www.digitalmars.com         C & C++   DMDScript  

digitalmars.D.bugs - [Issue 4679] New: Problem with final & override

reply d-bugmail puremagic.com writes:
http://d.puremagic.com/issues/show_bug.cgi?id=4679

           Summary: Problem with final & override
           Product: D
           Version: D2
          Platform: x86
        OS/Version: Windows
            Status: NEW
          Severity: normal
          Priority: P2
         Component: DMD
        AssignedTo: nobody puremagic.com
        ReportedBy: bearophile_hugs eml.cc


--- Comment #0 from bearophile_hugs eml.cc 2010-08-19 06:22:41 PDT ---
This D2 program compiles and runs with DMD 2.048 with no errors:


import std.c.stdio: puts;
class Base {
    this() { foo(); }
    private void foo() { puts("Base.foo"); } // called
}
class Derived : Base {
    private override void foo() { // not called
        puts("Derived.foo");
        super.foo();
    }
}
void main() {
    auto d = new Derived();
}


Output:
Base.foo


If Base.foo() is private then it's final. Then what is Derived.foo()
overriding?

-- 
Configure issuemail: http://d.puremagic.com/issues/userprefs.cgi?tab=email
------- You are receiving this mail because: -------
Aug 19 2010
next sibling parent d-bugmail puremagic.com writes:
http://d.puremagic.com/issues/show_bug.cgi?id=4679


Jonathan M Davis <jmdavisProg gmail.com> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
                 CC|                            |jmdavisProg gmail.com


--- Comment #1 from Jonathan M Davis <jmdavisProg gmail.com> 2010-08-19
15:39:49 PDT ---
The fact that private has anything to do with final is arguably a bug. It
certainly contradicts TDPL. The bug on that is
http://d.puremagic.com/issues/show_bug.cgi?id=4542

Now, this is still a bug. Either dmd still makes private final, at which point
overriding the method should be a bug, or it follows TDPL and does not make it
final, at which point, the derived method should be called, which it isn't. So,
this is a definitely a bug, but I'd favor fixing #4542 and make it call the
derived method rather than making overriding the method an error.

-- 
Configure issuemail: http://d.puremagic.com/issues/userprefs.cgi?tab=email
------- You are receiving this mail because: -------
Aug 19 2010
prev sibling parent d-bugmail puremagic.com writes:
http://d.puremagic.com/issues/show_bug.cgi?id=4679


Andrej Mitrovic <andrej.mitrovich gmail.com> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|NEW                         |RESOLVED
                 CC|                            |andrej.mitrovich gmail.com
         Resolution|                            |FIXED


--- Comment #2 from Andrej Mitrovic <andrej.mitrovich gmail.com> 2012-10-21
21:28:55 PDT ---
Private methods are now final by default and OP sample errors. Whether or not
that will change (probably not) depends on Issue 4542.

-- 
Configure issuemail: http://d.puremagic.com/issues/userprefs.cgi?tab=email
------- You are receiving this mail because: -------
Oct 21 2012