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  • forward declaration of covergroup

forward declaration of covergroup

SystemVerilog 6740
forward typedefs 2 covergroup 6
tsb_matumoto
tsb_matumoto
Full Access
28 posts
January 07, 2020 at 6:39 pm

How to do forward declaration of covergroup?
I put covergroup in class like below. This is compilation error by Xcelium saying no data type found.

// typedef covergroup cg; // <-- compile error 
class myclass;
 
   function new();
      cg = new();  // compile error
   endfunction
 
  covergroup cg;
  ... 
  endgroup
endclass

Thanks

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Solution

Solution

Rahulkumar
Rahulkumar
Full Access
173 posts
January 07, 2020 at 9:24 pm

In reply to tsb_matumoto:

This should work. I tried in two different tool. 

class myclass;
 
   function new();
      cg = new();
   endfunction
 
  covergroup cg;
  ... 
  endgroup
 
endclass
tsb_matumoto
tsb_matumoto
Full Access
28 posts
January 08, 2020 at 11:02 pm

In reply to Rahulkumar Patel:

Thank you for your check. Just in case, here is error log by Xcelium(Cadence).
I understood this is a sort of limitation in Xcelium.

Quote:

xrun(64): 19.06-v001: (c) Copyright 1995-2019 Cadence Design Systems, Inc.
file: tb01.sv
cg = new();
|
xmvlog: *E,UNDIDN (tb01.sv,4|7): 'cg': undeclared identifier [12.5(IEEE)].
xmvlog: *W,NOTOPL: no top-level unit found, must have recursive instances.
Total errors/warnings found outside modules and primitives:
errors: 1, warnings: 1
xrun: *E,VLGERR: An error occurred during parsing. Review the log file for errors with the code *E and fix those identified problems to proceed. Exiting with code (status 1).
TOOL: xrun(64) 19.06-v001: Exiting on Jan 08, 2020 at 22:59:52 PST (total: 00:00:00)
Rahulkumar
Rahulkumar
Full Access
173 posts
January 09, 2020 at 4:42 am

In reply to tsb_matumoto:

Just move covergroup before new if it isn't working for specific tool. 

class myclass;
 
  covergroup cg;
  ... 
  endgroup
 
   function new();
      cg = new();
   endfunction
 
endclass
tsb_matumoto
tsb_matumoto
Full Access
28 posts
January 10, 2020 at 1:30 am

In reply to Rahulkumar Patel:

Yes. Thank you very much for the information.

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