/usr/share/ada/adainclude/opentoken/opentoken-recognizer-csv_field.ads is in libopentoken5-dev 6.0b-4.
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The actual contents of the file can be viewed below.
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--
-- Copyright (C) 2009 Stephe Leake
-- Copyright (C) 1999 FlightSafety International and Ted Dennison
--
-- 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.
--
-- This software was originally developed by the following company,
-- and was released as open-source software as a service to the
-- community:
--
-- FlightSafety International Simulation Systems Division
-- Broken Arrow, OK USA 918-259-4000
-------------------------------------------------------------------------------
-------------------------------------------------------------------------------
-- This package implements a token recognizer for comma-separated-value (CSV)
-- fields of any type. Due to its general nature, it should be declared later
-- in the syntax than more specific CSV field recognizers, so that it will work
-- as a default match. To facilitate that, it does not match any leading or
-- trailing whitespace.
-------------------------------------------------------------------------------
package OpenToken.Recognizer.CSV_Field is
type Instance is new OpenToken.Recognizer.Instance with private;
----------------------------------------------------------------------------
-- This procedure will be called to perform further analysis on a token
-- based on the given next character. It is declared here to override the
-- inherited version.
----------------------------------------------------------------------------
overriding procedure Analyze
(The_Token : in out Instance;
Next_Char : in Character;
Verdict : out Analysis_Verdict);
----------------------------------------------------------------------------
-- This procedure will be called when analysis on a new candidate string
-- is started. The Token needs to clear its state (if any).
----------------------------------------------------------------------------
overriding procedure Clear (The_Token : in out Instance);
----------------------------------------------------------------------------
-- This procedure will be called to create an Identifier token.
----------------------------------------------------------------------------
function Get return Instance;
private
type State_ID is (First_Char, Text, Done);
type Instance is new OpenToken.Recognizer.Instance with record
-- The finite state machine state
State : State_ID := First_Char;
end record;
end OpenToken.Recognizer.CSV_Field;
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