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4.44 Attribute Old

In addition to the usage of Old defined in the Ada 2012 RM (usage within Post aspect), GNAT also permits the use of this attribute in implementation defined pragmas Postcondition, Contract_Cases and Test_Case. Also usages of Old which would be illegal according to the Ada 2012 RM definition are allowed under control of implementation defined pragma Unevaluated_Use_Of_Old.