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
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body::= proper_body | body_stub
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proper_body::=
subprogram_body | package_body | task_body | protected_body
Static Semantics
6.1/2
The list of declarative_items of a declarative_part is called the declaration list of the declarative_part.
Dynamic Semantics
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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.
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- 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.
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- 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.
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The exception Program_Error is raised if any of these checks fails.