Seed Core_IO from doc snapshot

tjp/core/io/calls.hpp

@@ -0,0 +1,38 @@
+// License: Modified MIT (NON-AI)
+// See the LICENSE file in the root directory for license information.
+// Copyright 2025 Timothy Prepscius
+
+#pragma once
+
+#include <tuple>
+#include <utility>
+
+namespace tjp::core::io {
+
+template<typename F, typename... Args>
+void call_f_1s(F&& f, Args&&... args) {
+    (f(std::forward<Args>(args)), ...);
+}
+
+template<typename F, typename Tuple, std::size_t... I>
+void call_f_2s_(F &&f, Tuple&& tup, std::index_sequence<I...>) {
+	(f(
+		std::forward<decltype(std::get<I * 2>(std::forward<Tuple>(tup)))>(
+			std::get<I * 2>(std::forward<Tuple>(tup))),
+		std::forward<decltype(std::get<I * 2 + 1>(std::forward<Tuple>(tup)))>(
+			std::get<I * 2 + 1>(std::forward<Tuple>(tup)))
+	), ...);
+}
+
+template<typename F, typename... Args>
+void call_f_2s(F &&f, Args&&... args)
+{
+	static_assert(sizeof...(Args) % 2 == 0, "Arguments must be in key-value pairs");
+
+	auto args_tuple = std::forward_as_tuple(std::forward<Args>(args)...);
+	constexpr std::size_t N = sizeof...(Args) / 2;
+
+	call_f_2s_(std::forward<F>(f), args_tuple, std::make_index_sequence<N>{});
+}
+
+} // namespace