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std::logical_not<void>

STD：：逻辑[医]不<void>

Defined in header ​​
template<> class logical_not<void>;​(since C++14)

std::logical_not<>是std::logical_not并推导出参数和返回类型。

成员类型

Member typeDefinition
is_transparent/* unspecified */

成员函数

operator()to its argument (public member function)

STD：：逻辑[医]NOT<>：：操作员%28%29

template< class T > constexpr auto operator()( T&& arg ) const -> decltype(!std::forward(arg)​​

返回!arg...

参数

arg-value to apply logical NOT to

返回值

结果!arg...

注记

成员类型is_transparent向调用方指示此函数对象是透明FunctionObject：它接受任意类型的参数，并使用完美的转发，这避免了在异构上下文中使用函数对象或使用rvalue参数时不必要的复制和转换。特别是模板函数，例如std::set::find和std::set::lower_bound在它们的Compare类型。

例

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