@typescript-eslint/eslint-plugin
Version:
TypeScript plugin for ESLint
711 lines • 33.4 kB
JavaScript
"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");
function parseChecksVoidReturn(checksVoidReturn) {
switch (checksVoidReturn) {
case false:
return false;
case true:
case undefined:
return {
arguments: true,
attributes: true,
inheritedMethods: true,
properties: true,
returns: true,
variables: true,
};
default:
return {
arguments: checksVoidReturn.arguments ?? true,
attributes: checksVoidReturn.attributes ?? true,
inheritedMethods: checksVoidReturn.inheritedMethods ?? true,
properties: checksVoidReturn.properties ?? true,
returns: checksVoidReturn.returns ?? true,
variables: checksVoidReturn.variables ?? true,
};
}
}
exports.default = (0, util_1.createRule)({
name: 'no-misused-promises',
meta: {
docs: {
description: 'Disallow Promises in places not designed to handle them',
recommended: 'recommended',
requiresTypeChecking: true,
},
messages: {
voidReturnArgument: 'Promise returned in function argument where a void return was expected.',
voidReturnAttribute: 'Promise-returning function provided to attribute where a void return was expected.',
voidReturnInheritedMethod: "Promise-returning method provided where a void return was expected by extended/implemented type '{{ heritageTypeName }}'.",
voidReturnProperty: 'Promise-returning function provided to property where a void return was expected.',
voidReturnReturnValue: 'Promise-returning function provided to return value where a void return was expected.',
voidReturnVariable: 'Promise-returning function provided to variable where a void return was expected.',
conditional: 'Expected non-Promise value in a boolean conditional.',
predicate: 'Expected a non-Promise value to be returned.',
spread: 'Expected a non-Promise value to be spreaded in an object.',
},
schema: [
{
type: 'object',
additionalProperties: false,
properties: {
checksConditionals: {
type: 'boolean',
},
checksVoidReturn: {
oneOf: [
{ type: 'boolean' },
{
additionalProperties: false,
properties: {
arguments: {
description: 'Disables checking an asynchronous function passed as argument where the parameter type expects a function that returns `void`.',
type: 'boolean',
},
attributes: {
description: 'Disables checking an asynchronous function passed as a JSX attribute expected to be a function that returns `void`.',
type: 'boolean',
},
inheritedMethods: {
description: 'Disables checking an asynchronous method in a type that extends or implements another type expecting that method to return `void`.',
type: 'boolean',
},
properties: {
description: 'Disables checking an asynchronous function passed as an object property expected to be a function that returns `void`.',
type: 'boolean',
},
returns: {
description: 'Disables checking an asynchronous function returned in a function whose return type is a function that returns `void`.',
type: 'boolean',
},
variables: {
description: 'Disables checking an asynchronous function used as a variable whose return type is a function that returns `void`.',
type: 'boolean',
},
},
type: 'object',
},
],
},
checksSpreads: {
description: 'Whether to warn when `...` spreading a `Promise`.',
type: 'boolean',
},
},
},
],
type: 'problem',
},
defaultOptions: [
{
checksConditionals: true,
checksVoidReturn: true,
checksSpreads: true,
},
],
create(context, [{ checksConditionals, checksVoidReturn, checksSpreads }]) {
const services = (0, util_1.getParserServices)(context);
const checker = services.program.getTypeChecker();
const checkedNodes = new Set();
const conditionalChecks = {
ConditionalExpression: checkTestConditional,
DoWhileStatement: checkTestConditional,
ForStatement: checkTestConditional,
IfStatement: checkTestConditional,
LogicalExpression: checkConditional,
'UnaryExpression[operator="!"]'(node) {
checkConditional(node.argument, true);
},
WhileStatement: checkTestConditional,
'CallExpression > MemberExpression': checkArrayPredicates,
};
checksVoidReturn = parseChecksVoidReturn(checksVoidReturn);
const voidReturnChecks = checksVoidReturn
? {
...(checksVoidReturn.arguments && {
CallExpression: checkArguments,
NewExpression: checkArguments,
}),
...(checksVoidReturn.attributes && {
JSXAttribute: checkJSXAttribute,
}),
...(checksVoidReturn.inheritedMethods && {
ClassDeclaration: checkClassLikeOrInterfaceNode,
ClassExpression: checkClassLikeOrInterfaceNode,
TSInterfaceDeclaration: checkClassLikeOrInterfaceNode,
}),
...(checksVoidReturn.properties && {
Property: checkProperty,
}),
...(checksVoidReturn.returns && {
ReturnStatement: checkReturnStatement,
}),
...(checksVoidReturn.variables && {
AssignmentExpression: checkAssignment,
VariableDeclarator: checkVariableDeclaration,
}),
}
: {};
const spreadChecks = {
SpreadElement: checkSpread,
};
/**
* A syntactic check to see if an annotated type is maybe a function type.
