text: /**
   * Original by Samuel Flores
   *
   * Adds the following new token classes:
   * 		constant, builtin, variable, symbol, regex
   */
  Prism.languages.ruby = Prism.languages.extend('clike', {
  	'comment': /#(?!\{[^\r\n]*?\})[^\r\n]*(\r?\n|$)/,
  	'keyword': /\b(alias|and|BEGIN|begin|break|case|class|def|define_method|defined|do|each|else|elsif|END|end|ensure|false|for|if|in|module|new|next|nil|not|or|raise|redo|require|rescue|retry|return|self|super|then|throw|true|undef|unless|until|when|while|yield)\b/,
  	'builtin': /\b(Array|Bignum|Binding|Class|Continuation|Dir|Exception|FalseClass|File|Stat|File|Fixnum|Fload|Hash|Integer|IO|MatchData|Method|Module|NilClass|Numeric|Object|Proc|Range|Regexp|String|Struct|TMS|Symbol|ThreadGroup|Thread|Time|TrueClass)\b/,
  	'constant': /\b[A-Z][a-zA-Z_0-9]*[?!]?\b/
  });
  
  Prism.languages.insertBefore('ruby', 'keyword', {
  	'regex': {
  		pattern: /(^|[^/])\/(?!\/)(\[.+?]|\\.|[^/\r\n])+\/[gim]{0,3}(?=\s*($|[\r\n,.;})]))/,
  		lookbehind: true
  	},
  	'variable': /[@$]+\b[a-zA-Z_][a-zA-Z_0-9]*[?!]?\b/,
  	'symbol': /:\b[a-zA-Z_][a-zA-Z_0-9]*[?!]?\b/
  });
  
  Prism.languages.ruby.string = {
  	pattern: /("|')(#\{[^}]+\}|\\\n|\\?.)*?\1/,
  	inside: {
  		'interpolation': {
  			pattern: /#\{[^}]+\}/,
  			inside: {
  				'delimiter': {
  					pattern: /^#\{|\}$/,
  					alias: 'tag'
  				},
  				rest: Prism.util.clone(Prism.languages.ruby)
  			}
  		}
  	}
  };
  