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// shared_ptr-examples.cpp
// based on https://docs.microsoft.com/en-us/cpp/cpp/how-to-create-and-use-shared-ptr-instances?view=msvc-160
#include <stc/cstr.h>
struct Song
{
cstr artist;
cstr title;
} typedef Song;
Song Song_new(const char* artist, const char* title)
{ return (Song){cstr_from(artist), cstr_from(title)}; }
void Song_drop(Song* s) {
printf("drop: %s\n", cstr_str(&s->title));
c_drop(cstr, &s->artist, &s->title);
}
#define i_type SongPtr
#define i_val Song
#define i_valdrop Song_drop
#define i_opt c_no_cmp
#include <stc/carc.h>
#define i_type SongVec
#define i_val_arcbox SongPtr
#include <stc/cvec.h>
void example3()
{
c_auto (SongVec, vec, vec2)
{
c_apply(v, SongVec_push_back(&vec, *v), SongPtr, {
SongPtr_make(Song_new("Bob Dylan", "The Times They Are A Changing")),
SongPtr_make(Song_new("Aretha Franklin", "Bridge Over Troubled Water")),
SongPtr_make(Song_new("Thalia", "Entre El Mar y Una Estrella"))
});
c_foreach (s, SongVec, vec)
if (!cstr_equals(s.ref->get->artist, "Bob Dylan"))
SongVec_push_back(&vec2, SongPtr_clone(*s.ref));
c_apply(v, SongVec_push_back(&vec2, *v), SongPtr, {
SongPtr_make(Song_new("Michael Jackson", "Billie Jean")),
SongPtr_make(Song_new("Rihanna", "Stay")),
});
c_foreach (s, SongVec, vec2)
printf("%s - %s: refs %lu\n", cstr_str(&s.ref->get->artist),
cstr_str(&s.ref->get->title),
*s.ref->use_count);
}
}
int main()
{
example3();
}
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