Ada 2012 Reference Manual
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 Pure(Constants);
pragma Pure(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;
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
--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;
... -- 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).
NOTES
15 There are certain characters which are defined to be lower case letters by ISO 10646 and are therefore allowed in identifiers, but are not considered lower case letters by Ada.Strings.Maps.Constants.
