Re: Copying a container on function call... (Was Re: return_stl_iterator acting as const?)

John Smith wrote:
> Well another 2 days on this and still no closer to figuring it out...  I
> tried to wrap a custom iterator around the class:
> 
[...]
> I'm really amazed that it is so difficult, and no one seems to know how to
> pass a vector of objects to LUA and have LUA modify member variables of
> those objects.  It would seem to be the type of problem that luabind was be
> designed to solve.  However every example I can find on the web, the only
> use of a container of objects is to read the values not modify them.  So I'm
> completely at a loss here...

Unfortunately it can't be done with "return_stl_iterator". That policy
is awful and really needs to be redone properly, but in the meantime the
simplest solution would be to create a new policy using the code in
iterator_policy.hpp, and change the line that says:

    convert_to_lua(L, *self->first);

to

    convert_to_lua(L, &*self->first);

or

    convert_to_lua(L, boost::ref(*self->first));

That should do it.

-- 
Daniel Wallin
BoostPro Computing
http://www.boostpro.com

------------------------------------------------------------------------------
Open Source Business Conference (OSBC), March 24-25, 2009, San Francisco, CA
-OSBC tackles the biggest issue in open source: Open Sourcing the Enterprise
-Strategies to boost innovation and cut costs with open source participation
-Receive a $600 discount off the registration fee with the source code: SFAD
http://p.sf.net/sfu/XcvMzF8H