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|
{-# OPTIONS -fno-implicit-prelude #-}
-----------------------------------------------------------------------------
-- |
-- Module : Prelude
-- Copyright : (c) The University of Glasgow 2001
-- License : BSD-style (see the file libraries/base/LICENSE)
--
-- Maintainer : libraries@haskell.org
-- Stability : provisional
-- Portability : portable
--
-- The Prelude: a standard module imported by default into all Haskell
-- modules. For more documentation, see the Haskell 98 Report
-- <http://www.haskell.org/onlinereport/>.
--
-----------------------------------------------------------------------------
module Prelude (
-- * Basic data types
Bool(False, True),
Maybe(Nothing, Just),
Either(Left, Right),
Ordering(LT, EQ, GT),
Char, String, Int, Integer, Float, Double, IO,
Rational,
#if defined(__NHC__)
[]((:), []), -- Not legal Haskell 98;
-- ... available through built-in syntax
module Data.Tuple, -- Includes tuple types
()(..), -- Not legal Haskell 98
(->), -- ... available through built-in syntax
#endif
#ifdef __HUGS__
(:), -- Not legal Haskell 98
#endif
-- * Basic type classes
Eq((==), (/=)),
Ord(compare, (<), (<=), (>=), (>), max, min),
Enum(succ, pred, toEnum, fromEnum, enumFrom, enumFromThen,
enumFromTo, enumFromThenTo),
Bounded(minBound, maxBound),
-- * Numeric type classes
Num((+), (-), (*), negate, abs, signum, fromInteger),
Real(toRational),
Integral(quot, rem, div, mod, quotRem, divMod, toInteger),
Fractional((/), recip, fromRational),
Floating(pi, exp, log, sqrt, (**), logBase, sin, cos, tan,
asin, acos, atan, sinh, cosh, tanh, asinh, acosh, atanh),
RealFrac(properFraction, truncate, round, ceiling, floor),
RealFloat(floatRadix, floatDigits, floatRange, decodeFloat,
encodeFloat, exponent, significand, scaleFloat, isNaN,
isInfinite, isDenormalized, isIEEE, isNegativeZero, atan2),
-- * List operations
map, (++), filter, concat,
head, last, tail, init, null, length, (!!),
foldl, foldl1, scanl, scanl1, foldr, foldr1, scanr, scanr1,
iterate, repeat, replicate, cycle,
take, drop, splitAt, takeWhile, dropWhile, span, break,
reverse, and, or,
any, all, elem, notElem, lookup,
maximum, minimum, concatMap,
zip, zip3, zipWith, zipWith3, unzip, unzip3,
lines, words, unlines, unwords,
sum, product,
-- * Converting to and from @String@
ReadS, ShowS,
Read(readsPrec, readList),
Show(showsPrec, showList, show),
reads, shows, read, lex,
showChar, showString, readParen, showParen,
-- * Simple I\/O operations
ioError, userError, catch,
FilePath, IOError,
putChar,
putStr, putStrLn, print,
getChar,
getLine, getContents, interact,
readFile, writeFile, appendFile, readIO, readLn,
-- * Monads
Monad((>>=), (>>), return, fail),
Functor(fmap),
mapM, mapM_, sequence, sequence_, (=<<),
-- * Miscellaneous functions
maybe, either,
(&&), (||), not, otherwise,
subtract, even, odd, gcd, lcm, (^), (^^),
fromIntegral, realToFrac,
fst, snd, curry, uncurry,
id, const, (.), flip, ($), until,
asTypeOf, error, undefined,
seq, ($!)
) where
#ifndef __HUGS__
import Control.Monad
import System.IO
import Text.Read
import Text.Show
import Data.List
import Data.Either
import Data.Maybe
import Data.Bool
import Data.Tuple
#endif
#ifdef __GLASGOW_HASKELL__
import GHC.Base
import GHC.IOBase
import GHC.Exception
import GHC.Read
import GHC.Enum
import GHC.Num
import GHC.Real
import GHC.Float
import GHC.Show
import GHC.Conc
import GHC.Err ( error, undefined )
#endif
#ifdef __HUGS__
import Hugs.Prelude
#endif
#ifndef __HUGS__
infixr 0 $!
-- -----------------------------------------------------------------------------
-- Miscellaneous functions
($!) :: (a -> b) -> a -> b
f $! x = x `seq` f x
#endif
|
