/usr/share/ada/adainclude/opentoken/opentoken-production.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) 2003, 2013, 2014 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.
--
-------------------------------------------------------------------------------
with OpenToken.Token.Enumerated.List;
with OpenToken.Token.Enumerated.Nonterminal;
pragma Elaborate_All (OpenToken.Token.Enumerated);
-------------------------------------------------------------------------------
-- This package provides a type and operations for building grammar
-- productions.
-------------------------------------------------------------------------------
generic
with package Token is new OpenToken.Token.Enumerated (<>);
with package Token_List is new Token.List;
with package Nonterminal is new Token.Nonterminal (Token_List);
package OpenToken.Production is
----------------------------------------------------------------------------
-- The Right Hand Side of a production is a token list "+"ed with a
-- synthesization routine. For example:
-- Number & Minus_Sign & Number + Nonterminal.Synthesize_First
--
type Right_Hand_Side is private;
-- Create the right hand side of a production from a list of
-- tokens and a synthesization routine. The synthesization routine
-- will be called whenever the production is reduced by the
-- parser.
function "+"
(Tokens : in Token_List.Instance;
Action : in Nonterminal.Synthesize)
return Right_Hand_Side;
function "+"
(Tokens : in Token.Class;
Action : in Nonterminal.Synthesize)
return Right_Hand_Side;
function "+"
(Action : in Nonterminal.Synthesize)
return Right_Hand_Side;
function "+"
(Tokens : in Token_List.Instance;
Index : in Integer)
return Right_Hand_Side;
function "+"
(Tokens : in Token.Class;
Index : in Integer)
return Right_Hand_Side;
-- Add an index used to help identify the production.
function "+"
(Index : in Integer)
return Right_Hand_Side;
-- A right hand side with no tokens
----------------------------------------------------------------------------
-- A production instance consists of a nonterminal token instance "<=" ed to
-- a Right Hand Side . For example:
-- Subtraction <= Number & Minus_Sign & Number +
-- Nonterminal.Synthesize_Self
--
-- If a token list with no synthesization routine is used, the target
-- non-terminal's default synthesization routine will be used. For example:
-- Subtraction <= Number & Minus_Sign & Number
-- will use Subtraction's default synthesization routine.
--
type Instance is private;
type Handle is access all Instance;
----------------------------------------------------------------------------
-- Production building operators using Right Hand Sides
----------------------------------------------------------------------------
function "<=" (LHS : in Nonterminal.Handle;
RHS : in Right_Hand_Side
) return Instance;
function "<=" (LHS : in Nonterminal.Class;
RHS : in Right_Hand_Side
) return Instance;
----------------------------------------------------------------------------
-- Production building operators using token lists
----------------------------------------------------------------------------
function "<=" (LHS : in Nonterminal.Handle;
RHS : in Token_List.Instance
) return Instance;
function "<=" (LHS : in Nonterminal.Class;
RHS : in Token_List.Instance
) return Instance;
----------------------------------------------------------------------------
-- Production building operators using tokens
----------------------------------------------------------------------------
function "<=" (LHS : in Nonterminal.Handle;
RHS : in Token.Class
) return Instance;
function "<=" (LHS : in Nonterminal.Class;
RHS : in Token.Class
) return Instance;
----------
-- Access functions
function First_Token (Item : in Instance) return Token_List.List_Iterator;
function LHS (Item : in Instance) return Nonterminal.Handle;
function LHS_ID (Item : in Instance) return Token.Token_ID;
function Index (Item : in Instance) return Integer;
function Action (Item : in Instance) return Nonterminal.Synthesize;
private
type Right_Hand_Side is record
Tokens : Token_List.Instance;
Action : Nonterminal.Synthesize;
Index : Integer; -- In grammar rule
end record;
type Instance is record
LHS : Nonterminal.Handle;
RHS : Right_Hand_Side;
end record;
end OpenToken.Production;
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