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gcc/ada/ * par-ch4.adb (P_Iterated_Component_Association): Extended to recognzize the similar Iterated_Element_Association. This node is only generated when an explicit Key_Expression is given. Otherwise the distinction between the two iterated forms is done during semantic analysis. * sinfo.ads: New node N_Iterated_Element_Association, for Ada202x container aggregates. New field Key_Expression. * sinfo.adb: Subprograms for new node and newn field. * sem_aggr.adb (Resolve_Iterated_Component_Association): Handle the case where the Iteration_Scheme is an Iterator_Specification. * exp_aggr.adb (Wxpand_Iterated_Component): Handle a component with an Iterated_Component_Association, generate proper loop using given Iterator_Specification. * exp_util.adb (Insert_Axtions): Handle new node as other aggregate components. * sem.adb, sprint.adb: Handle new node. * tbuild.adb (Make_Implicit_Loop_Statement): Handle properly a loop with an Iterator_ specification.
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