From 97793c700eaa68358d768826a58feee21742ac57 Mon Sep 17 00:00:00 2001
From: Curve <fynnbwdt@gmail.com>
Date: Sat, 17 Aug 2024 16:37:52 +0200
Subject: [PATCH] fix: disable `use_bool_op` in objective c (#32)

---
 include/function2/function2.hpp | 7 ++++++-
 1 file changed, 6 insertions(+), 1 deletion(-)

diff --git a/include/function2/function2.hpp b/include/function2/function2.hpp
index ffb82b5..d84ea2d 100644
--- a/include/function2/function2.hpp
+++ b/include/function2/function2.hpp
@@ -1408,7 +1408,12 @@ struct accepts_all<
     void_t<std::enable_if_t<accepts_one<T, Signatures>::value>...>>
     : std::true_type {};
 
-#if defined(FU2_HAS_NO_EMPTY_PROPAGATION)
+#if defined(__OBJC__)
+/// In Objective C lambdas can be implicitly converted to block pointers,
+/// thus causing the copy constructor to be invoked.
+template <typename T>
+struct use_bool_op : std::false_type {};
+#elif defined(FU2_HAS_NO_EMPTY_PROPAGATION)
 template <typename T>
 struct use_bool_op : std::false_type {};
 #elif defined(FU2_HAS_LIMITED_EMPTY_PROPAGATION)