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// Create a stack and a list of shared pointers to maps,
// and demonstrate sharing and cloning of maps.
#define i_type Map
#define i_key_str // strings
#define i_val int
#define i_keydrop(p) (printf("drop name: %s\n", (p)->str), cstr_drop(p))
#include <stc/csmap.h>
#define i_type Arc // (atomic) ref. counted type
#define i_val Map
#define i_drop(p) (printf("drop Arc:\n"), Map_drop(p))
// no need for atomic ref. count in single thread:
// no compare function available for csmap:
#define i_opt c_no_atomic|c_no_cmp
#include <stc/csptr.h>
#define i_type Stack
#define i_val_ref Arc // define i_val_bind for csptr/cbox value (not i_val)
#include <stc/cstack.h>
#define i_type List
#define i_val_ref Arc // as above
#include <stc/clist.h>
int main()
{
c_auto (Stack, stack)
c_auto (List, list)
{
// POPULATE stack with shared pointers to Maps:
Map *map;
map = Stack_push(&stack, Arc_from(Map_init()))->get;
c_apply(v, Map_emplace(map, c_pair(v)), Map_rawvalue, {
{"Joey", 1990}, {"Mary", 1995}, {"Joanna", 1992}
});
map = Stack_push(&stack, Arc_from(Map_init()))->get;
c_apply(v, Map_emplace(map, c_pair(v)), Map_rawvalue, {
{"Rosanna", 2001}, {"Brad", 1999}, {"Jack", 1980}
});
// POPULATE list:
map = List_push_back(&list, Arc_from(Map_init()))->get;
c_apply(v, Map_emplace(map, c_pair(v)), Map_rawvalue, {
{"Steve", 1979}, {"Rick", 1974}, {"Tracy", 2003}
});
// Share two Maps from the stack with the list using emplace (clone the csptr):
List_push_back(&list, Arc_clone(stack.data[0]));
List_push_back(&list, Arc_clone(stack.data[1]));
// Clone (deep copy) a Map from the stack to the list
// List will contain two shared and two unshared maps.
map = List_push_back(&list, Arc_from(Map_clone(*stack.data[1].get)))->get;
// Add one more element to the cloned map:
Map_emplace_or_assign(map, "CLONED", 2021);
// Add one more element to the shared map:
Map_emplace_or_assign(stack.data[1].get, "SHARED", 2021);
puts("STACKS");
c_foreach (i, Stack, stack) {
c_forpair (name, year, Map, *i.ref->get)
printf(" %s:%d", _.name.str, _.year);
puts("");
}
puts("LIST");
c_foreach (i, List, list) {
c_forpair (name, year, Map, *i.ref->get)
printf(" %s:%d", _.name.str, _.year);
puts("");
}
}
}
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