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Pragma Unimplemented_Unit


     pragma Unimplemented_Unit;

If this pragma occurs in a unit that is processed by the compiler, GNAT aborts with the message `xxx not implemented', where xxx is the name of the current compilation unit. This pragma is intended to allow the compiler to handle unimplemented library units in a clean manner.

The abort only happens if code is being generated. Thus you can use specs of unimplemented packages in syntax or semantic checking mode.