892a62f4e5
To be followed by tests and `npm run build`, obviously! Reviewed-on: #1 Co-authored-by: Jack Jackson <scubbojj@gmail.com> Co-committed-by: Jack Jackson <scubbojj@gmail.com>
58 lines
1.6 KiB
JavaScript
58 lines
1.6 KiB
JavaScript
/**
|
|
* @fileoverview A rule to disallow negated left operands of the `in` operator
|
|
* @author Michael Ficarra
|
|
* @deprecated in ESLint v3.3.0
|
|
*/
|
|
|
|
"use strict";
|
|
|
|
//------------------------------------------------------------------------------
|
|
// Rule Definition
|
|
//------------------------------------------------------------------------------
|
|
|
|
/** @type {import('../shared/types').Rule} */
|
|
module.exports = {
|
|
meta: {
|
|
type: "problem",
|
|
|
|
docs: {
|
|
description: "Disallow negating the left operand in `in` expressions",
|
|
recommended: false,
|
|
url: "https://eslint.org/docs/latest/rules/no-negated-in-lhs"
|
|
},
|
|
|
|
deprecated: {
|
|
message: "Renamed rule",
|
|
url: "https://eslint.org/blog/2016/08/eslint-v3.3.0-released/#deprecated-rules",
|
|
deprecatedSince: "3.3.0",
|
|
availableUntil: null,
|
|
replacedBy: [
|
|
{
|
|
rule: {
|
|
name: "no-unsafe-negation",
|
|
url: "https://eslint.org/docs/rules/no-unsafe-negation"
|
|
}
|
|
}
|
|
]
|
|
},
|
|
schema: [],
|
|
|
|
messages: {
|
|
negatedLHS: "The 'in' expression's left operand is negated."
|
|
}
|
|
},
|
|
|
|
create(context) {
|
|
|
|
return {
|
|
|
|
BinaryExpression(node) {
|
|
if (node.operator === "in" && node.left.type === "UnaryExpression" && node.left.operator === "!") {
|
|
context.report({ node, messageId: "negatedLHS" });
|
|
}
|
|
}
|
|
};
|
|
|
|
}
|
|
};
|