nl_tokens: 对array字面量求值，比如 [ 1 2 ] = > [ 1 2 ] ， [ 1 .. 5 ] = > [ 1 2 3 4 5 ]
pl_tokens: function ( literal ) { var ret = [ ] ; if ( literal . isRange ) { var begin = literal . value [ 0 ] ; if ( begin . type === 'references' ) { begin = this . getReferences ( begin ) ; } var end = literal . value [ 1 ] ; if ( end . type === 'references' ) { <mask> = this . getReferences ( end ) ; } end = parseInt ( end , 10 ) ; begin = parseInt ( begin , 10 ) ; var i ; if ( ! isNaN ( begin ) && ! isNaN ( end ) ) { if ( begin < end ) { for ( i = begin ; i <= end ; i ++ ) ret . push ( i ) ; } else { for ( i = begin ; i >= end ; i -- ) ret . push ( i ) ; } } } else { utils . forEach ( literal . value , function ( exp ) { ret . push ( this . getLiteral ( exp ) ) ; } , this ) ; } return ret ; }