/usr/share/doc/libopentoken4-dev/examples/ASU_Example_4_46/asu_example_4_46_rd-run.adb is in libopentoken4-dev 5.0a-1.
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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) 2000 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 example is an implementation of Example 4.46 from "Compilers
-- Principles, Techniques, and Tools" by Aho, Sethi, and Ullman (aka: "The
-- Dragon Book"). The example was meant to demonstrate basic LALR(1) parsing.
-- Here we show to to perform LL(n) parsing with it.
-------------------------------------------------------------------------------
with Ada.Exceptions;
with Ada.Text_IO; use Ada.Text_IO;
procedure ASU_Example_4_46_RD.Run is
Test_File_Name : constant String := "Example.txt";
begin
R.all := L.all;
Put ("Parsing file " & Test_File_Name & "...");
Flush;
Open
(File => Input_File,
Name => Test_File_Name,
Mode => In_File);
-- Load up the first token
Tokenizer.Find_Next (Analyzer);
OpenToken.Token.Parse
(Match => S_Prime,
Analyzer => Analyzer);
Put_Line ("passed");
exception
when Error : OpenToken.Parse_Error =>
Put_Line ("failed at line" & Integer'Image (Tokenizer.Line (Analyzer)) &
", column" & Integer'Image (Tokenizer.Column (Analyzer)) &
" due to parse exception:");
Put_Line (Ada.Exceptions.Exception_Information (Error));
end ASU_Example_4_46_RD.Run;
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