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This extends the processing done for the derivation of private discriminated types to concurrent types, which is now required because this derivation is no longer redone when a subtype of the derived concurrent type is built. This increases the number of entities generated internally in the compiler but this case is sufficiently rare as not to be a real concern. 2019-08-13 Eric Botcazou <ebotcazou@adacore.com> gcc/ada/ * sem_ch3.adb (Build_Derived_Concurrent_Type): Add a couple of local variables and use them. When the derived type fully constrains the parent type, rewrite it as a subtype of an implicit (unconstrained) derived type instead of the other way around. (Copy_And_Build): Deal with concurrent types and use predicates. (Build_Derived_Private_Type): Build the full derivation if needed for concurrent types too. (Build_Derived_Record_Type): Add marker comment. (Complete_Private_Subtype): Use predicates. gcc/testsuite/ * gnat.dg/discr56.adb, gnat.dg/discr56.ads, gnat.dg/discr56_pkg1.adb, gnat.dg/discr56_pkg1.ads, gnat.dg/discr56_pkg2.ads: New testcase. From-SVN: r274359
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