-- This file is part of a Liberty Eiffel library.
-- See the full copyright at the end.
--
class REGULAR_EXPRESSION_ITEM_NOT_THEN_ANY
   --
   -- negate the node such that if node matches it makes
   -- a backtrack but conversely if node fails, the character
   -- is accepted (any character) and exploration continues.
   --

inherit
   REGULAR_EXPRESSION_ITEM
   REGULAR_EXPRESSION_ITEM_GLOBALS

create {ANY}
   make

feature {ANY}
   node: BACKTRACKING_NODE
         -- the node to negate

   make, set_node (value: BACKTRACKING_NODE)
      require
         value_not_void: value /= Void
      do
         node := value
      ensure
         definition: node = value
         node_not_void: node /= Void
      end

   explore (matcher: BACKTRACKING_REGULAR_EXPRESSION)
      do
         matcher.push_cut_point
         matcher.push_or(the_any_character_item)
         matcher.push_and(the_cut_and_false_node)
         matcher.set_current_node(node)
      end

end -- class REGULAR_EXPRESSION_ITEM_NOT_THEN_ANY
--
-- Copyright (C) 2009-2017: by all the people cited in the AUTHORS file.
--
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-- in the Software without restriction, including without limitation the rights
-- to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
-- copies of the Software, and to permit persons to whom the Software is
-- furnished to do so, subject to the following conditions:
--
-- The above copyright notice and this permission notice shall be included in
-- all copies or substantial portions of the Software.
--
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-- IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
-- FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
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-- THE SOFTWARE.