79 lines
2.4 KiB
Plaintext
79 lines
2.4 KiB
Plaintext
/**
|
|
* @fileoverview Rule to disallow an empty pattern
|
|
* @author Alberto Rodríguez
|
|
*/
|
|
"use strict";
|
|
|
|
const astUtils = require("./utils/ast-utils");
|
|
|
|
//------------------------------------------------------------------------------
|
|
// Rule Definition
|
|
//------------------------------------------------------------------------------
|
|
|
|
/** @type {import('../shared/types').Rule} */
|
|
module.exports = {
|
|
meta: {
|
|
type: "problem",
|
|
|
|
docs: {
|
|
description: "Disallow empty destructuring patterns",
|
|
recommended: true,
|
|
url: "https://eslint.org/docs/latest/rules/no-empty-pattern"
|
|
},
|
|
|
|
schema: [
|
|
{
|
|
type: "object",
|
|
properties: {
|
|
allowObjectPatternsAsParameters: {
|
|
type: "boolean",
|
|
default: false
|
|
}
|
|
},
|
|
additionalProperties: false
|
|
}
|
|
],
|
|
|
|
messages: {
|
|
unexpected: "Unexpected empty {{type}} pattern."
|
|
}
|
|
},
|
|
|
|
create(context) {
|
|
const options = context.options[0] || {},
|
|
allowObjectPatternsAsParameters = options.allowObjectPatternsAsParameters || false;
|
|
|
|
return {
|
|
ObjectPattern(node) {
|
|
|
|
if (node.properties.length > 0) {
|
|
return;
|
|
}
|
|
|
|
// Allow {} and {} = {} empty object patterns as parameters when allowObjectPatternsAsParameters is true
|
|
if (
|
|
allowObjectPatternsAsParameters &&
|
|
(
|
|
astUtils.isFunction(node.parent) ||
|
|
(
|
|
node.parent.type === "AssignmentPattern" &&
|
|
astUtils.isFunction(node.parent.parent) &&
|
|
node.parent.right.type === "ObjectExpression" &&
|
|
node.parent.right.properties.length === 0
|
|
)
|
|
)
|
|
) {
|
|
return;
|
|
}
|
|
|
|
context.report({ node, messageId: "unexpected", data: { type: "object" } });
|
|
},
|
|
ArrayPattern(node) {
|
|
if (node.elements.length === 0) {
|
|
context.report({ node, messageId: "unexpected", data: { type: "array" } });
|
|
}
|
|
}
|
|
};
|
|
}
|
|
};
|