From 396f8203acd800ff7ff90312671830b2a3a9e4cc Mon Sep 17 00:00:00 2001
From: Peter Johnson <johnson.peter@gmail.com>
Date: Sat, 19 Oct 2024 00:08:26 -0700
Subject: [PATCH] [ntcore] HandleMap: Use concepts for T

---
 ntcore/src/main/native/cpp/HandleMap.h | 8 +++++++-
 1 file changed, 7 insertions(+), 1 deletion(-)

diff --git a/ntcore/src/main/native/cpp/HandleMap.h b/ntcore/src/main/native/cpp/HandleMap.h
index 03e73f9b15..89b4866890 100644
--- a/ntcore/src/main/native/cpp/HandleMap.h
+++ b/ntcore/src/main/native/cpp/HandleMap.h
@@ -4,6 +4,7 @@
 
 #pragma once
 
+#include <concepts>
 #include <memory>
 #include <utility>
 
@@ -13,8 +14,13 @@
 
 namespace nt {
 
+template <typename T>
+concept HandleType = requires {
+  { T::kType } -> std::convertible_to<NT_Handle>;
+};
+
 // Utility wrapper class for our UidVectors
-template <typename T, size_t Size>
+template <HandleType T, size_t Size>
 class HandleMap : public wpi::UidVector<std::unique_ptr<T>, Size> {
  public:
   template <typename... Args>