nl_tokens: Set an error message with the current line number and column .
pl_tokens: function ( msg ) { var message = this . file . relative + ' line:' + this . lineno + ' column:' + this . column + ': ' + msg ; var err = new Error ( message ) ; err . reason = msg ; err . line = this . lineno ; err . column = this . column ; err . source = this . input ; err . <mask> = this . file . path ; if ( this . options . silent ) { this . errors . push ( err ) ; } else { throw err ; } }