56 lines
3.7 KiB
JavaScript
56 lines
3.7 KiB
JavaScript
|
"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 });
|
||
|
|
exports.Rule = void 0;
|
||
|
|
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;
|