kfr

commit d03383a46cdfb1eac9b1a7c27c1b697603546392
parent a94f01f6c74dc7eaa5875fac4eab0e0e5718f19e
Author: d.levin256@gmail.com <d.levin256@gmail.com>
Date:   Fri, 31 Mar 2017 22:51:49 +0300

CoMeta: is_sequence function

Diffstat:
M
include/kfr/cometa.hpp
 | 
21
+++++++++++++++++++++

1 file changed, 21 insertions(+), 0 deletions(-)
diff --git a/include/kfr/cometa.hpp b/include/kfr/cometa.hpp
@@ -1630,6 +1630,27 @@ CMT_INLINE constexpr static T implicit_cast(U&& value)
     return std::forward<T>(value);
 }
 
+namespace details
+{
+template <size_t start, size_t count>
+constexpr std::true_type test_sequence(csizeseq_t<count, start>)
+{
+    return {};
+}
+
+template <size_t, size_t>
+constexpr std::false_type test_sequence(...)
+{
+    return {};
+}
+}
+
+template <size_t number, size_t... numbers>
+constexpr bool is_sequence(csizes_t<number, numbers...>)
+{
+    return details::test_sequence<number, 1 + sizeof...(numbers)>(csizes_t<number, numbers...>()).value;
+}
+
 #ifdef CMT_COMPILER_GNU
 
 template <typename T, T val>