].type === "SpreadElement") return;
|
|
arg1 = this.evaluateExpression(expr.arguments[0]);
|
|
if (!arg1.isNumber()) return;
|
|
result = str[fn](arg1.number);
|
|
break;
|
|
case 2: {
|
|
if (expr.arguments[0].type === "SpreadElement") return;
|
|
if (expr.arguments[1].type === "SpreadElement") return;
|
|
arg1 = this.evaluateExpression(expr.arguments[0]);
|
|
const arg2 = this.evaluateExpression(expr.arguments[1]);
|
|
if (!arg1.isNumber()) return;
|
|
if (!arg2.isNumber()) return;
|
|
result = str[fn](arg1.number, arg2.number);
|
|
break;
|
|
}
|
|
default:
|
|
return;
|
|
}
|
|
return new BasicEvaluatedExpression()
|
|
.setString(result)
|
|
.setRange(expr.range);
|
|
});
|
|
});
|
|
|
|
/**
|
|
* @param {"cooked" | "raw"} kind kind of values to get
|
|
* @param {TemplateLiteralNode} templateLiteralExpr TemplateLiteral expr
|
|
* @returns {{quasis: BasicEvaluatedExpression[], parts: BasicEvaluatedExpression[]}} Simplified template
|
|
*/
|
|
const getSimplifiedTemplateResult = (kind, templateLiteralExpr) => {
|
|
/** @type {BasicEvaluatedExpression[]} */
|
|
const quasis = [];
|
|
/** @type {BasicEvaluatedExpression[]} */
|
|
const parts = [];
|
|
|
|
for (let i = 0; i < templateLiteralExpr.quasis.length; i++) {
|
|
const quasiExpr = templateLiteralExpr.quasis[i];
|
|
const quasi = quasiExpr.value[kind];
|
|
|
|
if (i > 0) {
|
|
const prevExpr = parts[parts.length - 1];
|
|
const expr = this.evaluateExpression(
|
|
templateLiteralExpr.expressions[i - 1]
|
|
);
|
|
const exprAsString = expr.asString();
|
|
if (typeof exprAsString === "string") {
|
|
// We can merge quasi + expr + quasi when expr
|
|
// is a const string
|
|
|
|
prevExpr.setString(prevExpr.string + exprAsString + quasi);
|
|
prevExpr.setRange([prevExpr.range[0], quasiExpr.range[1]]);
|
|
// We unset the expression as it doesn't match to a single expression
|
|
prevExpr.setExpression(undefined);
|
|
continue;
|
|
}
|
|
parts.push(expr);
|
|
}
|
|
|
|
const part = new BasicEvaluatedExpression()
|
|
.setString(quasi)
|
|
.setRange(quasiExpr.range)
|
|
.setExpression(quasiExpr);
|
|
quasis.push(part);
|
|
parts.push(part);
|
|
}
|
|
return {
|
|
quasis,
|
|
parts
|
|
};
|
|
};
|
|
|
|
this.hooks.evaluate
|
|
.for("TemplateLiteral")
|
|
.tap("JavascriptParser", _node => {
|
|
const node = /** @type {TemplateLiteralNode} */ (_node);
|
|
|
|
const { quasis, parts } = getSimplifiedTemplateResult("cooked", node);
|
|
if (parts.length === 1) {
|
|
return parts[0].setRange(node.range);
|
|
}
|
|
return new BasicEvaluatedExpression()
|
|
.setTemplateString(quasis, parts, "cooked")
|
|
.setRange(node.range);
|
|
});
|
|
this.hooks.evaluate
|
|
.for("TaggedTemplateExpression")
|
|
.tap("JavascriptParser", _node => {
|
|
const node = /** @type {TaggedTemplateExpressionNode} */ (_node);
|
|
|
|
if (this.evaluateExpression(node.tag).identifier !== "String.raw")
|
|
return;
|
|
const { quasis, parts } = getSimplifiedTemplateResult(
|
|
"raw",
|
|
node.quasi
|
|
);
|
|
if (parts.length === 1) {
|
|
return parts[0].setRange(node.range);
|
|
}
|
|
return new BasicEvaluatedExpression()
|
|
.setTemplateString(quasis, parts, "raw")
|
|
.setRange(node.range);
|
|
});
|
|
|
|
this.hooks.evaluateCallExpressionMember
|
|
.for("concat")
|
|
.tap("JavascriptParser", (expr, param) => {
|
|
if (!param.isString() && !param.isWrapped()) return;
|
|
|
|
let stringSuffix = null;
|
|
let hasUnknownParams = false;
|
|
const innerExpressions = [];
|
|
for (let i = expr.arguments.length - 1; i >= 0; i--) {
|
|
const arg = expr.arguments[i];
|
|
if (arg.type === "SpreadElement") return;
|
|
const argExpr = this.evaluateExpression(arg);
|
|
if (
|
|
hasUnknownParams ||
|
|
(!argExpr.isString() && !argExpr.isNumber())
|
|
) {
|
|
hasUnknownParams = true;
|
|
innerExpressions.push(argExpr);
|
|
continue;
|
|
}
|
|
|
|
const value = argExpr.isString()
|
|
? argExpr.string
|
|
: "" + argExpr.number;
|
|
|
|
const newString = value + (stringSuffix ? stringSuffix.string : "");
|
|
const newRange = [
|
|
argExpr.range[0],
|
|
(stringSuffix || argExpr).range[1]
|
|
];
|
|
stringSuffix = new BasicEvaluatedExpression()
|
|
.setString(newString)
|
|
.setRange(newRange);
|
|
}
|
|
|
|
if (hasUnknownParams) {
|
|
const prefix = param.isString() ? param : param.prefix;
|
|
const inner =
|
|
param.isWrapped() && param.wrappedInnerExpressions
|
|
? param.wrappedInnerExpressions.concat(innerExpressions.reverse())
|
|
: innerExpressions.reverse();
|
|
return new BasicEvaluatedExpression()
|
|
.setWrapped(prefix, stringSuffix, inner)
|
|
.setRange(expr.range);
|
|
} else if (param.isWrapped()) {
|
|
const postfix = stringSuffix || param.postfix;
|
|
const inner = param.wrappedInnerExpressions
|
|
? param.wrappedInnerExpressions.concat(innerExpressions.reverse())
|
|
: innerExpressions.reverse();
|
|
return new BasicEvaluatedExpression()
|
|
.setWrapped(param.prefix, postfix, inner)
|
|
.setRange(expr.range);
|
|
} else {
|
|
const newString =
|
|
param.string + (stringSuffix ? stringSuffix.string : "");
|
|
return new BasicEvaluatedExpression()
|
|
.setString(newString)
|
|
.setRange(expr.range);
|
|
}
|
|
});
|
|
this.hooks.evaluateCallExpressionMember
|
|
.for("split")
|
|
.tap("JavascriptParser", (expr, param) => {
|
|
if (!param.isString()) return;
|
|
if (expr.arguments.length !== 1) return;
|
|
if (expr.arguments[0].type === "SpreadElement") return;
|
|
let result;
|
|
const arg = this.evaluateExpression(expr.arguments[0]);
|
|
if (arg.isString()) {
|
|
result = param.string.split(arg.string);
|
|
} else if (arg.isRegExp()) {
|
|
result = param.string.split(arg.regExp);
|
|
} else {
|
|
return;
|
|
}
|
|
return new BasicEvaluatedExpression()
|
|
.setArray(result)
|
|
.setRange(expr.range);
|
|
});
|
|
this.hooks.evaluate
|
|
.for("ConditionalExpression")
|
|
.tap("JavascriptParser", _expr => {
|
|
const expr = /** @type {ConditionalExpressionNode} */ (_expr);
|
|
|
|
const condition = this.evaluateExpression(expr.test);
|
|
const conditionValue = condition.asBool();
|
|
let res;
|
|
if (conditionValue === undefined) {
|
|
const consequent = this.evaluateExpression(expr.consequent);
|
|
const alternate = this.evaluateExpression(expr.alternate);
|
|
if (!consequent || !alternate) return;
|
|
res = new BasicEvaluatedExpression();
|
|
if (consequent.isConditional()) {
|
|
res.setOptions(consequent.options);
|
|
} else {
|
|
res.setOptions([consequent]);
|
|
}
|
|
if (alternate.isConditional()) {
|
|
res.addOptions(alternate.options);
|
|
} else {
|
|
res.addOptions([alternate]);
|
|
}
|
|
} else {
|
|
res = this.evaluateExpression(
|
|
conditionValue ? expr.consequent : expr.alternate
|
|
);
|
|
}
|
|
res.setRange(expr.range);
|
|
return res;
|
|
});
|
|
this.hooks.evaluate
|
|
.for("ArrayExpression")
|
|
.tap("JavascriptParser", _expr => {
|
|
const expr = /** @type {ArrayExpressionNode} */ (_expr);
|
|
|
|
const items = expr.elements.map(element => {
|
|
return (
|
|
element !== null &&
|
|
element.type !== "SpreadElement" &&
|
|
this.evaluateExpression(element)
|
|
);
|
|
});
|
|
if (!items.every(Boolean)) return;
|
|
return new BasicEvaluatedExpression()
|
|
.setItems(items)
|
|
.setRange(expr.range);
|
|
});
|
|
}
|
|
|
|
getRenameIdentifier(expr) {
|
|
const result = this.evaluateExpression(expr);
|
|
if (result && result.isIdentifier()) {
|
|
return result.identifier;
|
|
}
|
|
}
|
|
|
|
/**
|
|
* @param {ClassExpressionNode | ClassDeclarationNode} classy a class node
|
|
* @returns {void}
|
|
*/
|
|
walkClass(classy) {
|
|
if (classy.superClass) {
|
|
if (!this.hooks.classExtendsExpression.call(classy.superClass, classy)) {
|
|
this.walkExpression(classy.superClass);
|
|
}
|
|
}
|
|
if (classy.body && classy.body.type === "ClassBody") {
|
|
const wasTopLevel = this.scope.topLevelScope;
|
|
for (const classElement of classy.body.body) {
|
|
if (!this.hooks.classBodyElement.call(classElement, classy)) {
