id	summary	reporter	owner	description	type	status	milestone	component	version	severity	resolution	keywords	cc
5167	Allow proto::extends default ctor to leave the proto_expr_ member uninitialized	antoine.de-maricourt@…	Eric Niebler	"Proposal:

turn default ctor for proto::extends in proto/extends.hpp
from:
  
{{{
extends(): proto_expr_(){}
}}}

to: 
 
{{{
 extends() { }
}}}


Rational:
It is up to the derived class to decide if expr can be left in undefined state (and to control it), and not to the extends base class.
"	Bugs	closed	To Be Determined	proto	Boost 1.46.0	Optimization	wontfix	proto, extends, default constructor