Reason: The preferred syntax for specifying
the address of an entity is an attribute_definition_clause
specifying the Address attribute. Therefore, the special-purpose at_clause
syntax is now obsolete.
2.b
The above equivalence implies, for example,
that only one at_clause
is allowed for a given entity. Similarly, it is illegal to give both
an at_clause
and an attribute_definition_clause
specifying the Address attribute.
Extensions to Ada 83
2.c
We now allow to define the
address of an entity using an attribute_definition_clause.
This is because Ada 83's at_clause
is so hard to remember: programmers often tend to write “for X'Address
use...;”.
Wording Changes from Ada 83
2.d
Ada 83's address_clause
is now called an at_clause
to avoid confusion with the new term “Address clause” (that
is, an attribute_definition_clause
for the Address attribute).
Ada 2005 and 2012 Editions sponsored in part by Ada-Europe
Ada 2005 and 2012 Editions sponsored in part by Ada-Europe