concepts: define note port

include/avnd/concepts/note_port.hpp

@@ -0,0 +1,25 @@
+#pragma once
+
+/* SPDX-License-Identifier: GPL-3.0-or-later OR BSL-1.0 OR CC0-1.0 OR CC-PDCC OR 0BSD */
+
+#include <avnd/common/concepts_polyfill.hpp>
+#include <avnd/concepts/generic.hpp>
+#include <avnd/concepts/midi.hpp>
+
+namespace avnd
+{
+
+// Note ports
+// FIXME MPE, etc.
+template <typename T>
+concept note_port = requires(T t) { t.notes; };
+
+template <typename T>
+concept dynamic_container_notes = note_port<T> && vector_ish<decltype(T::midi_messages)>;
+
+template <typename T>
+concept raw_container_note_port
+    = note_port<T> && std::is_pointer_v<decltype(T::midi_messages)>
+      && std::is_integral_v<decltype(T::size)>;
+
+}