Structs and dynamic arrays/queues

A "struct" in 'e' is equivalent to "class" [Dynamic] in SV. A "unit" in 'e' is equivalent [only static part] to "struct" in SV. I think this should solve the issue. Here all fields in basic structs have do-not-generate '!' in its definition. That means, user doesn't want to do any class randomization on these struct fields.

Also, when the struct in instantiated [basic_struct_list_s] , instantiation also has do-not-generate. class basic_struct; int unsigned addr; int unsigned trans; int unsigned size; int unsigned write; int unsigned burst; int unsigned resp; int unsigned data; int unsigned data_x; endclass class basic_struct_list_s; basic_struct basic_struct_list []; endclass ... // master is a static array of basic_struct_list_s [size = 6]. Each item of arry is dynamic array of size 0. basic_struct_list_s master[6]; Tim (with help from Vishal)

Excellent!
This solved the problem!
Thank you!!!!

Hi again, I implemented the class basic_struct_list_s with a queue as a data member since I want to use some of the built in methods for queues. Is there a way to use these methods (in particular the find methods such as find_first(), find_first_index) when the queue is a queue of classes and other class data member? I tried to do it like this: < ... class basic_struct; uint lo_addr; uint hi_addr; string addr_name; endclass class basic_struct_list_c; basic_struct basic_struct_list[$]; endclass basic_struct temp_struct; basic_struct_list_c master[6]; ... initial begin temp_struct = new; for (i=0 ; i<6 ; i++ ) begin master[i] = new; end // for (i=0 ; i<6 ; i++ ) ... temp_struct = master[0].basic_struct_list.find_first((item.lo_addr<=4) && (item.hi_addr>=5)); ... end //initial > I received the folloeing error: temp_struct = master[0].basic_struct_list.find_first( (item.lo_addr<=4) && (item.hi_addr>=5) ); | ncvlog: *E,QAANBI (test_program1.v,91|55): This is not a valid built in method name for this object. [SystemVerilog]. temp_struct = master[0].basic_struct_list.find_first( (item.lo_addr<=4) && (item.hi_addr>=5) ); | ncvlog: *E,NOTFXX (test_program1.v,91|55): expecting a function name [10.3.3(IEEE)].

Just posting the reply again in a more understandable way...

Hi again, I implemented the class basic_struct_list_s with a queue as a data member since I want to use some of the built in methods for queues. Is there a way to use these methods (in particular the find methods such as find_first(), find_first_index) when the queue is a queue of classes and other class data member? I tried to do it like this:
 ... class basic_struct; uint lo_addr; uint hi_addr; string addr_name; endclass class basic_struct_list_c; basic_struct basic_struct_list[$] endclass basic_struct temp_struct; basic_struct_list_c master?] ... initial begin temp_struct = new; for (i=0 ; i<6 ; i++ ) begin master[i] = new; end // for (i=0 ; i<6 ; i++ ) ... temp_struct = master?].basic_struct_list.find_first((item.lo_addr<=4) && (item.hi_addr>=5)); ... end //initial I received the folloeing error: temp_struct = master?].basic_struct_list.find_first( (item.lo_addr<=4) && (item.hi_addr>=5) ); | ncvlog: *E,QAANBI (test_program1.v,91|55): This is not a valid built in method name for this object. [SystemVerilog]. temp_struct = master?].basic_struct_list.find_first( (item.lo_addr<=4) && (item.hi_addr>=5) ); | ncvlog: *E,NOTFXX (test_program1.v,91|55): expecting a function name ?.3.3(IEEE)].

One more try...

Hi again,
I implemented the class basic_struct_list_s with a queue as a data member since I want to use some of the built in methods for queues. Is there a way to use these methods (in particular the find methods such as find_first(), find_first_index) when the queue is a queue of classes and other class data member? I tried to do it like this:

< code > 
...
class basic_struct;
      uint lo_addr;
      uint hi_addr;
      string addr_name;
endclass

class basic_struct_list_c;
      basic_struct basic_struct_list[$];
endclass basic_struct temp_struct;

basic_struct_list_c master[6]
...
initial
begin
      temp_struct = new;
      for (i=0 ; i<6 ; i++ )
            begin master[i] = new;
      end // for (i=0 ; i<6 ; i++ )
... 
      temp_struct = master[0].basic_struct_list.find_first((item.lo_addr<=4) && (item.hi_addr>=5)); ...
end //initial
< /code >

I received the following error:


   temp_struct = master[0].basic_struct_list.find_first( (item.lo_addr<=4) && (item.hi_addr>=5) );
                                                                                  |
ncvlog: *E,QAANBI (test_program1.v,91|55): This is not a valid built in method name for this object. [SystemVerilog].
   temp_struct = master[0].basic_struct_list.find_first( (item.lo_addr<=4) && (item.hi_addr>=5) );
                                                                                  |
ncvlog: *E,NOTFXX (test_program1.v,91|55): expecting a function name [10.3.3(IEEE)].



I use the "Add Reply" button instead of the Reply box at the bottom. I've found that I have better luck with formatting that way.

Some of your code example was garbled but here is a working example that I think shows what you want to do:

module test; class test_c; rand bit [3:0] a; endclass class test_list_c; test_c list_q [$]; endclass test_list_c tl = new; test_c qi[$]; test_c t; initial begin repeat (5) begin t = new; void'(t.randomize()); $display("t = %d", t.a); tl.list_q.push_back(t); end qi = tl.list_q.find_first with (item.a > 5); t = qi.pop_front(); $display("first item = %d", t.a); end endmodule
Tim

Hi Tim,
Sorry for the late response. I've just tried to do what you had suggested but I still receive compilation errors. My code is very similar to the code you have given as an example and the compilation errors are same. If i try to compile your code I receive:
qi = tl.list_q.find_first with (item.a > 5); ncvlog: *E,EXPSMC (test_program2.v,18|39): expecting a semicolon (';') [9.2.2(IEEE)]. qi = tl.list_q.find_first with (item.a > 5); ncvlog: *E,NOTSTT (test_program2.v,18|41): expecting a statement [9(IEEE)]. qi = tl.list_q.find_first with (item.a > 5); ncvlog: *E,MISEXX (test_program2.v,18|49): expecting an '=' or '<=' sign in an assignment [9.2(IEEE)]. qi = tl.list_q.find_first with (item.a > 5); ncvlog: *E,NOTSTT (test_program2.v,18|52): expecting a statement [9(IEEE)].

Flanter

Which version of IUS you are using? You should be using latest version available.

I was using IUS 6.1.1-s003. With IUs 6.20-p001 it works!
Thank you