Ada Programming/Libraries/Ada.Strings

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Ada. Time-tested, safe and secure.
Ada. Time-tested, safe and secure.

This language feature is available from Ada 95 on.

Ada.Strings is a unit of the Predefined Language Environment since Ada 95.

This package is the base package for all string packages. It defines common exceptions and constants.

These child packages are:

Specification[edit | edit source]

--                     Standard Ada library specification
--   Copyright (c) 2003-2018 Maxim Reznik <>
--   Copyright (c) 2004-2016 AXE Consultants
--   Copyright (c) 2004, 2005, 2006 Ada-Europe
--   Copyright (c) 2000 The MITRE Corporation, Inc.
--   Copyright (c) 1992, 1993, 1994, 1995 Intermetrics, Inc.
--   SPDX-License-Identifier: BSD-3-Clause and LicenseRef-AdaReferenceManual
-- -------------------------------------------------------------------------

package Ada.Strings is
   pragma Pure (Strings);

   Space           : constant Character      := ' ';
   Wide_Space      : constant Wide_Character := ' ';
   Wide_Wide_Space : constant Wide_Wide_Character := ' ';

   Length_Error, Pattern_Error, Index_Error, Translation_Error
     : exception;

   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;

See also[edit | edit source]

Wikibook[edit | edit source]

External examples[edit source]

Ada Reference Manual[edit | edit source]

Ada 95[edit | edit source]

Ada 2005[edit | edit source]

Ada 2012[edit | edit source]

Open-Source Implementations[edit | edit source]