Methods can be declared as static. A static method is subject to all the class scoping and access rules, but behaves like a regular subroutine that can be called outside the class, even with no class instantiation. A static method has no access to nonstatic members (class properties or methods), but it can directly access static class properties or call static methods of the same class. Access to nonstatic members or to the special this handle within the body of a static method is illegal and results in a compiler error. Static methods cannot be virtual.

  1 `define PRINT task print (); \
  2  begin \
  3    $write("%s -> Size is %0d\n",this.name, this.size); \
  4  end \
  5 endtask
  6 
  7 program class_static_method;
  8   // Class with constructor, with no parameter
  9   class A;
 10      // Make size as static
 11      static integer size;
 12      string name;
 13      // Constructor
 14      function new (string name);
 15        begin
 16          this.name = name;
 17          this.size = 0;
 18        end 
 19      endfunction
 20      // static Increment size task
 21      static task inc_size();
 22        begin
 23          size ++; // Ok to access static member
 24          $write("size is incremented\n");
 25          // Not ok to access non static member name          
 26          //$write("%s -> size is incremented\n",name);
 27        end
 28      endtask
 29      // Task in class (object method)
 30      `PRINT
 31    endclass
 32 
 33    A a;
 34 
 35    initial begin
 36      a = new("A");
 37      a.inc_size();
 38      a.print();
 39    end
 40 
 41 endprogram

 size is incremented
 A -> Size is 1

Copyright © 1998-2014

Deepak Kumar Tala - All rights reserved

Do you have any Comment? mail me at:deepak@asic-world.com