[Bug c++/19604] vtable error with virtual inheritance and arrays

[bangerth at dealii dot org]

--- Additional Comments From bangerth at dealii dot org  2005-01-26 04:25 
---
You are accessing something here  
  var[1].adresse() 
that definitely is not an A, but sitting somewhere between other 
objects. That's definitely not allowed. 
 
W. 

-- 
   What|Removed |Added

 Status|UNCONFIRMED |RESOLVED
 Resolution||INVALID


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=19604

[Bug c++/19604] vtable error with virtual inheritance and arrays

[pinskia at gcc dot gnu dot org]

--- Additional Comments From pinskia at gcc dot gnu dot org  2005-01-24 
14:37 ---
I think this is invalid and here is why?
Basically the sizeof (A) is smaller than sizeof(B).
But if you convert from B* to A* you cannot access the second element any more.

-- 
   What|Removed |Added

Summary|vtable error with virtual   |vtable error with virtual
   |inheritance and tables  |inheritance and arrays


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=19604

[Bug c++/19604] vtable error with virtual inheritance and arrays

[webmyster at addoc dot u-psud dot fr]

--- Additional Comments From webmyster at addoc dot u-psud dot fr  
2005-01-24 14:53 ---
(In reply to comment #2)
 I think this is invalid and here is why?
 Basically the sizeof (A) is smaller than sizeof(B).
 But if you convert from B* to A* you cannot access the second element any 
 more.

I'm agree it's not a conventional use of inheritance and tables. But it may be
valid.
Where could I find the C++ specifications used to implement g++, to get a valid
solution to my problem ?

Moreover, I would like to have a warning during the compilation. I think the
compiler can warning on each call of non first element of a table of classes
containing vtable.

-- 


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=19604