Constraint problem

SystemVerilog
,
1

why size method doesn’t work for array when we use in expression

class array_size;
rand int a;
rand int x,y,z;
rand int len;

constraint array_c {
len inside {[200:300]};
a.size == len;
x.size + y.size + z.size == len; //not working
}
endclass

// Above code is not working and the tool is shouting error.
What is the best way to fix size for multiple array that depends on one variable

2

In reply to Maximus:

class array_size;
  rand int a[];
rand int x[],y[],z[];
rand int len;

constraint array_c {
//len inside {[200:300]};
  len > 200 && len < 300;
  a.size == len;
  x.size < len;
  y.size < len;
  z.size < len;
  x.size + y.size + z.size == len; //not working
}
endclass

module abc;
  
  array_size a1;
  
  initial begin
    a1 = new();
    a1.randomize();
    $display(a1.a.size(), a1.x.size(), a1.y.size(), a1.z.size());
  end
  
endmodule

This is working…