Message from C, C++ discussions

January 2020

— Because question itself is about public interface

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Suppose, the copy constructor is not private in ostream, then if we return the called out object without reference then will the chaining operation not be supported?

— It would be

— Then we need to understand what it means to copy a stream

— Because we have the object to call operator<< on

— Dont forget that stream writes the stuff to a file. Like, would a file be copied too?

— Nah, his question is more about expression evaluation

— Imo its not the thing to bother about first here

— I didn't get the following statement below:

if for any reason a base class fails to have a default constructor that's callable from a deriving class—that is, a public or protected constructor that takes no parameters—then a class that derives from it cannot automatically generate its own default constructor.

Message permanent page

— If base class doesnt have default ctor, derived wont have it unless you provide it

— Hi

— What is this ? Why it's here?