* This is a perf optimization to help avoid requesting types where possible
*/
function isPossiblyFunctionType(node) {
switch (node.typeAnnotation.type) {
case utils_1.AST_NODE_TYPES.TSConditionalType:
case utils_1.AST_NODE_TYPES.TSConstructorType:
case utils_1.AST_NODE_TYPES.TSFunctionType:
case utils_1.AST_NODE_TYPES.TSImportType:
case utils_1.AST_NODE_TYPES.TSIndexedAccessType:
case utils_1.AST_NODE_TYPES.TSInferType:
case utils_1.AST_NODE_TYPES.TSIntersectionType:
case utils_1.AST_NODE_TYPES.TSQualifiedName:
case utils_1.AST_NODE_TYPES.TSThisType:
case utils_1.AST_NODE_TYPES.TSTypeOperator:
case utils_1.AST_NODE_TYPES.TSTypeQuery:
case utils_1.AST_NODE_TYPES.TSTypeReference:
case utils_1.AST_NODE_TYPES.TSUnionType:
return true;
case utils_1.AST_NODE_TYPES.TSTypeLiteral:
return node.typeAnnotation.members.some(member => member.type === utils_1.AST_NODE_TYPES.TSCallSignatureDeclaration ||
member.type === utils_1.AST_NODE_TYPES.TSConstructSignatureDeclaration);
case utils_1.AST_NODE_TYPES.TSAbstractKeyword:
case utils_1.AST_NODE_TYPES.TSAnyKeyword:
case utils_1.AST_NODE_TYPES.TSArrayType:
case utils_1.AST_NODE_TYPES.TSAsyncKeyword:
case utils_1.AST_NODE_TYPES.TSBigIntKeyword:
case utils_1.AST_NODE_TYPES.TSBooleanKeyword:
case utils_1.AST_NODE_TYPES.TSDeclareKeyword:
case utils_1.AST_NODE_TYPES.TSExportKeyword:
case utils_1.AST_NODE_TYPES.TSIntrinsicKeyword:
case utils_1.AST_NODE_TYPES.TSLiteralType:
case utils_1.AST_NODE_TYPES.TSMappedType:
case utils_1.AST_NODE_TYPES.TSNamedTupleMember:
case utils_1.AST_NODE_TYPES.TSNeverKeyword:
case utils_1.AST_NODE_TYPES.TSNullKeyword:
case utils_1.AST_NODE_TYPES.TSNumberKeyword:
case utils_1.AST_NODE_TYPES.TSObjectKeyword:
case utils_1.AST_NODE_TYPES.TSOptionalType:
case utils_1.AST_NODE_TYPES.TSPrivateKeyword:
case utils_1.AST_NODE_TYPES.TSProtectedKeyword:
case utils_1.AST_NODE_TYPES.TSPublicKeyword:
case utils_1.AST_NODE_TYPES.TSReadonlyKeyword:
case utils_1.AST_NODE_TYPES.TSRestType:
case utils_1.AST_NODE_TYPES.TSStaticKeyword:
case utils_1.AST_NODE_TYPES.TSStringKeyword:
case utils_1.AST_NODE_TYPES.TSSymbolKeyword:
case utils_1.AST_NODE_TYPES.TSTemplateLiteralType:
case utils_1.AST_NODE_TYPES.TSTupleType:
case utils_1.AST_NODE_TYPES.TSTypePredicate:
case utils_1.AST_NODE_TYPES.TSUndefinedKeyword:
case utils_1.AST_NODE_TYPES.TSUnknownKeyword:
case utils_1.AST_NODE_TYPES.TSVoidKeyword:
return false;
}
}
function checkTestConditional(node) {
if (node.test) {
checkConditional(node.test, true);
}
}
/**
* This function analyzes the type of a node and checks if it is a Promise in a boolean conditional.
