/* cbox: heap allocated boxed type */ #define i_implement #include typedef struct { cstr name, last; } Person; Person Person_make(const char* name, const char* last) { return c_LITERAL(Person){.name = cstr_from(name), .last = cstr_from(last)}; } uint64_t Person_hash(const Person* a) { return cstr_hash(&a->name) ^ cstr_hash(&a->last); } int Person_cmp(const Person* a, const Person* b) { int c = cstr_cmp(&a->name, &b->name); return c ? c : cstr_cmp(&a->last, &b->last); } 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); } #define i_type PBox #define i_keyclass Person // "class" binds _cmp, _clone, _drop functions. #include #define i_type Persons #define i_keyboxed PBox // "arcbox" informs that PBox is a smart pointer. #include int main(void) { Persons vec = {0}; PBox p = PBox_from(Person_make("Laura", "Palmer")); PBox q = PBox_clone(p); cstr_assign(&q.get->name, "Leland"); printf("orig: %s %s\n", cstr_str(&p.get->name), cstr_str(&p.get->last)); printf("copy: %s %s\n", cstr_str(&q.get->name), cstr_str(&q.get->last)); Persons_emplace(&vec, Person_make("Dale", "Cooper")); Persons_emplace(&vec, Person_make("Audrey", "Home")); // NB! Clone/share p and q in the Persons container. Persons_push(&vec, PBox_clone(p)); Persons_push(&vec, PBox_clone(q)); c_foreach (i, Persons, vec) printf("%s %s\n", cstr_str(&i.ref->get->name), cstr_str(&i.ref->get->last)); puts(""); // Look-up Audrey! Create a temporary Person for lookup. Person a = Person_make("Audrey", "Home"); const PBox *v = Persons_get(&vec, a); // lookup if (v) printf("found: %s %s\n", cstr_str(&v->get->name), cstr_str(&v->get->last)); Person_drop(&a); PBox_drop(&p); PBox_drop(&q); Persons_drop(&vec); }