[luabind] Adding an overload for the assignment operator in lua for luabind classes

[Abhijit N. <abh...@gm...>]

Hi,

Lua does not allow the assignment operator to be overloaded and has no meta
function for it. I have got around this by using the proxy pattern and the
__index/__newindex meta methods.

Now I have begun using classes defined via luabind's object oriented system
thats exposed to Lua.

I am wondering if the C++ code for Luabind can be changed to allow the
assignment operator to be overloaded without changing the code for the Lua
interpretor itself.

Perhaps such a overload would call into a new meta-method name thats not
used by Lua such as '__assign()'

This would not conflict with any meta method that Lua already uses and
would apply only to instances of luabind classes.

I am guessing that the luabind::adl::object class needs to be changed, or
perhaps index_proxy. But I am not sufficiently familiar with how luabind
forwards calls to existing Lua meta-methods, to its objects.

Has anyone explored the C++ code in luabind that supports operator
overloading in Lua?

Edit: I see some attempts to add a new operator here:
https://github.com/decimad/luabind-deboostified/commit/55b1bd9217205253b41ab7d4746637ee5b0d276f

If I try the above with the assignment operator though, I do no see it
getting called in Lua. Are there any other changes needed in C++ for this?

http://stackoverflow.com/questions/33141507/adding-an-overload-for-the-assignment-operator-in-lua-for-luabind-classes

Thanks,

Abhi