106 lines
4.4 KiB
Plaintext
106 lines
4.4 KiB
Plaintext
"use strict";
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var __createBinding = (this && this.__createBinding) || (Object.create ? (function(o, m, k, k2) {
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if (k2 === undefined) k2 = k;
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var desc = Object.getOwnPropertyDescriptor(m, k);
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if (!desc || ("get" in desc ? !m.__esModule : desc.writable || desc.configurable)) {
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desc = { enumerable: true, get: function() { return m[k]; } };
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}
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Object.defineProperty(o, k2, desc);
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}) : (function(o, m, k, k2) {
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if (k2 === undefined) k2 = k;
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o[k2] = m[k];
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}));
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var __setModuleDefault = (this && this.__setModuleDefault) || (Object.create ? (function(o, v) {
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Object.defineProperty(o, "default", { enumerable: true, value: v });
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}) : function(o, v) {
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o["default"] = v;
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});
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var __importStar = (this && this.__importStar) || function (mod) {
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if (mod && mod.__esModule) return mod;
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var result = {};
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if (mod != null) for (var k in mod) if (k !== "default" && Object.prototype.hasOwnProperty.call(mod, k)) __createBinding(result, mod, k);
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__setModuleDefault(result, mod);
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return result;
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};
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Object.defineProperty(exports, "__esModule", { value: true });
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exports.isUnsafeAssignment = void 0;
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const utils_1 = require("@typescript-eslint/utils");
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const tsutils = __importStar(require("ts-api-utils"));
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const predicates_1 = require("./predicates");
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/**
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* Does a simple check to see if there is an any being assigned to a non-any type.
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*
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* This also checks generic positions to ensure there's no unsafe sub-assignments.
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* Note: in the case of generic positions, it makes the assumption that the two types are the same.
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*
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* @example See tests for examples
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*
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* @returns false if it's safe, or an object with the two types if it's unsafe
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*/
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function isUnsafeAssignment(type, receiver, checker, senderNode) {
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return isUnsafeAssignmentWorker(type, receiver, checker, senderNode, new Map());
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}
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exports.isUnsafeAssignment = isUnsafeAssignment;
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function isUnsafeAssignmentWorker(type, receiver, checker, senderNode, visited) {
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if ((0, predicates_1.isTypeAnyType)(type)) {
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// Allow assignment of any ==> unknown.
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if ((0, predicates_1.isTypeUnknownType)(receiver)) {
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return false;
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}
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if (!(0, predicates_1.isTypeAnyType)(receiver)) {
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return { sender: type, receiver };
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}
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}
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const typeAlreadyVisited = visited.get(type);
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if (typeAlreadyVisited) {
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if (typeAlreadyVisited.has(receiver)) {
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return false;
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}
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typeAlreadyVisited.add(receiver);
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}
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else {
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visited.set(type, new Set([receiver]));
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}
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if (tsutils.isTypeReference(type) && tsutils.isTypeReference(receiver)) {
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// TODO - figure out how to handle cases like this,
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// where the types are assignable, but not the same type
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/*
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function foo(): ReadonlySet<number> { return new Set<any>(); }
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// and
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type Test<T> = { prop: T }
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type Test2 = { prop: string }
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declare const a: Test<any>;
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const b: Test2 = a;
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*/
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if (type.target !== receiver.target) {
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// if the type references are different, assume safe, as we won't know how to compare the two types
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// the generic positions might not be equivalent for both types
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return false;
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}
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if (senderNode?.type === utils_1.AST_NODE_TYPES.NewExpression &&
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senderNode.callee.type === utils_1.AST_NODE_TYPES.Identifier &&
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senderNode.callee.name === 'Map' &&
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senderNode.arguments.length === 0 &&
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senderNode.typeArguments == null) {
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// special case to handle `new Map()`
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// unfortunately Map's default empty constructor is typed to return `Map<any, any>` :(
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// https://github.com/typescript-eslint/typescript-eslint/issues/2109#issuecomment-634144396
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return false;
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}
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const typeArguments = type.typeArguments ?? [];
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const receiverTypeArguments = receiver.typeArguments ?? [];
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for (let i = 0; i < typeArguments.length; i += 1) {
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const arg = typeArguments[i];
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const receiverArg = receiverTypeArguments[i];
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const unsafe = isUnsafeAssignmentWorker(arg, receiverArg, checker, senderNode, visited);
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if (unsafe) {
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return { sender: type, receiver };
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}
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}
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return false;
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}
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return false;
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}
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//# sourceMappingURL=isUnsafeAssignment.js.map |