[set] Implement unified iterator
diff --git a/src/hb-set.hh b/src/hb-set.hh
index ce03a4c..3207aa8 100644
--- a/src/hb-set.hh
+++ b/src/hb-set.hh
@@ -668,6 +668,26 @@
static const hb_codepoint_t INVALID = HB_SET_VALUE_INVALID;
+ /*
+ * Iterator implementation.
+ */
+ struct iter_t
+ {
+ iter_t (const hb_set_t &s_) : s (s_), v (INVALID) { __next__ (); }
+
+ typedef hb_codepoint_t __item_type__;
+ hb_codepoint_t __item__ () const { return v; }
+ bool __more__ () const { return v != INVALID; }
+ void __next__ () { s.next (&v); }
+ void __prev__ () { s.previous (&v); }
+
+ protected:
+ const hb_set_t &s;
+ hb_codepoint_t v;
+ };
+ iter_t iter () { return iter_t (*this); }
+ operator iter_t () { return iter (); }
+
protected:
page_t *page_for_insert (hb_codepoint_t g)
