std::bit_not

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(C++20)

(C++20)

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plus<> (C++14)
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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)
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logical_and<> (C++14)
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logical_not<> (C++14)

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Old binders and adaptors

unary_function (until C++17*)
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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*)

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

Function object for performing bitwise NOT. Effectively callsoperator~ on typeT.

[edit]Specializations

The standard library provides a specialization ofstd::bit_not whenT is not specified, which leaves the parameter types and return type to be deduced.

bit_not<void>

(C++14)

function object implementing~x deducing parameter and return types
(class template specialization)[edit]

[edit]Member types

Type	Definition
`result_type`(deprecated in C++17)(removed in C++20)	`T`
`argument_type`(deprecated in C++17)(removed in C++20)	`T`

[edit]Member functions

operator()

(C++14)

returns the result of bitwise NOT of its argument
(public member function)

std::bit_not::operator()

constexpr T operator()(const T& arg)const;		(since C++14)

Returns the result of bitwise NOT ofarg.

Parameters

arg

value to compute bitwise NOT of

Return value

The result of~arg.

[edit]Exceptions

May throw implementation-defined exceptions.

Possible implementation

constexpr T operator()(const T& arg)const{return ~arg;}

[edit]Notes

Althoughstd::bit_not is added via post-C++11 proposalN3421, it is treated as a part of the resolution forLWG issue 660 (except for its transparent specializationstd::bit_not<>) by common implementations, and thus available in their C++98/03 mode.

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