[project @ 2001-06-28 14:15:04 by simonmar]
[packages/pretty.git] / Data / Ix.hs
1 -----------------------------------------------------------------------------
2 --
3 -- Module : Data.Ix
4 -- Copyright : (c) The University of Glasgow 2001
5 -- License : BSD-style (see the file libraries/core/LICENSE)
6 --
7 -- Maintainer : libraries@haskell.org
8 -- Stability : provisional
9 -- Portability : portable
10 --
11 -- $Id: Ix.hs,v 1.1 2001/06/28 14:15:02 simonmar Exp $
12 --
13 -- Class of index types.
14 --
15 -----------------------------------------------------------------------------
16
17 module Data.Ix
18 (
19 Ix
20 ( range -- :: (Ix a) => (a,a) -> [a]
21 , index -- :: (Ix a) => (a,a) -> a -> Int
22 , inRange -- :: (Ix a) => (a,a) -> a -> Bool
23 )
24 , rangeSize -- :: (Ix a) => (a,a) -> Int
25 -- Ix instances:
26 --
27 -- Ix Char
28 -- Ix Int
29 -- Ix Integer
30 -- Ix Bool
31 -- Ix Ordering
32 -- Ix ()
33 -- (Ix a, Ix b) => Ix (a, b)
34 -- ...
35
36 -- Implementation checked wrt. Haskell 98 lib report, 1/99.
37 ) where
38
39 import Prelude
40
41 #ifdef __GLASGOW_HASKELL__
42 import GHC.Arr
43 #endif