From 7e1107b1eef4f21558f29b34ae0ab20897c7eb05 Mon Sep 17 00:00:00 2001
From: julian <julian.burellaperez@heig-vd.ch>
Date: Fri, 30 Oct 2020 17:16:41 +0100
Subject: [PATCH] Use robinhood::hash function instead of std::hash

Signed-off-by: julian <julian.burellaperez@heig-vd.ch>
---
 ripser/ripser.cpp | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/ripser/ripser.cpp b/ripser/ripser.cpp
index 73a3a42..f2b7531 100644
--- a/ripser/ripser.cpp
+++ b/ripser/ripser.cpp
@@ -526,7 +526,11 @@ class ripser
     struct entry_hash {
         std::size_t operator()(const entry_t& e) const
         {
+#if defined(USE_ROBINHOOD_HASHMAP)
+            return robin_hood::hash<index_t>()(::get_index(e));
+#else
             return std::hash<index_t>()(::get_index(e));
+#endif
         }
     };