[hash] Comment

2 years ago · e2fd49ff1a
parent fa64e42d75
commit e2fd49ff1a
1 changed files with 1 additions and 1 deletions
--- a/src/hb-algs.hh
+++ b/src/hb-algs.hh
@ -317,7 +317,7 @@ struct
  // Horrible: std:hash() of integers seems to be identity in gcc / clang?!
  template <typename T,
 	    hb_enable_if (std::is_integral<T>::value)> constexpr auto
-  impl (const T& v, hb_priority<1>) const HB_RETURN (uint32_t, v * 8388607)
+  impl (const T& v, hb_priority<1>) const HB_RETURN (uint32_t, v * 8388607 /* Mersenne prime */)

  template <typename T> constexpr auto
  impl (const T& v, hb_priority<0>) const HB_RETURN (uint32_t, std::hash<hb_decay<decltype (hb_deref (v))>>{} (hb_deref (v)))