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date Fri, 27 Oct 2017 22:46:09 +0900
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------------------------------------------------------------------------------
--                                                                          --
--                         GNAT RUN-TIME COMPONENTS                         --
--                                                                          --
--                           S Y S T E M . D I M                            --
--                                                                          --
--                                 S p e c                                  --
--                                                                          --
--          Copyright (C) 2012-2017, Free Software Foundation, Inc.         --
--                                                                          --
-- GNAT is free software;  you can  redistribute it  and/or modify it under --
-- terms of the  GNU General Public License as published  by the Free Soft- --
-- ware  Foundation;  either version 3,  or (at your option) any later ver- --
-- sion.  GNAT is distributed in the hope that it will be useful, but WITH- --
-- OUT ANY WARRANTY;  without even the  implied warranty of MERCHANTABILITY --
-- or FITNESS FOR A PARTICULAR PURPOSE.                                     --
--                                                                          --
-- As a special exception under Section 7 of GPL version 3, you are granted --
-- additional permissions described in the GCC Runtime Library Exception,   --
-- version 3.1, as published by the Free Software Foundation.               --
--                                                                          --
-- You should have received a copy of the GNU General Public License and    --
-- a copy of the GCC Runtime Library Exception along with this program;     --
-- see the files COPYING3 and COPYING.RUNTIME respectively.  If not, see    --
-- <http://www.gnu.org/licenses/>.                                          --
--                                                                          --
-- GNAT was originally developed  by the GNAT team at  New York University. --
-- Extensive contributions were provided by Ada Core Technologies Inc.      --
--                                                                          --
------------------------------------------------------------------------------

--  Defines the dimension terminology

---------------------------
-- Dimension Terminology --
---------------------------

--  * Dimensioned type

--    A dimensioned type is a type (more accurately a first subtype) to which
--    the aspect Dimension_System applies to.

--      type Mks_Type is new Long_Long_Float
--        with
--         Dimension_System => (
--          (Unit_Name => Meter,    Unit_Symbol => 'm',   Dim_Symbol => 'L'),
--          (Unit_Name => Kilogram, Unit_Symbol => "kg",  Dim_Symbol => 'M'),
--          (Unit_Name => Second,   Unit_Symbol => 's',   Dim_Symbol => 'T'),
--          (Unit_Name => Ampere,   Unit_Symbol => 'A',   Dim_Symbol => 'I'),
--          (Unit_Name => Kelvin,   Unit_Symbol => 'K',   Dim_Symbol => "Θ"),
--          (Unit_Name => Mole,     Unit_Symbol => "mol", Dim_Symbol => 'N'),
--          (Unit_Name => Candela,  Unit_Symbol => "cd",  Dim_Symbol => 'J'));

--  * Dimensioned subtype

--    A dimensioned subtype is a subtype directly defined from the dimensioned
--    type and to which the aspect Dimension applies to.

--      subtype Length is Mks_Type
--        with
--         Dimension => (Symbol => 'm',
--           Meter =>  1,
--           others => 0);

package System.Dim is
   pragma Pure;

end System.Dim;