What is wrong with the following code fragment intended for synthesis?

reg foo;

counter u2 (.clock(clock), .in(in), .latch(latch), .dec(dec), .zero(foo)); // counter is from the notes

Question

What is wrong with the following code fragment intended for synthesis?

reg foo; 
   
 counter u2 (.clock(clock), .in(in), .latch(latch), .dec(dec), .zero(foo)); // counter is from the notes

Accepted Answer

foo must be of type wire

Answer

Nothing is wrong

Answer

Counter must be instanced as u1

Answer

clock, in, latch and dec cannot take on the same names as the ports

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