Leopold Toetsch <[EMAIL PROTECTED]> writes: > Piers Cawley <[EMAIL PROTECTED]> wrote: > >> When you make a full continuation with clone, can't you chase up its >> continuation chain and mark its reachable continuations (and only those >> continuations) as non recyclable? (This is one of the reasons I think >> that a Continuation should have an explicit copy of the continuation >> that was current when it was made, rather than relying on >> savetop/pushtopp to capture it.) > > We need getting at the call chain anyway. But storing P1 elsewhere seems > not to be the right thing. OTOH a subroutine using integers only would > preserve it's context just with C<pushtopi>, if P1 is saved elsewhere. > Your proposal smells like: the return continuation is normally hidden > (i.e. not in any register, just in the context). Some opcode like > C<get_current_cont> makes it available for backtracking or such.
That certainly makes sense to me; can anyone think of cases where having/making an explicit return continuation is a good thing?
