--- /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 BAN_SINGLE_ARG_PARENS = "ban-single-arg-parens";
+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, {
+ banSingleArgParens: this.ruleArguments.indexOf(BAN_SINGLE_ARG_PARENS) !== -1,
+ });
+ };
+ /* tslint:disable:object-literal-sort-keys */
+ Rule.metadata = {
+ ruleName: "arrow-parens",
+ description: "Requires parentheses around the parameters of arrow function definitions.",
+ hasFix: true,
+ rationale: "Maintains stylistic consistency with other arrow function definitions.",
+ optionsDescription: Lint.Utils.dedent(templateObject_1 || (templateObject_1 = tslib_1.__makeTemplateObject(["\n If `", "` is specified, then arrow functions with one parameter\n must not have parentheses if removing them is allowed by TypeScript."], ["\n If \\`", "\\` is specified, then arrow functions with one parameter\n must not have parentheses if removing them is allowed by TypeScript."])), BAN_SINGLE_ARG_PARENS),
+ options: {
+ type: "string",
+ enum: [BAN_SINGLE_ARG_PARENS],
+ },
+ optionExamples: [true, [true, BAN_SINGLE_ARG_PARENS]],
+ type: "formatting",
+ typescriptOnly: false,
+ };
+ /* tslint:enable:object-literal-sort-keys */
+ Rule.FAILURE_STRING_MISSING = "Parentheses are required around the parameters of an arrow function definition";
+ Rule.FAILURE_STRING_EXISTS = "Parentheses are prohibited around the parameter in this single parameter arrow function";
+ return Rule;
+}(Lint.Rules.AbstractRule));
+exports.Rule = Rule;
+function walk(ctx) {
+ function cb(node) {
+ if (tsutils_1.isArrowFunction(node) && parensAreOptional(node)) {
+ var openParen = tsutils_1.getChildOfKind(node, ts.SyntaxKind.OpenParenToken);
+ if (openParen === undefined) {
+ if (!ctx.options.banSingleArgParens) {
+ var parameter = node.parameters[0];
+ var start = parameter.getStart(ctx.sourceFile);
+ var end = parameter.end;
+ ctx.addFailure(start, end, Rule.FAILURE_STRING_MISSING, [
+ Lint.Replacement.appendText(start, "("),
+ Lint.Replacement.appendText(end, ")"),
+ ]);
+ }
+ }
+ else if (ctx.options.banSingleArgParens) {
+ var closeParen = tsutils_1.getChildOfKind(node, ts.SyntaxKind.CloseParenToken);
+ var charBeforeOpenParen = ctx.sourceFile.text.substring(openParen.pos - 1, openParen.pos);
+ var replaceValue = charBeforeOpenParen.match(/[a-z]/i) !== null ? " " : "";
+ ctx.addFailureAtNode(node.parameters[0], Rule.FAILURE_STRING_EXISTS, [
+ Lint.Replacement.replaceFromTo(openParen.pos, node.parameters[0].getStart(ctx.sourceFile), replaceValue),
+ Lint.Replacement.deleteFromTo(node.parameters[0].end, closeParen.end),
+ ]);
+ }
+ }
+ return ts.forEachChild(node, cb);
+ }
+ return ts.forEachChild(ctx.sourceFile, cb);
+}
+function parensAreOptional(node) {
+ return (node.parameters.length === 1 &&
+ node.typeParameters === undefined &&
+ node.type === undefined &&
+ isSimpleParameter(node.parameters[0]));
+}
+function isSimpleParameter(parameter) {
+ return (parameter.name.kind === ts.SyntaxKind.Identifier &&
+ parameter.dotDotDotToken === undefined &&
+ parameter.initializer === undefined &&
+ parameter.questionToken === undefined &&
+ parameter.type === undefined);
+}
+var templateObject_1;