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------------------------------------------------------------------------------
--- |
--- Module : Test
--- Copyright : (c) Simon Marlow 2002
--- License : BSD-style
---
--- Maintainer : libraries@haskell.org
--- Stability : provisional
--- Portability : portable
---
--- This module illustrates & tests most of the features of Haddock.
--- Testing references from the description: 'T', 'f', 'g', 'Visible.visible'.
---
------------------------------------------------------------------------------
-
--- This is plain comment, ignored by Haddock.
-
-module Test (
-
- -- Section headings are introduced with '-- *':
- -- * Type declarations
-
- -- Subsection headings are introduced with '-- **' and so on.
- -- ** Data types
- T(..), T2, T3(..), T4(..), T5(..), T6(..),
- N1(..), N2(..), N3(..), N4, N5(..), N6(..), N7(..),
-
- -- ** Records
- R(..), R1(..),
-
- -- | test that we can export record selectors on their own:
- p, q, u,
-
- -- * Class declarations
- C(a,b), D(..), E, F(..),
-
- -- | Test that we can export a class method on its own:
- a,
-
- -- * Function types
- f, g,
-
- -- * Auxiliary stuff
-
- -- $aux1
-
- -- $aux2
-
- -- $aux3
-
- -- $aux4
-
- -- $aux5
-
- -- $aux6
-
- -- $aux7
-
- -- $aux8
-
- -- $aux9
-
- -- $aux10
-
- -- $aux11
-
- -- $aux12
-
- -- | This is some inline documentation in the export list
- --
- -- > a code block using bird-tracks
- -- > each line must begin with > (which isn't significant unless it
- -- > is at the beginning of the line).
-
- -- * A hidden module
- module Hidden,
-
- -- * A visible module
- module Visible,
-
- {-| nested-style doc comments -}
-
- -- * Existential \/ Universal types
- Ex(..),
-
- -- * Type signatures with argument docs
- k, l, m, o,
-
- -- * A section
- -- and without an intervening comma:
- -- ** A subsection
-
-{-|
- > a literal line
-
- $ a non /literal/ line $
--}
-
- f'
- ) where
-
-import Hidden
-import Visible
-import Data.Maybe
-
-bla = Nothing
-
--- | 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 data declaration documentation on the constructors only
-data T5 a b
- = A3 a -- ^ documents 'A3'
- | B3 b -- ^ documents 'B3'
-
--- | Testing alternative comment styles
-data T6
- -- | This is the doc for 'A4'
- = A4
- | B4
- | -- ^ This is the doc for 'B4'
-
- -- | This is the doc for 'C4'
- C4
-
--- | A newtype
-newtype N1 a = N1 a
-
--- | 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
-
-newtype N5 a b = N5 {n5 :: a b -- ^ no docs on the datatype or the constructor
- }
-
-newtype N6 a b = N6 {n6 :: a b
- }
- -- ^ docs on the constructor only
-
--- | docs on the newtype and the constructor
-newtype N7 a b = N7 {n7 :: a b
- }
- -- ^ The 'N7' constructor
-
-
-class (D a) => C a where
- -- |this is a description of the 'a' method
- a :: IO a
- b :: [a]
- -- ^ this is a description of the 'b' method
- c :: a -- 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
-
-instance D Int where
- d = undefined
- e = undefined
-
--- instance with a qualified class name
-instance Test.D Float where
- d = undefined
- e = undefined
-
-class E a where
- ee :: a
--- ^ 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 :: a
-
--- | This is the documentation for the 'R' record, which has four fields,
--- 'p', 'q', 'r', and 's'.
