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A.4.6 String-Handling Sets and Mappings

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

The library package Strings.Maps.Constants has the following declaration:

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

          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;

          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

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

Each of these constants represents a correspondingly named set of characters or character mapping in Characters.Handling (see A.3.2).

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