A.4.6 String-Handling Sets and Mappings

1. The language-defined package Strings.Maps.Constants declares Character_Set and Character_Mapping constants corresponding to classification and conversion functions in package Characters.Handling.
   Static Semantics
   
2. The library package Strings.Maps.Constants has the following declaration:

3. package Ada.Strings.Maps.Constants is
      pragma Preelaborate(Constants);
   

4.    Control_Set           : constant Character_Set;
      Graphic_Set           : constant Character_Set;
      Letter_Set            : constant Character_Set;
      Lower_Set             : constant Character_Set;
      Upper_Set             : constant Character_Set;
      Basic_Set             : constant Character_Set;
      Decimal_Digit_Set     : constant Character_Set;
      Hexadecimal_Digit_Set : constant Character_Set;
      Alphanumeric_Set      : constant Character_Set;
      Special_Set           : constant Character_Set;
      ISO_646_Set           : constant Character_Set;
   

5.    Lower_Case_Map        : constant Character_Mapping;
        --Maps to lower case for letters, else identity
      Upper_Case_Map        : constant Character_Mapping;
        --Maps to upper case for letters, else identity
      Basic_Map             : constant Character_Mapping;
        --Maps to basic letter for letters, else identity
   

6. private
      ... -- not specified by the language
   end Ada.Strings.Maps.Constants;
   

7. Each of these constants represents a correspondingly named set of characters or character mapping in Characters.Handling, See section A.3.2 The Package Characters.Handling.

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