c++,core: Fixed compile time multiplication naming

1 files changed, 18 insertions, 2 deletions

diff --git a/c++/core/templates.h b/c++/core/templates.h
index a3a5f7a..e704f37 100644
--- a/c++/core/templates.h
+++ b/c++/core/templates.h
@@ -70,7 +70,23 @@ template <size_t i, string_literal... Keys>
 struct parameter_key_pack_type {
 	static constexpr string_literal literal = parameter_key_pack_type_helper<i, 0, Keys...>::literal;
 
-	static_assert(i < sizeof...(Keys), "Provided index is too large in list");
+	static_assert(i < sizeof...(Keys), "Provided index is too large for list");
+};
+
+template<std::size_t i, std::size_t s, typename T, T V0, T... VN>
+struct parameter_pack_value_helper {
+	static constexpr T value = parameter_pack_value_helper<i, s+1, T, VN...>::value;
+};
+
+template<std::size_t i, typename T, T V0, T... VN>
+struct parameter_pack_value_helper<i, i, T, V0, VN...> {
+	static constexpr T value = V0;
+};
+
+template<std::size_t i, typename T, T... Values>
+struct parameter_pack_value {
+	static constexpr T value = parameter_pack_value_helper<i, 0, T, Values...>::value;
+	static_assert(i < sizeof...(Values), "Provided index is too large for list");
 };
 
 template<typename T, T... V>
@@ -83,7 +99,7 @@ struct ct_multiply<T> {
 
 template<typename T, T V0, T... VN>
 struct ct_multiply<T, V0, VN...> {
-	static constexpr T value = V0 * templ_multiply<T,VN...>::value;
+	static constexpr T value = V0 * ct_multiply<T,VN...>::value;
 };
 
 }