[iter] Accept C arrays in hb_iter()

src/hb-array.hh

@@ -45,12 +45,11 @@ struct hb_array_t :
    * Constructors.
    */
   hb_array_t () : arrayZ (nullptr), length (0) {}
-  hb_array_t (Type *array_, unsigned int length_) : arrayZ (array_), length (length_) {}
   template <typename U = Type, hb_enable_if (hb_is_const (U))>
   hb_array_t (const hb_array_t<hb_remove_const (Type)> &o) : arrayZ (o.arrayZ), length (o.length) {}
+  hb_array_t (Type *array_, unsigned int length_) : arrayZ (array_), length (length_) {}
   template <unsigned int length_> hb_array_t (Type (&array_)[length_]) : arrayZ (array_), length (length_) {}
 
-
   /*
    * Iterator implementation.
    */
@@ -185,7 +184,6 @@ template <typename T, unsigned int length_> inline hb_array_t<T>
 hb_array (T (&array_)[length_])
 { return hb_array_t<T> (array_); }
 
-
 enum hb_bfind_not_found_t
 {
   HB_BFIND_NOT_FOUND_DONT_STORE,

src/hb-iter.hh

@@ -112,10 +112,21 @@ struct hb_iter_t
 /* Returns iterator type of a type. */
 #define hb_iter_t(Iterable) decltype (hb_declval (Iterable).iter ())
 
+
+/* TODO Change to function-object. */
+
 template <typename T>
 inline hb_iter_t (T)
 hb_iter (const T& c) { return c.iter (); }
 
+/* Specialization for C arrays. */
+template <typename> struct hb_array_t;
+template <typename Type> inline hb_array_t<Type>
+hb_iter (Type *array, unsigned int length) { return hb_array_t<Type> (array, length); }
+template <typename Type, unsigned int length> hb_array_t<Type>
+hb_iter (Type (&array)[length]) { return hb_iter (array, length); }
+
+
 /* Mixin to fill in what the subclass doesn't provide. */
 template <typename iter_t, typename item_t = typename iter_t::__item_t__>
 struct hb_iter_mixin_t

src/test-iter.cc

@@ -118,6 +118,9 @@ main (int argc, char **argv)
 
   s2 = s;
 
+  hb_iter (src);
+  hb_iter (src, 2);
+
   hb_fill (t, 42);
   hb_copy (t, s);
  // hb_copy (t, a.iter ());
@@ -139,7 +142,7 @@ main (int argc, char **argv)
   hb_array_t<hb_vector_t<int> > pa;
   pa->as_array ();
 
-  + hb_iter (s)
+  + hb_iter (src)
   | hb_map (hb_identity)
   | hb_filter ()
   | hb_filter (hb_bool)