std::bit_and

 

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Operator wrappers plus minus negate multiplies    divides modulus bit_and bit_or bit_not (C++14)   bit_xor equal_to not_equal_to greater less greater_equal less_equal logical_and logical_or logical_not	Transparent operator wrappers plus<> (C++14) minus<> (C++14) negate<> (C++14) multiplies<> (C++14)   divides<> (C++14) modulus<> (C++14) bit_and<> (C++14) bit_or<> (C++14) bit_not<> (C++14) bit_xor<> (C++14) equal_to<> (C++14) not_equal_to<> (C++14) greater<> (C++14) less<> (C++14) greater_equal<> (C++14) less_equal<> (C++14) logical_and<> (C++14) logical_or<> (C++14) logical_not<> (C++14)
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unary_function (until C++17*) binary_function (until C++17*) ptr_fun (until C++17*) pointer_to_unary_function (until C++17*) pointer_to_binary_function (until C++17*) mem_fun (until C++17*) mem_fun_tmem_fun1_tconst_mem_fun_tconst_mem_fun1_t (until C++17*)(until C++17*)(until C++17*)(until C++17*) not1 (until C++20*) not2 (until C++20*)	binder1stbinder2nd (until C++17*)(until C++17*) bind1stbind2nd (until C++17*)(until C++17*) mem_fun_ref (until C++17*) mem_fun_ref_tmem_fun1_ref_tconst_mem_fun_ref_tconst_mem_fun1_ref_t (until C++17*)(until C++17*)(until C++17*)(until C++17*) unary_negate (until C++20*) binary_negate (until C++20*)

 

Defined in header <functional>
template< class T > struct bit_and;		(until C++14)
template< class T = void > struct bit_and;		(since C++14)

Function object for performing bitwise AND. Effectively calls operator& on type T.

Specializations

The standard library provides a specialization of std::bit_and when T is not specified, which leaves the parameter types and return type to be deduced. bit_and<void> (C++14) function object implementing x & y deducing argument and return types (class template specialization)

(since C++14)

Member types

Type	Definition
result_type (deprecated in C++17)(removed in C++20)	T
first_argument_type (deprecated in C++17)(removed in C++20)	T
second_argument_type (deprecated in C++17)(removed in C++20)	T

These member types are obtained via publicly inheriting std::binary_function<T, T, T>.

(until C++11)

Member functions

operator()

returns the result of bitwise AND of two arguments (public member function)

std::bit_and::operator()

T operator()( const T& lhs, const T& rhs ) const;		(until C++14)
constexpr T operator()( const T& lhs, const T& rhs ) const;		(since C++14)

Returns the result of bitwise AND of lhs and rhs.

Parameters

lhs, rhs

-

values to compute bitwise AND of

Return value

The result of lhs & rhs.

Exceptions

May throw implementation-defined exceptions.

Possible implementation

constexpr T operator()(const T &lhs, const T &rhs) const { return lhs & rhs; }

Defect reports

The following behavior-changing defect reports were applied retroactively to previously published C++ standards.

DR	Applied to	Behavior as published	Correct behavior
LWG 660	C++98	function objects for bitwise operations are missing	added