20 General utilities library [utilities]

20.14 Function objects [function.objects]

20.14.10 Bitwise operations [bitwise.operations]

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The library provides basic function object classes for all of the bitwise operators in the language ([expr.bit.and], [expr.or], [expr.xor], [expr.unary.op]).

20.14.10.1 Class template bit_­and [bitwise.operations.and]

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template<class T = void> struct bit_and { constexpr T operator()(const T& x, const T& y) const; };
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constexpr T operator()(const T& x, const T& y) const;
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Returns: x & y.
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template<> struct bit_and<void> { template<class T, class U> constexpr auto operator()(T&& t, U&& u) const -> decltype(std::forward<T>(t) & std::forward<U>(u)); using is_transparent = unspecified; };
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template<class T, class U> constexpr auto operator()(T&& t, U&& u) const -> decltype(std::forward<T>(t) & std::forward<U>(u));
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Returns: std​::​forward<T>(t) & std​::​forward<U>(u).

20.14.10.2 Class template bit_­or [bitwise.operations.or]

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template<class T = void> struct bit_or { constexpr T operator()(const T& x, const T& y) const; };
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constexpr T operator()(const T& x, const T& y) const;
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Returns: x | y.
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template<> struct bit_or<void> { template<class T, class U> constexpr auto operator()(T&& t, U&& u) const -> decltype(std::forward<T>(t) | std::forward<U>(u)); using is_transparent = unspecified; };
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template<class T, class U> constexpr auto operator()(T&& t, U&& u) const -> decltype(std::forward<T>(t) | std::forward<U>(u));
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Returns: std​::​forward<T>(t) | std​::​forward<U>(u).

20.14.10.3 Class template bit_­xor [bitwise.operations.xor]

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template<class T = void> struct bit_xor { constexpr T operator()(const T& x, const T& y) const; };
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constexpr T operator()(const T& x, const T& y) const;
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Returns: x ^ y.
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template<> struct bit_xor<void> { template<class T, class U> constexpr auto operator()(T&& t, U&& u) const -> decltype(std::forward<T>(t) ^ std::forward<U>(u)); using is_transparent = unspecified; };
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template<class T, class U> constexpr auto operator()(T&& t, U&& u) const -> decltype(std::forward<T>(t) ^ std::forward<U>(u));
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Returns: std​::​forward<T>(t) ^ std​::​forward<U>(u).

20.14.10.4 Class template bit_­not [bitwise.operations.not]

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template<class T = void> struct bit_not { constexpr T operator()(const T& x) const; };
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constexpr T operator()(const T& x) const;
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Returns: ~x.
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template<> struct bit_not<void> { template<class T> constexpr auto operator()(T&& t) const -> decltype(~std::forward<T>(t)); using is_transparent = unspecified; };
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template<class T> constexpr auto operator()(T&&) const -> decltype(~std::forward<T>(t));
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Returns: ~std​::​forward<T>(t).