On 6/9/2010 8:54 AM, joel falcou wrote:
Eric Niebler wrote:
I'll add one. Can you say why you want it?
I think I may have missed soem details but basically I need my expression to overload assignment to generate a expr<assign,..> or is inheritng from basic_expr AND use BOOST_PROTO_EXTENDS_ASSIGN enough to get it back ?
You typically don't inherit from Proto's expression types; you use proto::extends or BOOST_PROTO_(BASIC_)EXTENDS. And if you do that, then the Proto expression you're extending is just a tuple data member that holds the child nodes. It doesn't need any fancy member functions. If you're using proto::extends or BOOST_PROTO_EXTENDS (or BOOST_PROTO_BASIC_EXTENDS with BOOST_PROTO_EXTENDS_ASSIGN), then you'll have the right overloaded assignment operator regardless of whether you're extending expr or basic_expr. -- Eric Niebler BoostPro Computing http://www.boostpro.com