Feature-testmacroValueStdFeature __cpp_lib_any201606L(C++17)std::any Example Run this code #include <any>#include <iostream>intmain(){std::cout<<std::boolalpha;// any typestd::anya=1;std::cout<<a.type().name()<<
any(any&&other)noexcept; (3)(since C++17) template<classValueType> any(ValueType&&value); (4)(since C++17) template<classValueType,class...Args> explicitany(std::in_place_type_t<ValueType>, Args&&...args); (5)(since C++17)
std::any:: std::any::type From cppreference.com conststd::type_info&type()constnoexcept; (since C++17) Queries the contained type. Parameters (none) Return value Thetypeidof the contained value if instance is non-empty, otherwisetypeid(void)....
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std::condition_variable_anycan be used withstd::shared_lockin order to wait on astd::shared_mutexin shared ownership mode. A possible use forstd::condition_variable_anywith customLockabletypes is to provide convenient interruptible waits: the custom lock operation would both lock the associated ...
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. ...
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(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...