oneVariablePerDeclarationRule.js
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"use strict";
var __extends = (this && this.__extends) || function (d, b) {
for (var p in b) if (b.hasOwnProperty(p)) d[p] = b[p];
function __() { this.constructor = d; }
d.prototype = b === null ? Object.create(b) : (__.prototype = b.prototype, new __());
};
var ts = require("typescript");
var Lint = require("../lint");
var OPTION_IGNORE_FOR_LOOP = "ignore-for-loop";
var Rule = (function (_super) {
__extends(Rule, _super);
function Rule() {
_super.apply(this, arguments);
}
Rule.prototype.apply = function (sourceFile) {
var oneVarWalker = new OneVariablePerDeclarationWalker(sourceFile, this.getOptions());
return this.applyWithWalker(oneVarWalker);
};
Rule.metadata = {
ruleName: "one-variable-per-declaration",
description: "Disallows multiple variable definitions in the same declaration statement.",
optionsDescription: (_a = ["\n One argument may be optionally provided:\n\n * `", "` allows multiple variable definitions in a for loop declaration."], _a.raw = ["\n One argument may be optionally provided:\n\n * \\`", "\\` allows multiple variable definitions in a for loop declaration."], Lint.Utils.dedent(_a, OPTION_IGNORE_FOR_LOOP)),
options: {
type: "array",
items: {
type: "string",
enum: [OPTION_IGNORE_FOR_LOOP],
},
minLength: 0,
maxLength: 1,
},
optionExamples: ["true", ("[true, \"" + OPTION_IGNORE_FOR_LOOP + "\"]")],
type: "style",
};
Rule.FAILURE_STRING = "Multiple variable declarations in the same statement are forbidden";
return Rule;
var _a;
}(Lint.Rules.AbstractRule));
exports.Rule = Rule;
var OneVariablePerDeclarationWalker = (function (_super) {
__extends(OneVariablePerDeclarationWalker, _super);
function OneVariablePerDeclarationWalker() {
_super.apply(this, arguments);
}
OneVariablePerDeclarationWalker.prototype.visitVariableStatement = function (node) {
var declarationList = node.declarationList;
if (declarationList.declarations.length > 1) {
this.addFailure(this.createFailure(node.getStart(), node.getWidth(), Rule.FAILURE_STRING));
}
_super.prototype.visitVariableStatement.call(this, node);
};
OneVariablePerDeclarationWalker.prototype.visitForStatement = function (node) {
var initializer = node.initializer;
var shouldIgnoreForLoop = this.hasOption(OPTION_IGNORE_FOR_LOOP);
if (!shouldIgnoreForLoop
&& initializer != null
&& initializer.kind === ts.SyntaxKind.VariableDeclarationList
&& initializer.declarations.length > 1) {
this.addFailure(this.createFailure(initializer.getStart(), initializer.getWidth(), Rule.FAILURE_STRING));
}
_super.prototype.visitForStatement.call(this, node);
};
return OneVariablePerDeclarationWalker;
}(Lint.RuleWalker));