424 lines
11 KiB
JavaScript
424 lines
11 KiB
JavaScript
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"use strict";
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Object.defineProperty(exports, "__esModule", {
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value: true
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});
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exports.matchesPattern = matchesPattern;
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exports.has = has;
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exports.isStatic = isStatic;
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exports.isnt = isnt;
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exports.equals = equals;
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exports.isNodeType = isNodeType;
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exports.canHaveVariableDeclarationOrExpression = canHaveVariableDeclarationOrExpression;
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exports.canSwapBetweenExpressionAndStatement = canSwapBetweenExpressionAndStatement;
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exports.isCompletionRecord = isCompletionRecord;
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exports.isStatementOrBlock = isStatementOrBlock;
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exports.referencesImport = referencesImport;
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exports.getSource = getSource;
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exports.willIMaybeExecuteBefore = willIMaybeExecuteBefore;
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exports._guessExecutionStatusRelativeTo = _guessExecutionStatusRelativeTo;
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exports._guessExecutionStatusRelativeToDifferentFunctions = _guessExecutionStatusRelativeToDifferentFunctions;
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exports.resolve = resolve;
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exports._resolve = _resolve;
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exports.isConstantExpression = isConstantExpression;
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exports.isInStrictMode = isInStrictMode;
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exports.is = void 0;
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var t = require("@babel/types");
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function matchesPattern(pattern, allowPartial) {
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return t.matchesPattern(this.node, pattern, allowPartial);
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}
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function has(key) {
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const val = this.node && this.node[key];
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if (val && Array.isArray(val)) {
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return !!val.length;
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} else {
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return !!val;
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}
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}
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function isStatic() {
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return this.scope.isStatic(this.node);
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}
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const is = has;
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exports.is = is;
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function isnt(key) {
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return !this.has(key);
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}
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function equals(key, value) {
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return this.node[key] === value;
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}
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function isNodeType(type) {
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return t.isType(this.type, type);
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}
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function canHaveVariableDeclarationOrExpression() {
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return (this.key === "init" || this.key === "left") && this.parentPath.isFor();
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}
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function canSwapBetweenExpressionAndStatement(replacement) {
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if (this.key !== "body" || !this.parentPath.isArrowFunctionExpression()) {
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return false;
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}
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if (this.isExpression()) {
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return t.isBlockStatement(replacement);
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} else if (this.isBlockStatement()) {
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return t.isExpression(replacement);
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}
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return false;
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}
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function isCompletionRecord(allowInsideFunction) {
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let path = this;
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let first = true;
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do {
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const container = path.container;
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if (path.isFunction() && !first) {
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return !!allowInsideFunction;
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}
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first = false;
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if (Array.isArray(container) && path.key !== container.length - 1) {
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return false;
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}
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} while ((path = path.parentPath) && !path.isProgram());
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return true;
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}
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function isStatementOrBlock() {
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if (this.parentPath.isLabeledStatement() || t.isBlockStatement(this.container)) {
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return false;
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} else {
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return t.STATEMENT_OR_BLOCK_KEYS.includes(this.key);
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}
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}
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function referencesImport(moduleSource, importName) {
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if (!this.isReferencedIdentifier()) {
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if ((this.isMemberExpression() || this.isOptionalMemberExpression()) && (this.node.computed ? t.isStringLiteral(this.node.property, {
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value: importName
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}) : this.node.property.name === importName)) {
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const object = this.get("object");
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return object.isReferencedIdentifier() && object.referencesImport(moduleSource, "*");
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}
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return false;
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}
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const binding = this.scope.getBinding(this.node.name);
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if (!binding || binding.kind !== "module") return false;
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const path = binding.path;
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const parent = path.parentPath;
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if (!parent.isImportDeclaration()) return false;
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if (parent.node.source.value === moduleSource) {
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if (!importName) return true;
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} else {
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return false;
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}
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if (path.isImportDefaultSpecifier() && importName === "default") {
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return true;
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}
