chromium/third_party/dawn/src/tint/utils/containers/enum_set.h

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#ifndef SRC_TINT_UTILS_CONTAINERS_ENUM_SET_H_
#define SRC_TINT_UTILS_CONTAINERS_ENUM_SET_H_

#include <cstdint>
#include <functional>
#include <type_traits>
#include <utility>

#include "src/tint/utils/math/hash.h"
#include "src/tint/utils/traits/traits.h"

namespace tint {

/// EnumSet is a set of enum values.
/// @note As the EnumSet is backed by a single uint64_t value, it can only hold
/// enum values in the range [0 .. 63].
template <typename ENUM>
struct EnumSet { … };

/// Writes the EnumSet to the stream.
/// @param out the stream to write to
/// @param set the EnumSet to write
/// @returns out so calls can be chained
template <typename STREAM, typename ENUM, typename = traits::EnableIfIsOStream<STREAM>>
auto& operator<<(STREAM& out, EnumSet<ENUM> set) { … }

}  // namespace tint

#endif  // SRC_TINT_UTILS_CONTAINERS_ENUM_SET_H_