/**
 * @fileoverview Rule to flag when deleting variables
 * @author Ilya Volodin
 */

'use strict';

//------------------------------------------------------------------------------
// Rule Definition
//------------------------------------------------------------------------------

/** @type {import('../types').Rule.RuleModule} */
module.exports = {
  meta: {
    type: 'suggestion',

    docs: {
      description: 'Disallow deleting variables',
      recommended: true,
      url: 'https://eslint.org/docs/latest/rules/no-delete-var',
    },

    schema: [],

    messages: {
      unexpected: 'Variables should not be deleted.',
    },
  },

  create(context) {
    return {
      UnaryExpression(node) {
        if (node.operator === 'delete' && node.argument.type === 'Identifier') {
          context.report({ node, messageId: 'unexpected' });
        }
      },
    };
  },
};