From 24917370eab71a408cbbeda9000de0b9d9b5cefa Mon Sep 17 00:00:00 2001
From: lisyarus <lisyarus@gmail.com>
Date: Thu, 27 Oct 2022 17:50:41 +0300
Subject: [PATCH] Add util::hash_sequence

---
 libs/util/include/psemek/util/hash.hpp | 9 +++++++++
 1 file changed, 9 insertions(+)

diff --git a/libs/util/include/psemek/util/hash.hpp b/libs/util/include/psemek/util/hash.hpp
index 349a7b0b..701d93a4 100644
--- a/libs/util/include/psemek/util/hash.hpp
+++ b/libs/util/include/psemek/util/hash.hpp
@@ -16,6 +16,15 @@ namespace psemek::util
 		seed = b * k;
 	}
 
+	template <typename Iterator, typename Hash = std::hash<std::decay_t<decltype(*std::declval<Iterator>())>>>
+	void hash_sequence(std::size_t & seed, Iterator begin, Iterator end, Hash hash = Hash{})
+	{
+		for (; begin != end; ++begin)
+		{
+			hash_combine(seed, hash(*begin));
+		}
+	}
+
 	struct any_hash
 	{
 		struct is_transparent{};