Pragma Ada_05 (GNAT Reference Manual)

### 2.5 Pragma Ada_05 ¶

Syntax:

    pragma Ada_05;
    pragma Ada_05 (local_NAME);

A configuration pragma that establishes Ada 2005 mode for the unit to which it applies, regardless of the mode set by the command line switches. This pragma is useful when writing a reusable component that itself uses Ada 2005 features, but which is intended to be usable from either Ada 83 or Ada 95 programs.

Like all configuration pragmas, if the pragma is placed before a library level package specification it is not propagated to the corresponding package body (see RM 10.1.5(8)); it must be added explicitly to the package body.

The one argument form (which is not a configuration pragma) is used for managing the transition from Ada 95 to Ada 2005 in the run-time library. If an entity is marked as Ada_2005 only, then referencing the entity in Ada_83 or Ada_95 mode will generate a warning. In addition, in Ada_83 or Ada_95 mode, a preference rule is established which does not choose such an entity unless it is unambiguously specified. This avoids extra subprograms marked this way from generating ambiguities in otherwise legal pre-Ada_2005 programs. The one argument form is intended for exclusive use in the GNAT run-time library.