|
|
if (classElement.type === "MethodDefinition") {
|
|
this.scope.topLevelScope = false;
|
|
this.walkMethodDefinition(classElement);
|
|
this.scope.topLevelScope = wasTopLevel;
|
|
}
|
|
// TODO add support for ClassProperty here once acorn supports it
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
walkMethodDefinition(methodDefinition) {
|
|
if (methodDefinition.computed && methodDefinition.key) {
|
|
this.walkExpression(methodDefinition.key);
|
|
}
|
|
if (methodDefinition.value) {
|
|
this.walkExpression(methodDefinition.value);
|
|
}
|
|
}
|
|
|
|
// Pre walking iterates the scope for variable declarations
|
|
preWalkStatements(statements) {
|
|
for (let index = 0, len = statements.length; index < len; index++) {
|
|
const statement = statements[index];
|
|
this.preWalkStatement(statement);
|
|
}
|
|
}
|
|
|
|
// Block pre walking iterates the scope for block variable declarations
|
|
blockPreWalkStatements(statements) {
|
|
for (let index = 0, len = statements.length; index < len; index++) {
|
|
const statement = statements[index];
|
|
this.blockPreWalkStatement(statement);
|
|
}
|
|
}
|
|
|
|
// Walking iterates the statements and expressions and processes them
|
|
walkStatements(statements) {
|
|
for (let index = 0, len = statements.length; index < len; index++) {
|
|
const statement = statements[index];
|
|
this.walkStatement(statement);
|
|
}
|
|
}
|
|
|
|
preWalkStatement(statement) {
|
|
if (this.hooks.preStatement.call(statement)) return;
|
|
switch (statement.type) {
|
|
case "BlockStatement":
|
|
this.preWalkBlockStatement(statement);
|
|
break;
|
|
case "DoWhileStatement":
|
|
this.preWalkDoWhileStatement(statement);
|
|
break;
|
|
case "ForInStatement":
|
|
this.preWalkForInStatement(statement);
|
|
break;
|
|
case "ForOfStatement":
|
|
this.preWalkForOfStatement(statement);
|
|
break;
|
|
case "ForStatement":
|
|
this.preWalkForStatement(statement);
|
|
break;
|
|
case "FunctionDeclaration":
|
|
this.preWalkFunctionDeclaration(statement);
|
|
break;
|
|
case "IfStatement":
|
|
this.preWalkIfStatement(statement);
|
|
break;
|
|
case "LabeledStatement":
|
|
this.preWalkLabeledStatement(statement);
|
|
break;
|
|
case "SwitchStatement":
|
|
this.preWalkSwitchStatement(statement);
|
|
break;
|
|
case "TryStatement":
|
|
this.preWalkTryStatement(statement);
|
|
break;
|
|
case "VariableDeclaration":
|
|
this.preWalkVariableDeclaration(statement);
|
|
break;
|
|
case "WhileStatement":
|
|
this.preWalkWhileStatement(statement);
|
|
break;
|
|
case "WithStatement":
|
|
this.preWalkWithStatement(statement);
|
|
break;
|
|
}
|
|
}
|
|
|
|
blockPreWalkStatement(statement) {
|
|
if (this.hooks.blockPreStatement.call(statement)) return;
|
|
switch (statement.type) {
|
|
case "ImportDeclaration":
|
|
this.blockPreWalkImportDeclaration(statement);
|
|
break;
|
|
case "ExportAllDeclaration":
|
|
this.blockPreWalkExportAllDeclaration(statement);
|
|
break;
|
|
case "ExportDefaultDeclaration":
|
|
this.blockPreWalkExportDefaultDeclaration(statement);
|
|
break;
|
|
case "ExportNamedDeclaration":
|
|
this.blockPreWalkExportNamedDeclaration(statement);
|
|
break;
|
|
case "VariableDeclaration":
|
|
this.blockPreWalkVariableDeclaration(statement);
|
|
break;
|
|
case "ClassDeclaration":
|
|
this.blockPreWalkClassDeclaration(statement);
|
|
break;
|
|
}
|
|
}
|
|
|
|
walkStatement(statement) {
|
|
this.lastStatementEndPos = this.statementEndPos;
|
|
this.statementEndPos = NaN;
|
|
this.statementStartPos = statement.range[0];
|
|
if (this.hooks.statement.call(statement) !== undefined) {
|
|
this.statementEndPos = statement.range[1];
|
|
return;
|
|
}
|
|
switch (statement.type) {
|
|
case "BlockStatement":
|
|
this.walkBlockStatement(statement);
|
|
break;
|
|
case "ClassDeclaration":
|
|
this.walkClassDeclaration(statement);
|
|
break;
|
|
case "DoWhileStatement":
|
|
this.walkDoWhileStatement(statement);
|
|
break;
|
|
case "ExportDefaultDeclaration":
|
|
this.walkExportDefaultDeclaration(statement);
|
|
break;
|
|
case "ExportNamedDeclaration":
|
|
this.walkExportNamedDeclaration(statement);
|
|
break;
|
|
case "ExpressionStatement":
|
|
this.walkExpressionStatement(statement);
|
|
break;
|
|
case "ForInStatement":
|
|
this.walkForInStatement(statement);
|
|
break;
|
|
case "ForOfStatement":
|
|
this.walkForOfStatement(statement);
|
|
break;
|
|
case "ForStatement":
|
|
this.walkForStatement(statement);
|
|
break;
|
|
case "FunctionDeclaration":
|
|
this.walkFunctionDeclaration(statement);
|
|
break;
|
|
case "IfStatement":
|
|
this.walkIfStatement(statement);
|
|
break;
|
|
case "LabeledStatement":
|
|
this.walkLabeledStatement(statement);
|
|
break;
|
|
case "ReturnStatement":
|
|
this.walkReturnStatement(statement);
|
|
break;
|
|
case "SwitchStatement":
|
|
this.walkSwitchStatement(statement);
|
|
break;
|
|
case "ThrowStatement":
|
|
this.walkThrowStatement(statement);
|
|
break;
|
|
case "TryStatement":
|
|
this.walkTryStatement(statement);
|
|
break;
|
|
case "VariableDeclaration":
|
|
this.walkVariableDeclaration(statement);
|
|
break;
|
|
case "WhileStatement":
|
|
this.walkWhileStatement(statement);
|
|
break;
|
|
case "WithStatement":
|
|
this.walkWithStatement(statement);
|
|
break;
|
|
}
|
|
this.statementEndPos = statement.range[1];
|
|
}
|
|
|
|
// Real Statements
|
|
preWalkBlockStatement(statement) {
|
|
this.preWalkStatements(statement.body);
|
|
}
|
|
|
|
walkBlockStatement(statement) {
|
|
this.inBlockScope(() => {
|
|
const body = statement.body;
|
|
this.blockPreWalkStatements(body);
|
|
this.walkStatements(body);
|
|
});
|
|
}
|
|
|
|
walkExpressionStatement(statement) {
|
|
this.walkExpression(statement.expression);
|
|
}
|
|
|
|
preWalkIfStatement(statement) {
|
|
this.preWalkStatement(statement.consequent);
|
|
if (statement.alternate) {
|
|
this.preWalkStatement(statement.alternate);
|
|
}
|
|
}
|
|
|
|
walkIfStatement(statement) {
|
|
const result = this.hooks.statementIf.call(statement);
|
|
if (result === undefined) {
|
|
this.walkExpression(statement.test);
|
|
this.walkStatement(statement.consequent);
|
|
if (statement.alternate) {
|
|
this.walkStatement(statement.alternate);
|
|
}
|
|
} else {
|
|
if (result) {
|
|
this.walkStatement(statement.consequent);
|
|
} else if (statement.alternate) {
|
|
this.walkStatement(statement.alternate);
|
|
}
|
|
}
|
|
}
|
|
|
|
preWalkLabeledStatement(statement) {
|
|
this.preWalkStatement(statement.body);
|
|
}
|
|
|
|
walkLabeledStatement(statement) {
|
|
const hook = this.hooks.label.get(statement.label.name);
|
|
if (hook !== undefined) {
|
|
const result = hook.call(statement);
|
|
if (result === true) return;
|
|
}
|
|
this.walkStatement(statement.body);
|
|
}
|
|
|
|
preWalkWithStatement(statement) {
|
|
this.preWalkStatement(statement.body);
|
|
}
|
|
|
|
walkWithStatement(statement) {
|
|
this.walkExpression(statement.object);
|
|
this.walkStatement(statement.body);
|
|
}
|
|
|
|
preWalkSwitchStatement(statement) {
|
|
this.preWalkSwitchCases(statement.cases);
|
|
}
|
|
|
|
walkSwitchStatement(statement) {
|
|
this.walkExpression(statement.discriminant);
|
|
this.walkSwitchCases(statement.cases);
|
|
}
|
|
|
|
walkTerminatingStatement(statement) {
|
|
if (statement.argument) this.walkExpression(statement.argument);
|
|
}
|
|
|
|
walkReturnStatement(statement) {
|
|
this.walkTerminatingStatement(statement);
|
|
}
|
|
|
|
walkThrowStatement(statement) {
|
|
this.walkTerminatingStatement(statement);
|
|
}
|
|
|
|
preWalkTryStatement(statement) {
|
|
this.preWalkStatement(statement.block);
|
|
if (statement.handler) this.preWalkCatchClause(statement.handler);
|
|
if (statement.finializer) this.preWalkStatement(statement.finializer);
|
|
}
|
|
|
|
walkTryStatement(statement) {
|
|
if (this.scope.inTry) {
|
|
this.walkStatement(statement.block);
|
|
} else {
|
|
this.scope.inTry = true;
|
|
this.walkStatement(statement.block);
|
|
