arrowParensRule.js
2.3 KB
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
"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 Rule = (function (_super) {
__extends(Rule, _super);
function Rule() {
_super.apply(this, arguments);
}
Rule.prototype.apply = function (sourceFile) {
var newParensWalker = new ArrowParensWalker(sourceFile, this.getOptions());
return this.applyWithWalker(newParensWalker);
};
Rule.metadata = {
ruleName: "arrow-parens",
description: "Requires parentheses around the parameters of arrow function definitions.",
rationale: "Maintains stylistic consistency with other arrow function definitions.",
optionsDescription: "Not configurable.",
options: null,
optionExamples: ["true"],
type: "style",
};
Rule.FAILURE_STRING = "Parentheses are required around the parameters of an arrow function definition";
return Rule;
}(Lint.Rules.AbstractRule));
exports.Rule = Rule;
var ArrowParensWalker = (function (_super) {
__extends(ArrowParensWalker, _super);
function ArrowParensWalker() {
_super.apply(this, arguments);
}
ArrowParensWalker.prototype.visitArrowFunction = function (node) {
if (node.parameters.length === 1) {
var parameter = node.parameters[0];
var text = parameter.getText();
var firstToken = node.getFirstToken();
var lastToken = node.getChildAt(2);
var width = text.length;
var position = parameter.getStart();
var isGenerics = false;
if (firstToken.kind === ts.SyntaxKind.LessThanToken) {
isGenerics = true;
}
if ((firstToken.kind !== ts.SyntaxKind.OpenParenToken || lastToken.kind !== ts.SyntaxKind.CloseParenToken)
&& !isGenerics && node.flags !== ts.NodeFlags.Async) {
this.addFailure(this.createFailure(position, width, Rule.FAILURE_STRING));
}
}
_super.prototype.visitArrowFunction.call(this, node);
};
return ArrowParensWalker;
}(Lint.RuleWalker));