A configuration pragma that establishes Ada 2005 mode for the unit to which
it applies, regardless of the mode set by the command line switches.
This mode is set automatically for the
packages and their children, so you need not specify it in these
contexts. This pragma is useful when writing a reusable component that
itself uses Ada 2005 features, but which is intended to be usable from
either Ada 83 or Ada 95 programs.