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Diffstat (limited to 'org-test/src/Test.hs')
| -rw-r--r-- | org-test/src/Test.hs | 460 |
1 files changed, 460 insertions, 0 deletions
diff --git a/org-test/src/Test.hs b/org-test/src/Test.hs new file mode 100644 index 00000000..d5632bfa --- /dev/null +++ b/org-test/src/Test.hs @@ -0,0 +1,460 @@ +{-# LANGUAGE Haskell2010 #-} +----------------------------------------------------------------------------- +-- | +-- 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. +{-# LANGUAGE Rank2Types, GADTs #-} +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' + , withType + , withoutType + ) where + +import Data.Maybe +import Hidden +import Visible + +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 + c = undefined + +-- ^ 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) + + [cat] a small, furry, domesticated mammal + + [pineapple] a fruit grown in the tropics + +@ + 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 + +-- | Comment on a definition without type signature +withoutType = undefined + +-- | Comment on a definition with type signature +withType :: Int +withType = 1 + +-- 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 |