/**
   * @fileoverview A rule to disallow negated left operands of the `in` operator
   * @author Michael Ficarra
   */
  
  "use strict";
  
  //------------------------------------------------------------------------------
  // Rule Definition
  //------------------------------------------------------------------------------
  
  module.exports = function(context) {
  
      return {
  
          "BinaryExpression": function(node) {
              if (node.operator === "in" && node.left.type === "UnaryExpression" && node.left.operator === "!") {
                  context.report(node, "The `in` expression's left operand is negated");
              }
          }
      };
  
  };
  
  module.exports.schema = [];