/**
   * @fileoverview Rule to flag bitwise identifiers
   * @author Nicholas C. Zakas
   */
  
  "use strict";
  
  //------------------------------------------------------------------------------
  // Rule Definition
  //------------------------------------------------------------------------------
  
  module.exports = function(context) {
  
      var BITWISE_OPERATORS = [
          "^", "|", "&", "<<", ">>", ">>>",
          "^=", "|=", "&=", "<<=", ">>=", ">>>=",
          "~"
      ];
  
      /**
       * Reports an unexpected use of a bitwise operator.
       * @param   {ASTNode} node Node which contains the bitwise operator.
       * @returns {void}
       */
      function report(node) {
          context.report(node, "Unexpected use of '{{operator}}'.", { operator: node.operator });
      }
  
      /**
       * Checks if the given node has a bitwise operator.
       * @param   {ASTNode} node The node to check.
       * @returns {boolean} Whether or not the node has a bitwise operator.
       */
      function hasBitwiseOperator(node) {
          return BITWISE_OPERATORS.indexOf(node.operator) !== -1;
      }
  
      /**
       * Report if the given node contains a bitwise operator.
       * @param {ASTNode} node The node to check.
       * @returns {void}
       */
      function checkNodeForBitwiseOperator(node) {
          if (hasBitwiseOperator(node)) {
              report(node);
          }
      }
  
      return {
          "AssignmentExpression": checkNodeForBitwiseOperator,
          "BinaryExpression": checkNodeForBitwiseOperator,
          "UnaryExpression": checkNodeForBitwiseOperator
      };
  
  };
  
  module.exports.schema = [];