Ah yes, missed the slashes before the comments. Thanks!

I noticed another typo in your second code example:
my_opcode_struct_t opcode_s; “fields view” to the struct
Should be:
my_opcode_struct_t opcode_s; // “fields view” to the struct

Keep the helpful articles coming.

Thanks Jonas for noticing the typo! You’re completely correct, I’ve fixed the code snippet above. The same code is correct in the download for this post (I did compile and test that one).

I think you got something wrong in the first code example:
Structs should have each element separated by semicolons, not commas.

i.e.
typedef struct packed
{
my_opcode_t opcode; // 16-bit opcode, enumerated type
my_dest_t dest; // 16-bit destination, enumerated type
logic [15:0] opA;
logic [15:0] opB;
} my_opcode_struct_t;