anchor.diff:  	: constant_mintypmax_expression
   	;
   
  -// 2.5 Declaration ranges
  +// A.2.5 Declaration ranges
   
   dimension
   	: '[' dimension_constant_expression ':' dimension_constant_expression ']'
  
positive.code: 	: udp_instance_identifier range_?
  	;
  */
  // 6 Behavioral statements
  // 6.1 Continuous assignment statements
  
  continuous_assign
  	: 'assign' drive_strength? delay3? list_of_net_assignments ';'
  
negative.code: 	| '(' 'large' ')'
  	;
  
  // A.2.2.3 Delays
  
  delay3
  	: '#' delay_value
  