I know that virtual functions have an overhead of dereferencing to call a method. But I guess with modern architectural speed it is almost negligible.
This question already has answers here: Closed 11 years ago. Possible Duplicate: GCC C++ Linker errors: Undefined reference to 'vtable for XXX', Undefined reference to 'ClassName::
I have a very strange problem, which took already several hours of my attention: With giving a wrong input to the software I am working on, I can produce an exception (which is of course intended). Th
There is one little related question. But the topic is entirely different. Now, one co开发者_如何学JAVAncept is about the function resolution and another is about class resolution ? I am wondering th
I just compiled the following on VS2010(with optimization turned off). class Shape { public: int x,y; Shape() {
I just read recently that its a good practice to implement C++ destructors as virtual functions[1]. Why is this so? Is this a general good practice? If not, in what conditions/case开发者_C百科s is a d
What does the keyword virtual do when overriding a method? I\'m not using it and everything works fine.
I have this weird bug, where C++ calls the wrong function: So this bit of code get called: class FmeGrid
Imagine this simple base class: struct simple_http_service { virtual reply http_get(…); virtual reply http_post(…);
struct A { virtual void foo();// unused and unimplemented virtual void bar () {} }; int main () { A obj;// ok
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