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c++ Programming Glossary: vtablesWhy is the C++ STL is so heavily based on templates? (and not on *interfaces*) http://stackoverflow.com/questions/1039853/why-is-the-c-stl-is-so-heavily-based-on-templates-and-not-on-interfaces compiling the template for each used type instead of using vtables. And the fact that templates can be used with native types...
http://stackoverflow.com/questions/1742848/why-exactly-do-i-need-an-explicit-upcast-when-implementing-queryinterface-in-a you can't just extend the vtable you need multiple vtables depending on which branch you're talking about. So you need..
when is a v-table created in C++? http://stackoverflow.com/questions/1963926/when-is-a-v-table-created-in-c c vtable share improve this question Beyond vtables are implementation specific which they are if a vtable is used.. which they are if a vtable is used there will be unique vtables for each of your classes. Even though B f and C f are not declared.. instances and C f similarly for C instances you need three vtables. You generally shouldn't worry about such details. What matters..
http://stackoverflow.com/questions/2038717/object-size-with-virtual 0 for any pointer to an object. This implies multiple vtables for multiple inheritance. Couple questions here I'll start at.. class B 8 vfptr 12 b 16 c You are correct there are two vtables one for each base class. This is how it works in multiple inheritance..
Why can I access a derived private member function via a base class pointer to a derived object? http://stackoverflow.com/questions/3610936/why-can-i-access-a-derived-private-member-function-via-a-base-class-pointer-to-a problem with how this is implemented. I understand you use vtables and the vtable of derived contains the address of the new add..
Virtual dispatch implementation details http://stackoverflow.com/questions/3972548/virtual-dispatch-implementation-details clear that I do understand that there is no notion of vtables and vptrs in the C standard . However I think that virtually.. class X is interpreted as a call to x.vptr f's position in vtables The questions are 1. Do I have any errors in the above description.. compilers compose a new vtable which consists of all the vtables of the virtual bases appended together in the order they were..
Alternative virtual mechanism implementations? http://stackoverflow.com/questions/4352032/alternative-virtual-mechanism-implementations semantics complex mixin objects lead to massive sets of vtables being generated large objects and slow object initialisation...
Is there any reason to use C instead of C++ for embedded development? http://stackoverflow.com/questions/812717/is-there-any-reason-to-use-c-instead-of-c-for-embedded-development using C with classes but without polymorphism to avoid vtables . The main reasons I ™d like to use C are I prefer to use śinline..
At as deep of a level as possible, how are virtual functions implemented? http://stackoverflow.com/questions/99297/at-as-deep-of-a-level-as-possible-how-are-virtual-functions-implemented Also note the C language spec does not specify that vtables are required however that is how most compilers implement virtual.. on the implementation since the spec doesn't require vtables in the first place. However in practice I believe all modern..
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