/usr/share/ada/adainclude/opentoken/opentoken-recognizer-extended_digits.ads is in libopentoken5-dev 6.0b-4.
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--
-- Copyright (C) 1999 Christoph Karl Walter Grein
--
-- This file is part of the OpenToken package.
--
-- The OpenToken package is free software; you can redistribute it and/or
-- modify it under the terms of the GNU General Public License as published
-- by the Free Software Foundation; either version 3, or (at your option)
-- any later version. The OpenToken package is distributed in the hope that
-- it will be useful, but WITHOUT ANY WARRANTY; without even the implied
-- warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
-- GNU General Public License for more details. You should have received
-- a copy of the GNU General Public License distributed with the OpenToken
-- package; see file GPL.txt. If not, write to the Free Software Foundation,
-- 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
--
-- As a special exception, if other files instantiate generics from
-- this unit, or you link this unit with other files to produce an
-- executable, this unit does not by itself cause the resulting
-- executable to be covered by the GNU General Public License. This
-- exception does not however invalidate any other reasons why the
-- executable file might be covered by the GNU Public License.
--
-------------------------------------------------------------------------------
with Ada.Text_IO;
-----------------------------------------------------------------------------
-- This package implements a token recognizer for a sequence of
-- extended digits. An extended digit is either a decimal digit or a
-- character in the range 'a'..'f' in any letter case. The extended
-- digit must be smaller than the base. The sequence of digits may be
-- interspersed with one or more single underscores (but must not end
-- with an underscore). [For the OpenToken end user, this should not
-- be too useful, but it shows up handy for internal use.]
-----------------------------------------------------------------------------
package OpenToken.Recognizer.Extended_Digits is
type Instance is new OpenToken.Recognizer.Instance with private;
-- The maximum base value supported by this package
Maximum_Base : constant := 16;
--------------------------------------------------------------------------
-- This procedure will be called to create an Extended Digits
-- token for the given base.
--
-- It defaults to not reportable because it is mainly used as a
-- building block for other recognizers.
--------------------------------------------------------------------------
function Get
(For_Base : Ada.Text_IO.Number_Base := 16;
Allow_Underscores : Boolean := True;
Reportable : Boolean := False)
return Instance;
private
type State_ID is (First_Char, Extended_Digit, Underscore, Done);
type Instance is new OpenToken.Recognizer.Instance with record
Number_Base : Ada.Text_IO.Number_Base;
Allow_Underscores : Boolean;
-- The finite state machine state
State : State_ID := First_Char;
end record;
overriding procedure Clear (The_Token : in out Instance);
overriding procedure Analyze
(The_Token : in out Instance;
Next_Char : in Character;
Verdict : out Analysis_Verdict);
end OpenToken.Recognizer.Extended_Digits;
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