al/eax/fx_slot_index.h

   1 #ifndef EAX_FX_SLOT_INDEX_INCLUDED
   2 #define EAX_FX_SLOT_INDEX_INCLUDED
   3
   4
   5 #include <cstddef>
   6
   7 #include "aloptional.h"
   8 #include "api.h"
   9
  10
  11 using EaxFxSlotIndexValue = std::size_t;
  12
  13 class EaxFxSlotIndex : public al::optional<EaxFxSlotIndexValue>
  14 {
  15 public:
  16     using al::optional<EaxFxSlotIndexValue>::optional;
  17
  18     EaxFxSlotIndex& operator=(const EaxFxSlotIndexValue &value) { set(value); return *this; }
  19     EaxFxSlotIndex& operator=(const GUID &guid) { set(guid); return *this; }
  20
  21     void set(EaxFxSlotIndexValue index);
  22     void set(const GUID& guid);
  23
  24 private:
  25     [[noreturn]]
  26     static void fail(const char *message);
  27 }; // EaxFxSlotIndex
  28
  29 inline bool operator==(const EaxFxSlotIndex& lhs, const EaxFxSlotIndex& rhs) noexcept
  30 {
  31     if(lhs.has_value() != rhs.has_value())
  32         return false;
  33     if(lhs.has_value())
  34         return *lhs == *rhs;
  35     return true;
  36 }
  37
  38 inline bool operator!=(const EaxFxSlotIndex& lhs, const EaxFxSlotIndex& rhs) noexcept
  39 { return !(lhs == rhs); }
  40
  41 #endif // !EAX_FX_SLOT_INDEX_INCLUDED