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The actuals for parameters of formal packages are visible in the instance if the formal packages either are declared with a box or contain defaulted parameters. This is essentially implemented in Check_Generic_Actuals and Restore_Private_Views, with the help of the Is_Visible_Formal flag. This documents more prominently the processing and streamlines it, as well as removes a couple of questionable calls to Set_Is_Hidden, thus plugging a couple more loopholes in the implementation. gcc/ada/ChangeLog: PR ada/122161 * sem_ch12.adb: Improve the description of Check_Generic_Actuals, Restore_Private_Views and Switch_View, and alphabetize them. (Check_Generic_Actuals): Make actuals visible only if needed. (Install_Formal_Packages): Pass exact Is_Formal_Box parameter and remove call to Set_Is_Hidden. (Instantiate_Formal_Package): Use Next_Non_Pragma consistently in the loop computing the visibility of actuals. (Analyze_Package_Instantiation): Use named second parameter in the call to Restore_Private_Views. (Analyze_Subprogram_Instantiation): Likewise. (Instantiate_Package_Body): Likewise and for Check_Generic_Actuals. (Instantiate_Subprogram_Body): Likewise. (Restore_Env): Replace call to Restore_Private_Views. (Restore_Private_Views): Remove default value for second parameter and test of presence for first parameter. Consistently clear the Is_Potentially_Use_Visible flag when setting the Is_Hidden flag. Remove call to Set_Is_Hidden for a formal package of the enclosing generic unit, if any.
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