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|
-----------------------------------------------------------------------------
-- |
-- Module : Foo
-- Copyright : (c) Simon Marlow 2002
-- License : BSD-style
--
-- Maintainer : libraries@haskell.org
-- Stability : provisional
-- Portability : portable
--
-- This is the module comment for the "Foo" module
--
-----------------------------------------------------------------------------
-- This is plain comment, ignored by Haddock.
module Foo (
-- Section headings are introduced with '-- *':
-- * Type declarations
-- Subsection headings are introduced with '-- **' and so on.
-- ** Data types
T(..), T2, T3(..), T4(..),
N1(..), N2(..), N3(..), N4,
-- ** Records
R(..),
-- * Class declarations
C(a,b), D(..), E, F(..),
-- * Function types
f, g,
-- * Auxiliary stuff
-- $aux
) where
-- | This comment applies to the /following/ declaration
-- and it continues until the next non-comment line
data T a b
= A Int (Maybe Float) -- ^ This comment describes the 'A' constructor
| -- | This comment describes the 'B' constructor
B (T a b, T Int Float) -- ^
-- | An abstract data declaration
data T2 a b = T2 a b
-- | A data declaration with no documentation annotations on the constructors
data T3 a b = A1 a | B1 b
-- A data declaration with no documentation annotations at all
data T4 a b = A2 a | B2 b
-- | A newtype
newtype N1 a b = N1 (a b)
-- | A newtype with a fieldname
newtype N2 a b = N2 {n :: a b}
-- | A newtype with a fieldname, documentation on the field
newtype N3 a b = N3 {n3 :: a b -- ^ this is the 'n3' field
}
-- | An abstract newtype - we show this one as data rather than newtype because
-- the difference isn\'t visible to the programmer for an abstract type.
newtype N4 a b = N4 a
class (D a) => C a where
-- |this is a description of the 'a' method
a :: Int
b :: Float
-- ^ this is a description of the 'b' method
c :: Double -- c is hidden in the export list
-- ^ This comment applies to the /previous/ declaration (the 'C' class)
class D a where
d :: T a b
e :: (a,a)
-- ^ This is a class declaration with no separate docs for the methods
class E a where
ee :: Int
-- ^ This is a class declaration with no methods (or no methods exported)
-- This is a class declaration with no documentation at all
class F a where
ff :: Float
-- | This is the documentation for the 'R' record, which has four fields,
-- 'p', 'q', 'r', and 's'.
data R =
C1 { p :: Int -- ^ This comment applies to the 'p' field
, q :: forall a . a->a -- ^ This comment applies to the 'q' field
, -- | This comment applies to both 'r' and 's'
r,s :: Int
}
-- These section headers are only used when there is no export list to
-- give the structure of the documentation:
-- * This is a section header (level 1)
-- ** This is a section header (level 2)
-- *** This is a section header (level 3)
-- | In a comment string we can refer to identifiers in scope with
-- single quotes like this: 'T', and we can refer to modules by
-- using double quotes: "Foo". We can add emphasis /like this/.
--
-- * This is a bulleted list
--
-- - This is the next item (different kind of bullet)
--
-- (1) This is an ordered list
--
-- 2. This is the next item (different kind of bullet)
--
-- [
-- This is a block of code, which can include other markup: 'R'
-- formatting
-- is
-- significant
-- ]
--
-- We can also include URLs in documentation: <http://www.haskell.org/>.
f :: C a => Int -> Int
-- | we can export foreign declarations too
foreign import ccall g :: Int -> IO CInt
-- | this doc string has a parse error in it: '
h :: Int
h = 42
-- $aux This is some documentation that is attached to a name ($aux)
-- rather than a source declaration. The documentation may be
-- referred to in the export list using its name.
|
