From dd3583909fff6aa00315df629e0abd6904ecce63 Mon Sep 17 00:00:00 2001
From: Nikita Ushakov <nikita.ushakov0000@outlook.com>
Date: Wed, 25 Dec 2024 19:12:15 +0000
Subject: [PATCH] Make cb map as hash table

---
 src/hash.hpp   | 20 ++++++++++++++++++++
 src/plugin.hpp |  1 +
 2 files changed, 21 insertions(+)
 create mode 100644 src/hash.hpp

diff --git a/src/hash.hpp b/src/hash.hpp
new file mode 100644
index 0000000..7db7194
--- /dev/null
+++ b/src/hash.hpp
@@ -0,0 +1,20 @@
+#pragma once
+
+#include <utility>
+
+namespace {
+	template<typename T, typename... Rest>
+	void hash_combine(std::size_t& seed, const T& v, const Rest&... rest) {
+		seed ^= std::hash<T>{}(v) + 0x9e3779b9 + (seed << 6) + (seed >> 2);
+		(hash_combine(seed, rest), ...);
+	}
+}
+
+template<typename T1, typename T2>
+struct std::hash<std::pair<T1, T2>> {
+	std::size_t operator()(std::pair<T1, T2> const& p) const noexcept {
+		std::size_t seed{};
+		hash_combine(seed, p.first, p.second);
+		return seed;
+	}
+};
diff --git a/src/plugin.hpp b/src/plugin.hpp
index bb01438..53d2abe 100644
--- a/src/plugin.hpp
+++ b/src/plugin.hpp
@@ -1,6 +1,7 @@
 #pragma once
 
 #include "callback.hpp"
+#include "hash.hpp"
 
 #include <plugify/cpp_plugin.hpp>
 #include <plugin_export.h>