[sv-bc] RE: Enum assignment via packed struct

Hi,

This was previously noted in http://www.eda-stds.org/sv-bc/hm/5169.html.

However, it is not clear to me that according to a strict reading of the LRM, an enum may be a member of a packed struct.

Regards,
Shalom

From: owner-sv-bc@eda.org [mailto:owner-sv-bc@eda.org] On Behalf Of Surya Pratik Saha
Sent: Wednesday, June 20, 2012 15:50
To: sv-bc@eda.org
Subject: [sv-bc] Enum assignment via packed struct

Hi,
As per LRM, an enum variable can only be assigned to another enum variable of same type or enum member. But if it is part of a packed struct, then the restriction can be overridden. Please see the following e.g.:

module top;
    typedef enum bit [1:0] {X, Y, Z} et;
    typedef struct packed {
        et e;
    } st;
    et e;
    st s;
    initial begin
        s = 4; // Passing
        e = 4; // Failing
    end
endmodule

Does LRM say anything about that? Should it not be disallowed by some way?

Regards
Surya

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Received on Wed Jun 20 06:01:51 2012