Pragma Type_Invariant - GNAT Reference Manual

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2.176 Pragma Type_Invariant

Syntax:

    pragma Type_Invariant
      ([Entity =>] type_LOCAL_NAME,
       [Check  =>] EXPRESSION);

The Type_Invariant pragma is intended to be an exact replacement for the language-defined Type_Invariant aspect, and shares its restrictions and semantics. It differs from the language defined Invariant pragma in that it does not permit a string parameter, and it is controlled by the assertion identifier Type_Invariant rather than Invariant.