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module top;
localparam BITS=8;
struct packed {
logic a;
logic[BITS-1:0] b;
byte c;
logic x, y;
} s;
struct packed signed {
integer a;
logic[15:0] b;
logic[7:0] c;
bit [7:0] d;
} pack1;
struct packed {
byte a;
struct packed {
byte x, y;
} b;
} s2;
assign s.a = '1;
assign s.b = '1;
assign s.c = 8'hAA;
assign s.x = '1;
logic[7:0] t;
assign t = s.b;
assign pack1.a = 42;
assign pack1.b = 16'hAAAA;
assign pack1.c = '1;
assign pack1.d = 8'h55;
assign s2.b.x = 'h42;
always_comb assert(s.a == 1'b1);
always_comb assert(s.c == 8'hAA);
always_comb assert(s.x == 1'b1);
always_comb assert(t == 8'hFF);
always_comb assert(pack1.a == 42);
always_comb assert(pack1.b == 16'hAAAA);
always_comb assert(pack1.c == 8'hFF);
always_comb assert(pack1[15:8] == 8'hFF);
always_comb assert(pack1.d == 8'h55);
always_comb assert(s2.b.x == 'h42);
endmodule
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