[Note: the interpretation of the call of a virtual function depends on the type of the object for which it is called (the dynamic type), whereas the interpretation of a call of a nonvirtual member function depends only on the type of the pointer or reference denoting that object (the stat...
But while it's logical, this behavior can cause bugs. As a general rule, you should never call a virtual function from a constructor or destructor unless you intend the call to be non-virtual. A similar thing happens with the vtables during destruction. Before your destruction code executes...
Only that's not really true. Let's take item (1) first: there are many cases in which a virtual function is resolved statically — essentially any time a derived class virtual method invokes the method of its base class(es). Why would one do that? Encapsulation. A good example is the...
In C++, if you call a virtual function from a constructor or destructor, the compiler calls the instance of the virtual function defined for the class being constructed (for example, Base::SomeVirtFn if called from Base::Base), not the most derived instance. As you say...
CFoo:: GetVal, it will instantiate it as a static function in mumble.cpp. If 10 modules include foo.h, the compiler could generate up to 10 copies of your virtual function. In fact, you could end up with objects of the same type with vtables pointing to different copies of GetVal. ...
Network (Virtual Networks, Static Public IPs, Public IPs, Network Security Groups, Network Interfaces, Load Balancers, Route Tables) Azure CLI 复制 az network list-usages -l <azure-region> -o jsonc Storage (Storage Account) Azure CLI 复制 az storage account show-usage Azure Resource Man...
Instead, the table definitions can be retrieved from a P_S function as SQL DDL statements, which can then be executed by the DD initialization code. A mechanism similar to what the server and the DDSE uses for allowing the server to create tables on behalf the DDSE, may be used. The ...
Only that's not really true. Let's take item (1) first: there are many cases in which a virtual function is resolved statically — essentially any time a derived class virtual method invokes the method of its base class(es). Why would one do that? Encapsulation. A good example is the...
The system comprises a controller for instructing to generate a hash value indicating a class of an object and an encryption key for encrypting a virtual function table pointer of the class, when the object is generated; a memory management unit for receiving the instruction from the control ...
generated Thread name Name of the thread in the process where the log event occurs Invoked function Class to which a run log belongs and name of the function that is invoked Content Log details, including the description and required contextLog Example ...