Implement mux using for loop

You said

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This is probably the best situation, as you wouldnt want control logic selecting a non-existing connection.

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The mux_out can be invalid for some mux_slct values if further in the pipeline this mux_out signal is not propagated in situation where mux_slct was "out of bounds". You still want to be able to test your circuit so you need a default value or the simulation will fail.

So yeah, I'll opt for a robust solution ;-)

It's just desapointing Quartus (maybe just my student version?) can't manage with the for...loop statement. I'm sure some other synthesis tools can.

Thank you for your help Tricky!