/**
 * @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('../types').Rule.RuleModule} */
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' });
        }
      },
    };
  },
};