Can I initialize a member with other members ?
Yes, as long as those other members have already been initialised; i.e. as long as their declarations come before the member being initialised.
Are [the copy constructor] and [the copy-assignment operator] the only functions automatically added by the compiler ?
It will also implicitly declare a destructor, which will destroy _x
using its destructor.
In C++11, a move constructor (Class(Class&&)
) and move-assignment operator (Class& operator=(Class&&)
) are also implicitly declared, unless you declare a copy or move constructor, or a copy or move assignment operator.
Note that your constructor template is not a copy constructor, and the implicit one will be used instead:
Class<T1> t1;
Class<T1>(t1); // prints nothing
Class<T2>(t1); // prints "My copy constructor" (which is a lie)
Is this behaviour perfectly normal according to the standard ?
Yes, see chapter 12.
Do I have the guarantee that an empty constructor is not automatically added and that
Class<int> x;
will write"My normal constructor"
?
Yes, a default constructor will only be implicitly declared if you don't declare any constructors at all.