-data R =
- -- | This is the 'C1' record constructor, with the following fields:
- 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
- }
- | C2 { t :: T1 -> (T2 Int Int)-> (T3 Bool Bool) -> (T4 Float Float) -> T5 () (),
- u,v :: Int
- }
- -- ^ This is the 'C2' record constructor, also with some fields:
-
--- | Testing different record commenting styles
-data R1
- -- | This is the 'C3' record constructor
- = C3 {
- -- | The 's1' record selector
- s1 :: Int
- -- | The 's2' record selector
- , s2 :: Int
- , s3 :: Int -- NOTE: In the original examples/Test.hs in Haddock, there is an extra "," here.
- -- Since GHC doesn't allow that, I have removed it in this file.
- -- ^ The 's3' record selector
- }
-
--- 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
-@
-
-> this is another block of code
-
-We can also include URLs in documentation: <http://www.haskell.org/>.
--}
-
-f :: C a => a -> 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
-
-
--- $aux1 This is some documentation that is attached to a name ($aux1)
--- rather than a source declaration. The documentation may be
--- referred to in the export list using its name.
---
--- @ code block in named doc @
-
--- $aux2 This is some documentation that is attached to a name ($aux2)
-
--- $aux3
--- @ code block on its own in named doc @
-
--- $aux4
---
--- @ code block on its own in named doc (after newline) @
-
-{- $aux5 a nested, named doc comment
-
- with a paragraph,
-
- @ and a code block @
--}
-
--- some tests for various arrangements of code blocks:
-
-{- $aux6
->test
->test1
-
-@ test2
- test3
-@
--}
-
-{- $aux7
-@
-test1
-test2
-@
--}
-
-{- $aux8
->test3
->test4
--}
-
-{- $aux9
-@
-test1
-test2
-@
-
->test3
->test4
--}
-
-{- $aux10
->test3
->test4
-
-@
-test1
-test2
-@
--}
-
--- This one is currently wrong (Haddock 0.4). The @...@ part is
--- interpreted as part of the bird-tracked code block.
-{- $aux11
-aux11:
-
->test3
->test4
-
-@
-test1
-test2
-@
--}
-
--- $aux12
--- > foo
---
--- > bar
---
-
--- | A data-type using existential\/universal types
-data Ex a
- = forall b . C b => Ex1 b
- | forall b . Ex2 b
- | forall b . C a => Ex3 b -- NOTE: I have added "forall b" here make GHC accept this file
- | Ex4 (forall a . a -> a)
-
--- | This is a function with documentation for each argument
-k :: T () () -- ^ This argument has type 'T'
- -> (T2 Int Int) -- ^ This argument has type 'T2 Int Int'
- -> (T3 Bool Bool -> T4 Float Float) -- ^ This argument has type @T3 Bool Bool -> T4 Float Float@
- -> T5 () () -- ^ This argument has a very long description that should
- -- hopefully cause some wrapping to happen when it is finally
- -- rendered by Haddock in the generated HTML page.
- -> IO () -- ^ This is the result type
-
--- This function has arg docs but no docs for the function itself
-l :: (Int, Int, Float) -- ^ takes a triple
- -> Int -- ^ returns an 'Int'
-
--- | This function has some arg docs
-m :: R
- -> N1 () -- ^ one of the arguments
- -> IO Int -- ^ and the return value
-
--- | This function has some arg docs but not a return value doc
-
--- can't use the original name ('n') with GHC
-newn :: R -- ^ one of the arguments, an 'R'
- -> N1 () -- ^ one of the arguments
- -> IO Int
-newn = undefined
-
-
--- | A foreign import with argument docs
-foreign import ccall unsafe
- o :: Float -- ^ The input float
- -> IO Float -- ^ The output float
-
--- | We should be able to escape this: \#\#\#
-
--- p :: Int
--- can't use the above original definition with GHC
-newp :: Int
-newp = undefined
-
--- | a function with a prime can be referred to as 'f''
--- but f' doesn't get link'd 'f\''
-f' :: Int
-
-
--- Add some definitions here so that this file can be compiled with GHC
-
-data T1
-f = undefined
-f' = undefined
-type CInt = Int
-k = undefined
-l = undefined
-m = undefined
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