[odb-users] Pimpl + Relations

[Boris Kolpackov]

Hi Uwe,

cetoni GmbH - Uwe Kindler <uwe.kindler at cetoni.de> writes:

> typedef boost::shared_ptr<CLens> LensPtr;
> #pragma db member(Lens1) virtual(LensPtr) get(lens) set(setLens)

This should work in theory. In practice what happens is the ODB
compiler checks for a default constructor in LensPtr (which is
needed because a by-value modifier is used). It doesn't find it
even though boost::shared_ptr is default-constructible because 
shared_ptr<CLens> is not fully instantiated.

I've fixed this by making sure that virtual data member types are
fully instantiated before checking for the default ctor. Can you
try a new revision of the 2.1.1 bugfix and see if it works for
you:

http://www.codesynthesis.com/~boris/tmp/odb/odb-2.1.1-i686-windows.zip

Also, you can simplify the above pragma if you use 'lens' as the
virtual member name. This way the ODB compiler should find the 
accessor and modifier functions automatically:

#pragma db member(lens) virtual(LensPtr)

Boris