[set] Add may_have() as alias for get()

src/hb-bit-page.hh

@@ -117,6 +117,7 @@ struct hb_bit_page_t
   void del (hb_codepoint_t g) { elt (g) &= ~mask (g); dirty (); }
   void set (hb_codepoint_t g, bool value) { if (value) add (g); else del (g); }
   bool get (hb_codepoint_t g) const { return elt (g) & mask (g); }
+  bool may_have (hb_codepoint_t g) const { return get (g); }
 
   bool operator [] (hb_codepoint_t g) const { return get (g); }
   bool operator () (hb_codepoint_t g) const { return get (g); }

src/hb-bit-set-invertible.hh

@@ -126,6 +126,7 @@ struct hb_bit_set_invertible_t
   { unlikely (inverted) ? (void) s.add_range (a, b) : s.del_range (a, b); }
 
   bool get (hb_codepoint_t g) const { return s.get (g) ^ inverted; }
+  bool may_have (hb_codepoint_t g) const { return get (g); }
 
   /* Has interface. */
   bool operator [] (hb_codepoint_t k) const { return get (k); }

src/hb-bit-set.hh

@@ -345,6 +345,7 @@ struct hb_bit_set_t
       return false;
     return page->get (g);
   }
+  bool may_have (hb_codepoint_t g) const { return get (g); }
 
   /* Has interface. */
   bool operator [] (hb_codepoint_t k) const { return get (k); }

src/hb-set.hh

@@ -106,6 +106,7 @@ struct hb_sparseset_t
   void del_range (hb_codepoint_t a, hb_codepoint_t b) { s.del_range (a, b); }
 
   bool get (hb_codepoint_t g) const { return s.get (g); }
+  bool may_have (hb_codepoint_t g) const { return get (g); }
 
   /* Has interface. */
   bool operator [] (hb_codepoint_t k) const { return get (k); }