std::swap(std::any) (C++17) specializes thestd::swapalgorithm (function) any_cast (C++17) type-safe access to the contained object (function template) make_any (C++17) creates ananyobject (function template) He
std::any::any C++ Utilities library std::any constexprany()noexcept; (1)(since C++17) any(constany&other); (2)(since C++17) any(any&&other)noexcept; (3)(since C++17) template<classValueType> any(ValueType&&value); (4)(since C++17) ...
4,5)The program is ill-formed ifstd::is_void_v<T>istrue. Parameters operand-targetanyobject Return value 1,2)Returnsstatic_cast<T>(*std::any_cast<U>(&operand)). 3)Returnsstatic_cast<T>(std::move(*std::any_cast<U>(&operand))). ...
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Address of an lvalue may be taken: &++i[1] and &std::endl are valid expressions. (重点来了,左值是可以取地址的,这也是区分左值和右值的唯一正确的标志) A modifiable lvalue may be used as the left-hand operand of the built-in assignment and + compound assignment operators. ...
(b3==0b0011);b3^=std::bitset<4>{0b1100};assert(b3==0b1111);// operations on the whole set:b3.reset();assert(b3==0);b3.set();assert(b3==0b1111);assert(b3.all()&&b3.any()&&!b3.none());b3.flip();assert(b3==0);// operations on individual bits:b3.set(position_t(1...
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