A new WG21 paper is available. If you are not a committee member, please use the comments section below or the std-proposals forum for public discussion.

Document number: N4166

Date: 2014-10-06

Movable initializer lists

by David Krauss

Excerpt:

Often std::initializer_list cannot be used, or it requires a const_cast hack, as it provides read-only access to its sequence. This is a consequence of the sequence potentially being shared with other initializer_list objects, although often it is statically known to be uniquely local. A new initializer list class template is proposed to allow function parameters which may leverage (by overloading) or require strict ownership. Addition of this class does not impinge on the cases where the sequence should be shared. No breaking changes are proposed.