trivial constructor

[bml]

Is "Trivial constructor" either a default constructor generated by compiler
or the one you write but it does nothing (empty inside method definition)?

Is it required by C++ standard to bypass "construction" in case of trivial
constructor, or just implementation-dependent?

In which cases is a construction bypassed?

Thanks a lot!

 

[Ron Natalie]

Is "Trivial constructor" either a default constructor generated by compiler
or the one you write but it does nothing (empty inside method definition)?

Is it required by C++ standard to bypass "construction" in case of trivial
constructor, or just implementation-dependent?

In which cases is a construction bypassed?

To answer the questions in reverse order. No construction occurs when the
constructor is trivial.

However, for a class to have a trivial constructor means more than it just has
the compiler generated one. The class also needs to have no virtual functions,
no virtual bases, and all of it's subobjects (bases and non-static members) must
also have trivial constructors.