-- GENERATED by C->Haskell Compiler, version 0.17.2 Crystal Seed, 24 Jan 2009 (Haskell)
-- Edit the ORIGNAL .chs file instead!


{-# LINE 1 "lib/CPython/Types/Iterator.chs" #-}
{-# LANGUAGE ForeignFunctionInterface #-}

-- Copyright (C) 2009 John Millikin <jmillikin@gmail.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 3 of the License, or
-- 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, see <http://www.gnu.org/licenses/>.

module CPython.Types.Iterator
	( SequenceIterator
	, sequenceIteratorType
	, sequenceIteratorNew
	
	, CallableIterator
	, callableIteratorType
	, callableIteratorNew
	) where



import           CPython.Internal

newtype SequenceIterator = SequenceIterator (ForeignPtr SequenceIterator)

instance Iterator SequenceIterator where
	toIterator = unsafeCastToIterator

instance Object SequenceIterator where
	toObject (SequenceIterator x) = SomeObject x
	fromForeignPtr = SequenceIterator

instance Concrete SequenceIterator where
	concreteType _ = sequenceIteratorType

newtype CallableIterator = CallableIterator (ForeignPtr CallableIterator)

instance Iterator CallableIterator where
	toIterator = unsafeCastToIterator

instance Object CallableIterator where
	toObject (CallableIterator x) = SomeObject x
	fromForeignPtr = CallableIterator

instance Concrete CallableIterator where
	concreteType _ = callableIteratorType

sequenceIteratorType :: (Type)
sequenceIteratorType =
  unsafePerformIO $
  let {res = sequenceIteratorType'_} in
  peekStaticObject res >>= \res' ->
  return (res')

{-# LINE 57 "lib/CPython/Types/Iterator.chs" #-}


callableIteratorType :: (Type)
callableIteratorType =
  unsafePerformIO $
  let {res = callableIteratorType'_} in
  peekStaticObject res >>= \res' ->
  return (res')

{-# LINE 60 "lib/CPython/Types/Iterator.chs" #-}


-- | Return an 'Iterator' that works with a general sequence object, /seq/.
-- The iteration ends when the sequence raises @IndexError@ for the
-- subscripting operation.
sequenceIteratorNew :: Sequence seq => (seq) -> IO ((SequenceIterator))
sequenceIteratorNew a1 =
  withObject a1 $ \a1' -> 
  sequenceIteratorNew'_ a1' >>= \res ->
  stealObject res >>= \res' ->
  return (res')

{-# LINE 68 "lib/CPython/Types/Iterator.chs" #-}


-- | Return a new 'Iterator'. The first parameter, /callable/, can be any
-- Python callable object that can be called with no parameters; each call
-- to it should return the next item in the iteration. When /callable/
-- returns a value equal to /sentinel/, the iteration will be terminated.
callableIteratorNew :: (Object callable, Object sentinel) => (callable) -> (sentinel) -> IO ((CallableIterator))
callableIteratorNew a1 a2 =
  withObject a1 $ \a1' -> 
  withObject a2 $ \a2' -> 
  callableIteratorNew'_ a1' a2' >>= \res ->
  stealObject res >>= \res' ->
  return (res')

{-# LINE 78 "lib/CPython/Types/Iterator.chs" #-}


foreign import ccall unsafe "CPython/Types/Iterator.chs.h hscpython_PySeqIter_Type"
  sequenceIteratorType'_ :: (Ptr ())

foreign import ccall unsafe "CPython/Types/Iterator.chs.h hscpython_PyCallIter_Type"
  callableIteratorType'_ :: (Ptr ())

foreign import ccall safe "CPython/Types/Iterator.chs.h PySeqIter_New"
  sequenceIteratorNew'_ :: ((Ptr ()) -> (IO (Ptr ())))

foreign import ccall safe "CPython/Types/Iterator.chs.h PyCallIter_New"
  callableIteratorNew'_ :: ((Ptr ()) -> ((Ptr ()) -> (IO (Ptr ()))))