/**
   * @fileoverview Rule to flag octal escape sequences in string literals.
   * @author Ian Christian Myers
   */
  
  "use strict";
  
  //------------------------------------------------------------------------------
  // Rule Definition
  //------------------------------------------------------------------------------
  
  module.exports = function(context) {
  
      return {
  
          "Literal": function(node) {
              if (typeof node.value !== "string") {
                  return;
              }
  
              var match = node.raw.match(/^([^\\]|\\[^0-7])*\\([0-3][0-7]{1,2}|[4-7][0-7]|[0-7])/),
                  octalDigit;
  
              if (match) {
                  octalDigit = match[2];
  
                  // \0 is actually not considered an octal
                  if (match[2] !== "0" || typeof match[3] !== "undefined") {
                      context.report(node, "Don't use octal: '\\{{octalDigit}}'. Use '\\u....' instead.",
                              { octalDigit: octalDigit });
                  }
              }
          }
  
      };
  
  };
  
  module.exports.schema = [];