Re: [boost] Multiple inheritance & constructors problem. Boost.python

From: Ivan A. Vigasin (vig_at_[hidden])
Date: 2001-11-14 10:02:13

On Wed, 14 Nov 2001, David Abrahams wrote:

> Perhaps. What versions are you using?
Python 2.1 on Solaris8, boost-1.24

> OK, I believe that Python2.2 is just being liberal, here. If you look at the
> code below, Boost.Python only does that method unwinding when looking at
> /base/ class attributes. So, this should work for you:
>
> class Base:
>     def __init__(self):
>         self.x = 'x'
> class BasePrime(Base):
>     __init_Base_ = Base.__init__
> class Derived(A1,BasePrime):
>     def __init__(self):
>         A1.__init__(self)
>         self.__init_Base_()
>         self.y = 'y'
It works. But only if Base is root of inheritance tree. Otherwise we get same error for all Base's ancestors.

;(((

> class BasePrime(Base): pass
> class Derived(A1,BasePrime):
>     def __init__(self):
>         A1.__init__(self)
>         BasePrime.__init__(self)
It doesn't work at all ;(

Regards, Ivan <vig_at_[hidden]>
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