gc_str.go

type str struct {
	p unsafe.Pointer
	a int
}

func mstr(s string) str {
	ss := *(*[2]uintptr)(unsafe.Pointer(&s))
	fmt.Println(ss)
	return str{
		p: unsafe.Pointer(ss[0]),
		a: int(ss[1]),
	}
}

func (s str) String() string {
	var ss string
	v := (*[2]uintptr)(unsafe.Pointer(&ss))
	(*v)[0] = uintptr(s.p)
	(*v)[1] = uintptr(s.a)
	return ss
}

func TestStr(t *testing.T) {
	// a := "b"
	var s []str
	for i := 0; i < 3; i++ {
		s = append(s, mstr("a"+strconv.Itoa(i)))
	}
	runtime.GC()
	t.Log(s)
}