original_string: private function parseExpression (){
  		$entities = array();
  
  		do{
  			$e = $this->MatchFuncs(array('parseAddition','parseEntity'));
  			if( $e ){
  				$entities[] = $e;
  				// operations do not allow keyword "/" dimension (e.g. small/20px) so we support that here
  				if( !$this->PeekReg('/\\G\/[\/*]/') ){
  					$delim = $this->MatchChar('/');
  					if( $delim ){
  						$entities[] = $this->NewObj1('Less_Tree_Anonymous',$delim);
  					}
  				}
  			}
  		}while($e);
  
  		if( $entities ){
  			return $this->NewObj1('Less_Tree_Expression',$entities);
  		}
  	}
code: private function parseExpression (){
  		$entities = array();
  
  		do{
  			$e = $this->MatchFuncs(array('parseAddition','parseEntity'));
  			if( $e ){
  				$entities[] = $e;
  				// operations do not allow keyword "/" dimension (e.g. small/20px) so we support that here
  				if( !$this->PeekReg('/\\G\/[\/*]/') ){
  					$delim = $this->MatchChar('/');
  					if( $delim ){
  						$entities[] = $this->NewObj1('Less_Tree_Anonymous',$delim);
  					}
  				}
  			}
  		}while($e);
  
  		if( $entities ){
  			return $this->NewObj1('Less_Tree_Expression',$entities);
  		}
  	}
code_tokens: private function parseExpression ( ) { $ entities = array ( ) ; do { $ e = $ this -> MatchFuncs ( array ( 'parseAddition' , 'parseEntity' ) ) ; if ( $ e ) { $ entities [ ] = $ e ; // operations do not allow keyword "/" dimension (e.g. small/20px) so we support that here if ( ! $ this -> PeekReg ( '/\\G\/[\/*]/' ) ) { $ delim = $ this -> MatchChar ( '/' ) ; if ( $ delim ) { $ entities [ ] = $ this -> NewObj1 ( 'Less_Tree_Anonymous' , $ delim ) ; } } } } while ( $ e ) ; if ( $ entities ) { return $ this -> NewObj1 ( 'Less_Tree_Expression' , $ entities ) ; } }
docstring: Expressions either represent mathematical operations,
  or white-space delimited Entities.
  
  1px solid black
  @var * 2
  
  @return Less_Tree_Expression|null
docstring_tokens: Expressions either represent mathematical operations or white - space delimited Entities .