c++: Added struct and support for pack interpretation

1 files changed, 16 insertions, 0 deletions

diff --git a/src/core/templates.h b/src/core/templates.h
new file mode 100644
index 0000000..833bb5b
--- /dev/null
+++ b/src/core/templates.h
@@ -0,0 +1,16 @@
+#pragma once
+
+namespace saw {
+
+template <class T, class... TL> struct parameter_pack_index;
+
+template <class T, class... TL> struct parameter_pack_index<T, T, TL...> {
+	static constexpr size_t value = 0u;
+};
+
+template <class T, class TL0, class... TL>
+struct parameter_pack_index<T, TL0, TL...> {
+	static constexpr size_t value =
+		1u + parameter_pack_index<T, TL...>::value;
+};
+}