nl_tokens: Create a lexer for the given variable type .
pl_tokens: function ( type ) { var cached = this . regex . createVariable ( type ) ; var file = this . file ; var lexer = this ; var fn = this . lexers [ type ] = function ( ) { var <mask> = lexer . position ( ) ; var m = lexer . match ( cached . strict ) ; if ( ! m ) return ; var parent = this . prev ( ) ; var node = pos ( { type : type , known : utils . has ( lexer . known . tags , type ) , val : m [ 0 ] . trim ( ) } ) ; parent . known = node . known ; var nodes = parent . nodes ; Object . defineProperty ( file . ast . variables , type , { configurable : true , set : function ( val ) { nodes = val ; } , get : function ( ) { return nodes ; } } ) ; Object . defineProperty ( parent , 'nodes' , { configurable : true , set : function ( val ) { nodes = val ; } , get : function ( ) { return nodes ; } } ) ; utils . define ( node , 'parent' , parent ) ; parent . nodes . push ( node ) ; } ; this . addLexer ( fn ) ; return this ; }