161 lines
7.8 KiB
Plaintext
161 lines
7.8 KiB
Plaintext
"use strict";
|
|
var __createBinding = (this && this.__createBinding) || (Object.create ? (function(o, m, k, k2) {
|
|
if (k2 === undefined) k2 = k;
|
|
var desc = Object.getOwnPropertyDescriptor(m, k);
|
|
if (!desc || ("get" in desc ? !m.__esModule : desc.writable || desc.configurable)) {
|
|
desc = { enumerable: true, get: function() { return m[k]; } };
|
|
}
|
|
Object.defineProperty(o, k2, desc);
|
|
}) : (function(o, m, k, k2) {
|
|
if (k2 === undefined) k2 = k;
|
|
o[k2] = m[k];
|
|
}));
|
|
var __setModuleDefault = (this && this.__setModuleDefault) || (Object.create ? (function(o, v) {
|
|
Object.defineProperty(o, "default", { enumerable: true, value: v });
|
|
}) : function(o, v) {
|
|
o["default"] = v;
|
|
});
|
|
var __importStar = (this && this.__importStar) || function (mod) {
|
|
if (mod && mod.__esModule) return mod;
|
|
var result = {};
|
|
if (mod != null) for (var k in mod) if (k !== "default" && Object.prototype.hasOwnProperty.call(mod, k)) __createBinding(result, mod, k);
|
|
__setModuleDefault(result, mod);
|
|
return result;
|
|
};
|
|
Object.defineProperty(exports, "__esModule", { value: true });
|
|
const utils_1 = require("@typescript-eslint/utils");
|
|
const tsutils = __importStar(require("ts-api-utils"));
|
|
const ts = __importStar(require("typescript"));
|
|
const util_1 = require("../util");
|
|
exports.default = (0, util_1.createRule)({
|
|
name: 'no-unsafe-return',
|
|
meta: {
|
|
type: 'problem',
|
|
docs: {
|
|
description: 'Disallow returning a value with type `any` from a function',
|
|
recommended: 'recommended',
|
|
requiresTypeChecking: true,
|
|
},
|
|
messages: {
|
|
unsafeReturn: 'Unsafe return of an `{{type}}` typed value.',
|
|
unsafeReturnThis: [
|
|
'Unsafe return of an `{{type}}` typed value. `this` is typed as `any`.',
|
|
'You can try to fix this by turning on the `noImplicitThis` compiler option, or adding a `this` parameter to the function.',
|
|
].join('\n'),
|
|
unsafeReturnAssignment: 'Unsafe return of type `{{sender}}` from function with return type `{{receiver}}`.',
|
|
},
|
|
schema: [],
|
|
},
|
|
defaultOptions: [],
|
|
create(context) {
|
|
const services = (0, util_1.getParserServices)(context);
|
|
const checker = services.program.getTypeChecker();
|
|
const compilerOptions = services.program.getCompilerOptions();
|
|
const isNoImplicitThis = tsutils.isStrictCompilerOptionEnabled(compilerOptions, 'noImplicitThis');
|
|
function getParentFunctionNode(node) {
|
|
let current = node.parent;
|
|
while (current) {
|
|
if (current.type === utils_1.AST_NODE_TYPES.ArrowFunctionExpression ||
|
|
current.type === utils_1.AST_NODE_TYPES.FunctionDeclaration ||
|
|
current.type === utils_1.AST_NODE_TYPES.FunctionExpression) {
|
|
return current;
|
|
}
|
|
current = current.parent;
|
|
}
|
|
// this shouldn't happen in correct code, but someone may attempt to parse bad code
|
|
// the parser won't error, so we shouldn't throw here
|
|
/* istanbul ignore next */ return null;
|
|
}
|
|
function checkReturn(returnNode, reportingNode = returnNode) {
|
|
const tsNode = services.esTreeNodeToTSNodeMap.get(returnNode);
|
|
const anyType = (0, util_1.isAnyOrAnyArrayTypeDiscriminated)(tsNode, checker);
|
|
const functionNode = getParentFunctionNode(returnNode);
|
|
/* istanbul ignore if */ if (!functionNode) {
|
|
return;
|
|
}
|
|
// function has an explicit return type, so ensure it's a safe return
|
|
const returnNodeType = (0, util_1.getConstrainedTypeAtLocation)(services, returnNode);
|
|
const functionTSNode = services.esTreeNodeToTSNodeMap.get(functionNode);
|
|
// function expressions will not have their return type modified based on receiver typing
|
|
// so we have to use the contextual typing in these cases, i.e.
