From: Mikko Rasa <tdb@tdb.fi>
Date: Wed, 2 Nov 2022 22:00:47 +0000 (+0200)
Subject: Add less-than comparison for handles
X-Git-Url: http://git.tdb.fi/?p=libs%2Fgame.git;a=commitdiff_plain;h=b81c61ce06116727ebaef489f174fac6e0be6760

Add less-than comparison for handles

This allows them to be used as keys for maps or binary search.
---

diff --git a/source/game/handle.h b/source/game/handle.h
index b08bcf8..1808654 100644
--- a/source/game/handle.h
+++ b/source/game/handle.h
@@ -1,6 +1,7 @@
 #ifndef MSP_GAME_HANDLE_H_
 #define MSP_GAME_HANDLE_H_
 
+#include <functional>
 #include <stdexcept>
 #include "pool.h"
 
@@ -37,6 +38,7 @@ public:
 	explicit operator bool() const { return ptr; }
 
 	bool operator==(const Handle &other) const = default;
+	bool operator<(const Handle &other) const { return std::less<T *const>()(ptr, other.ptr); }
 };
 
 template<typename T, typename U>