98 lines
3.7 KiB
JavaScript
98 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 });
|
|
var tslib_1 = require("tslib");
|
|
var utils = require("tsutils");
|
|
var ts = require("typescript");
|
|
var Lint = require("../index");
|
|
var Rule = (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-sparse-arrays",
|
|
description: "Forbids array literals to contain missing elements.",
|
|
rationale: "Missing elements are probably an accidentally duplicated comma.",
|
|
optionsDescription: "Not configurable.",
|
|
options: null,
|
|
optionExamples: [true],
|
|
type: "functionality",
|
|
typescriptOnly: false,
|
|
};
|
|
/* tslint:enable:object-literal-sort-keys */
|
|
Rule.FAILURE_STRING = "Array has a missing element.";
|
|
return Rule;
|
|
}(Lint.Rules.AbstractRule));
|
|
exports.Rule = Rule;
|
|
function walk(ctx) {
|
|
return ts.forEachChild(ctx.sourceFile, function cb(node) {
|
|
if (!utils.isArrayLiteralExpression(node)) {
|
|
if (utils.isBinaryExpression(node) && node.operatorToken.kind === ts.SyntaxKind.EqualsToken) {
|
|
// Ignore LHS of assignments.
|
|
traverseExpressionsInLHS(node.left, cb);
|
|
return cb(node.right);
|
|
}
|
|
else {
|
|
return ts.forEachChild(node, cb);
|
|
}
|
|
}
|
|
for (var _i = 0, _a = node.elements; _i < _a.length; _i++) {
|
|
var element = _a[_i];
|
|
if (utils.isOmittedExpression(element)) {
|
|
// Node has an empty range, so just use range starting at `element.pos`.
|
|
ctx.addFailureAt(element.pos, 1, Rule.FAILURE_STRING);
|
|
}
|
|
else {
|
|
ts.forEachChild(element, cb);
|
|
}
|
|
}
|
|
});
|
|
}
|
|
/** Traverse the LHS of an `=` expression, calling `cb` embedded default value, but ignoring binding patterns. */
|
|
function traverseExpressionsInLHS(node, cb) {
|
|
switch (node.kind) {
|
|
case ts.SyntaxKind.ParenthesizedExpression:
|
|
traverseExpressionsInLHS(node.expression, cb);
|
|
break;
|
|
case ts.SyntaxKind.ArrayLiteralExpression:
|
|
for (var _i = 0, _a = node.elements; _i < _a.length; _i++) {
|
|
var e = _a[_i];
|
|
traverseExpressionsInLHS(e, cb);
|
|
}
|
|
break;
|
|
case ts.SyntaxKind.ObjectLiteralExpression:
|
|
for (var _b = 0, _c = node.properties; _b < _c.length; _b++) {
|
|
var o = _c[_b];
|
|
traverseExpressionsInLHS(o, cb);
|
|
}
|
|
break;
|
|
case ts.SyntaxKind.BinaryExpression: {
|
|
var _d = node, left = _d.left, operatorToken = _d.operatorToken, right = _d.right;
|
|
if (operatorToken.kind === ts.SyntaxKind.EqualsToken) {
|
|
traverseExpressionsInLHS(left, cb);
|
|
cb(right);
|
|
}
|
|
}
|
|
}
|
|
}
|