kfr

commit e6fc78f462c9872d7867d83533ddf2438063c097
parent 51a01e140c8259bdfbe9c7ca98a3102ae4b92c61
Author: d.levin256@gmail.com <d.levin256@gmail.com>
Date:   Mon, 12 Sep 2016 15:08:27 +0300

Expression for horner function

Diffstat:
M
include/kfr/base/operators.hpp
 | 
8
+++++++-

1 file changed, 7 insertions(+), 1 deletion(-)
diff --git a/include/kfr/base/operators.hpp b/include/kfr/base/operators.hpp
@@ -486,13 +486,19 @@ constexpr CMT_INLINE common_type<T1, T2, T3, Ts...> horner(const T1& x, const T2
 /// @brief Calculate polynomial using Horner's method
 ///
 /// ``horner(x, 1, 2, 3)`` is equivalent to \(3x^2 + 2x + 1\)
-template <typename T1, typename... Ts>
+template <typename T1, typename... Ts, KFR_ENABLE_IF(is_numeric_args<T1, Ts...>::value)>
 constexpr CMT_INLINE common_type<T1, Ts...> horner(const T1& x, const Ts&... c)
 {
     return internal::horner(x, c...);
 }
 KFR_FN(horner)
 
+template <typename... E, KFR_ENABLE_IF(is_input_expressions<E...>::value)>
+CMT_INLINE internal::expression_function<fn::horner, E...> horner(E&&... x)
+{
+    return { fn::horner(), std::forward<E>(x)... };
+}
+
 /// @brief Calculate Multiplicative Inverse of `x`
 /// Returns `1/x`
 template <typename T>