On Tuesday, 3 March 2015 at 08:04:25 UTC, Manu wrote:
My immediate impression on this problem:
s.array[0] is being passed to foo from main. s does not belong
to main
(is global), and main does not hold have a reference to s.array.
Shouldn't main just need to inc/dec array around the call to
foo when
passing un-owned references down the call tree.
It seems to me that there always needs to be a reference
_somewhere_
on the stack for anything being passed down the call tree
(unless the
function is pure). Seems simplest to capture a stack ref at the
top
level, then as it's received as arguments to each callee, it's
effectively owned by those functions and they don't need to
worry
anymore.
So, passing global x to some function; inc/dec x around the
function
call that it's passed to...? Then the stack has its own
reference, and
the global reference can go away safely.
This is my position too.
There is another problem being discussed now, however, having to
do with references to non-rc'd subcomponents of an Rc'd type.
