text: /**
   * @fileoverview Ensure that strings are quoted with double-quotes only
   * @author Raghav Dua <duaraghav8@gmail.com>
   */
  
  "use strict";
  
  /**
   * Determine whether the provided literal is in Hex Notation
   * @param {String} literal The literal to test for Hex Notation
   * @returns {Boolean}
   */
  function isHex(literal) {
      let reg = /^[0-9a-f]+$/i;
  
      //test for '0x' separately because hex notation should not be a part of the standard RegExp
      if (literal.slice(0, 2) !== "0x") {
          return false;
      }
  
      return reg.test(literal.slice(2));
  }
  
  module.exports = {
  
      meta: {
  
          docs: {
              recommended: true,
              type: "error",
              description: "Ensure that string are quoted with double-quotes only",
              replacedBy: ["quotes"]
          },
  
          schema: [],
          deprecated: true
  
      },
  
      create: function(context) {
  
          let doubleQuotesLiteralRegExp = /^\".*\"$/,
              sourceCode = context.getSourceCode();
  
          function inspectLiteral(emitted) {
              let node = emitted.node, nodeText = sourceCode.getText(node);
  
              if (emitted.exit ||
  				typeof node.value !== "string" ||
  				(nodeText [0] !== "'" && nodeText [0] !== "\"" && isHex(node.value))
              ) {
                  return;
              }
  
              if (!doubleQuotesLiteralRegExp.test(nodeText)) {
                  context.report({
                      node: node,
                      message: "'" + node.value + "': String Literals must be quoted with \"double quotes\" only."
                  });
              }
          }
  
          return {
              Literal: inspectLiteral
          };
  
      }
  
  };
  