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6 mars 2010 · tbh, virtual functions are staple feature of OOP, for type erasure. I think, it's non-virtual methods are what is making Object Pascal and C++ special, being optimization of unnecessary big vtable and allowing POD-compatible classes. Many OOP languages expect that every method can be overriden. –
19 févr. 2015 · B* pb = &c; pb->foo(); // uses the virtual function. pb->B::foo(); // but you can force to use the function, ignoring the virtuality. Possible approach using a virtual and a non virtual function. With little additional cost you could emulate this behaviour in your code, using a comibnation of 2 functions: a private virtual one, and a public non ...
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1. if you declare your property virtual : Your virtual property (by default) won't be loaded right away when querying the main object. It will be retreive from the database ONLY if you try to access it, or access one of it's components. And this is called lazy loading. 2. if you declare it non-virtual :
12 janv. 2013 · In those rare cases where the C# compiler proves that a non-virtual call cannot possibly have a null receiver, it falls back to call and saves the nanosecond it takes to do the null check. For example, if you have (new C()).InstanceMethod() then that should be generated as call, not callvirt because the compiler knows that the receiving ...
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7 janv. 2012 · If a class has a virtual method, that means you want other classes to inherit from it. These classes could be destroyed through a base-class-reference or pointer, but this would only work if the base-class has a virtual destructor.
