kfr

commit 12c59131aaa8112f4790a70a173a7440cb65b991
parent 722795a6d21aa85bc7150c11c82c1bdb3140935d
Author: d.levin256@gmail.com <d.levin256@gmail.com>
Date:   Thu,  6 Oct 2016 02:56:29 +0300

MSVS-compatible implementations of and_t and or_t

Diffstat:
M
include/kfr/cometa.hpp
 | 
26
+++++++++++++++++++++-----

1 file changed, 21 insertions(+), 5 deletions(-)
diff --git a/include/kfr/cometa.hpp b/include/kfr/cometa.hpp
@@ -89,17 +89,33 @@ template <typename T>
 struct is_pod_impl<T, void_t<decltype(T::is_pod)>> : std::integral_constant<bool, T::is_pod>
 {
 };
-}
 
 template <typename... Ts>
-struct or_t : std::integral_constant<bool, details::args_or(Ts::value...)>
+struct or_t_impl: std::false_type
+{
+};
+
+template <typename T, typename... Ts>
+struct or_t_impl<T, Ts...>: std::integral_constant<bool, T::value || or_t_impl<Ts...>::value>
 {
 };
 
 template <typename... Ts>
-struct and_t : std::integral_constant<bool, details::args_and(Ts::value...)>
+struct and_t_impl: std::true_type
+{
+};
+
+template <typename T, typename... Ts>
+struct and_t_impl<T, Ts...>: std::integral_constant<bool, T::value && and_t_impl<Ts...>::value>
 {
 };
+}
+
+template <typename... Ts>
+using or_t = details::or_t_impl<Ts...>;
+
+template <typename... Ts>
+using and_t = details::and_t_impl<Ts...>;
 
 template <typename T>
 struct not_t : std::integral_constant<bool, !T::value>
@@ -794,13 +810,13 @@ struct is_returning_type : details::is_returning_type_impl<Ret, T>
 
 namespace details
 {
-template <typename Fn, CMT_ENABLE_IF(is_callable<Fn()>())>
+template <typename Fn, CMT_ENABLE_IF(is_callable<Fn()>::value)>
 inline auto call_if_callable(Fn&& fn)
 {
     return fn();
 }
 
-template <typename Fn, CMT_ENABLE_IF(!is_callable<Fn()>())>
+template <typename Fn, CMT_ENABLE_IF(!is_callable<Fn()>::value)>
 inline auto call_if_callable(Fn&& fn)
 {
     return std::forward<Fn>(fn);