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if (path.isImportNamespaceSpecifier() && importName === "*") {
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return true;
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}
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if (path.isImportSpecifier() && t.isIdentifier(path.node.imported, {
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name: importName
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})) {
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return true;
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}
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return false;
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}
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function getSource() {
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const node = this.node;
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if (node.end) {
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const code = this.hub.getCode();
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if (code) return code.slice(node.start, node.end);
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}
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return "";
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}
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function willIMaybeExecuteBefore(target) {
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return this._guessExecutionStatusRelativeTo(target) !== "after";
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}
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function getOuterFunction(path) {
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return (path.scope.getFunctionParent() || path.scope.getProgramParent()).path;
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}
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function isExecutionUncertain(type, key) {
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switch (type) {
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case "LogicalExpression":
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return key === "right";
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case "ConditionalExpression":
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case "IfStatement":
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return key === "consequent" || key === "alternate";
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case "WhileStatement":
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case "DoWhileStatement":
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case "ForInStatement":
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case "ForOfStatement":
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return key === "body";
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case "ForStatement":
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return key === "body" || key === "update";
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case "SwitchStatement":
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return key === "cases";
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case "TryStatement":
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return key === "handler";
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case "AssignmentPattern":
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return key === "right";
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case "OptionalMemberExpression":
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return key === "property";
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case "OptionalCallExpression":
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return key === "arguments";
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default:
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return false;
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}
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}
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function isExecutionUncertainInList(paths, maxIndex) {
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for (let i = 0; i < maxIndex; i++) {
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const path = paths[i];
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if (isExecutionUncertain(path.parent.type, path.parentKey)) {
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return true;
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}
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}
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return false;
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}
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function _guessExecutionStatusRelativeTo(target) {
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const funcParent = {
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this: getOuterFunction(this),
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target: getOuterFunction(target)
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};
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if (funcParent.target.node !== funcParent.this.node) {
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return this._guessExecutionStatusRelativeToDifferentFunctions(funcParent.target);
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}
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const paths = {
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target: target.getAncestry(),
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this: this.getAncestry()
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};
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if (paths.target.indexOf(this) >= 0) return "after";
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if (paths.this.indexOf(target) >= 0) return "before";
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let commonPath;
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const commonIndex = {
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target: 0,
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this: 0
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};
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while (!commonPath && commonIndex.this < paths.this.length) {
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const path = paths.this[commonIndex.this];
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commonIndex.target = paths.target.indexOf(path);
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if (commonIndex.target >= 0) {
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commonPath = path;
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} else {
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commonIndex.this++;
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}
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}
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if (!commonPath) {
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throw new Error("Internal Babel error - The two compared nodes" + " don't appear to belong to the same program.");
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}
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if (isExecutionUncertainInList(paths.this, commonIndex.this - 1) || isExecutionUncertainInList(paths.target, commonIndex.target - 1)) {
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return "unknown";
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}
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const divergence = {
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this: paths.this[commonIndex.this - 1],
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target: paths.target[commonIndex.target - 1]
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};
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if (divergence.target.listKey && divergence.this.listKey && divergence.target.container === divergence.this.container) {
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return divergence.target.key > divergence.this.key ? "before" : "after";
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}
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const keys = t.VISITOR_KEYS[commonPath.type];
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const keyPosition = {
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this: keys.indexOf(divergence.this.parentKey),
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target: keys.indexOf(divergence.target.parentKey)
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};
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return keyPosition.target > keyPosition.this ? "before" : "after";
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}
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const executionOrderCheckedNodes = new WeakSet();
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function _guessExecutionStatusRelativeToDifferentFunctions(target) {
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if (!target.isFunctionDeclaration() || target.parentPath.isExportDeclaration()) {
