[meta] Flesh out hb_invoke()

4fc2d2d7 · Behdad Esfahbod · e03d9395 · 4fc2d2d7
隐藏空白更改
内联并排

Showing with 12 addition and 2 deletion

src/hb-algs.hh src/hb-algs.hh +12 -2

未找到文件。
--- a/src/hb-algs.hh
+++ b/src/hb-algs.hh
@@ -75,11 +75,21 @@ struct
 {
  private:

-  // TODO Add overload to for pointer-to-member and pointer-to-member-function ala std::invoke
+  /* Pointer-to-member-function. */
+  template <typename Appl, typename Val> auto
+  impl (Appl&& a, Val &&v, hb_priority<1>) const HB_AUTO_RETURN_EXPR (hb_forward<Val> (v).*a ())
+  template <typename Appl, typename Val> auto
+  impl (Appl&& a, Val &&v, hb_priority<1>) const HB_AUTO_RETURN_EXPR (hb_forward<Val> (v)->*a ())

+  /* Pointer-to-member. */
  template <typename Appl, typename Val> auto
-  impl (Appl&& a, Val &&v, hb_priority<1>) const HB_AUTO_RETURN_EXPR (a (hb_forward<Val> (v)))
+  impl (Appl&& a, Val &&v, hb_priority<1>) const HB_AUTO_RETURN_EXPR (hb_forward<Val> (v).*a)
+  template <typename Appl, typename Val> auto
+  impl (Appl&& a, Val &&v, hb_priority<1>) const HB_AUTO_RETURN_EXPR (hb_forward<Val> (v)->*a)

+  /* Operator(). */
+  template <typename Appl, typename Val> auto
+  impl (Appl&& a, Val &&v, hb_priority<1>) const HB_AUTO_RETURN_EXPR (a (hb_forward<Val> (v)))
  template <typename Appl, typename Val> auto
  impl (Appl&& a, Val &&v, hb_priority<0>) const HB_AUTO_RETURN_EXPR ((*a) (hb_forward<Val> (v)))