Flags.h

#pragma once
 
// Require Max 32bit enums for Cogs.js support.
#define ENABLE_ENUM_FLAGS(EnumType) \
  static_assert(sizeof(EnumType) <= sizeof(uint32_t)); \
  constexpr EnumType operator~(EnumType lhs) { return static_cast<EnumType>(~static_cast<uint32_t>(lhs)); } \
  constexpr EnumType operator|(EnumType lhs, EnumType rhs) { return static_cast<EnumType>(static_cast<uint32_t>(lhs) | static_cast<uint32_t>(rhs)); } \
  constexpr EnumType operator&(EnumType lhs, EnumType rhs) { return static_cast<EnumType>(static_cast<uint32_t>(lhs) & static_cast<uint32_t>(rhs)); } \
  constexpr EnumType & operator|=(EnumType & lhs, EnumType rhs) { lhs = static_cast<EnumType>(static_cast<uint32_t>(lhs) | static_cast<uint32_t>(rhs)); return lhs; } \
  constexpr EnumType & operator&=(EnumType & lhs, EnumType rhs) { lhs = static_cast<EnumType>(static_cast<uint32_t>(lhs) & static_cast<uint32_t>(rhs)); return lhs; } \
  constexpr bool operator==(EnumType lhs, uint32_t rhs) { return static_cast<uint32_t>(lhs) == rhs; } \
  constexpr bool operator!=(EnumType lhs, uint32_t rhs) { return static_cast<uint32_t>(lhs) != rhs; }
 
#define ENABLE_DERIVED_FLAGS(EnumType, BaseType) \
  static_assert(sizeof(EnumType) <= sizeof(uint32_t)); \
  constexpr EnumType operator|(EnumType lhs, BaseType rhs) { return static_cast<EnumType>(static_cast<uint32_t>(lhs) | static_cast<uint32_t>(rhs)); } \
  constexpr EnumType operator&(EnumType lhs, BaseType rhs) { return static_cast<EnumType>(static_cast<uint32_t>(lhs) & static_cast<uint32_t>(rhs)); }