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return "unknown";
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}
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const binding = target.scope.getBinding(target.node.id.name);
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if (!binding.references) return "before";
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const referencePaths = binding.referencePaths;
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let allStatus;
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for (const path of referencePaths) {
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const childOfFunction = !!path.find(path => path.node === target.node);
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if (childOfFunction) continue;
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if (path.key !== "callee" || !path.parentPath.isCallExpression()) {
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return "unknown";
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}
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if (executionOrderCheckedNodes.has(path.node)) continue;
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executionOrderCheckedNodes.add(path.node);
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const status = this._guessExecutionStatusRelativeTo(path);
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executionOrderCheckedNodes.delete(path.node);
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if (allStatus && allStatus !== status) {
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return "unknown";
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} else {
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allStatus = status;
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}
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}
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return allStatus;
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}
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function resolve(dangerous, resolved) {
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return this._resolve(dangerous, resolved) || this;
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}
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function _resolve(dangerous, resolved) {
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if (resolved && resolved.indexOf(this) >= 0) return;
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resolved = resolved || [];
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resolved.push(this);
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if (this.isVariableDeclarator()) {
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if (this.get("id").isIdentifier()) {
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return this.get("init").resolve(dangerous, resolved);
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} else {}
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} else if (this.isReferencedIdentifier()) {
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const binding = this.scope.getBinding(this.node.name);
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if (!binding) return;
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if (!binding.constant) return;
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if (binding.kind === "module") return;
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if (binding.path !== this) {
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const ret = binding.path.resolve(dangerous, resolved);
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if (this.find(parent => parent.node === ret.node)) return;
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return ret;
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}
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} else if (this.isTypeCastExpression()) {
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return this.get("expression").resolve(dangerous, resolved);
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} else if (dangerous && this.isMemberExpression()) {
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const targetKey = this.toComputedKey();
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if (!t.isLiteral(targetKey)) return;
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const targetName = targetKey.value;
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const target = this.get("object").resolve(dangerous, resolved);
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if (target.isObjectExpression()) {
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const props = target.get("properties");
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for (const prop of props) {
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if (!prop.isProperty()) continue;
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const key = prop.get("key");
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let match = prop.isnt("computed") && key.isIdentifier({
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name: targetName
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});
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match = match || key.isLiteral({
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value: targetName
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});
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if (match) return prop.get("value").resolve(dangerous, resolved);
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}
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} else if (target.isArrayExpression() && !isNaN(+targetName)) {
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const elems = target.get("elements");
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const elem = elems[targetName];
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if (elem) return elem.resolve(dangerous, resolved);
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}
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}
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}
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function isConstantExpression() {
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if (this.isIdentifier()) {
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const binding = this.scope.getBinding(this.node.name);
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if (!binding) return false;
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return binding.constant;
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}
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if (this.isLiteral()) {
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if (this.isRegExpLiteral()) {
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return false;
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}
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if (this.isTemplateLiteral()) {
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return this.get("expressions").every(expression => expression.isConstantExpression());
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}
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return true;
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}
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if (this.isUnaryExpression()) {
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if (this.node.operator !== "void") {
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return false;
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}
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return this.get("argument").isConstantExpression();
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}
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if (this.isBinaryExpression()) {
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return this.get("left").isConstantExpression() && this.get("right").isConstantExpression();
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}
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return false;
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}
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function isInStrictMode() {
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const start = this.isProgram() ? this : this.parentPath;
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const strictParent = start.find(path => {
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if (path.isProgram({
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sourceType: "module"
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})) return true;
|
||
|
|
if (path.isClass()) return true;
|
||
|
|
if (!path.isProgram() && !path.isFunction()) return false;
|
||
|
|
|
||
|
|
if (path.isArrowFunctionExpression() && !path.get("body").isBlockStatement()) {
|
||
|
|
return false;
|
||
|
|
}
|
||
|
|
|
||
|
|
const body = path.isFunction() ? path.node.body : path.node;
|
||
|
|
|
||
|
|
for (const directive of body.directives) {
|
||
|
|
if (directive.value.value === "use strict") {
|
||
|
|
return true;
|
||
|
|
}
|
||
|
|
}
|
||
|
|
});
|
||
|
|
return !!strictParent;
|
||
|
|
}
|