index_types.h

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#ifndef joedb_index_types_declared
#define joedb_index_types_declared
 
#include <stdint.h>
#include <stddef.h>
#include <stdlib.h>
#include <type_traits>
 
namespace joedb
{
 /// @ingroup joedb
 enum class Table_Id: uint16_t {};
 
 /// @ingroup joedb
 enum class Field_Id: uint16_t {};
 
 /// @ingroup joedb
 enum class Record_Id: ptrdiff_t {};
 
 constexpr inline std::underlying_type<Table_Id>::type to_underlying
 (
  Table_Id id
 )
 {
  return std::underlying_type<Table_Id>::type(id);
 }
 
 constexpr inline std::underlying_type<Field_Id>::type to_underlying
 (
  Field_Id id
 )
 {
  return std::underlying_type<Field_Id>::type(id);
 }
 
 constexpr inline std::underlying_type<Record_Id>::type to_underlying
 (
  Record_Id id
 )
 {
  return std::underlying_type<Record_Id>::type(id);
 }
 
 constexpr inline Record_Id operator+(Record_Id id, size_t size)
 {
  return Record_Id(to_underlying(id) + size);
 }
 constexpr inline Record_Id operator-(Record_Id id, size_t size)
 {
  return Record_Id(to_underlying(id) - size);
 }
 
 inline Table_Id &operator++(Table_Id &id)
 {
  return id = Table_Id(to_underlying(id) + 1);
 }
 inline Field_Id &operator++(Field_Id &id)
 {
  return id = Field_Id(to_underlying(id) + 1);
 }
 inline Record_Id &operator++(Record_Id &id)
 {
  return id = id + 1;
 }
 inline Record_Id &operator--(Record_Id &id)
 {
  return id = id - 1;
 }
}
 
#endif