Annex J
(normative)
Obsolescent Features
{
AI95-00368-01}
[
This Annex contains descriptions of features of
the language whose functionality is largely redundant with other features
defined by this Reference Manual. Use of these features is not recommended
in newly written programs. Use of these features can be prevented by
using pragma Restrictions (No_Obsolescent_Features), see
13.12.1.]
Ramification: These features are still
part of the language, and have to be implemented by conforming implementations.
The primary reason for putting these descriptions here is to get redundant
features out of the way of most readers. The designers of the next version
of Ada will have to assess whether or not it makes sense to drop these
features from the language.
Wording Changes from Ada 83
The following
features have been removed from the language, rather than declared to
be obsolescent:
The package Low_Level_IO (see
A.6).
The Epsilon, Mantissa, Emax, Small, Large,
Safe_Emax, Safe_Small, and Safe_Large attributes of floating point types
(see
A.5.3).
The pragmas System_Name, Storage_Unit, and
Memory_Size (see
13.7).
The pragma Shared (see
C.6).
Implementations can continue to support the
above features for upward compatibility.
Wording Changes from Ada 95
{
AI95-00368-01}
A mention of the No_Obsolescent_Features restriction was added.
Wording Changes from Ada 2005
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AI05-0229-1}
Pragma Controlled
has been removed from the language, rather than declared to be obsolescent.
No existing implementation gives it any effect. An implementation could
continue to support the pragma as an implementation-defined pragma for
upward compatibility.
Ada 2005 and 2012 Editions sponsored in part by Ada-Europe
