...

cxx/mount_pz.h

@@ -4,6 +4,43 @@
 
 namespace mcc
 {
+
+namespace traits
+{
+
+template <typename T>
+concept mcc_prohibited_zone_c = requires(T t, const T const_t) {
+    typename T::pzcoords_kind_t;
+
+    { const_t.name() } -> std::same_as<std::string_view>;
+    { const_t.desc() } -> std::same_as<std::string_view>;
+
+    // check if given coordinates are within the zone
+    {
+        t.inZone(std::declval<const MccCoordinate&>(), std::declval<const MccCoordinate&>(),
+                 std::declval<typename T::pzcoords_kind_t>())
+    } -> std::convertible_to<bool>;
+
+    //  a time duration to reach the zone (0 - if already in the zone, chrono::duration<>::max() if never
+    //  reach the zone)
+    {
+        t.timeTo(std::declval<const MccCoordinate&>(), std::declval<const MccCoordinate&>(),
+                 std::declval<typename T::pzcoords_kind_t>(),
+                 std::declval<const std::chrono::system_clock::time_point&>())
+    } -> mcc_time_duration_c;
+
+    // a time duration to exit the zone (0 - if already out of the zone, chrono::duration<>::max() if
+    // never exit the zone)
+    {
+        t.timeFrom(std::declval<const MccCoordinate&>(), std::declval<const MccCoordinate&>(),
+                   std::declval<typename T::pzcoords_kind_t>(),
+                   std::declval<const std::chrono::system_clock::time_point&>())
+    } -> mcc_time_duration_c;
+};
+
+}  // namespace traits
+
+
 class MccProhibitedZone
 {
 public: