Computed goto's

[David L. Andre <DLA@DIAMOND.S4CC.Symbolics.COM>]

    Date: 30 Mar 87 16:57:26 EST
    From: primerd!DOUG@ENX.Prime.PDN


    Thinking about it there are times when one would like to do a computed goto.
    I notice that (go tag) in tagbody is explicitly not calculated.  For 
    maximum effect the computation should result directly in a dispatched
    goto.  One can get the effect of this by using lambda's in an array and
    doing an array lookup but this is somewhat more expensive (?).

    Any suggestions about this?  

Why not use CASE on the dispatching integer?  A good compiler could
always turn it into a dispatch instruction if the hardware supports it.