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"use strict";
/**
* @license
* Copyright 2017 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 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-non-null-assertion",
description: "Disallows non-null assertions using the `!` postfix operator.",
rationale: Lint.Utils.dedent(templateObject_1 || (templateObject_1 = tslib_1.__makeTemplateObject(["\n Using non-null assertion cancels the benefits of the strict null checking mode.\n\n Instead of assuming objects exist:\n\n ```\n function foo(instance: MyClass | undefined) {\n instance!.doWork();\n }\n ```\n\n Either inform the strict type system that the object must exist:\n\n ```\n function foo(instance: MyClass) {\n instance.doWork();\n }\n ```\n\n Or verify that the instance exists, which will inform the type checker:\n\n ```\n function foo(instance: MyClass | undefined) {\n if (instance !== undefined) {\n instance.doWork();\n }\n }\n ```\n "], ["\n Using non-null assertion cancels the benefits of the strict null checking mode.\n\n Instead of assuming objects exist:\n\n \\`\\`\\`\n function foo(instance: MyClass | undefined) {\n instance!.doWork();\n }\n \\`\\`\\`\n\n Either inform the strict type system that the object must exist:\n\n \\`\\`\\`\n function foo(instance: MyClass) {\n instance.doWork();\n }\n \\`\\`\\`\n\n Or verify that the instance exists, which will inform the type checker:\n\n \\`\\`\\`\n function foo(instance: MyClass | undefined) {\n if (instance !== undefined) {\n instance.doWork();\n }\n }\n \\`\\`\\`\n "]))),
optionsDescription: "Not configurable.",
options: null,
optionExamples: [true],
type: "typescript",
typescriptOnly: true,
};
/* tslint:enable:object-literal-sort-keys */
Rule.FAILURE_STRING = "Forbidden non null assertion";
return Rule;
}(Lint.Rules.AbstractRule));
exports.Rule = Rule;
function walk(ctx) {
return ts.forEachChild(ctx.sourceFile, function cb(node) {
if (node.kind === ts.SyntaxKind.NonNullExpression) {
ctx.addFailureAtNode(node, Rule.FAILURE_STRING);
}
return ts.forEachChild(node, cb);
});
}
var templateObject_1;
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