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-------------------------------------------------------------------------------
--
-- 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 2, 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.
--
-- Maintainer: Ted Dennison (dennison@telepath.com)
--
-- Update History:
-- $Log: asu_example_3_6.ads,v $
-- Revision 1.1 2000/08/12 15:48:18 Ted
-- Spec for examile 3.6 from ASU text
--
--
-------------------------------------------------------------------------------
with Opentoken.Token.Enumerated;
with Opentoken.Token.Enumerated.Analyzer;
with Opentoken.Recognizer.Keyword;
with Opentoken.Recognizer.Identifier;
with Opentoken.Recognizer.Integer;
with Opentoken.Recognizer.Real;
with Opentoken.Recognizer.Character_Set;
with Relop_Example_Token;
---------------------------------------------------------------------------
-- This example is an implementation of Example 3.6 from "Compilers
-- Principles, Techniques, and Tools" by Aho, Sethi, and Ullman (aka: "The
-- Dragon Book").
---------------------------------------------------------------------------
package Asu_Example_3_6 is
type Example_Token_ID is (If_ID, Then_ID, Else_ID, ID_ID, Int, Real, Relop, Whitespace);
package Example_Token is new Opentoken.Token.Enumerated (Example_Token_ID);
package Tokenizer is new Example_Token.Analyzer;
Syntax : constant Tokenizer.Syntax :=
(If_ID => Tokenizer.Get(Opentoken.Recognizer.Keyword.Get ("if")),
Then_ID => Tokenizer.Get(Opentoken.Recognizer.Keyword.Get ("then")),
Else_ID => Tokenizer.Get(Opentoken.Recognizer.Keyword.Get ("else")),
ID_ID => Tokenizer.Get(Opentoken.Recognizer.Identifier.Get),
Int => Tokenizer.Get(Opentoken.Recognizer.Integer.Get),
Real => Tokenizer.Get(Opentoken.Recognizer.Real.Get),
Relop => Tokenizer.Get(Relop_Example_Token.Get),
Whitespace => Tokenizer.Get(Opentoken.Recognizer.Character_Set.Get
(Opentoken.Recognizer.Character_Set.Standard_Whitespace))
);
end Asu_Example_3_6;
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