I cited this out of subs.pod: "Parrot comes with different subroutine and alike classes which implement CPS (Continuation Passing Style) and PCC (Parrot Calling Conventions) F<docs/pdds/pdd03_calling_conventions.pod>."
I don't get this. Could anybody rephrase it for me? Later: =head2 Items in the Subs Context Subtype Controlstack PadStack UserStack Warnings ------------------------------------------------------------ Sub - - - X Closure X X Continuation X X X X Coroutine X X X X What are "-", "X", and " "(whitespace) supossed to mean there? Do these indicate that Sub has ControlSatck, PadStack, UserStack as parts of its context but Warnings which do not belong to it? Or quite the contary, as in the case of Coroutine, "X" points out everything forms context? And if this is the case, "+" woud be more clear. Why is Eval not there? Does it have no context? More: "If items in the interpreter context are changed between creation of the subroutine/return continuation and its invocation, the C<updatecc> opcode should be used:" What items? Items of the interpreter context or items of the Sub context mentioned above? Is there any difference betwen these? How do I know items are changed? Thanks.
