id	summary	reporter	owner	description	type	status	milestone	component	version	severity	resolution	keywords	cc
3472	Setting value_initialized<T> to a value when T is a top-level const	Edward Diener <eld@…>	Fernando Cacciola	"There is no way to set value_initialized<T> object to the non-initialized value when T is a top-level const. I think there should be.

While it is not allowed to set a const value to a value after construction, one can usually set it to a value at construction time. The value_initialized<T> has no way to do that. Adding a constructor to it, which would allow the value to be set to something other than its default value initialized state, would solve this  problem for T when it is a top-level const.

A practical use case is that value_initialized<T> might be used in a template class where T is a template parameter of that particular template class. If the end-user specifies that T is a top-level const, then an initial value for T passed to that template class's constructor can not be used to set a value_initialized<T> object to that value, making value_initialized<T> unusable in such a situation. 

Adding a constructor to value_initialized<T> would solve that problem."	Feature Requests	closed	Boost 1.41.0	utility	Boost 1.40.0	Problem	fixed	value_initialized const	niels_address_until_2010-10-10@…