prefer-as-const.js
3.52 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
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
"use strict";
var __createBinding = (this && this.__createBinding) || (Object.create ? (function(o, m, k, k2) {
if (k2 === undefined) k2 = k;
Object.defineProperty(o, k2, { enumerable: true, get: function() { return m[k]; } });
}) : (function(o, m, k, k2) {
if (k2 === undefined) k2 = k;
o[k2] = m[k];
}));
var __setModuleDefault = (this && this.__setModuleDefault) || (Object.create ? (function(o, v) {
Object.defineProperty(o, "default", { enumerable: true, value: v });
}) : function(o, v) {
o["default"] = v;
});
var __importStar = (this && this.__importStar) || function (mod) {
if (mod && mod.__esModule) return mod;
var result = {};
if (mod != null) for (var k in mod) if (k !== "default" && Object.prototype.hasOwnProperty.call(mod, k)) __createBinding(result, mod, k);
__setModuleDefault(result, mod);
return result;
};
Object.defineProperty(exports, "__esModule", { value: true });
const experimental_utils_1 = require("@typescript-eslint/experimental-utils");
const util = __importStar(require("../util"));
exports.default = util.createRule({
name: 'prefer-as-const',
meta: {
type: 'suggestion',
docs: {
description: 'Prefer usage of `as const` over literal type',
category: 'Best Practices',
recommended: 'error',
suggestion: true,
},
fixable: 'code',
messages: {
preferConstAssertion: 'Expected a `const` instead of a literal type assertion.',
variableConstAssertion: 'Expected a `const` assertion instead of a literal type annotation.',
variableSuggest: 'You should use `as const` instead of type annotation.',
},
schema: [],
},
defaultOptions: [],
create(context) {
function compareTypes(valueNode, typeNode, canFix) {
if (valueNode.type === experimental_utils_1.AST_NODE_TYPES.Literal &&
typeNode.type === experimental_utils_1.AST_NODE_TYPES.TSLiteralType &&
'raw' in typeNode.literal &&
valueNode.raw === typeNode.literal.raw) {
if (canFix) {
context.report({
node: typeNode,
messageId: 'preferConstAssertion',
fix: fixer => fixer.replaceText(typeNode, 'const'),
});
}
else {
context.report({
node: typeNode,
messageId: 'variableConstAssertion',
suggest: [
{
messageId: 'variableSuggest',
fix: (fixer) => [
fixer.remove(typeNode.parent),
fixer.insertTextAfter(valueNode, ' as const'),
],
},
],
});
}
}
}
return {
TSAsExpression(node) {
compareTypes(node.expression, node.typeAnnotation, true);
},
TSTypeAssertion(node) {
compareTypes(node.expression, node.typeAnnotation, true);
},
VariableDeclarator(node) {
if (node.init && node.id.typeAnnotation) {
compareTypes(node.init, node.id.typeAnnotation.typeAnnotation, false);
}
},
};
},
});
//# sourceMappingURL=prefer-as-const.js.map