this.scope.inTry = false;
|
|
}
|
|
if (statement.handler) this.walkCatchClause(statement.handler);
|
|
if (statement.finalizer) this.walkStatement(statement.finalizer);
|
|
}
|
|
|
|
preWalkWhileStatement(statement) {
|
|
this.preWalkStatement(statement.body);
|
|
}
|
|
|
|
walkWhileStatement(statement) {
|
|
this.walkExpression(statement.test);
|
|
this.walkStatement(statement.body);
|
|
}
|
|
|
|
preWalkDoWhileStatement(statement) {
|
|
this.preWalkStatement(statement.body);
|
|
}
|
|
|
|
walkDoWhileStatement(statement) {
|
|
this.walkStatement(statement.body);
|
|
this.walkExpression(statement.test);
|
|
}
|
|
|
|
preWalkForStatement(statement) {
|
|
if (statement.init) {
|
|
if (statement.init.type === "VariableDeclaration") {
|
|
this.preWalkStatement(statement.init);
|
|
}
|
|
}
|
|
this.preWalkStatement(statement.body);
|
|
}
|
|
|
|
walkForStatement(statement) {
|
|
this.inBlockScope(() => {
|
|
if (statement.init) {
|
|
if (statement.init.type === "VariableDeclaration") {
|
|
this.blockPreWalkVariableDeclaration(statement.init);
|
|
this.walkStatement(statement.init);
|
|
} else {
|
|
this.walkExpression(statement.init);
|
|
}
|
|
}
|
|
if (statement.test) {
|
|
this.walkExpression(statement.test);
|
|
}
|
|
if (statement.update) {
|
|
this.walkExpression(statement.update);
|
|
}
|
|
const body = statement.body;
|
|
if (body.type === "BlockStatement") {
|
|
// no need to add additional scope
|
|
this.blockPreWalkStatements(body.body);
|
|
this.walkStatements(body.body);
|
|
} else {
|
|
this.walkStatement(body);
|
|
}
|
|
});
|
|
}
|
|
|
|
preWalkForInStatement(statement) {
|
|
if (statement.left.type === "VariableDeclaration") {
|
|
this.preWalkVariableDeclaration(statement.left);
|
|
}
|
|
this.preWalkStatement(statement.body);
|
|
}
|
|
|
|
walkForInStatement(statement) {
|
|
this.inBlockScope(() => {
|
|
if (statement.left.type === "VariableDeclaration") {
|
|
this.blockPreWalkVariableDeclaration(statement.left);
|
|
this.walkVariableDeclaration(statement.left);
|
|
} else {
|
|
this.walkPattern(statement.left);
|
|
}
|
|
this.walkExpression(statement.right);
|
|
const body = statement.body;
|
|
if (body.type === "BlockStatement") {
|
|
// no need to add additional scope
|
|
this.blockPreWalkStatements(body.body);
|
|
this.walkStatements(body.body);
|
|
} else {
|
|
this.walkStatement(body);
|
|
}
|
|
});
|
|
}
|
|
|
|
preWalkForOfStatement(statement) {
|
|
if (statement.await && this.scope.topLevelScope === true) {
|
|
this.hooks.topLevelAwait.call(statement);
|
|
}
|
|
if (statement.left.type === "VariableDeclaration") {
|
|
this.preWalkVariableDeclaration(statement.left);
|
|
}
|
|
this.preWalkStatement(statement.body);
|
|
}
|
|
|
|
walkForOfStatement(statement) {
|
|
this.inBlockScope(() => {
|
|
if (statement.left.type === "VariableDeclaration") {
|
|
this.blockPreWalkVariableDeclaration(statement.left);
|
|
this.walkVariableDeclaration(statement.left);
|
|
} else {
|
|
this.walkPattern(statement.left);
|
|
}
|
|
this.walkExpression(statement.right);
|
|
const body = statement.body;
|
|
if (body.type === "BlockStatement") {
|
|
// no need to add additional scope
|
|
this.blockPreWalkStatements(body.body);
|
|
this.walkStatements(body.body);
|
|
} else {
|
|
this.walkStatement(body);
|
|
}
|
|
});
|
|
}
|
|
|
|
// Declarations
|
|
preWalkFunctionDeclaration(statement) {
|
|
if (statement.id) {
|
|
this.defineVariable(statement.id.name);
|
|
}
|
|
}
|
|
|
|
walkFunctionDeclaration(statement) {
|
|
const wasTopLevel = this.scope.topLevelScope;
|
|
this.scope.topLevelScope = false;
|
|
this.inFunctionScope(true, statement.params, () => {
|
|
for (const param of statement.params) {
|
|
this.walkPattern(param);
|
|
}
|
|
if (statement.body.type === "BlockStatement") {
|
|
this.detectMode(statement.body.body);
|
|
this.preWalkStatement(statement.body);
|
|
this.walkStatement(statement.body);
|
|
} else {
|
|
this.walkExpression(statement.body);
|
|
}
|
|
});
|
|
this.scope.topLevelScope = wasTopLevel;
|
|
}
|
|
|
|
blockPreWalkImportDeclaration(statement) {
|
|
const source = statement.source.value;
|
|
this.hooks.import.call(statement, source);
|
|
for (const specifier of statement.specifiers) {
|
|
const name = specifier.local.name;
|
|
switch (specifier.type) {
|
|
case "ImportDefaultSpecifier":
|
|
if (
|
|
!this.hooks.importSpecifier.call(statement, source, "default", name)
|
|
) {
|
|
this.defineVariable(name);
|
|
}
|
|
break;
|
|
case "ImportSpecifier":
|
|
if (
|
|
!this.hooks.importSpecifier.call(
|
|
statement,
|
|
source,
|
|
specifier.imported.name,
|
|
name
|
|
)
|
|
) {
|
|
this.defineVariable(name);
|
|
}
|
|
break;
|
|
case "ImportNamespaceSpecifier":
|
|
if (!this.hooks.importSpecifier.call(statement, source, null, name)) {
|
|
this.defineVariable(name);
|
|
}
|
|
break;
|
|
default:
|
|
this.defineVariable(name);
|
|
}
|
|
}
|
|
}
|
|
|
|
enterDeclaration(declaration, onIdent) {
|
|
switch (declaration.type) {
|
|
case "VariableDeclaration":
|
|
for (const declarator of declaration.declarations) {
|
|
switch (declarator.type) {
|
|
case "VariableDeclarator": {
|
|
this.enterPattern(declarator.id, onIdent);
|
|
break;
|
|
}
|
|
}
|
|
}
|
|
break;
|
|
case "FunctionDeclaration":
|
|
this.enterPattern(declaration.id, onIdent);
|
|
break;
|
|
case "ClassDeclaration":
|
|
this.enterPattern(declaration.id, onIdent);
|
|
break;
|
|
}
|
|
}
|
|
|
|
blockPreWalkExportNamedDeclaration(statement) {
|
|
let source;
|
|
if (statement.source) {
|
|
source = statement.source.value;
|
|
this.hooks.exportImport.call(statement, source);
|
|
} else {
|
|
this.hooks.export.call(statement);
|
|
}
|
|
if (statement.declaration) {
|
|
if (
|
|
!this.hooks.exportDeclaration.call(statement, statement.declaration)
|
|
) {
|
|
this.preWalkStatement(statement.declaration);
|
|
this.blockPreWalkStatement(statement.declaration);
|
|
let index = 0;
|
|
this.enterDeclaration(statement.declaration, def => {
|
|
this.hooks.exportSpecifier.call(statement, def, def, index++);
|
|
});
|
|
}
|
|
}
|
|
if (statement.specifiers) {
|
|
for (
|
|
let specifierIndex = 0;
|
|
specifierIndex < statement.specifiers.length;
|
|
specifierIndex++
|
|
) {
|
|
const specifier = statement.specifiers[specifierIndex];
|
|
switch (specifier.type) {
|
|
case "ExportSpecifier": {
|
|
const name = specifier.exported.name;
|
|
if (source) {
|
|
this.hooks.exportImportSpecifier.call(
|
|
statement,
|
|
source,
|
|
specifier.local.name,
|
|
name,
|
|
specifierIndex
|
|
);
|
|
} else {
|
|
this.hooks.exportSpecifier.call(
|
|
statement,
|
|
specifier.local.name,
|
|
name,
|
|
specifierIndex
|
|
);
|
|
}
|
|
break;
|
|
}
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
walkExportNamedDeclaration(statement) {
|
|
if (statement.declaration) {
|
|
this.walkStatement(statement.declaration);
|
|
}
|
|
}
|
|
|
|
blockPreWalkExportDefaultDeclaration(statement) {
|
|
this.preWalkStatement(statement.declaration);
|
|
this.blockPreWalkStatement(statement.declaration);
|
|
if (
|
|
statement.declaration.id &&
|
|
statement.declaration.type !== "FunctionExpression" &&
|
|
statement.declaration.type !== "ClassExpression"
|
|
) {
|
|
this.hooks.exportSpecifier.call(
|
|
statement,
|
|
statement.declaration.id.name,
|
|
"default",
|
|
undefined
|
|
);
|
|
}
|
|
}
|
|
|
|
walkExportDefaultDeclaration(statement) {
|
|
this.hooks.export.call(statement);
|
|
if (
|
|
statement.declaration.id &&
|
|
statement.declaration.type !== "FunctionExpression" &&
|
|
statement.declaration.type !== "ClassExpression"
|
|
) {
|
|
if (
|
|
!this.hooks.exportDeclaration.call(statement, statement.declaration)
|
|
) {
|
|
this.walkStatement(statement.declaration);
|
|
}
|
|
} else {
|
|
// Acorn parses `export default function() {}` as `FunctionDeclaration` and
|
|
// `export default class {}` as `ClassDeclaration`, both with `id = null`.
|
|
// These nodes must be treated as expressions.
