--- /dev/null
+"use strict";
+/**
+ * @license
+ * Copyright 2013 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.apply = function (sourceFile) {
+ return this.applyWithFunction(sourceFile, walk);
+ };
+ /* tslint:disable:object-literal-sort-keys */
+ Rule.metadata = {
+ ruleName: "interface-over-type-literal",
+ description: "Prefer an interface declaration over a type literal (`type T = { ... }`)",
+ rationale: "Interfaces are generally preferred over type literals because interfaces can be implemented, extended and merged.",
+ optionsDescription: "Not configurable.",
+ options: null,
+ optionExamples: [true],
+ type: "style",
+ typescriptOnly: true,
+ hasFix: true,
+ };
+ /* tslint:enable:object-literal-sort-keys */
+ Rule.FAILURE_STRING = "Use an interface instead of a type literal.";
+ return Rule;
+}(Lint.Rules.AbstractRule));
+exports.Rule = Rule;
+function walk(ctx) {
+ return ts.forEachChild(ctx.sourceFile, function cb(node) {
+ if (tsutils_1.isTypeAliasDeclaration(node) && tsutils_1.isTypeLiteralNode(node.type)) {
+ var typeKeyword = tsutils_1.getChildOfKind(node, ts.SyntaxKind.TypeKeyword, ctx.sourceFile);
+ var fix = [
+ // "type" -> "interface"
+ new Lint.Replacement(typeKeyword.end - 4, 4, "interface"),
+ // remove "=" and trivia up to the open curly brace of the type literal
+ Lint.Replacement.deleteFromTo(node.type.pos - 1, node.type.members.pos - 1),
+ ];
+ // remove trailing semicolon if exists
+ if (ctx.sourceFile.text[node.end - 1] === ";") {
+ fix.push(Lint.Replacement.deleteText(node.end - 1, 1));
+ }
+ ctx.addFailureAtNode(node.name, Rule.FAILURE_STRING, fix);
+ }
+ return ts.forEachChild(node, cb);
+ });
+}