[boost] [assign] syntax for creating an initially empty list --- request for feedback

From: Thorsten Ottosen (thorsten.ottosen_at_[hidden])
Date: 2008-08-14 17:05:32

Dear all,

A user of boost.assign was doing the following:

   array<bool, N> temp = list_of<bool>().repeat(N, true);

The problem in this context is that that list_of<T>() inserts a default 
constructed element, and that there is no way to avoid that.

I proposed that we use the following syntax:

    boost::assign::list_of(boost::none)

to say that the initial list is empty.

Comments?

-Thorsten