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| GHC.Read | | Portability | non-portable (GHC Extensions) | | Stability | internal | | Maintainer | cvs-ghc@haskell.org |
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| Description |
| The Read class and instances for basic data types.
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| Synopsis |
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| Documentation |
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| class Read a where |
| | Methods | | | | Instances | | Read CChar | | Read CSChar | | Read CUChar | | Read CShort | | Read CUShort | | Read CInt | | Read CUInt | | Read CLong | | Read CULong | | Read CLLong | | Read CULLong | | Read CFloat | | Read CDouble | | Read CLDouble | | Read CPtrdiff | | Read CSize | | Read CWchar | | Read CSigAtomic | | Read CClock | | Read CTime | | Read Int8 | | Read Int16 | | Read Int32 | | Read Int64 | | Read Char | | Read Bool | | Read Ordering | | (Read a) => Read (Maybe a) | | (Read a, Read b) => Read (Either a b) | | (Read a) => Read [a] | | (Ix a, Read a, Read b) => Read (Array a b) | | Read Lexeme | | Read Int | | Read Integer | | Read Float | | Read Double | | (Integral a, Read a) => Read (Ratio a) | | Read () | | (Read a, Read b) => Read (a, b) | | (Read a, Read b, Read c) => Read (a, b, c) | | (Read a, Read b, Read c, Read d) => Read (a, b, c, d) | | (Read a, Read b, Read c, Read d, Read e) => Read (a, b, c, d, e) | | Read Word | | Read Word8 | | Read Word16 | | Read Word32 | | Read Word64 | | Read StdGen |
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| type ReadS a = String -> [(a, String)] |
| A parser for a type a, represented as a function that takes a
String and returns a list of possible parses (a,String) pairs. |
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| reads :: (Read a) => ReadS a |
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| readp :: (Read a) => ReadP a |
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| readEither :: (Read a) => String -> Either String a |
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| read :: (Read a) => String -> a |
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| lex :: ReadS String |
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| lexLitChar :: ReadS String |
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| readLitChar :: ReadS Char |
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| lexDigits :: ReadS String |
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| lexP :: ReadPrec Lexeme |
| Parse a single lexeme |
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| paren :: ReadPrec a -> ReadPrec a |
| (paren p) parses (P0)
where p parses P0 in precedence context zero |
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| parens :: ReadPrec a -> ReadPrec a |
| (parens p) parses P, (P0), ((P0)), etc,
where p parses P in the current precedence context
parses P0 in precedence context zero |
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| list :: ReadPrec a -> ReadPrec [a] |
| (list p) parses a list of things parsed by p,
using the usual square-bracket syntax. |
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| choose :: [(String, ReadPrec a)] -> ReadPrec a |
| Parse the specified lexeme and continue as specified.
Esp useful for nullary constructors; e.g.
choose [(A, return A), (B, return B)] |
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| readListDefault :: (Read a) => ReadS [a] |
| Use this to define the readList method, if you
don't want a special case |
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| readListPrecDefault :: (Read a) => ReadPrec [a] |
| Use this to define the readListPrec method, if you
don't want a special case |
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| readList__ :: ReadS a -> ReadS [a] |
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| readParen :: Bool -> ReadS a -> ReadS a |
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| Produced by Haddock version 0.4 |