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File src/natools-s_expressions-replayable.ads artifact 40dc4e87b6 part of check-in c3f4498cb8


------------------------------------------------------------------------------
-- Copyright (c) 2014, Natacha Porté                                        --
--                                                                          --
-- Permission to use, copy, modify, and distribute this software for any    --
-- purpose with or without fee is hereby granted, provided that the above   --
-- copyright notice and this permission notice appear in all copies.        --
--                                                                          --
-- THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES --
-- WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF         --
-- MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR  --
-- ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES   --
-- WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN    --
-- ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF  --
-- OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.           --
------------------------------------------------------------------------------

------------------------------------------------------------------------------
-- Natools.S_Expressions.Replayable provides an interface for S-expression  --
-- descriptors that can be duplicated, to replay the same segment several   --
-- times.                                                                   --
------------------------------------------------------------------------------

package Natools.S_Expressions.Replayable is
   pragma Pure;

   type Descriptor is limited interface and S_Expressions.Descriptor;

   function Duplicate (Object : Descriptor) return Descriptor is abstract;
      --  Return an idependant copy of Object with the same current state

end Natools.S_Expressions.Replayable;