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[bit-set-invertible] Implement iterator

This commit is contained in:
Behdad Esfahbod 2021-08-18 21:39:04 -06:00
parent c66894d7c9
commit 669b97d949
1 changed files with 29 additions and 3 deletions
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32
src/hb-bit-set-invertible.hh
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@ -155,9 +155,35 @@ struct hb_bit_set_invertible_t
/*
* Iterator implementation.
*/
/*XXX(inverted)*/
using iter_t = hb_bit_set_t::iter_t;
iter_t iter () const { return iter_t (this->s); }
struct iter_t : hb_iter_with_fallback_t<iter_t, hb_codepoint_t>
{
static constexpr bool is_sorted_iterator = true;
iter_t (const hb_bit_set_invertible_t &s_ = Null (hb_bit_set_invertible_t),
bool init = true) : s (&s_), v (INVALID), l(0)
{
if (init)
{
l = s->get_population () + 1;
__next__ ();
}
}
typedef hb_codepoint_t __item_t__;
hb_codepoint_t __item__ () const { return v; }
bool __more__ () const { return v != INVALID; }
void __next__ () { s->next (&v); if (l) l--; }
void __prev__ () { s->previous (&v); }
unsigned __len__ () const { return l; }
iter_t end () const { return iter_t (*s, false); }
bool operator != (const iter_t& o) const
{ return s != o.s || v != o.v; }
protected:
const hb_bit_set_invertible_t *s;
hb_codepoint_t v;
unsigned l;
};
iter_t iter () const { return iter_t (*this); }
operator iter_t () const { return iter (); }
};