message: uncomment constant_expression and primary_constant
diff: @@ -2871,9 +2871,8 @@ conditional_expression : cond_predicate '?' ( attribute_instance )* expression
  ;
  constant_expression :
  -//constant_primary [TODO]
  -//|
  - unary_operator ( attribute_instance )* constant_primary
  +constant_primary
  +| unary_operator ( attribute_instance )* constant_primary
  | constant_expression binary_operator ( attribute_instance )* constant_expression
  | constant_expression '?' ( attribute_instance )* constant_expression ':' constant_expression
  ;
  @@ -2972,9 +2971,8 @@ genvar_expression : constant_expression
  // A.8.4 Primaries
  constant_primary :
  -//primary_literal // [TODO]
  -//|
  - ps_parameter_identifier constant_select
  +primary_literal
  +| ps_parameter_identifier constant_select
  | specparam_identifier ( '[' constant_range_expression ']' )?
  | genvar_identifier
  | formal_port_identifier constant_select
  