Re: Why structs and classes instanciations are made differently ?
On Tuesday, 25 July 2017 at 17:16:00 UTC, Kagamin wrote: On Tuesday, 25 July 2017 at 15:56:45 UTC, Houdini wrote: Yes, but it isn't the default way in C++ to do dynamic instanciation. https://github.com/isocpp/CppCoreGuidelines this? It's only 2 years old. The new operator predates it by decades. I meant : When you need to instantiate a class, you usually do : MyClass a; and not : MyClass* a = new MyClass(); You're in a value model. If you find anything in Cpp Guidelines against that, I am interested.
Re: Why structs and classes instanciations are made differently ?
On Tuesday, 25 July 2017 at 15:15:59 UTC, Kagamin wrote: C++ is big, there's always something you don't know about it. Java actually instantiates classes the C++ way: http://en.cppreference.com/w/cpp/language/new Yes, but it isn't the default way in C++ to do dynamic instanciation. Usually, you do static initialization, except when the situation make taht impossible.
Re: Why structs and classes instanciations are made differently ?
On Monday, 24 July 2017 at 17:42:30 UTC, Steven Schveighoffer wrote: In D, I would use classes for any time I need polymorphism, and use structs otherwise. OK, I'll adhere to this method. :) Thanks to all for your answers.
Re: Why structs and classes instanciations are made differently ?
On Monday, 24 July 2017 at 15:41:33 UTC, Steven Schveighoffer wrote: Because types with inheritance generally don't work right if you pass by value (i.e. the slicing problem). structs don't support inheritance or virtual functions, so they can be safely passed by value. But in C++, we pass them by reference also to avoid copies (const &). The potential polymorphic usage is not the only point to consider.
Re: Why structs and classes instanciations are made differently ?
On Monday, 24 July 2017 at 15:37:51 UTC, Andrea Fontana wrote: Maybe this will help you: https://stackoverflow.com/questions/10965577/usage-preference-between-a-struct-and-a-class-in-d-language Thanks for this informative link.
Why structs and classes instanciations are made differently ?
Hello, I am a C++ coder, and I am learning D (just reading a book, for now). D is very similar to C++ (and also grabs godd ideas from Python), but I have a naive question : why does Walter Bright chose to instanciate classes like in Java ? And why is it different for structs ?