* It uses recursion when checking nested logical operators.
* @param node The AST node to check.
* @param isTestExpr Whether the node is a descendant of a test expression.
*/
function checkConditional(node, isTestExpr = false) {
// prevent checking the same node multiple times
if (checkedNodes.has(node)) {
return;
}
checkedNodes.add(node);
if (node.type === utils_1.AST_NODE_TYPES.LogicalExpression) {
// ignore the left operand for nullish coalescing expressions not in a context of a test expression
if (node.operator !== '??' || isTestExpr) {
checkConditional(node.left, isTestExpr);
}
// we ignore the right operand when not in a context of a test expression
if (isTestExpr) {
checkConditional(node.right, isTestExpr);
}
return;
}
const tsNode = services.esTreeNodeToTSNodeMap.get(node);
if (isAlwaysThenable(checker, tsNode)) {
context.report({
messageId: 'conditional',
node,
});
}
}
function checkArrayPredicates(node) {
const parent = node.parent;
if (parent.type === utils_1.AST_NODE_TYPES.CallExpression) {
const callback = parent.arguments.at(0);
if (callback &&
(0, util_1.isArrayMethodCallWithPredicate)(context, services, parent)) {
const type = services.esTreeNodeToTSNodeMap.get(callback);
if (returnsThenable(checker, type)) {
context.report({
messageId: 'predicate',
node: callback,
});
}
}
}
}
function checkArguments(node) {
const tsNode = services.esTreeNodeToTSNodeMap.get(node);
const voidArgs = voidFunctionArguments(checker, tsNode);
if (voidArgs.size === 0) {
return;
}
for (const [index, argument] of node.arguments.entries()) {
if (!voidArgs.has(index)) {
continue;
}
const tsNode = services.esTreeNodeToTSNodeMap.get(argument);
if (returnsThenable(checker, tsNode)) {
context.report({
messageId: 'voidReturnArgument',
node: argument,
});
}
}
}
function checkAssignment(node) {
const tsNode = services.esTreeNodeToTSNodeMap.get(node);
const varType = services.getTypeAtLocation(node.left);
if (!isVoidReturningFunctionType(checker, tsNode.left, varType)) {
return;
}
if (returnsThenable(checker, tsNode.right)) {
context.report({
messageId: 'voidReturnVariable',
node: node.right,
});
}
}
function checkVariableDeclaration(node) {
const tsNode = services.esTreeNodeToTSNodeMap.get(node);
if (tsNode.initializer === undefined ||
node.init == null ||
node.id.typeAnnotation == null) {
return;
}
// syntactically ignore some known-good cases to avoid touching type info
if (!isPossiblyFunctionType(node.id.typeAnnotation)) {
return;
}
const varType = services.getTypeAtLocation(node.id);
if (!isVoidReturningFunctionType(checker, tsNode.initializer, varType)) {
return;
}
if (returnsThenable(checker, tsNode.initializer)) {
context.report({
messageId: 'voidReturnVariable',
node: node.init,
});
}
}
function checkProperty(node) {
const tsNode = services.esTreeNodeToTSNodeMap.get(node);
if (ts.isPropertyAssignment(tsNode)) {
const contextualType = checker.getContextualType(tsNode.initializer);
if (contextualType !== undefined &&
isVoidReturningFunctionType(checker, tsNode.initializer, contextualType) &&
returnsThenable(checker, tsNode.initializer)) {
context.report({
messageId: 'voidReturnProperty',
node: node.value,
});
}
}
else if (ts.isShorthandPropertyAssignment(tsNode)) {
const contextualType = checker.getContextualType(tsNode.name);
if (contextualType !== undefined &&
isVoidReturningFunctionType(checker, tsNode.name, contextualType) &&
returnsThenable(checker, tsNode.name)) {
context.report({
messageId: 'voidReturnProperty',
node: node.value,
});
}
}
else if (ts.isMethodDeclaration(tsNode)) {
if (ts.isComputedPropertyName(tsNode.name)) {
return;
}
const obj = tsNode.parent;
// Below condition isn't satisfied unless something goes wrong,
// but is needed for type checking.
