+++ /dev/null
-"use strict";
-/**
- * @license
- * Copyright 2018 Palantir Technologies, Inc.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- * http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-Object.defineProperty(exports, "__esModule", { value: true });
-var tslib_1 = require("tslib");
-var tsutils_1 = require("tsutils");
-var ts = require("typescript");
-var Lint = require("../index");
-var Rule = /** @class */ (function (_super) {
- tslib_1.__extends(Rule, _super);
- function Rule() {
- return _super !== null && _super.apply(this, arguments) || this;
- }
- Rule.prototype.applyWithProgram = function (sourceFile, program) {
- return this.applyWithFunction(sourceFile, walk, undefined, program.getTypeChecker());
- };
- /* tslint:disable:object-literal-sort-keys */
- Rule.metadata = {
- ruleName: "restrict-plus-operands",
- description: "When adding two variables, operands must both be of type number or of type string.",
- optionsDescription: "Not configurable.",
- options: null,
- optionExamples: [true],
- type: "functionality",
- typescriptOnly: false,
- requiresTypeInfo: true,
- };
- /* tslint:enable:object-literal-sort-keys */
- Rule.INVALID_TYPES_ERROR = "Operands of '+' operation must either be both strings or both numbers or both bigints";
- Rule.SUGGEST_TEMPLATE_LITERALS = ". Consider using template literals.";
- return Rule;
-}(Lint.Rules.TypedRule));
-exports.Rule = Rule;
-function walk(ctx, tc) {
- return ts.forEachChild(ctx.sourceFile, function cb(node) {
- if (tsutils_1.isBinaryExpression(node) && node.operatorToken.kind === ts.SyntaxKind.PlusToken) {
- var leftType = tc.getTypeAtLocation(node.left);
- var leftTypeStr = getBaseTypeOfLiteralType(leftType);
- var rightType = tc.getTypeAtLocation(node.right);
- var rightTypeStr = getBaseTypeOfLiteralType(rightType);
- if (leftTypeStr === "invalid" ||
- rightTypeStr === "invalid" ||
- leftTypeStr !== rightTypeStr) {
- var actualTypes = ", but found " + getTypeString(tc, node.left, leftType) + " + " + getTypeString(tc, node.right, rightType);
- var message = Rule.INVALID_TYPES_ERROR + actualTypes;
- if (leftTypeStr === "string" || rightTypeStr === "string") {
- message += Rule.SUGGEST_TEMPLATE_LITERALS;
- }
- return ctx.addFailureAtNode(node, message);
- }
- }
- return ts.forEachChild(node, cb);
- });
-}
-function getTypeString(tc, node, type) {
- var typeString = tc.typeToString(type, node);
- if (typeString === "undefined[]" &&
- ts.isArrayLiteralExpression(node) &&
- node.elements.length === 0) {
- // Special case literal "[]" arrays that would otherwise be emitted as undefined[].
- return "[]";
- }
- return typeString;
-}
-function getBaseTypeOfLiteralType(type) {
- if (tsutils_1.isTypeFlagSet(type, ts.TypeFlags.StringLiteral) ||
- tsutils_1.isTypeFlagSet(type, ts.TypeFlags.String)) {
- return "string";
- }
- else if (tsutils_1.isTypeFlagSet(type, ts.TypeFlags.NumberLiteral) ||
- tsutils_1.isTypeFlagSet(type, ts.TypeFlags.Number)) {
- return "number";
- }
- else if (tsutils_1.isTypeFlagSet(type, ts.TypeFlags.BigIntLiteral) ||
- tsutils_1.isTypeFlagSet(type, ts.TypeFlags.BigInt)) {
- return "bigint";
- }
- else if (tsutils_1.isUnionType(type) && !tsutils_1.isTypeFlagSet(type, ts.TypeFlags.Enum)) {
- var types = type.types.map(getBaseTypeOfLiteralType);
- return allSame(types) ? types[0] : "invalid";
- }
- else if (tsutils_1.isTypeFlagSet(type, ts.TypeFlags.EnumLiteral)) {
- // Compatibility for TypeScript pre-2.4, which used EnumLiteralType instead of LiteralType
- getBaseTypeOfLiteralType(type.baseType);
- }
- return "invalid";
-}
-function allSame(array) {
- return array.every(function (value) { return value === array[0]; });
-}