|
|
if (
|
|
statement.declaration.type === "FunctionDeclaration" ||
|
|
statement.declaration.type === "ClassDeclaration"
|
|
) {
|
|
this.walkStatement(statement.declaration);
|
|
} else {
|
|
this.walkExpression(statement.declaration);
|
|
}
|
|
if (!this.hooks.exportExpression.call(statement, statement.declaration)) {
|
|
this.hooks.exportSpecifier.call(
|
|
statement,
|
|
statement.declaration,
|
|
"default",
|
|
undefined
|
|
);
|
|
}
|
|
}
|
|
}
|
|
|
|
blockPreWalkExportAllDeclaration(statement) {
|
|
const source = statement.source.value;
|
|
this.hooks.exportImport.call(statement, source);
|
|
this.hooks.exportImportSpecifier.call(statement, source, null, null, 0);
|
|
}
|
|
|
|
preWalkVariableDeclaration(statement) {
|
|
if (statement.kind !== "var") return;
|
|
this._preWalkVariableDeclaration(statement, this.hooks.varDeclarationVar);
|
|
}
|
|
|
|
blockPreWalkVariableDeclaration(statement) {
|
|
if (statement.kind === "var") return;
|
|
const hookMap =
|
|
statement.kind === "const"
|
|
? this.hooks.varDeclarationConst
|
|
: this.hooks.varDeclarationLet;
|
|
this._preWalkVariableDeclaration(statement, hookMap);
|
|
}
|
|
|
|
_preWalkVariableDeclaration(statement, hookMap) {
|
|
for (const declarator of statement.declarations) {
|
|
switch (declarator.type) {
|
|
case "VariableDeclarator": {
|
|
if (!this.hooks.preDeclarator.call(declarator, statement)) {
|
|
this.enterPattern(declarator.id, (name, decl) => {
|
|
let hook = hookMap.get(name);
|
|
if (hook === undefined || !hook.call(decl)) {
|
|
hook = this.hooks.varDeclaration.get(name);
|
|
if (hook === undefined || !hook.call(decl)) {
|
|
this.defineVariable(name);
|
|
}
|
|
}
|
|
});
|
|
}
|
|
break;
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
walkVariableDeclaration(statement) {
|
|
for (const declarator of statement.declarations) {
|
|
switch (declarator.type) {
|
|
case "VariableDeclarator": {
|
|
const renameIdentifier =
|
|
declarator.init && this.getRenameIdentifier(declarator.init);
|
|
if (renameIdentifier && declarator.id.type === "Identifier") {
|
|
const hook = this.hooks.canRename.get(renameIdentifier);
|
|
if (hook !== undefined && hook.call(declarator.init)) {
|
|
// renaming with "var a = b;"
|
|
const hook = this.hooks.rename.get(renameIdentifier);
|
|
if (hook === undefined || !hook.call(declarator.init)) {
|
|
this.setVariable(
|
|
declarator.id.name,
|
|
this.getVariableInfo(renameIdentifier)
|
|
);
|
|
}
|
|
break;
|
|
}
|
|
}
|
|
if (!this.hooks.declarator.call(declarator, statement)) {
|
|
this.walkPattern(declarator.id);
|
|
if (declarator.init) this.walkExpression(declarator.init);
|
|
}
|
|
break;
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
blockPreWalkClassDeclaration(statement) {
|
|
if (statement.id) {
|
|
this.defineVariable(statement.id.name);
|
|
}
|
|
}
|
|
|
|
walkClassDeclaration(statement) {
|
|
this.walkClass(statement);
|
|
}
|
|
|
|
preWalkSwitchCases(switchCases) {
|
|
for (let index = 0, len = switchCases.length; index < len; index++) {
|
|
const switchCase = switchCases[index];
|
|
this.preWalkStatements(switchCase.consequent);
|
|
}
|
|
}
|
|
|
|
walkSwitchCases(switchCases) {
|
|
for (let index = 0, len = switchCases.length; index < len; index++) {
|
|
const switchCase = switchCases[index];
|
|
|
|
if (switchCase.test) {
|
|
this.walkExpression(switchCase.test);
|
|
}
|
|
this.walkStatements(switchCase.consequent);
|
|
}
|
|
}
|
|
|
|
preWalkCatchClause(catchClause) {
|
|
this.preWalkStatement(catchClause.body);
|
|
}
|
|
|
|
walkCatchClause(catchClause) {
|
|
this.inBlockScope(() => {
|
|
// Error binding is optional in catch clause since ECMAScript 2019
|
|
if (catchClause.param !== null) {
|
|
this.enterPattern(catchClause.param, ident => {
|
|
this.defineVariable(ident);
|
|
});
|
|
this.walkPattern(catchClause.param);
|
|
}
|
|
this.blockPreWalkStatement(catchClause.body);
|
|
this.walkStatement(catchClause.body);
|
|
});
|
|
}
|
|
|
|
walkPattern(pattern) {
|
|
switch (pattern.type) {
|
|
case "ArrayPattern":
|
|
this.walkArrayPattern(pattern);
|
|
break;
|
|
case "AssignmentPattern":
|
|
this.walkAssignmentPattern(pattern);
|
|
break;
|
|
case "MemberExpression":
|
|
this.walkMemberExpression(pattern);
|
|
break;
|
|
case "ObjectPattern":
|
|
this.walkObjectPattern(pattern);
|
|
break;
|
|
case "RestElement":
|
|
this.walkRestElement(pattern);
|
|
break;
|
|
}
|
|
}
|
|
|
|
walkAssignmentPattern(pattern) {
|
|
this.walkExpression(pattern.right);
|
|
this.walkPattern(pattern.left);
|
|
}
|
|
|
|
walkObjectPattern(pattern) {
|
|
for (let i = 0, len = pattern.properties.length; i < len; i++) {
|
|
const prop = pattern.properties[i];
|
|
if (prop) {
|
|
if (prop.computed) this.walkExpression(prop.key);
|
|
if (prop.value) this.walkPattern(prop.value);
|
|
}
|
|
}
|
|
}
|
|
|
|
walkArrayPattern(pattern) {
|
|
for (let i = 0, len = pattern.elements.length; i < len; i++) {
|
|
const element = pattern.elements[i];
|
|
if (element) this.walkPattern(element);
|
|
}
|
|
}
|
|
|
|
walkRestElement(pattern) {
|
|
this.walkPattern(pattern.argument);
|
|
}
|
|
|
|
walkExpressions(expressions) {
|
|
for (const expression of expressions) {
|
|
if (expression) {
|
|
this.walkExpression(expression);
|
|
}
|
|
}
|
|
}
|
|
|
|
walkExpression(expression) {
|
|
switch (expression.type) {
|
|
case "ArrayExpression":
|
|
this.walkArrayExpression(expression);
|
|
break;
|
|
case "ArrowFunctionExpression":
|
|
this.walkArrowFunctionExpression(expression);
|
|
break;
|
|
case "AssignmentExpression":
|
|
this.walkAssignmentExpression(expression);
|
|
break;
|
|
case "AwaitExpression":
|
|
this.walkAwaitExpression(expression);
|
|
break;
|
|
case "BinaryExpression":
|
|
this.walkBinaryExpression(expression);
|
|
break;
|
|
case "CallExpression":
|
|
this.walkCallExpression(expression);
|
|
break;
|
|
case "ClassExpression":
|
|
this.walkClassExpression(expression);
|
|
break;
|
|
case "ConditionalExpression":
|
|
this.walkConditionalExpression(expression);
|
|
break;
|
|
case "FunctionExpression":
|
|
this.walkFunctionExpression(expression);
|
|
break;
|
|
case "Identifier":
|
|
this.walkIdentifier(expression);
|
|
break;
|
|
case "ImportExpression":
|
|
this.walkImportExpression(expression);
|
|
break;
|
|
case "LogicalExpression":
|
|
this.walkLogicalExpression(expression);
|
|
break;
|
|
case "MemberExpression":
|
|
this.walkMemberExpression(expression);
|
|
break;
|
|
case "NewExpression":
|
|
this.walkNewExpression(expression);
|
|
break;
|
|
case "ObjectExpression":
|
|
this.walkObjectExpression(expression);
|
|
break;
|
|
case "SequenceExpression":
|
|
this.walkSequenceExpression(expression);
|
|
break;
|
|
case "SpreadElement":
|
|
this.walkSpreadElement(expression);
|
|
break;
|
|
case "TaggedTemplateExpression":
|
|
this.walkTaggedTemplateExpression(expression);
|
|
break;
|
|
case "TemplateLiteral":
|
|
this.walkTemplateLiteral(expression);
|
|
break;
|
|
case "ThisExpression":
|
|
this.walkThisExpression(expression);
|
|
break;
|
|
case "UnaryExpression":
|
|
this.walkUnaryExpression(expression);
|
|
break;
|
|
case "UpdateExpression":
|
|
this.walkUpdateExpression(expression);
|
|
break;
|
|
case "YieldExpression":
|
|
this.walkYieldExpression(expression);
|
|
break;
|
|
}
|
|
}
|
|
|
|
walkAwaitExpression(expression) {
|
|
if (this.scope.topLevelScope === true)
|
|
this.hooks.topLevelAwait.call(expression);
|
|
this.walkExpression(expression.argument);
|
|
}
|
|
|
|
walkArrayExpression(expression) {
|
|
if (expression.elements) {
|
|
this.walkExpressions(expression.elements);
|
|
}
|
|
}
|
|
|
|
walkSpreadElement(expression) {
|
|
if (expression.argument) {
|
|
this.walkExpression(expression.argument);
|
|
}
|
|
}
|
|
|
|
walkObjectExpression(expression) {
|
|
for (
|
|
let propIndex = 0, len = expression.properties.length;
|
|
propIndex < len;
|
|
propIndex++
|
|
) {
|
|
const prop = expression.properties[propIndex];
|
|
if (prop.type === "SpreadElement") {
|
|
this.walkExpression(prop.argument);
|
|
continue;
|
|
}
|
|
if (prop.computed) {
|
|
this.walkExpression(prop.key);
|
|
}
|
|
if (prop.shorthand && prop.value && prop.value.type === "Identifier") {
|
|
this.scope.inShorthand = prop.value.name;
|
|
this.walkIdentifier(prop.value);
|
|
this.scope.inShorthand = false;
|
|
} else {
|
|
this.walkExpression(prop.value);
|
|
}
|
|
}
|
|
}
|
|
|
|
walkFunctionExpression(expression) {
|
|
const wasTopLevel = this.scope.topLevelScope;
|
|
this.scope.topLevelScope = false;
|
|
const scopeParams = expression.params;
|
|
|
|
// Add function name in scope for recursive calls
|
|
if (expression.id) {
|
|
scopeParams.push(expression.id.name);
|
|
}
|
|
|
|
this.inFunctionScope(true, scopeParams, () => {
|
|
for (const param of expression.params) {
|
|
this.walkPattern(param);
|
|
}
|
|
if (expression.body.type === "BlockStatement") {
|
|
this.detectMode(expression.body.body);
|
|
this.preWalkStatement(expression.body);
|
|
this.walkStatement(expression.body);
|
|
} else {
|
|
this.walkExpression(expression.body);
|
|
}
|
|
});
|
|
this.scope.topLevelScope = wasTopLevel;
|
|
}
|
|
|
|
walkArrowFunctionExpression(expression) {
|
|
const wasTopLevel = this.scope.topLevelScope;
|
|
this.scope.topLevelScope = wasTopLevel ? "arrow" : false;
|
|
this.inFunctionScope(false, expression.params, () => {
|
|
for (const param of expression.params) {
|
|
this.walkPattern(param);
|
|
}
|
|
if (expression.body.type === "BlockStatement") {
|
|
this.detectMode(expression.body.body);
|
|
this.preWalkStatement(expression.body);
|
|
this.walkStatement(expression.body);
|
|
} else {
|
|
this.walkExpression(expression.body);
|
|
}
|