// 'node' does not include class method declaration so 'obj' is
// always an object literal expression, but after converting 'node'
// to TypeScript AST, its type includes MethodDeclaration which
// does include the case of class method declaration.
if (!ts.isObjectLiteralExpression(obj)) {
return;
}
if (!returnsThenable(checker, tsNode)) {
return;
}
const objType = checker.getContextualType(obj);
if (objType === undefined) {
return;
}
const propertySymbol = checker.getPropertyOfType(objType, tsNode.name.text);
if (propertySymbol === undefined) {
return;
}
const contextualType = checker.getTypeOfSymbolAtLocation(propertySymbol, tsNode.name);
if (isVoidReturningFunctionType(checker, tsNode.name, contextualType)) {
context.report({
messageId: 'voidReturnProperty',
node: node.value,
});
}
return;
}
}
function checkReturnStatement(node) {
const tsNode = services.esTreeNodeToTSNodeMap.get(node);
if (tsNode.expression === undefined || node.argument == null) {
return;
}
// syntactically ignore some known-good cases to avoid touching type info
const functionNode = (() => {
let current = node.parent;
while (current && !(0, util_1.isFunction)(current)) {
current = current.parent;
}
return (0, util_1.nullThrows)(current, util_1.NullThrowsReasons.MissingParent);
})();
if (functionNode.returnType &&
!isPossiblyFunctionType(functionNode.returnType)) {
return;
}
const contextualType = checker.getContextualType(tsNode.expression);
if (contextualType !== undefined &&
isVoidReturningFunctionType(checker, tsNode.expression, contextualType) &&
returnsThenable(checker, tsNode.expression)) {
context.report({
messageId: 'voidReturnReturnValue',
node: node.argument,
});
}
}
function checkClassLikeOrInterfaceNode(node) {
const tsNode = services.esTreeNodeToTSNodeMap.get(node);
const heritageTypes = getHeritageTypes(checker, tsNode);
if (!heritageTypes?.length) {
return;
}
for (const nodeMember of tsNode.members) {
const memberName = nodeMember.name?.getText();
if (memberName === undefined) {
// Call/construct/index signatures don't have names. TS allows call signatures to mismatch,
// and construct signatures can't be async.
// TODO - Once we're able to use `checker.isTypeAssignableTo` (v8), we can check an index
// signature here against its compatible index signatures in `heritageTypes`
continue;
}
if (!returnsThenable(checker, nodeMember)) {
continue;
}
const node = services.tsNodeToESTreeNodeMap.get(nodeMember);
if (isStaticMember(node)) {
continue;
}
for (const heritageType of heritageTypes) {
checkHeritageTypeForMemberReturningVoid(nodeMember, heritageType, memberName);
}
}
}
/**
* Checks `heritageType` for a member named `memberName` that returns void; reports the
* 'voidReturnInheritedMethod' message if found.
