On Sunday 08 June 2014 19:51:12 Vicente J. Botet Escriba wrote:

The dependency mpl -> utility

||

from ||||

|is there just for this line

// dwa 2002/9/10 -- make sure not to invoke undefined behavior // when we pass arg. value_initialized<arg> x;

Do we really need to use this value_initialized class to ensure initialization with current compilers?

Surprisingly, even some fairly recent compilers don't implement value initialization properly. See comments in value_init.hpp and relevant macros in Boost.Config.