|
});
|
|
this.scope.topLevelScope = wasTopLevel;
|
|
}
|
|
|
|
walkSequenceExpression(expression) {
|
|
if (expression.expressions) this.walkExpressions(expression.expressions);
|
|
}
|
|
|
|
walkUpdateExpression(expression) {
|
|
this.walkExpression(expression.argument);
|
|
}
|
|
|
|
walkUnaryExpression(expression) {
|
|
if (expression.operator === "typeof") {
|
|
const result = this.callHooksForExpression(
|
|
this.hooks.typeof,
|
|
expression.argument,
|
|
expression
|
|
);
|
|
if (result === true) return;
|
|
}
|
|
this.walkExpression(expression.argument);
|
|
}
|
|
|
|
walkLeftRightExpression(expression) {
|
|
this.walkExpression(expression.left);
|
|
this.walkExpression(expression.right);
|
|
}
|
|
|
|
walkBinaryExpression(expression) {
|
|
this.walkLeftRightExpression(expression);
|
|
}
|
|
|
|
walkLogicalExpression(expression) {
|
|
const result = this.hooks.expressionLogicalOperator.call(expression);
|
|
if (result === undefined) {
|
|
this.walkLeftRightExpression(expression);
|
|
} else {
|
|
if (result) {
|
|
this.walkExpression(expression.right);
|
|
}
|
|
}
|
|
}
|
|
|
|
walkAssignmentExpression(expression) {
|
|
if (expression.left.type === "Identifier") {
|
|
const renameIdentifier = this.getRenameIdentifier(expression.right);
|
|
if (renameIdentifier) {
|
|
if (
|
|
this.callHooksForInfo(
|
|
this.hooks.canRename,
|
|
renameIdentifier,
|
|
expression.right
|
|
)
|
|
) {
|
|
// renaming "a = b;"
|
|
if (
|
|
!this.callHooksForInfo(
|
|
this.hooks.rename,
|
|
renameIdentifier,
|
|
expression.right
|
|
)
|
|
) {
|
|
this.setVariable(
|
|
expression.left.name,
|
|
this.getVariableInfo(renameIdentifier)
|
|
);
|
|
}
|
|
return;
|
|
}
|
|
}
|
|
this.walkExpression(expression.right);
|
|
this.enterPattern(expression.left, (name, decl) => {
|
|
if (!this.callHooksForName(this.hooks.assign, name, expression)) {
|
|
this.walkExpression(expression.left);
|
|
}
|
|
});
|
|
return;
|
|
}
|
|
this.walkExpression(expression.right);
|
|
if (expression.left.type.endsWith("Pattern")) {
|
|
this.enterPattern(expression.left, (name, decl) => {
|
|
if (!this.callHooksForName(this.hooks.assign, name, expression)) {
|
|
this.defineVariable(name);
|
|
}
|
|
});
|
|
this.walkPattern(expression.left);
|
|
} else if (expression.left.type === "MemberExpression") {
|
|
const exprName = this.getMemberExpressionInfo(expression.left, [
|
|
"expression"
|
|
]);
|
|
if (exprName) {
|
|
if (
|
|
this.callHooksForInfo(
|
|
this.hooks.assignMemberChain,
|
|
exprName.rootInfo,
|
|
expression,
|
|
exprName.getMembers()
|
|
)
|
|
) {
|
|
return;
|
|
}
|
|
}
|
|
this.walkExpression(expression.left);
|
|
} else {
|
|
this.walkExpression(expression.left);
|
|
}
|
|
}
|
|
|
|
walkConditionalExpression(expression) {
|
|
const result = this.hooks.expressionConditionalOperator.call(expression);
|
|
if (result === undefined) {
|
|
this.walkExpression(expression.test);
|
|
this.walkExpression(expression.consequent);
|
|
if (expression.alternate) {
|
|
this.walkExpression(expression.alternate);
|
|
}
|
|
} else {
|
|
if (result) {
|
|
this.walkExpression(expression.consequent);
|
|
} else if (expression.alternate) {
|
|
this.walkExpression(expression.alternate);
|
|
}
|
|
}
|
|
}
|
|
|
|
walkNewExpression(expression) {
|
|
const result = this.callHooksForExpression(
|
|
this.hooks.new,
|
|
expression.callee,
|
|
expression
|
|
);
|
|
if (result === true) return;
|
|
this.walkExpression(expression.callee);
|
|
if (expression.arguments) {
|
|
this.walkExpressions(expression.arguments);
|
|
}
|
|
}
|
|
|
|
walkYieldExpression(expression) {
|
|
if (expression.argument) {
|
|
this.walkExpression(expression.argument);
|
|
}
|
|
}
|
|
|
|
walkTemplateLiteral(expression) {
|
|
if (expression.expressions) {
|
|
this.walkExpressions(expression.expressions);
|
|
}
|
|
}
|
|
|
|
walkTaggedTemplateExpression(expression) {
|
|
if (expression.tag) {
|
|
this.walkExpression(expression.tag);
|
|
}
|
|
if (expression.quasi && expression.quasi.expressions) {
|
|
this.walkExpressions(expression.quasi.expressions);
|
|
}
|
|
}
|
|
|
|
walkClassExpression(expression) {
|
|
this.walkClass(expression);
|
|
}
|
|
|
|
_walkIIFE(functionExpression, options, currentThis) {
|
|
const getVarInfo = argOrThis => {
|
|
const renameIdentifier = this.getRenameIdentifier(argOrThis);
|
|
if (renameIdentifier) {
|
|
if (
|
|
this.callHooksForInfo(
|
|
this.hooks.canRename,
|
|
renameIdentifier,
|
|
argOrThis
|
|
)
|
|
) {
|
|
if (
|
|
!this.callHooksForInfo(
|
|
this.hooks.rename,
|
|
renameIdentifier,
|
|
argOrThis
|
|
)
|
|
) {
|
|
return this.getVariableInfo(renameIdentifier);
|
|
}
|
|
}
|
|
}
|
|
this.walkExpression(argOrThis);
|
|
};
|
|
const { params } = functionExpression;
|
|
const renameThis = currentThis ? getVarInfo(currentThis) : null;
|
|
const varInfoForArgs = options.map(getVarInfo);
|
|
const wasTopLevel = this.scope.topLevelScope;
|
|
this.scope.topLevelScope = false;
|
|
const scopeParams = params.filter(
|
|
(identifier, idx) => !varInfoForArgs[idx]
|
|
);
|
|
|
|
// Add function name in scope for recursive calls
|
|
if (functionExpression.id) {
|
|
scopeParams.push(functionExpression.id.name);
|
|
}
|
|
|
|
this.inFunctionScope(true, scopeParams, () => {
|
|
if (renameThis) {
|
|
this.setVariable("this", renameThis);
|
|
}
|
|
for (let i = 0; i < varInfoForArgs.length; i++) {
|
|
const varInfo = varInfoForArgs[i];
|
|
if (!varInfo) continue;
|
|
if (!params[i] || params[i].type !== "Identifier") continue;
|
|
this.setVariable(params[i].name, varInfo);
|
|
}
|
|
if (functionExpression.body.type === "BlockStatement") {
|
|
this.detectMode(functionExpression.body.body);
|
|
this.preWalkStatement(functionExpression.body);
|
|
this.walkStatement(functionExpression.body);
|
|
} else {
|
|
this.walkExpression(functionExpression.body);
|
|
}
|
|
});
|
|
this.scope.topLevelScope = wasTopLevel;
|
|
}
|
|
|
|
walkImportExpression(expression) {
|
|
let result = this.hooks.importCall.call(expression);
|
|
if (result === true) return;
|
|
|
|
this.walkExpression(expression.source);
|
|
}
|
|
|
|
walkCallExpression(expression) {
|
|
if (
|
|
expression.callee.type === "MemberExpression" &&
|
|
expression.callee.object.type === "FunctionExpression" &&
|
|
!expression.callee.computed &&
|
|
(expression.callee.property.name === "call" ||
|
|
expression.callee.property.name === "bind") &&
|
|
expression.arguments.length > 0
|
|
) {
|
|
// (function(…) { }.call/bind(?, …))
|
|
this._walkIIFE(
|
|
expression.callee.object,
|
|
expression.arguments.slice(1),
|
|
expression.arguments[0]
|
|
);
|
|
} else if (expression.callee.type === "FunctionExpression") {
|
|
// (function(…) { }(…))
|
|
this._walkIIFE(expression.callee, expression.arguments, null);
|
|
} else {
|
|
if (expression.callee.type === "MemberExpression") {
|
|
const exprInfo = this.getMemberExpressionInfo(expression.callee, [
|
|
"call"
|
|
]);
|
|
if (exprInfo && exprInfo.type === "call") {
|
|
const result = this.callHooksForInfo(
|
|
this.hooks.callMemberChainOfCallMemberChain,
|
|
exprInfo.rootInfo,
|
|
expression,
|
|
exprInfo.getCalleeMembers(),
|
|
exprInfo.call,
|
|
exprInfo.getMembers()
|
|
);
|
|
if (result === true) return;
|
|
}
|
|
}
|
|
const callee = this.evaluateExpression(expression.callee);
|
|
if (callee.isIdentifier()) {
|
|
const result1 = this.callHooksForInfo(
|
|
this.hooks.callMemberChain,
|
|
callee.rootInfo,
|
|
expression,
|
|
callee.getMembers()
|
|
);
|
|
if (result1 === true) return;
|
|
const result2 = this.callHooksForInfo(
|
|
this.hooks.call,
|
|
callee.identifier,
|
|
expression
|
|
);
|
|
if (result2 === true) return;
|
|
}
|
|
|
|
if (expression.callee) {
|
|
if (expression.callee.type === "MemberExpression") {
|
|
// because of call context we need to walk the call context as expression
|
|
this.walkExpression(expression.callee.object);
|
|
if (expression.callee.computed === true)
|
|
this.walkExpression(expression.callee.property);
|
|
} else {
|
|
this.walkExpression(expression.callee);
|
|
}
|
|
}
|
|
if (expression.arguments) this.walkExpressions(expression.arguments);
|
|
}
|
|
}
|
|
|
|
walkMemberExpression(expression) {
|
|
const exprInfo = this.getMemberExpressionInfo(expression, [
|
|
"call",
|
|
"expression"
|
|
]);
|
|
if (exprInfo) {
|
|
switch (exprInfo.type) {
|
|
case "expression": {
|
|
const members = exprInfo.getMembers();
|
|
const result = this.callHooksForInfo(
|
|
this.hooks.expressionMemberChain,
|
|
exprInfo.rootInfo,
|
|
expression,
|
|
members
|
|
);
|
|
if (result === true) return;
|
|
this.walkMemberExpressionWithExpressionName(
|
|
expression,
|
|
exprInfo.name,
|
|
exprInfo.rootInfo,
|
|
members
|
|
);
|
|
return;
|
|
}
|
|
case "call": {
|
|
const result = this.callHooksForInfo(
|
|
this.hooks.memberChainOfCallMemberChain,
|
|
exprInfo.rootInfo,
|
|
expression,
|
|
exprInfo.getCalleeMembers(),
|
|
exprInfo.call,
|
|
exprInfo.getMembers()
|
|
);
|
|
if (result === true) return;
|
|
// Fast skip over the member chain as we already called memberChainOfCallMemberChain
|
|
// and call computed property are literals anyway
|
|
this.walkExpression(exprInfo.call);
|
|
return;
|
|
}
|
|
}
|
|
}
|
|
this.walkExpression(expression.object);
|
|
if (expression.computed === true) this.walkExpression(expression.property);
|
|
}
|
|
|
|
walkMemberExpressionWithExpressionName(expression, name, rootInfo, members) {
|
|
const result = this.callHooksForInfo(
|
|
this.hooks.expression,
|
|
name,
|
|
expression
|
|
);
|
|
if (result === true) return;
|
|
if (expression.object.type === "MemberExpression") {
|
|
// optimize the case where expression.object is a MemberExpression too.