* @param nodeMember Node member that returns a Promise
* @param heritageType Heritage type to check against
* @param memberName Name of the member to check for
*/
function checkHeritageTypeForMemberReturningVoid(nodeMember, heritageType, memberName) {
const heritageMember = getMemberIfExists(heritageType, memberName);
if (heritageMember === undefined) {
return;
}
const memberType = checker.getTypeOfSymbolAtLocation(heritageMember, nodeMember);
if (!isVoidReturningFunctionType(checker, nodeMember, memberType)) {
return;
}
context.report({
node: services.tsNodeToESTreeNodeMap.get(nodeMember),
messageId: 'voidReturnInheritedMethod',
data: { heritageTypeName: checker.typeToString(heritageType) },
});
}
function checkJSXAttribute(node) {
if (node.value == null ||
node.value.type !== utils_1.AST_NODE_TYPES.JSXExpressionContainer) {
return;
}
const expressionContainer = services.esTreeNodeToTSNodeMap.get(node.value);
const expression = services.esTreeNodeToTSNodeMap.get(node.value.expression);
const contextualType = checker.getContextualType(expressionContainer);
if (contextualType !== undefined &&
isVoidReturningFunctionType(checker, expressionContainer, contextualType) &&
returnsThenable(checker, expression)) {
context.report({
messageId: 'voidReturnAttribute',
node: node.value,
});
}
}
function checkSpread(node) {
const tsNode = services.esTreeNodeToTSNodeMap.get(node);
if (isSometimesThenable(checker, tsNode.expression)) {
context.report({
messageId: 'spread',
node: node.argument,
});
}
}
return {
...(checksConditionals ? conditionalChecks : {}),
...(checksVoidReturn ? voidReturnChecks : {}),
...(checksSpreads ? spreadChecks : {}),
};
},
});
function isSometimesThenable(checker, node) {
const type = checker.getTypeAtLocation(node);
for (const subType of tsutils.unionTypeParts(checker.getApparentType(type))) {
if (tsutils.isThenableType(checker, node, subType)) {
return true;
}
}
return false;
}
// Variation on the thenable check which requires all forms of the type (read:
// alternates in a union) to be thenable. Otherwise, you might be trying to
// check if something is defined or undefined and get caught because one of the
// branches is thenable.
function isAlwaysThenable(checker, node) {
const type = checker.getTypeAtLocation(node);
for (const subType of tsutils.unionTypeParts(checker.getApparentType(type))) {
const thenProp = subType.getProperty('then');
// If one of the alternates has no then property, it is not thenable in all
// cases.
if (thenProp === undefined) {
return false;
}
// We walk through each variation of the then property. Since we know it
// exists at this point, we just need at least one of the alternates to
// be of the right form to consider it thenable.
const thenType = checker.getTypeOfSymbolAtLocation(thenProp, node);
let hasThenableSignature = false;
for (const subType of tsutils.unionTypeParts(thenType)) {
for (const signature of subType.getCallSignatures()) {
if (signature.parameters.length !== 0 &&
isFunctionParam(checker, signature.parameters[0], node)) {
hasThenableSignature = true;
break;
}
}
// We only need to find one variant of the then property that has a
// function signature for it to be thenable.
if (hasThenableSignature) {
break;
}
}
// If no flavors of the then property are thenable, we don't consider the
// overall type to be thenable
if (!hasThenableSignature) {
return false;
}
}
// If all variants are considered thenable (i.e. haven't returned false), we
// consider the overall type thenable
return true;
}
function isFunctionParam(checker, param, node) {
const type = checker.getApparentType(checker.getTypeOfSymbolAtLocation(param, node));
for (const subType of tsutils.unionTypeParts(type)) {
if (subType.getCallSignatures().length !== 0) {
return true;
}
}
return false;
}
function checkThenableOrVoidArgument(checker, node, type, index, thenableReturnIndices, voidReturnIndices) {
if (isThenableReturningFunctionType(checker, node.expression, type)) {
thenableReturnIndices.add(index);
}
else if (isVoidReturningFunctionType(checker, node.expression, type) &&
// If a certain argument accepts both thenable and void returns,
// a promise-returning function is valid
!thenableReturnIndices.has(index)) {
voidReturnIndices.add(index);
}
const contextualType = checker.getContextualTypeForArgumentAtIndex(node, index);
if (contextualType !== type) {
checkThenableOrVoidArgument(checker, node, contextualType, index, thenableReturnIndices, voidReturnIndices);
}
}
// Get the positions of arguments which are void functions (and not also
// thenable functions). These are the candidates for the void-return check at
// the current call site.
