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The package Strings provides declarations common to the string handling packages.
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The library package Strings has the following declaration:
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package Ada.Strings is
pragma Pure(Strings);
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{00285AI95−00285−01} Space : constant Character := ' ';
Wide_Space : constant Wide_Character := ' ';
Wide_Wide_Space : constant Wide_Wide_Character := ' ';
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Length_Error, Pattern_Error, Index_Error, Translation_Error : exception;
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type Alignment is (Left, Right, Center);
type Truncation is (Left, Right, Error);
type Membership is (Inside, Outside);
type Direction is (Forward, Backward);
type Trim_End is (Left, Right, Both);
end Ada.Strings;
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{00285AI95−00285−01} {incompatibilities with Ada 95} Constant Wide_Wide_Space is newly added to Ada.Strings. If Ada.Strings is referenced in a use_clause, and an entity E with a defining_identifier of Wide_Wide_Space is defined in a package that is also referenced in a use_clause, the entity E may no longer be use−visible, resulting in errors. This should be rare and is easily fixed if it does occur.