7e06a62f5b
gcc/ada/ * exp_ch4.adb (Expand_N_Type_Conversion): Handle the case of applying an invariant check for a conversion to a class-wide type whose root type has a type invariant, when the conversion appears within the immediate scope of the type and the expression is of a specific tagged type. * sem_ch3.adb (Is_Private_Primitive): New function to determine whether a primitive subprogram is a private operation. (Check_Abstract_Overriding): Enforce the restriction imposed by AI12-0042 of requiring overriding of an inherited nonabstract private operation when the ancestor has a class-wide type invariant and the ancestor's private operation is visible. (Derive_Subprogram): Set Requires_Overriding on a subprogram inherited from a visible private operation of an ancestor to which a Type_Invariant'Class expression applies.
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