From 8284ea51bd3ad99a9d2a66b749163410e7169c29 Mon Sep 17 00:00:00 2001
From: lisyarus <lisyarus@gmail.com>
Date: Tue, 9 Mar 2021 23:06:45 +0300
Subject: [PATCH] Add geom::point hash

---
 libs/geom/include/psemek/geom/point.hpp | 20 ++++++++++++++++++++
 1 file changed, 20 insertions(+)

diff --git a/libs/geom/include/psemek/geom/point.hpp b/libs/geom/include/psemek/geom/point.hpp
index 253ad190..63af73e2 100644
--- a/libs/geom/include/psemek/geom/point.hpp
+++ b/libs/geom/include/psemek/geom/point.hpp
@@ -1,5 +1,7 @@
 #pragma once
 
+#include <psemek/util/hash.hpp>
+
 #include <psemek/geom/detail/array.hpp>
 #include <psemek/geom/vector.hpp>
 
@@ -199,3 +201,21 @@ namespace psemek::geom
 	}
 
 }
+
+namespace std
+{
+
+	template <typename T, std::size_t N>
+	struct hash<::psemek::geom::point<T, N>>
+	{
+		std::size_t operator()(::psemek::geom::point<T, N> const & v) const noexcept
+		{
+			std::hash<T> h;
+			std::size_t r = 0;
+			for (std::size_t i = 0; i < N; ++i)
+				::psemek::util::hash_combine(r, h(v[i]));
+			return r;
+		}
+	};
+
+}