[sv-ac] Procedural checkers

Hi all,

I would like to discuss today the following issue with the procedural checkers brought by Jacob.

Consider the following code:

module m(...);
                bit a;
                ...
                always_comb begin
                                a = 1'b1;
                                check mycheck(a);
                                a = 1'b0;
                                check mycheck(a);
                end
endmodule : m

checker check(x);
                bit y;
                assign y = x & 1'b1; //Redundant but needed to illustrate the problem
                assert #0 (y);
endchecker : check

The semantics of procedural checkers with procedural code (except for always_ff) is not clear. The existing semantics does not work anymore. The easiest way is to forbid procedural instantiation of checkers containing procedural code.

Thanks,
Dmitry
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