Bug 3790 – [OOP] Forwarding constructors to super class

Constructor of child class cannot pass arguments into parent constructor. See the example: class A{ final this(int a=0){ writeln(a); } } class B:A{ } B b = new B(); //prints 0 B b2 = new B(2); //throws an error "expected 0 arguments, not 1..." As we can see, logic is normal, but not in dmd. This bug creates a new bug: class A{ final this(int a=0){ writeln(a); } } class B:A{ this(int a=0){ //compiler perfectly, but parent constructor marked as "final" super(a); } } It might be not a hard problem, but it will be good for my project to create a logical, nice-look code.

Also, if we dont give argument a default value, we get an error: Error: constructor main.B.this no match for implicit super() call in constructor As i think, somebody thinks in different way with a lot of stones and problems =/

This bug report has two issues: (1) an enhancement request: allow constructors to be inherited. and (2) an accepts-invalid bug: 'final this()' is accepted, even though this() is _always_ final. Downgrading to enhancement.

Mass migration of bugs marked as x86-64 to just x86. The platform run on isn't what's relevant, it's if the app is a 32 or 64 bit app.

This is basically a feature request for forwarding of constructors. C++ has it with `using` statement, D might do it with `alias`.

Closing on the basis of Dmitry's proposed solution.