From c0f7b068216dac8a3daa821cf5288b67d37b4082 Mon Sep 17 00:00:00 2001
From: "Timur A. Fatkhullin" <timur@sao.ru>
Date: Wed, 25 Jun 2025 12:02:50 +0300
Subject: [PATCH] ...

---
 cxx/mcc_mount_pec.h | 32 ++++++++++++++++++++++++++++++++
 1 file changed, 32 insertions(+)
 create mode 100644 cxx/mcc_mount_pec.h

diff --git a/cxx/mcc_mount_pec.h b/cxx/mcc_mount_pec.h
new file mode 100644
index 0000000..2dcb442
--- /dev/null
+++ b/cxx/mcc_mount_pec.h
@@ -0,0 +1,32 @@
+#pragma once
+
+#include "mcc_mount_coord.h"
+
+namespace mcc
+{
+
+class MccMountPEC
+{
+public:
+    struct pec_result_t {
+        MccAngle dx, dy;
+    };
+
+    template <std::derived_from<MccAngle> XT, std::derived_from<MccAngle> YT>
+    pec_result_t compute(const XT& x, const YT& y)
+    {
+        static constexpr MccCoordPairKind coord_kind = traits::mcc_type_pair_hash<XT, YT>();
+
+        pec_result_t res;
+
+        if constexpr (coord_kind == MccCoordPairKind::COORDS_KIND_HADEC_APP) {
+        } else if constexpr (coord_kind == MccCoordPairKind::COORDS_KIND_AZALT) {
+        } else {
+            static_assert(false, "UNSUPPORTED");
+        }
+
+        return res;
+    }
+};
+
+}  // namespace mcc