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10.1.5 Pragmas and Program Units

   This subclause discusses pragmas related to program units, library units, and compilations.

Name Resolution Rules

   Certain pragmas are defined to be program unit pragmas. A name given as the argument of a program unit pragma shall resolve to denote the declarations or renamings of one or more program units that occur immediately within the declarative region or compilation in which the pragma immediately occurs, or it shall resolve to denote the declaration of the immediately enclosing program unit (if any); the pragma applies to the denoted program unit(s). If there are no names given as arguments, the pragma applies to the immediately enclosing program unit.

Legality Rules

   A program unit pragma shall appear in one of these places:
   Certain program unit pragmas are defined to be library unit pragmas. The name, if any, in a library unit pragma shall denote the declaration of a library unit.

Static Semantics

       A library unit pragma that applies to a generic unit does not apply to its instances, unless a specific rule for the pragma specifies the contrary.

Post-Compilation Rules

   Certain pragmas are defined to be configuration pragmas; they shall appear before the first compilation_unit of a compilation. They are generally used to select a partition-wide or system-wide option. The pragma applies to all compilation_units appearing in the compilation, unless there are none, in which case it applies to all future compilation_units compiled into the same environment.

Implementation Permissions

   An implementation may place restrictions on configuration pragmas, so long as it allows them when the environment contains no library_items other than those of the predefined environment.

Implementation Advice

       When applied to a generic unit, a program unit pragma that is not a library unit pragma should apply to each instance of the generic unit for which there is not an overriding pragma applied directly to the instance.

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