friend constexpr basic_mask
operator&&(const basic_mask& lhs, const basic_mask& rhs) noexcept;
friend constexpr basic_mask
operator||(const basic_mask& lhs, const basic_mask& rhs) noexcept;
friend constexpr basic_mask
operator& (const basic_mask& lhs, const basic_mask& rhs) noexcept;
friend constexpr basic_mask
operator| (const basic_mask& lhs, const basic_mask& rhs) noexcept;
friend constexpr basic_mask
operator^ (const basic_mask& lhs, const basic_mask& rhs) noexcept;
friend constexpr basic_mask&
operator&=(basic_mask& lhs, const basic_mask& rhs) noexcept;
friend constexpr basic_mask&
operator|=(basic_mask& lhs, const basic_mask& rhs) noexcept;
friend constexpr basic_mask&
operator^=(basic_mask& lhs, const basic_mask& rhs) noexcept;
friend constexpr basic_mask
operator==(const basic_mask&, const basic_mask&) noexcept;
friend constexpr basic_mask
operator!=(const basic_mask&, const basic_mask&) noexcept;
friend constexpr basic_mask
operator>=(const basic_mask&, const basic_mask&) noexcept;
friend constexpr basic_mask
operator<=(const basic_mask&, const basic_mask&) noexcept;
friend constexpr basic_mask
operator>(const basic_mask&, const basic_mask&) noexcept;
friend constexpr basic_mask
operator<(const basic_mask&, const basic_mask&) noexcept;
friend constexpr basic_mask simd-select-impl(
const basic_mask& mask, const basic_mask& a, const basic_mask& b) noexcept;
template<class T0, class T1>
friend constexpr vec<see below, size()>
simd-select-impl(const basic_mask& mask, const T0& a, const T1& b) noexcept;
template<size_t Bytes, class Abi>
constexpr bool all_of(const basic_mask<Bytes, Abi>& k) noexcept;
template<size_t Bytes, class Abi>
constexpr bool any_of(const basic_mask<Bytes, Abi>& k) noexcept;
template<size_t Bytes, class Abi>
constexpr bool none_of(const basic_mask<Bytes, Abi>& k) noexcept;
template<size_t Bytes, class Abi>
constexpr simd-size-type reduce_count(const basic_mask<Bytes, Abi>& k) noexcept;
template<size_t Bytes, class Abi>
constexpr simd-size-type reduce_min_index(const basic_mask<Bytes, Abi>& k);
template<size_t Bytes, class Abi>
constexpr simd-size-type reduce_max_index(const basic_mask<Bytes, Abi>& k);