User guide

24-46

SystemVerilog Testbench Constructs

initial begin

Parcel pk1 = new;

Parcel pk2 = new;

Parcel pk3 = new;

$display("%d Parcel", pk3.count);

$display("%d Parcel", pk2.count);

$display("%d Parcel", pk1.count);

end

endprogram

Output

5 Parcel

In the above example, every time an object of type Parcel is created,

the new() function is invoked and the static variable count is

incremented. The final value of count is “5.” If count is declared as

non-static, the output of the above program is:

3 Parcel

Global Constant Class Properties

The const keyword is used to designate a class property as

read-only. Class objects are dynamic objects, therefore either global

or instance properties can be designated “const.” At present, only

global constants are supported.

When declared, a global constant class property includes an initial

value. Consider the following example:

//global_const.sv

program test;