/usr/share/ada/adainclude/opentoken/opentoken-production-list.ads is in libopentoken5-dev 6.0b-4.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
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--
-- Copyright (C) 2010 Stephe Leake
-- Copyright (C) 1999 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 package provides a type and operations for building lists of
-- productions for use in grammars.
-----------------------------------------------------------------------------
generic
package OpenToken.Production.List is
type Instance is tagged private;
----------------------------------------------------------------------------
-- Create a production list from a single instance.
----------------------------------------------------------------------------
function Only (Subject : in OpenToken.Production.Instance) return Instance;
----------------------------------------------------------------------------
-- Create a production list from a pair of production instances.
----------------------------------------------------------------------------
function "and" (Left : in OpenToken.Production.Instance;
Right : in OpenToken.Production.Instance) return Instance;
----------------------------------------------------------------------------
-- Create a production list from a production instance and a production list.
----------------------------------------------------------------------------
function "and" (Left : in OpenToken.Production.Instance;
Right : in Instance) return Instance;
function "and" (Left : in Instance;
Right : in OpenToken.Production.Instance) return Instance;
----------------------------------------------------------------------------
-- Create a token list from a pair of token lists.
----------------------------------------------------------------------------
function "and" (Left : in Instance;
Right : in Instance) return Instance;
----------------------------------------------------------------------------
-- This routine needs to be called when you are done using a list, or want
-- to reset it to empty.
----------------------------------------------------------------------------
procedure Clean (List : in out Instance);
type List_Iterator is private;
Iteration_Complete : exception;
----------------------------------------------------------------------------
-- Return an initialized iterator for traversing the token list
----------------------------------------------------------------------------
function Initial_Iterator (List : in Instance) return List_Iterator;
----------------------------------------------------------------------------
-- Move the iterator down the list to the next token.
----------------------------------------------------------------------------
procedure Next_Production (Iterator : in out List_Iterator);
----------------------------------------------------------------------------
-- Return the current Production in the list.
----------------------------------------------------------------------------
function Get_Production (Iterator : in List_Iterator) return OpenToken.Production.Instance;
----------------------------------------------------------------------------
-- Return true if the iterator is at the last production.
----------------------------------------------------------------------------
function Last_Production (Iterator : in List_Iterator) return Boolean;
----------------------------------------------------------------------------
-- Return true if the iterator past the last production.
----------------------------------------------------------------------------
function Past_Last (Iterator : in List_Iterator) return Boolean;
private
type List_Node;
type List_Node_Ptr is access List_Node;
type List_Node is record
Production : OpenToken.Production.Instance;
Next : List_Node_Ptr;
end record;
type Instance is tagged record
Head : List_Node_Ptr;
Tail : List_Node_Ptr;
end record;
type List_Iterator is new List_Node_Ptr;
end OpenToken.Production.List;
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