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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", s->title.str);
c_drop(cstr, &s->artist, &s->title);
}
#define i_val Song
#define i_drop Song_drop
#define i_opt c_no_cmp
#define i_tag song
#include <stc/csptr.h> // define csptr_song
#define i_val_bind csptr_song
#define i_tag song
#include <stc/cvec.h>
void example3()
{
c_auto (cvec_song, v, v2)
{
c_apply(cvec_song, push_back, &v, {
csptr_song_new(Song_new("Bob Dylan", "The Times They Are A Changing")),
csptr_song_new(Song_new("Aretha Franklin", "Bridge Over Troubled Water")),
csptr_song_new(Song_new("Thalia", "Entre El Mar y Una Estrella"))
});
c_foreach (s, cvec_song, v)
if (!cstr_equals(s.ref->get->artist, "Bob Dylan"))
cvec_song_emplace_back(&v2, *s.ref); // note: calls csptr_song_clone()
c_apply(cvec_song, push_back, &v2, {
csptr_song_new(Song_new("Michael Jackson", "Billie Jean")),
csptr_song_new(Song_new("Rihanna", "Stay")),
});
c_foreach (s, cvec_song, v2)
printf("%s - %s: refs %lu\n", s.ref->get->artist.str, s.ref->get->title.str,
*s.ref->use_count);
}
}
int main()
{
example3();
}
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