content: --
  -- Copyright (c) 2013-2023 Nicola Bonelli <nicola@larthia.com>
  --
  -- This program 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 of the License, or
  -- (at your option) any later version.
  --
  -- This program 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
  -- along with this program; if not, write to the Free Software
  -- Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
  --
  
  module CGrep.Boundary (
      Boundary (..),
      BoundaryType (..),
      pattern Begin,
      pattern End,
  ) where
  
  import qualified Data.ByteString.Char8 as C
  import Data.Word (Word8)
  
  data Boundary = Boundary
      { bBegin :: C.ByteString
      , bEnd :: C.ByteString
      }
      deriving stock (Show, Eq)
  
  newtype BoundaryType = BoundaryType {unpackBoundaryType :: Word8}
      deriving newtype (Eq, Ord)
  
  instance Show BoundaryType where
      show Begin = "begin"
      show End = "end"
  
  pattern Begin :: BoundaryType
  pattern Begin = BoundaryType 0
  pattern End :: BoundaryType
  pattern End = BoundaryType 1
  
  {-# COMPLETE Begin, End #-}