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SystemVerilog OOP Mastery · All levels

Static Members and Static Methods in Class-Based Testbenches: Code Examples

Code Examples for Static Members and Static Methods in Class-Based Testbenches.

Code examples

Shared ID allocator

systemverilog
class txn #(type T = int);
  static int next_id = 0;
  int id;
  T payload;

  function new(T payload = '0);
    this.payload = payload;
    id = next_id++;
  endfunction

  static function void reset_ids();
    next_id = 0;
  endfunction
endclass

Every txn#(T) object shares one counter per specialization, and reset_ids() gives deterministic startup behavior across tests.

Static method using explicit object handle

systemverilog
class pkt;
  static int total = 0;
  int len;

  function new(int len);
    this.len = len;
    total++;
  endfunction

  static function bit has_valid_len(pkt p);
    return (p != null) && (p.len > 0);
  endfunction
endclass

The static method cannot read len directly from class scope, so it accepts pkt p and reads instance data through that handle.

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