From 591856e7dc3cddb2ea46b2d38a8eb2bf4b0d89f8 Mon Sep 17 00:00:00 2001
From: "J. Nick Koston" <nick@home-assistant.io>
Date: Sat, 8 Aug 2026 02:30:10 -0500
Subject: [PATCH] Constrain the contract's return types

---
 esphome/components/ble_device_base/ble_hub.h | 9 +++++----
 1 file changed, 5 insertions(+), 4 deletions(-)

diff --git a/esphome/components/ble_device_base/ble_hub.h b/esphome/components/ble_device_base/ble_hub.h
index 7d97367846..9e94db27e1 100644
--- a/esphome/components/ble_device_base/ble_hub.h
+++ b/esphome/components/ble_device_base/ble_hub.h
@@ -13,6 +13,7 @@
 
 #include "ble_device.h"
 
+#include <concepts>
 #include <cstdint>
 
 namespace esphome::ble_device_base {
@@ -102,11 +103,11 @@ concept BLEHubContract = requires(T hub, ESPBTDeviceListener *listener, RawAdver
                                   uint8_t *mac) {
   hub.register_listener(listener);
   hub.set_raw_advertisement_callback(raw_callback);
-  T::get_capabilities();
+  { T::get_capabilities() } -> std::same_as<HubCapabilities>;
   hub.get_adapter_mac(mac);
-  hub.scan_running();
-  hub.scan_active();
-  hub.request_scan_mode(true);
+  { hub.scan_running() } -> std::same_as<bool>;
+  { hub.scan_active() } -> std::same_as<bool>;
+  { hub.request_scan_mode(true) } -> std::same_as<bool>;
 };
 
 }  // namespace esphome::ble_device_base