nl_tokens: Parse the property list of an object pattern .
pl_tokens: function parseProperties ( node ) { consume ( ) ; // '(' while ( true ) { clear ( ) ; /**
         * Properties always have to start with '.' or ':'
         * o(.x, :y) matches an object with at least an owned property
         * 'x' and a owned or inherited property 'y'. 
         */ if ( peek ( ) === '.' ) { parseProperty ( node , false ) ; // own property } else if ( peek ( ) === ':' ) { parseProperty ( node , <mask> ) ; // prototype property } else { unexpectedTokenException ( '. or :' ) ; } clear ( ) ; if ( peek ( ) !== ',' ) { break ; } consume ( ) ; // ',' } }