chromium/third_party/dawn/include/webgpu/webgpu_enum_class_bitmasks.h

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#ifndef WEBGPU_ENUM_CLASS_BITMASKS_H_
#define WEBGPU_ENUM_CLASS_BITMASKS_H_

#include <type_traits>

// The operators in wgpu:: namespace need be introduced into other namespaces with
// using-declarations for C++ Argument Dependent Lookup to work.
#define WGPU_IMPORT_BITMASK_OPERATORS …

namespace wgpu {

template <typename T>
struct IsWGPUBitmask { … };

template <typename T, typename Enable = void>
struct LowerBitmask { … };

LowerBitmask<T, typename std::enable_if<IsWGPUBitmask<T>::enable>::type>;

template <typename T>
struct BoolConvertible { … };

LowerBitmask<BoolConvertible<T>>;

template <
    typename T1,
    typename T2,
    typename = typename std::enable_if<LowerBitmask<T1>::enable && LowerBitmask<T2>::enable>::type>
constexpr BoolConvertible<typename LowerBitmask<T1>::type> operator|(T1 left, T2 right) { … }

template <
    typename T1,
    typename T2,
    typename = typename std::enable_if<LowerBitmask<T1>::enable && LowerBitmask<T2>::enable>::type>
constexpr BoolConvertible<typename LowerBitmask<T1>::type> operator&(T1 left, T2 right) { … }

template <
    typename T1,
    typename T2,
    typename = typename std::enable_if<LowerBitmask<T1>::enable && LowerBitmask<T2>::enable>::type>
constexpr BoolConvertible<typename LowerBitmask<T1>::type> operator^(T1 left, T2 right) { … }

template <typename T1>
constexpr BoolConvertible<typename LowerBitmask<T1>::type> operator~(T1 t) { … }

template <
    typename T,
    typename T2,
    typename = typename std::enable_if<IsWGPUBitmask<T>::enable && LowerBitmask<T2>::enable>::type>
constexpr T& operator&=(T& l, T2 right) { … }

template <
    typename T,
    typename T2,
    typename = typename std::enable_if<IsWGPUBitmask<T>::enable && LowerBitmask<T2>::enable>::type>
constexpr T& operator|=(T& l, T2 right) { … }

template <
    typename T,
    typename T2,
    typename = typename std::enable_if<IsWGPUBitmask<T>::enable && LowerBitmask<T2>::enable>::type>
constexpr T& operator^=(T& l, T2 right) { … }

template <typename T>
constexpr bool HasZeroOrOneBits(T value) { … }

}  // namespace wgpu

#endif  // WEBGPU_ENUM_CLASS_BITMASKS_H_