|
|
// we can keep info here when calling walkMemberExpression directly
|
|
const property =
|
|
expression.property.name || `${expression.property.value}`;
|
|
name = name.slice(0, -property.length - 1);
|
|
members.pop();
|
|
this.walkMemberExpressionWithExpressionName(
|
|
expression.object,
|
|
name,
|
|
rootInfo,
|
|
members
|
|
);
|
|
} else {
|
|
this.walkExpression(expression.object);
|
|
}
|
|
if (expression.computed === true) this.walkExpression(expression.property);
|
|
}
|
|
|
|
walkThisExpression(expression) {
|
|
this.callHooksForName(this.hooks.expression, "this", expression);
|
|
}
|
|
|
|
walkIdentifier(expression) {
|
|
this.callHooksForName(this.hooks.expression, expression.name, expression);
|
|
}
|
|
|
|
callHooksForExpression(hookMap, expr, ...args) {
|
|
const exprName = this.getMemberExpressionInfo(expr, ["expression"]);
|
|
if (exprName !== undefined) {
|
|
return this.callHooksForInfoWithFallback(
|
|
hookMap,
|
|
exprName.name,
|
|
undefined,
|
|
undefined,
|
|
...args
|
|
);
|
|
}
|
|
}
|
|
|
|
/**
|
|
* @template T
|
|
* @template R
|
|
* @param {HookMap<SyncBailHook<T, R>>} hookMap hooks the should be called
|
|
* @param {MemberExpressionNode} expr expression info
|
|
* @param {function(string, string | ScopeInfo | VariableInfo, function(): string[]): any} fallback callback when variable in not handled by hooks
|
|
* @param {function(string): any} defined callback when variable is defined
|
|
* @param {AsArray<T>} args args for the hook
|
|
* @returns {R} result of hook
|
|
*/
|
|
callHooksForExpressionWithFallback(
|
|
hookMap,
|
|
expr,
|
|
fallback,
|
|
defined,
|
|
...args
|
|
) {
|
|
const exprName = this.getMemberExpressionInfo(expr, ["expression"]);
|
|
if (exprName !== undefined) {
|
|
return this.callHooksForInfoWithFallback(
|
|
hookMap,
|
|
exprName.name,
|
|
fallback &&
|
|
(name => fallback(name, exprName.rootInfo, exprName.getMembers)),
|
|
defined && (() => defined(exprName.name)),
|
|
...args
|
|
);
|
|
}
|
|
}
|
|
|
|
/**
|
|
* @template T
|
|
* @template R
|
|
* @param {HookMap<SyncBailHook<T, R>>} hookMap hooks the should be called
|
|
* @param {string} name key in map
|
|
* @param {AsArray<T>} args args for the hook
|
|
* @returns {R} result of hook
|
|
*/
|
|
callHooksForName(hookMap, name, ...args) {
|
|
return this.callHooksForNameWithFallback(
|
|
hookMap,
|
|
name,
|
|
undefined,
|
|
undefined,
|
|
...args
|
|
);
|
|
}
|
|
|
|
/**
|
|
* @template T
|
|
* @template R
|
|
* @param {HookMap<SyncBailHook<T, R>>} hookMap hooks that should be called
|
|
* @param {ExportedVariableInfo} info variable info
|
|
* @param {AsArray<T>} args args for the hook
|
|
* @returns {R} result of hook
|
|
*/
|
|
callHooksForInfo(hookMap, info, ...args) {
|
|
return this.callHooksForInfoWithFallback(
|
|
hookMap,
|
|
info,
|
|
undefined,
|
|
undefined,
|
|
...args
|
|
);
|
|
}
|
|
|
|
/**
|
|
* @template T
|
|
* @template R
|
|
* @param {HookMap<SyncBailHook<T, R>>} hookMap hooks the should be called
|
|
* @param {ExportedVariableInfo} info variable info
|
|
* @param {function(string): any} fallback callback when variable in not handled by hooks
|
|
* @param {function(): any} defined callback when variable is defined
|
|
* @param {AsArray<T>} args args for the hook
|
|
* @returns {R} result of hook
|
|
*/
|
|
callHooksForInfoWithFallback(hookMap, info, fallback, defined, ...args) {
|
|
let name;
|
|
if (typeof info === "string") {
|
|
name = info;
|
|
} else {
|
|
if (!(info instanceof VariableInfo)) {
|
|
if (defined !== undefined) {
|
|
return defined();
|
|
}
|
|
return;
|
|
}
|
|
let tagInfo = info.tagInfo;
|
|
while (tagInfo !== undefined) {
|
|
const hook = hookMap.get(tagInfo.tag);
|
|
if (hook !== undefined) {
|
|
this.currentTagData = tagInfo.data;
|
|
const result = hook.call(...args);
|
|
this.currentTagData = undefined;
|
|
if (result !== undefined) return result;
|
|
}
|
|
tagInfo = tagInfo.next;
|
|
}
|
|
if (info.freeName === true) {
|
|
if (defined !== undefined) {
|
|
return defined();
|
|
}
|
|
return;
|
|
}
|
|
name = info.freeName;
|
|
}
|
|
const hook = hookMap.get(name);
|
|
if (hook !== undefined) {
|
|
const result = hook.call(...args);
|
|
if (result !== undefined) return result;
|
|
}
|
|
if (fallback !== undefined) {
|
|
return fallback(name);
|
|
}
|
|
}
|
|
|
|
/**
|
|
* @template T
|
|
* @template R
|
|
* @param {HookMap<SyncBailHook<T, R>>} hookMap hooks the should be called
|
|
* @param {string} name key in map
|
|
* @param {function(string): any} fallback callback when variable in not handled by hooks
|
|
* @param {function(): any} defined callback when variable is defined
|
|
* @param {AsArray<T>} args args for the hook
|
|
* @returns {R} result of hook
|
|
*/
|
|
callHooksForNameWithFallback(hookMap, name, fallback, defined, ...args) {
|
|
return this.callHooksForInfoWithFallback(
|
|
hookMap,
|
|
this.getVariableInfo(name),
|
|
fallback,
|
|
defined,
|
|
...args
|
|
);
|
|
}
|
|
|
|
/**
|
|
* @deprecated
|
|
* @param {any} params scope params
|
|
* @param {function(): void} fn inner function
|
|
* @returns {void}
|
|
*/
|
|
inScope(params, fn) {
|
|
const oldScope = this.scope;
|
|
this.scope = {
|
|
topLevelScope: oldScope.topLevelScope,
|
|
inTry: false,
|
|
inShorthand: false,
|
|
isStrict: oldScope.isStrict,
|
|
isAsmJs: oldScope.isAsmJs,
|
|
definitions: oldScope.definitions.createChild()
|
|
};
|
|
|
|
this.undefineVariable("this");
|
|
|
|
this.enterPatterns(params, (ident, pattern) => {
|
|
this.defineVariable(ident);
|
|
});
|
|
|
|
fn();
|
|
|
|
this.scope = oldScope;
|
|
}
|
|
|
|
inFunctionScope(hasThis, params, fn) {
|
|
const oldScope = this.scope;
|
|
this.scope = {
|
|
topLevelScope: oldScope.topLevelScope,
|
|
inTry: false,
|
|
inShorthand: false,
|
|
isStrict: oldScope.isStrict,
|
|
isAsmJs: oldScope.isAsmJs,
|
|
definitions: oldScope.definitions.createChild()
|
|
};
|
|
|
|
if (hasThis) {
|
|
this.undefineVariable("this");
|
|
}
|
|
|
|
this.enterPatterns(params, (ident, pattern) => {
|
|
this.defineVariable(ident);
|
|
});
|
|
|
|
fn();
|
|
|
|
this.scope = oldScope;
|
|
}
|
|
|
|
inBlockScope(fn) {
|
|
const oldScope = this.scope;
|
|
this.scope = {
|
|
topLevelScope: oldScope.topLevelScope,
|
|
inTry: oldScope.inTry,
|
|
inShorthand: false,
|
|
isStrict: oldScope.isStrict,
|
|
isAsmJs: oldScope.isAsmJs,
|
|
definitions: oldScope.definitions.createChild()
|
|
};
|
|
|
|
fn();
|
|
|
|
this.scope = oldScope;
|
|
}
|
|
|
|
detectMode(statements) {
|
|
const isLiteral =
|
|
statements.length >= 1 &&
|
|
statements[0].type === "ExpressionStatement" &&
|
|
statements[0].expression.type === "Literal";
|
|
if (isLiteral && statements[0].expression.value === "use strict") {
|
|
this.scope.isStrict = true;
|
|
}
|
|
if (isLiteral && statements[0].expression.value === "use asm") {
|
|
this.scope.isAsmJs = true;
|
|
}
|
|
}
|
|
|
|
enterPatterns(patterns, onIdent) {
|
|
for (const pattern of patterns) {
|
|
if (typeof pattern !== "string") {
|
|
this.enterPattern(pattern, onIdent);
|
|
} else if (pattern) {
|
|
onIdent(pattern);
|
|
}
|
|
}
|
|
}
|
|
|
|
enterPattern(pattern, onIdent) {
|
|
if (!pattern) return;
|
|
switch (pattern.type) {
|
|
case "ArrayPattern":
|
|
this.enterArrayPattern(pattern, onIdent);
|
|
break;
|
|
case "AssignmentPattern":
|
|
this.enterAssignmentPattern(pattern, onIdent);
|
|
break;
|
|
case "Identifier":
|
|
this.enterIdentifier(pattern, onIdent);
|
|
break;
|
|
case "ObjectPattern":
|
|
this.enterObjectPattern(pattern, onIdent);
|
|
break;
