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gcc/ada/ * exp_ch5.adb (Expand_General_Case_Statement.Pattern_Match): Add new function Indexed_Element to handle array element comparisons. Handle case choices that are array aggregates, string literals, or names denoting constants. * sem_case.adb (Composite_Case_Ops.Array_Case_Ops): New package providing utilities needed for casing on arrays. (Composite_Case_Ops.Choice_Analysis): If necessary, include array length as a "component" (like a discriminant) when traversing components. We do not (yet) partition choice analysis to deal with unequal length choices separately. Instead, we embed everything in the minimum-dimensionality Cartesian product space needed to handle all choices properly; this is determined by the length of the longest choice pattern. (Composite_Case_Ops.Choice_Analysis.Traverse_Discrete_Parts): Include length as a "component" in the traversal if necessary. (Composite_Case_Ops.Choice_Analysis.Parse_Choice.Traverse_Choice): Add support for case choices that are string literals or names denoting constants. (Composite_Case_Ops.Choice_Analysis): Include length as a "component" in the analysis if necessary. (Check_Choices.Check_Case_Pattern_Choices.Ops.Value_Sets.Value_Index_Count): Improve error message when capacity exceeded. * doc/gnat_rm/implementation_defined_pragmas.rst: Update documentation to reflect current implementation status. * gnat_rm.texi: Regenerate.
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