ityp_bitset.h | Explore in Territory

// Copyright 2020 The Dawn & Tint Authors
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#ifndef SRC_DAWN_COMMON_ITYP_BITSET_H_
#define SRC_DAWN_COMMON_ITYP_BITSET_H_

#include "dawn/common/BitSetIterator.h"
#include "dawn/common/Platform.h"
#include "dawn/common/TypedInteger.h"
#include "dawn/common/UnderlyingType.h"

namespace dawn {
namespace ityp {

// ityp::bitset is a helper class that wraps std::bitset with the restriction that
// indices must be a particular type |Index|.
template <typename Index, size_t N>
class bitset : private ::std::bitset<N> { … };

}  // namespace ityp

// Assume we have bitset of at most 64 bits
// Returns i which is the next integer of the index of the highest bit
// i == 0 if there is no bit set to true
// i == 1 if only the least significant bit (at index 0) is the bit set to true with the
// highest index
// ...
// i == 64 if the most significant bit (at index 64) is the bit set to true with the highest
// index
template <typename Index, size_t N>
Index GetHighestBitIndexPlusOne(const ityp::bitset<Index, N>& bitset) { … }

}  // namespace dawn

#endif  // SRC_DAWN_COMMON_ITYP_BITSET_H_
chromium/third_party/dawn/src/dawn/common/ityp_bitset.h