|
|
// const foo1: () => Set<string> = () => new Set<any>();
|
|
// the return type of the arrow function is Set<any> even though the variable is typed as Set<string>
|
|
let functionType = ts.isFunctionExpression(functionTSNode) ||
|
|
ts.isArrowFunction(functionTSNode)
|
|
? (0, util_1.getContextualType)(checker, functionTSNode)
|
|
: services.getTypeAtLocation(functionNode);
|
|
if (!functionType) {
|
|
functionType = services.getTypeAtLocation(functionNode);
|
|
}
|
|
// If there is an explicit type annotation *and* that type matches the actual
|
|
// function return type, we shouldn't complain (it's intentional, even if unsafe)
|
|
if (functionTSNode.type) {
|
|
for (const signature of functionType.getCallSignatures()) {
|
|
if (returnNodeType === signature.getReturnType() ||
|
|
(0, util_1.isTypeFlagSet)(signature.getReturnType(), ts.TypeFlags.Any | ts.TypeFlags.Unknown)) {
|
|
return;
|
|
}
|
|
}
|
|
}
|
|
if (anyType !== util_1.AnyType.Safe) {
|
|
// Allow cases when the declared return type of the function is either unknown or unknown[]
|
|
// and the function is returning any or any[].
|
|
for (const signature of functionType.getCallSignatures()) {
|
|
const functionReturnType = signature.getReturnType();
|
|
if (anyType === util_1.AnyType.Any &&
|
|
(0, util_1.isTypeUnknownType)(functionReturnType)) {
|
|
return;
|
|
}
|
|
if (anyType === util_1.AnyType.AnyArray &&
|
|
(0, util_1.isTypeUnknownArrayType)(functionReturnType, checker)) {
|
|
return;
|
|
}
|
|
}
|
|
let messageId = 'unsafeReturn';
|
|
if (!isNoImplicitThis) {
|
|
// `return this`
|
|
const thisExpression = (0, util_1.getThisExpression)(returnNode);
|
|
if (thisExpression &&
|
|
(0, util_1.isTypeAnyType)((0, util_1.getConstrainedTypeAtLocation)(services, thisExpression))) {
|
|
messageId = 'unsafeReturnThis';
|
|
}
|
|
}
|
|
// If the function return type was not unknown/unknown[], mark usage as unsafeReturn.
|
|
return context.report({
|
|
node: reportingNode,
|
|
messageId,
|
|
data: {
|
|
type: anyType === util_1.AnyType.Any ? 'any' : 'any[]',
|
|
},
|
|
});
|
|
}
|
|
for (const signature of functionType.getCallSignatures()) {
|
|
const functionReturnType = signature.getReturnType();
|
|
const result = (0, util_1.isUnsafeAssignment)(returnNodeType, functionReturnType, checker, returnNode);
|
|
if (!result) {
|
|
return;
|
|
}
|
|
const { sender, receiver } = result;
|
|
return context.report({
|
|
node: reportingNode,
|
|
messageId: 'unsafeReturnAssignment',
|
|
data: {
|
|
sender: checker.typeToString(sender),
|
|
receiver: checker.typeToString(receiver),
|
|
},
|
|
});
|
|
}
|
|
}
|
|
return {
|
|
ReturnStatement(node) {
|
|
const argument = node.argument;
|
|
if (!argument) {
|
|
return;
|
|
}
|
|
checkReturn(argument, node);
|
|
},
|
|
'ArrowFunctionExpression > :not(BlockStatement).body': checkReturn,
|
|
};
|
|
},
|
|
});
|
|
//# sourceMappingURL=no-unsafe-return.js.map |