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std:: logical_not<void>

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Utilities library
Function objects
Function invocation
(C++17) (C++23)
Identity function object
(C++20)
Old binders and adaptors
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定义于头文件 <functional>
template <>
class logical_not < void > ;
(C++14 起)

std:: logical_not < void > std::logical_not 的特化版本,其参数和返回类型由编译器自动推导。

目录

嵌套类型

嵌套类型 定义
is_transparent 未指定

成员函数

operator()
对其参数应用 operator!
(公开成员函数)

std::logical_not<void>:: operator()

template < class T >

constexpr auto operator ( ) ( T && arg ) const

- > decltype ( ! std:: forward < T > ( arg ) ) ;

返回 ! std:: forward < T > ( arg ) 的结果。

参数

arg - 要应用逻辑非运算的值

返回值

! std:: forward < T > ( arg )

示例