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3.11 Declarative Parts
1
A declarative_part
contains declarative_items (possibly
none).
Syntax
2
declarative_part
::= {
declarative_item}
3
declarative_item
::=
basic_declarative_item |
body
4/1
basic_declarative_item
::=
basic_declaration |
aspect_clause |
use_clause
5
body
::= proper_body |
body_stub
6
proper_body
::=
subprogram_body |
package_body |
task_body |
protected_body
Dynamic Semantics
7
The elaboration of a
declarative_part
consists of the elaboration of the
declarative_items,
if any, in the order in which they are given in the
declarative_part.
8
An elaborable construct is
in the
elaborated state after the normal completion of its elaboration.
Prior to that, it is
not yet elaborated.
9
For a
construct that attempts to use a body, a check (Elaboration_Check) is
performed, as follows:
10/1
- For a call to a (non-protected) subprogram
that has an explicit body, a check is made that the body is already elaborated.
This check and the evaluations of any actual parameters of the call are
done in an arbitrary order.
11
- For a call to a protected operation
of a protected type (that has a body -- no check is performed if a pragma
Import applies to the protected type), a check is made that the protected_body
is already elaborated. This check and the evaluations of any actual parameters
of the call are done in an arbitrary order.
12
- For the activation of a task, a check
is made by the activator that the task_body
is already elaborated. If two or more tasks are being activated together
(see 9.2), as the result of the elaboration
of a declarative_part or the initialization
for the object created by an allocator, this check is done for all of
them before activating any of them.
13
- For the instantiation of a generic
unit that has a body, a check is made that this body is already elaborated.
This check and the evaluation of any explicit_generic_actual_parameters
of the instantiation are done in an arbitrary order.
14
The exception Program_Error
is raised if any of these checks fails.
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