|
|
case "RestElement":
|
|
this.enterRestElement(pattern, onIdent);
|
|
break;
|
|
case "Property":
|
|
if (pattern.shorthand && pattern.value.type === "Identifier") {
|
|
this.scope.inShorthand = pattern.value.name;
|
|
this.enterIdentifier(pattern.value, onIdent);
|
|
this.scope.inShorthand = false;
|
|
} else {
|
|
this.enterPattern(pattern.value, onIdent);
|
|
}
|
|
break;
|
|
}
|
|
}
|
|
|
|
enterIdentifier(pattern, onIdent) {
|
|
if (!this.callHooksForName(this.hooks.pattern, pattern.name, pattern)) {
|
|
onIdent(pattern.name, pattern);
|
|
}
|
|
}
|
|
|
|
enterObjectPattern(pattern, onIdent) {
|
|
for (
|
|
let propIndex = 0, len = pattern.properties.length;
|
|
propIndex < len;
|
|
propIndex++
|
|
) {
|
|
const prop = pattern.properties[propIndex];
|
|
this.enterPattern(prop, onIdent);
|
|
}
|
|
}
|
|
|
|
enterArrayPattern(pattern, onIdent) {
|
|
for (
|
|
let elementIndex = 0, len = pattern.elements.length;
|
|
elementIndex < len;
|
|
elementIndex++
|
|
) {
|
|
const element = pattern.elements[elementIndex];
|
|
this.enterPattern(element, onIdent);
|
|
}
|
|
}
|
|
|
|
enterRestElement(pattern, onIdent) {
|
|
this.enterPattern(pattern.argument, onIdent);
|
|
}
|
|
|
|
enterAssignmentPattern(pattern, onIdent) {
|
|
this.enterPattern(pattern.left, onIdent);
|
|
}
|
|
|
|
/**
|
|
* @param {ExpressionNode} expression expression node
|
|
* @returns {BasicEvaluatedExpression | undefined} evaluation result
|
|
*/
|
|
evaluateExpression(expression) {
|
|
try {
|
|
const hook = this.hooks.evaluate.get(expression.type);
|
|
if (hook !== undefined) {
|
|
const result = hook.call(expression);
|
|
if (result !== undefined) {
|
|
if (result) {
|
|
result.setExpression(expression);
|
|
}
|
|
return result;
|
|
}
|
|
}
|
|
} catch (e) {
|
|
console.warn(e);
|
|
// ignore error
|
|
}
|
|
return new BasicEvaluatedExpression()
|
|
.setRange(expression.range)
|
|
.setExpression(expression);
|
|
}
|
|
|
|
parseString(expression) {
|
|
switch (expression.type) {
|
|
case "BinaryExpression":
|
|
if (expression.operator === "+") {
|
|
return (
|
|
this.parseString(expression.left) +
|
|
this.parseString(expression.right)
|
|
);
|
|
}
|
|
break;
|
|
case "Literal":
|
|
return expression.value + "";
|
|
}
|
|
throw new Error(
|
|
expression.type + " is not supported as parameter for require"
|
|
);
|
|
}
|
|
|
|
parseCalculatedString(expression) {
|
|
switch (expression.type) {
|
|
case "BinaryExpression":
|
|
if (expression.operator === "+") {
|
|
const left = this.parseCalculatedString(expression.left);
|
|
const right = this.parseCalculatedString(expression.right);
|
|
if (left.code) {
|
|
return {
|
|
range: left.range,
|
|
value: left.value,
|
|
code: true,
|
|
conditional: false
|
|
};
|
|
} else if (right.code) {
|
|
return {
|
|
range: [
|
|
left.range[0],
|
|
right.range ? right.range[1] : left.range[1]
|
|
],
|
|
value: left.value + right.value,
|
|
code: true,
|
|
conditional: false
|
|
};
|
|
} else {
|
|
return {
|
|
range: [left.range[0], right.range[1]],
|
|
value: left.value + right.value,
|
|
code: false,
|
|
conditional: false
|
|
};
|
|
}
|
|
}
|
|
break;
|
|
case "ConditionalExpression": {
|
|
const consequent = this.parseCalculatedString(expression.consequent);
|
|
const alternate = this.parseCalculatedString(expression.alternate);
|
|
const items = [];
|
|
if (consequent.conditional) {
|
|
items.push(...consequent.conditional);
|
|
} else if (!consequent.code) {
|
|
items.push(consequent);
|
|
} else {
|
|
break;
|
|
}
|
|
if (alternate.conditional) {
|
|
items.push(...alternate.conditional);
|
|
} else if (!alternate.code) {
|
|
items.push(alternate);
|
|
} else {
|
|
break;
|
|
}
|
|
return {
|
|
range: undefined,
|
|
value: "",
|
|
code: true,
|
|
conditional: items
|
|
};
|
|
}
|
|
case "Literal":
|
|
return {
|
|
range: expression.range,
|
|
value: expression.value + "",
|
|
code: false,
|
|
conditional: false
|
|
};
|
|
}
|
|
return {
|
|
range: undefined,
|
|
value: "",
|
|
code: true,
|
|
conditional: false
|
|
};
|
|
}
|
|
|
|
/**
|
|
* @param {string | Buffer | PreparsedAst} source the source to parse
|
|
* @param {ParserState} state the parser state
|
|
* @returns {ParserState} the parser state
|
|
*/
|
|
parse(source, state) {
|
|
let ast;
|
|
let comments;
|
|
const semicolons = new Set();
|
|
if (source === null) {
|
|
throw new Error("source must not be null");
|
|
}
|
|
if (Buffer.isBuffer(source)) {
|
|
source = source.toString("utf-8");
|
|
}
|
|
if (typeof source === "object") {
|
|
ast = /** @type {ProgramNode} */ (source);
|
|
comments = source.comments;
|
|
} else {
|
|
comments = [];
|
|
ast = JavascriptParser.parse(source, {
|
|
sourceType: this.sourceType,
|
|
onComment: comments,
|
|
onInsertedSemicolon: pos => semicolons.add(pos)
|
|
});
|
|
}
|
|
|
|
const oldScope = this.scope;
|
|
const oldState = this.state;
|
|
const oldComments = this.comments;
|
|
const oldSemicolons = this.semicolons;
|
|
const oldStatementEndPos = this.statementEndPos;
|
|
const oldLastStatementEndPos = this.lastStatementEndPos;
|
|
const oldStatementStartPos = this.statementStartPos;
|
|
this.scope = {
|
|
topLevelScope: true,
|
|
inTry: false,
|
|
inShorthand: false,
|
|
isStrict: false,
|
|
isAsmJs: false,
|
|
definitions: new StackedMap()
|
|
};
|
|
/** @type {ParserState} */
|
|
this.state = state;
|
|
this.comments = comments;
|
|
this.semicolons = semicolons;
|
|
this.statementEndPos = NaN;
|
|
this.lastStatementEndPos = NaN;
|
|
this.statementStartPos = NaN;
|
|
if (this.hooks.program.call(ast, comments) === undefined) {
|
|
this.detectMode(ast.body);
|
|
this.preWalkStatements(ast.body);
|
|
this.blockPreWalkStatements(ast.body);
|
|
this.walkStatements(ast.body);
|
|
}
|
|
this.hooks.finish.call(ast, comments);
|
|
this.scope = oldScope;
|
|
/** @type {ParserState} */
|
|
this.state = oldState;
|
|
this.comments = oldComments;
|
|
this.semicolons = oldSemicolons;
|
|
this.statementEndPos = oldStatementEndPos;
|
|
this.lastStatementEndPos = oldLastStatementEndPos;
|
|
this.statementStartPos = oldStatementStartPos;
|
|
return state;
|
|
}
|
|
|
|
evaluate(source) {
|
|
const ast = JavascriptParser.parse("(" + source + ")", {
|
|
sourceType: this.sourceType,
|
|
locations: false
|
|
});
|
|
if (ast.body.length !== 1 || ast.body[0].type !== "ExpressionStatement") {
|
|
throw new Error("evaluate: Source is not a expression");
|
|
}
|
|
return this.evaluateExpression(ast.body[0].expression);
|
|
}
|
|
|
|
getComments(range) {
|
|
return this.comments.filter(
|
|
comment => comment.range[0] >= range[0] && comment.range[1] <= range[1]
|
|
);
|
|
}
|
|
|
|
isAsiPosition(pos) {
|
|
return (
|
|
this.statementStartPos === pos &&
|
|
this.semicolons.has(this.lastStatementEndPos)
|
|
);
|
|
}
|
|
|
|
getTagData(name, tag) {
|
|
const info = this.scope.definitions.get(name);
|
|
if (info instanceof VariableInfo) {
|
|
let tagInfo = info.tagInfo;
|
|
while (tagInfo !== undefined) {
|
|
if (tagInfo.tag === tag) return tagInfo.data;
|
|
tagInfo = tagInfo.next;
|
|
}
|
|
}
|
|
}
|
|
|
|
tagVariable(name, tag, data) {
|
|
const oldInfo = this.scope.definitions.get(name);
|
|
/** @type {VariableInfo} */
|
|
let newInfo;
|
|
if (oldInfo === undefined) {
|
|
newInfo = new VariableInfo(this.scope, name, {
|
|
tag,
|
|
data,
|
|
next: undefined
|
|
});
|
|
} else if (oldInfo instanceof VariableInfo) {
|
|
newInfo = new VariableInfo(oldInfo.declaredScope, oldInfo.freeName, {
|
|
tag,
|
|
data,
|
|
next: oldInfo.tagInfo
|
|
});
|
|
} else {
|
|
