private function exprList() {
    $node = new CommaListNode();
    do {
      $node->addChild($this->expr());
    } while ($this->tryMatch(',', $node));
    return $node;
  }
private function exprList() {
    $node = new CommaListNode();
    do {
      $node->addChild($this->expr());
    } while ($this->tryMatch(',', $node));
    return $node;
  }
private function exprList ( ) { $ node = new CommaListNode ( ) ; do { $ node -> addChild ( $ this -> expr ( ) ) ; } while ( $ this -> tryMatch ( ',' , $ node ) ) ; return $ node ; }
Parse a list of expressions.
@return CommaListNode
Parse a list of expressions .