// If the function parameters end with a 'rest' parameter, then we consider
// the array type parameter (e.g. '...args:Array<SomeType>') when determining
// if trailing arguments are candidates.
function voidFunctionArguments(checker, node) {
// 'new' can be used without any arguments, as in 'let b = new Object;'
// In this case, there are no argument positions to check, so return early.
if (!node.arguments) {
return new Set();
}
const thenableReturnIndices = new Set();
const voidReturnIndices = new Set();
const type = checker.getTypeAtLocation(node.expression);
// We can't use checker.getResolvedSignature because it prefers an early '() => void' over a later '() => Promise<void>'
// See https://github.com/microsoft/TypeScript/issues/48077
for (const subType of tsutils.unionTypeParts(type)) {
// Standard function calls and `new` have two different types of signatures
const signatures = ts.isCallExpression(node)
? subType.getCallSignatures()
: subType.getConstructSignatures();
for (const signature of signatures) {
for (const [index, parameter] of signature.parameters.entries()) {
const decl = parameter.valueDeclaration;
let type = checker.getTypeOfSymbolAtLocation(parameter, node.expression);
// If this is a array 'rest' parameter, check all of the argument indices
// from the current argument to the end.
if (decl && (0, util_1.isRestParameterDeclaration)(decl)) {
if (checker.isArrayType(type)) {
// Unwrap 'Array<MaybeVoidFunction>' to 'MaybeVoidFunction',
// so that we'll handle it in the same way as a non-rest
// 'param: MaybeVoidFunction'
type = checker.getTypeArguments(type)[0];
for (let i = index; i < node.arguments.length; i++) {
checkThenableOrVoidArgument(checker, node, type, i, thenableReturnIndices, voidReturnIndices);
}
}
else if (checker.isTupleType(type)) {
// Check each type in the tuple - for example, [boolean, () => void] would
// add the index of the second tuple parameter to 'voidReturnIndices'
const typeArgs = checker.getTypeArguments(type);
for (let i = index; i < node.arguments.length && i - index < typeArgs.length; i++) {
checkThenableOrVoidArgument(checker, node, typeArgs[i - index], i, thenableReturnIndices, voidReturnIndices);
}
}
}
else {
checkThenableOrVoidArgument(checker, node, type, index, thenableReturnIndices, voidReturnIndices);
}
}
}
}
for (const index of thenableReturnIndices) {
voidReturnIndices.delete(index);
}
return voidReturnIndices;
}
/**
* @returns Whether any call signature of the type has a thenable return type.
*/
function anySignatureIsThenableType(checker, node, type) {
for (const signature of type.getCallSignatures()) {
const returnType = signature.getReturnType();
if (tsutils.isThenableType(checker, node, returnType)) {
return true;
}
}
return false;
}
/**
* @returns Whether type is a thenable-returning function.
*/
function isThenableReturningFunctionType(checker, node, type) {
for (const subType of tsutils.unionTypeParts(type)) {
if (anySignatureIsThenableType(checker, node, subType)) {
return true;
}
}
return false;
}
/**
* @returns Whether type is a void-returning function.
*/
function isVoidReturningFunctionType(checker, node, type) {
let hadVoidReturn = false;
for (const subType of tsutils.unionTypeParts(type)) {
for (const signature of subType.getCallSignatures()) {
const returnType = signature.getReturnType();
// If a certain positional argument accepts both thenable and void returns,
// a promise-returning function is valid
if (tsutils.isThenableType(checker, node, returnType)) {
return false;
}
hadVoidReturn ||= tsutils.isTypeFlagSet(returnType, ts.TypeFlags.Void);
}
}
return hadVoidReturn;
}
/**
* @returns Whether expression is a function that returns a thenable.
*/
function returnsThenable(checker, node) {
const type = checker.getApparentType(checker.getTypeAtLocation(node));
return tsutils
.unionTypeParts(type)
.some(t => anySignatureIsThenableType(checker, node, t));
}
function getHeritageTypes(checker, tsNode) {
return tsNode.heritageClauses
?.flatMap(clause => clause.types)
.map(typeExpression => checker.getTypeAtLocation(typeExpression));
}
/**
* @returns The member with the given name in `type`, if it exists.
*/
function getMemberIfExists(type, memberName) {
const escapedMemberName = ts.escapeLeadingUnderscores(memberName);
const symbolMemberMatch = type.getSymbol()?.members?.get(escapedMemberName);
return (symbolMemberMatch ?? tsutils.getPropertyOfType(type, escapedMemberName));
}
function isStaticMember(node) {
return ((node.type === utils_1.AST_NODE_TYPES.MethodDefinition ||
node.type === utils_1.AST_NODE_TYPES.PropertyDefinition) &&
node.static);
}
//# sourceMappingURL=no-misused-promises.js.map