1 files changed, 75 insertions, 0 deletions
diff --git a/misc/examples/smartpointers/new_sptr.c b/misc/examples/smartpointers/new_sptr.c
new file mode 100644
index 00000000..3c6fa16c
--- /dev/null
+++ b/misc/examples/smartpointers/new_sptr.c
@@ -0,0 +1,75 @@
+#define i_implement
+#include <stc/cstr.h>
+
+typedef struct { cstr name, last; } Person;
+Person Person_make(const char* name, const char* last);
+Person Person_clone(Person p);
+void Person_drop(Person* p);
+int Person_cmp(const Person* a, const Person* b);
+uint64_t Person_hash(const Person* p);
+
+#define i_type PersonArc
+#define i_keyclass Person // "class" assume _clone, _drop, _cmp, _hash is defined.
+#include <stc/carc.h>
+
+#define i_type IPtr
+#define i_key int
+#define i_keydrop(x) printf("drop: %d\n", *x)
+#define i_cmp_native
+#include <stc/carc.h>
+
+#define i_type IPStack
+#define i_keyboxed IPtr
+#include <stc/cstack.h>
+
+#define i_type PASet
+#define i_keyboxed PersonArc
+#include <stc/cset.h>
+
+
+Person Person_make(const char* name, const char* last) {
+    Person p = {.name = cstr_from(name), .last = cstr_from(last)};
+    return p;
+}
+
+int Person_cmp(const Person* a, const Person* b) {
+    return cstr_cmp(&a->name, &b->name);
+}
+
+uint64_t Person_hash(const Person* p) {
+    return cstr_hash(&p->name);
+}
+
+Person Person_clone(Person p) {
+    p.name = cstr_clone(p.name), p.last = cstr_clone(p.last);
+    return p;
+}
+
+void Person_drop(Person* p) {
+    printf("drop: %s %s\n", cstr_str(&p->name), cstr_str(&p->last));
+    c_drop(cstr, &p->name, &p->last);
+}
+
+
+int main(void) {
+    puts("Ex1");
+    PersonArc p = PersonArc_from(Person_make("John", "Smiths"));
+    PersonArc q = PersonArc_clone(p); // share
+    PersonArc r = PersonArc_clone(p);
+    PersonArc s = PersonArc_from(Person_clone(*p.get)); // deep copy
+    printf("%s %s: refs %ld\n", cstr_str(&p.get->name), cstr_str(&p.get->last), *p.use_count);
+    c_drop(PersonArc, &p, &q, &r, &s);
+
+    puts("Ex2");
+    IPStack vec = {0};
+    IPStack_push(&vec, IPtr_from(10));
+    IPStack_push(&vec, IPtr_from(20));
+    IPStack_emplace(&vec, 30); // same as IPStack_push(&vec, IPtr_from(30));
+    IPStack_push(&vec, IPtr_clone(*IPStack_back(&vec)));
+    IPStack_push(&vec, IPtr_clone(*IPStack_front(&vec)));
+
+    c_foreach (i, IPStack, vec)
+        printf(" (%d: refs %ld)", *i.ref->get, *i.ref->use_count);
+    puts("");
+    IPStack_drop(&vec);
+}