kfr

commit 51111bd019c87aade9a268a0a3ef4975c737c875
parent 712e1788d92c45c05e27ab98051d32a2c44a4781
Author: d.levin256@gmail.com <d.levin256@gmail.com>
Date:   Thu, 10 Nov 2022 15:17:45 +0000

has_expression_traits

Diffstat:
M
include/kfr/base/expression.hpp
 | 
6
++++++

1 file changed, 6 insertions(+), 0 deletions(-)
diff --git a/include/kfr/base/expression.hpp b/include/kfr/base/expression.hpp
@@ -126,6 +126,12 @@ struct expression_traits_defaults
     constexpr static inline bool random_access    = true;
 };
 
+template <typename T, typename = void>
+constexpr inline bool has_expression_traits = false;
+
+template <typename T>
+constexpr inline bool has_expression_traits<T, std::void_t<typename expression_traits<T>::value_type>> = true;
+
 namespace internal_generic
 {
 template <typename... Xs>