[PyQt] SIP and multiple inheritance ambiguity

[Scott Talbert]

On Fri, 3 Jun 2016, Scott Talbert wrote:

> Hi,
>
> I'm trying to wrap a set of classes that have a diamond multiple inheritance 
> hierarchy (A inherits from B and C; B and C inherit from D).
>
> When SIP generates the cast_A function, it won't compile under GCC 6.1.1 due 
> to an ambiguous base error:
> error: 'D' is an ambiguous base of 'A'
>         return static_cast<D *>(sipCpp);
>
> Any ideas on how to work around this, other than hand editing the cast_X 
> function?

Actually, I was wrong about this being related to a change in GCC.  It 
turns out this is related to a SIP change in 4.18:
https://www.riverbankcomputing.com/hg/sip/rev/14bfbaf7431a

I'm thinking SIP could possibly check the list of target types and if 
there are duplicates, it could omit those from the cast function?

Scott