eslint-plugin-sonarjs
Version:
SonarJS rules for ESLint
108 lines (107 loc) • 4.66 kB
JavaScript
;
/*
* SonarQube JavaScript Plugin
* Copyright (C) 2011-2025 SonarSource SA
* mailto:info AT sonarsource DOT com
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the Sonar Source-Available License Version 1, as published by SonarSource SA.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
* See the Sonar Source-Available License for more details.
*
* You should have received a copy of the Sonar Source-Available License
* along with this program; if not, see https://sonarsource.com/license/ssal/
*/
// https://sonarsource.github.io/rspec/#/rspec/S3757/javascript
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 () {
var ownKeys = function(o) {
ownKeys = Object.getOwnPropertyNames || function (o) {
var ar = [];
for (var k in o) if (Object.prototype.hasOwnProperty.call(o, k)) ar[ar.length] = k;
return ar;
};
return ownKeys(o);
};
return function (mod) {
if (mod && mod.__esModule) return mod;
var result = {};
if (mod != null) for (var k = ownKeys(mod), i = 0; i < k.length; i++) if (k[i] !== "default") __createBinding(result, mod, k[i]);
__setModuleDefault(result, mod);
return result;
};
})();
var __importDefault = (this && this.__importDefault) || function (mod) {
return (mod && mod.__esModule) ? mod : { "default": mod };
};
Object.defineProperty(exports, "__esModule", { value: true });
exports.rule = void 0;
const typescript_1 = __importDefault(require("typescript"));
const index_js_1 = require("../helpers/index.js");
const meta = __importStar(require("./generated-meta.js"));
const BINARY_OPERATORS = ['/', '*', '%', '-', '-=', '*=', '/=', '%='];
const UNARY_OPERATORS = ['++', '--', '+', '-'];
exports.rule = {
meta: (0, index_js_1.generateMeta)(meta, {
messages: {
noEvaluatedNaN: 'Change the expression which uses this operand so that it can\'t evaluate to "NaN" (Not a Number).',
},
}),
create(context) {
const services = context.sourceCode.parserServices;
if (!(0, index_js_1.isRequiredParserServices)(services)) {
return {};
}
function isObjectType(...types) {
return types.some(t => !!(t.getFlags() & typescript_1.default.TypeFlags.Object) && !isDate(t) && t.symbol?.name !== 'Number');
}
function isDate(type) {
const { typeToString } = services.program.getTypeChecker();
return typeToString(type) === 'Date';
}
return {
'BinaryExpression, AssignmentExpression': (node) => {
const expression = node;
if (!BINARY_OPERATORS.includes(expression.operator)) {
return;
}
const leftType = (0, index_js_1.getTypeFromTreeNode)(expression.left, services);
const rightType = (0, index_js_1.getTypeFromTreeNode)(expression.right, services);
if (isObjectType(leftType)) {
context.report({ node: expression.left, messageId: 'noEvaluatedNaN' });
}
if (isObjectType(rightType)) {
context.report({ node: expression.right, messageId: 'noEvaluatedNaN' });
}
},
'UnaryExpression, UpdateExpression': (node) => {
const expr = node;
if (!UNARY_OPERATORS.includes(expr.operator)) {
return;
}
const argType = (0, index_js_1.getTypeFromTreeNode)(expr.argument, services);
if (isObjectType(argType)) {
context.report({ node, messageId: 'noEvaluatedNaN' });
}
},
};
},
};