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"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");
// with due reference to https://github.com/Microsoft/TypeScript/blob/7813121c4d77e50aad0eed3152ef1f1156c7b574/scripts/tslint/noNullRule.ts
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: "no-null-keyword",
description: "Disallows use of the `null` keyword literal.",
rationale: (_a = ["\n Instead of having the dual concepts of `null` and`undefined` in a codebase,\n this rule ensures that only `undefined` is used."], _a.raw = ["\n Instead of having the dual concepts of \\`null\\` and\\`undefined\\` in a codebase,\n this rule ensures that only \\`undefined\\` is used."], Lint.Utils.dedent(_a)),
optionsDescription: "Not configurable.",
options: null,
optionExamples: [true],
type: "functionality",
typescriptOnly: false,
hasFix: true,
};
/* tslint:enable:object-literal-sort-keys */
Rule.FAILURE_STRING = "Use 'undefined' instead of 'null'";
return Rule;
}(Lint.Rules.AbstractRule));
exports.Rule = Rule;
function walk(ctx) {
return ts.forEachChild(ctx.sourceFile, cb);
function cb(node) {
if (tsutils_1.isTypeNodeKind(node.kind)) {
return; // skip type nodes
}
if (node.kind !== ts.SyntaxKind.NullKeyword) {
return ts.forEachChild(node, cb);
}
var parent = node.parent;
var eq;
if (tsutils_1.isBinaryExpression(parent)) {
eq = Lint.getEqualsKind(parent.operatorToken);
}
if (eq === undefined) {
ctx.addFailureAtNode(node, Rule.FAILURE_STRING);
}
else if (!eq.isStrict) {
ctx.addFailureAtNode(node, Rule.FAILURE_STRING, Lint.Replacement.replaceNode(node, "undefined", ctx.sourceFile));
}
}
}
var _a;
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