no-misused-new.js
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"use strict";
var __createBinding = (this && this.__createBinding) || (Object.create ? (function(o, m, k, k2) {
if (k2 === undefined) k2 = k;
Object.defineProperty(o, k2, { enumerable: true, get: function() { return m[k]; } });
}) : (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 experimental_utils_1 = require("@typescript-eslint/experimental-utils");
const util = __importStar(require("../util"));
exports.default = util.createRule({
name: 'no-misused-new',
meta: {
type: 'problem',
docs: {
description: 'Enforce valid definition of `new` and `constructor`',
category: 'Best Practices',
recommended: 'error',
},
schema: [],
messages: {
errorMessageInterface: 'Interfaces cannot be constructed, only classes.',
errorMessageClass: 'Class cannot have method named `new`.',
},
},
defaultOptions: [],
create(context) {
/**
* @param node type to be inspected.
* @returns name of simple type or null
*/
function getTypeReferenceName(node) {
if (node) {
switch (node.type) {
case experimental_utils_1.AST_NODE_TYPES.TSTypeAnnotation:
return getTypeReferenceName(node.typeAnnotation);
case experimental_utils_1.AST_NODE_TYPES.TSTypeReference:
return getTypeReferenceName(node.typeName);
case experimental_utils_1.AST_NODE_TYPES.Identifier:
return node.name;
default:
break;
}
}
return null;
}
/**
* @param parent parent node.
* @param returnType type to be compared
*/
function isMatchingParentType(parent, returnType) {
if (parent &&
'id' in parent &&
parent.id &&
parent.id.type === experimental_utils_1.AST_NODE_TYPES.Identifier) {
return getTypeReferenceName(returnType) === parent.id.name;
}
return false;
}
return {
'TSInterfaceBody > TSConstructSignatureDeclaration'(node) {
if (isMatchingParentType(node.parent.parent, node.returnType)) {
// constructor
context.report({
node,
messageId: 'errorMessageInterface',
});
}
},
"TSMethodSignature[key.name='constructor']"(node) {
context.report({
node,
messageId: 'errorMessageInterface',
});
},
"ClassBody > MethodDefinition[key.name='new']"(node) {
if (node.value.type === experimental_utils_1.AST_NODE_TYPES.TSEmptyBodyFunctionExpression) {
if (node.parent &&
isMatchingParentType(node.parent.parent, node.value.returnType)) {
context.report({
node,
messageId: 'errorMessageClass',
});
}
}
},
};
},
});
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