newInfo = new VariableInfo(oldInfo, true, {
|
|
tag,
|
|
data,
|
|
next: undefined
|
|
});
|
|
}
|
|
this.scope.definitions.set(name, newInfo);
|
|
}
|
|
|
|
defineVariable(name) {
|
|
const oldInfo = this.scope.definitions.get(name);
|
|
// Don't redefine variable in same scope to keep existing tags
|
|
if (oldInfo instanceof VariableInfo && oldInfo.declaredScope === this.scope)
|
|
return;
|
|
this.scope.definitions.set(name, this.scope);
|
|
}
|
|
|
|
undefineVariable(name) {
|
|
this.scope.definitions.delete(name);
|
|
}
|
|
|
|
isVariableDefined(name) {
|
|
const info = this.scope.definitions.get(name);
|
|
if (info === undefined) return false;
|
|
if (info instanceof VariableInfo) {
|
|
return info.freeName === true;
|
|
}
|
|
return true;
|
|
}
|
|
|
|
/**
|
|
* @param {string} name variable name
|
|
* @returns {ExportedVariableInfo} info for this variable
|
|
*/
|
|
getVariableInfo(name) {
|
|
const value = this.scope.definitions.get(name);
|
|
if (value === undefined) {
|
|
return name;
|
|
} else {
|
|
return value;
|
|
}
|
|
}
|
|
|
|
/**
|
|
* @param {string} name variable name
|
|
* @param {ExportedVariableInfo} variableInfo new info for this variable
|
|
* @returns {void}
|
|
*/
|
|
setVariable(name, variableInfo) {
|
|
if (typeof variableInfo === "string") {
|
|
if (variableInfo === name) {
|
|
this.scope.definitions.delete(name);
|
|
} else {
|
|
this.scope.definitions.set(
|
|
name,
|
|
new VariableInfo(this.scope, variableInfo, undefined)
|
|
);
|
|
}
|
|
} else {
|
|
this.scope.definitions.set(name, variableInfo);
|
|
}
|
|
}
|
|
|
|
parseCommentOptions(range) {
|
|
const comments = this.getComments(range);
|
|
if (comments.length === 0) {
|
|
return EMPTY_COMMENT_OPTIONS;
|
|
}
|
|
let options = {};
|
|
let errors = [];
|
|
for (const comment of comments) {
|
|
const { value } = comment;
|
|
if (value && webpackCommentRegExp.test(value)) {
|
|
// try compile only if webpack options comment is present
|
|
try {
|
|
const val = vm.runInNewContext(`(function(){return {${value}};})()`);
|
|
Object.assign(options, val);
|
|
} catch (e) {
|
|
e.comment = comment;
|
|
errors.push(e);
|
|
}
|
|
}
|
|
}
|
|
return { options, errors };
|
|
}
|
|
|
|
/**
|
|
* @param {MemberExpressionNode} expression a member expression
|
|
* @returns {{ members: string[], object: ExpressionNode | SuperNode }} member names (reverse order) and remaining object
|
|
*/
|
|
extractMemberExpressionChain(expression) {
|
|
/** @type {AnyNode} */
|
|
let expr = expression;
|
|
const members = [];
|
|
while (expr.type === "MemberExpression") {
|
|
if (expr.computed) {
|
|
if (expr.property.type !== "Literal") break;
|
|
members.push(`${expr.property.value}`);
|
|
} else {
|
|
if (expr.property.type !== "Identifier") break;
|
|
members.push(expr.property.name);
|
|
}
|
|
expr = expr.object;
|
|
}
|
|
return {
|
|
members,
|
|
object: expr
|
|
};
|
|
}
|
|
|
|
/**
|
|
* @param {string} varName variable name
|
|
* @returns {{name: string, info: VariableInfo | string}} name of the free variable and variable info for that
|
|
*/
|
|
getFreeInfoFromVariable(varName) {
|
|
const info = this.getVariableInfo(varName);
|
|
let name;
|
|
if (info instanceof VariableInfo) {
|
|
name = info.freeName;
|
|
if (typeof name !== "string") return undefined;
|
|
} else if (typeof info !== "string") {
|
|
return undefined;
|
|
} else {
|
|
name = info;
|
|
}
|
|
return { info, name };
|
|
}
|
|
|
|
/** @typedef {{ type: "call", call: CallExpressionNode, calleeName: string, rootInfo: string | VariableInfo, getCalleeMembers: () => string[], name: string, getMembers: () => string[]}} CallExpressionInfo */
|
|
/** @typedef {{ type: "expression", rootInfo: string | VariableInfo, name: string, getMembers: () => string[]}} ExpressionExpressionInfo */
|
|
|
|
/**
|
|
* @param {MemberExpressionNode} expression a member expression
|
|
* @param {("call"|"expression")[]} allowedTypes which types should be returned
|
|
* @returns {CallExpressionInfo | ExpressionExpressionInfo | undefined} expression info
|
|
*/
|
|
getMemberExpressionInfo(expression, allowedTypes) {
|
|
const possibleTypes = new Set(allowedTypes);
|
|
const { object, members } = this.extractMemberExpressionChain(expression);
|
|
switch (object.type) {
|
|
case "CallExpression": {
|
|
if (!possibleTypes.has("call")) return undefined;
|
|
let callee = object.callee;
|
|
let rootMembers = EMPTY_ARRAY;
|
|
if (callee.type === "MemberExpression") {
|
|
({
|
|
object: callee,
|
|
members: rootMembers
|
|
} = this.extractMemberExpressionChain(callee));
|
|
}
|
|
const rootName = getRootName(callee);
|
|
if (!rootName) return undefined;
|
|
const result = this.getFreeInfoFromVariable(rootName);
|
|
if (!result) return undefined;
|
|
const { info: rootInfo, name: resolvedRoot } = result;
|
|
const calleeName = objectAndMembersToName(resolvedRoot, rootMembers);
|
|
return {
|
|
type: "call",
|
|
call: object,
|
|
calleeName,
|
|
rootInfo,
|
|
getCalleeMembers: memorize(() => rootMembers.reverse()),
|
|
name: objectAndMembersToName(`${calleeName}()`, members),
|
|
getMembers: memorize(() => members.reverse())
|
|
};
|
|
}
|
|
case "Identifier":
|
|
case "MetaProperty":
|
|
case "ThisExpression": {
|
|
if (!possibleTypes.has("expression")) return undefined;
|
|
const rootName = getRootName(object);
|
|
if (!rootName) return undefined;
|
|
|
|
const result = this.getFreeInfoFromVariable(rootName);
|
|
if (!result) return undefined;
|
|
const { info: rootInfo, name: resolvedRoot } = result;
|
|
return {
|
|
type: "expression",
|
|
name: objectAndMembersToName(resolvedRoot, members),
|
|
rootInfo,
|
|
getMembers: memorize(() => members.reverse())
|
|
};
|
|
}
|
|
}
|
|
}
|
|
|
|
/**
|
|
* @param {MemberExpressionNode} expression an expression
|
|
* @returns {{ name: string, rootInfo: ExportedVariableInfo, getMembers: () => string[]}} name info
|
|
*/
|
|
getNameForExpression(expression) {
|
|
return this.getMemberExpressionInfo(expression, ["expression"]);
|
|
}
|
|
|
|
/**
|
|
* @param {string} code source code
|
|
* @param {ParseOptions} options parsing options
|
|
* @returns {ProgramNode} parsed ast
|
|
*/
|
|
static parse(code, options) {
|
|
const type = options ? options.sourceType : "module";
|
|
/** @type {AcornOptions} */
|
|
const parserOptions = {
|
|
...defaultParserOptions,
|
|
allowReturnOutsideFunction: type === "script",
|
|
...options,
|
|
sourceType: type === "auto" ? "module" : type
|
|
};
|
|
|
|
/** @type {AnyNode} */
|
|
let ast;
|
|
let error;
|
|
let threw = false;
|
|
try {
|
|
ast = /** @type {AnyNode} */ (parser.parse(code, parserOptions));
|
|
} catch (e) {
|
|
error = e;
|
|
threw = true;
|
|
}
|
|
|
|
if (threw && type === "auto") {
|
|
parserOptions.sourceType = "script";
|
|
if (!("allowReturnOutsideFunction" in options)) {
|
|
parserOptions.allowReturnOutsideFunction = true;
|
|
}
|
|
if (Array.isArray(parserOptions.onComment)) {
|
|
parserOptions.onComment.length = 0;
|
|
}
|
|
try {
|
|
ast = /** @type {AnyNode} */ (parser.parse(code, parserOptions));
|
|
threw = false;
|
|
} catch (e) {
|
|
// we use the error from first parse try
|
|
// so nothing to do here
|
|
}
|
|
}
|
|
|
|
if (threw) {
|
|
throw error;
|
|
}
|
|
|
|
return /** @type {ProgramNode} */ (ast);
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}
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}
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module.exports = JavascriptParser;
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