--- /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 noStringThrowRule_examples_1 = require("./code-examples/noStringThrowRule.examples");
+var Rule = /** @class */ (function (_super) {
+ tslib_1.__extends(Rule, _super);
+ function Rule() {
+ return _super !== null && _super.apply(this, arguments) || this;
+ }
+ Rule.prototype.apply = function (sourceFile) {
+ return this.applyWithFunction(sourceFile, walk);
+ };
+ /* tslint:disable:object-literal-sort-keys */
+ Rule.metadata = {
+ ruleName: "no-string-throw",
+ description: "Flags throwing plain strings or concatenations of strings.",
+ hasFix: true,
+ options: null,
+ optionExamples: [true],
+ optionsDescription: "Not configurable.",
+ rationale: Lint.Utils.dedent(templateObject_1 || (templateObject_1 = tslib_1.__makeTemplateObject(["\n Example \u2013 Doing it right\n\n ```ts\n // throwing an Error from typical function, whether sync or async\n if (!productToAdd) {\n throw new Error(\"How can I add new product when no value provided?\");\n }\n ```\n\n Example \u2013 Anti Pattern\n\n ```ts\n // throwing a string lacks any stack trace information and other important data properties\n if (!productToAdd) {\n throw (\"How can I add new product when no value provided?\");\n }\n ```\n\n Only Error objects contain a `.stack` member equivalent to the current stack trace.\n Primitives such as strings do not.\n "], ["\n Example \u2013 Doing it right\n\n \\`\\`\\`ts\n // throwing an Error from typical function, whether sync or async\n if (!productToAdd) {\n throw new Error(\"How can I add new product when no value provided?\");\n }\n \\`\\`\\`\n\n Example \u2013 Anti Pattern\n\n \\`\\`\\`ts\n // throwing a string lacks any stack trace information and other important data properties\n if (!productToAdd) {\n throw (\"How can I add new product when no value provided?\");\n }\n \\`\\`\\`\n\n Only Error objects contain a \\`.stack\\` member equivalent to the current stack trace.\n Primitives such as strings do not.\n "]))),
+ codeExamples: noStringThrowRule_examples_1.codeExamples,
+ type: "functionality",
+ typescriptOnly: false,
+ };
+ /* tslint:enable:object-literal-sort-keys */
+ Rule.FAILURE_STRING = "Throwing plain strings (not instances of Error) gives no stack traces";
+ return Rule;
+}(Lint.Rules.AbstractRule));
+exports.Rule = Rule;
+function walk(ctx) {
+ var sourceFile = ctx.sourceFile;
+ return ts.forEachChild(ctx.sourceFile, function cb(node) {
+ if (tsutils_1.isThrowStatement(node)) {
+ var expression = node.expression;
+ if (expression !== undefined && isString(expression)) {
+ // To prevent this fix from creating invalid syntax, we must ensure that the "throw"
+ // token is succeeded by a space if no other characters precede the string literal.
+ var offset = expression.getStart() - node.getStart();
+ var numCharactersBetweenTokens = offset - "throw".length;
+ var newError = numCharactersBetweenTokens === 0 ? " new Error(" : "new Error(";
+ ctx.addFailureAtNode(node, Rule.FAILURE_STRING, [
+ Lint.Replacement.appendText(expression.getStart(sourceFile), newError),
+ Lint.Replacement.appendText(expression.getEnd(), ")"),
+ ]);
+ }
+ }
+ return ts.forEachChild(node, cb);
+ });
+}
+function isString(node) {
+ switch (node.kind) {
+ case ts.SyntaxKind.StringLiteral:
+ case ts.SyntaxKind.NoSubstitutionTemplateLiteral:
+ case ts.SyntaxKind.TemplateExpression:
+ return true;
+ case ts.SyntaxKind.BinaryExpression: {
+ var _a = node, operatorToken = _a.operatorToken, left = _a.left, right = _a.right;
+ return (operatorToken.kind === ts.SyntaxKind.PlusToken &&
+ (isString(left) || isString(right)));
+ }
+ case ts.SyntaxKind.ParenthesizedExpression:
+ return isString(node.expression);
+ default:
+ return false;
+ }
+}
+var templateObject_1;