Leopold Toetsch wrote:
But C statics can of course change. The problems is, where to
store the static variable, especially native integers.
Another idea:
We keep the call frame of subs with statics (or Perl6 INIT and FIRST
blocks) after returning from the sub. Additionally, we can set a new
entrypoint for the sub after running the INIT code (or static
initializer). The entrypoint would be reset for cloning closures to
achieve perl6 FIRST block semantics.
The draw backs are increased memory usage and it doesn't work together
with recursive subroutines easily, albeit I don't know, if recursive
subs with statics are really meaningful.
E.g.
.sub "gen_random"
.param float max
.static int last # just an alias for .local maybe
last = 42
after_init gen_random_init_done # move sub entry point
goto gen_rand_2 # after_init could branch too
gen_random_init_done: # automatically
.param float max # duplicated get_params
gen_rand_2
....
.end
Comments welcome,
leo
