From 2174e1980fd2cf5407ba8cd7cabb85d74d242ed2 Mon Sep 17 00:00:00 2001
From: Kitsune Ral <Kitsune-Ral@users.sf.net>
Date: Mon, 28 Dec 2020 18:57:07 +0100
Subject: event.h: Fix breakage of AppVeyor CI

The breakage was caused by 639f1d48.
---
 lib/events/event.h | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

(limited to 'lib/events/event.h')

diff --git a/lib/events/event.h b/lib/events/event.h
index 309ebddf..9f2f4f91 100644
--- a/lib/events/event.h
+++ b/lib/events/event.h
@@ -327,8 +327,9 @@ inline auto visit(const BaseEventT& event, FnT&& visitor)
 }
 
 namespace _impl {
+    // Using bool instead of auto below because auto apparently upsets MSVC
     template <class BaseT, typename FnT>
-    inline constexpr auto needs_downcast =
+    inline constexpr bool needs_downcast =
         std::is_base_of_v<BaseT, std::decay_t<fn_arg_t<FnT>>>
         && !std::is_same_v<BaseT, std::decay_t<fn_arg_t<FnT>>>;
 }
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