Options.Applicative.Help.Chunk

Documentation

mappendWith :: Monoid a => a -> a -> a -> a

newtype Chunk a

The free monoid on a semigroup a.

Constructors

Chunk

Fields

• unChunk :: Maybe a

Instances

Monad Chunk

Methods

(>>=) :: Chunk a -> (a -> Chunk b) -> Chunk b

(>>) :: Chunk a -> Chunk b -> Chunk b

return :: a -> Chunk a

fail :: String -> Chunk a

Functor Chunk

Methods

fmap :: (a -> b) -> Chunk a -> Chunk b

(<$) :: a -> Chunk b -> Chunk a

Applicative Chunk

Methods

pure :: a -> Chunk a

(<*>) :: Chunk (a -> b) -> Chunk a -> Chunk b

(*>) :: Chunk a -> Chunk b -> Chunk b

(<*) :: Chunk a -> Chunk b -> Chunk a

Alternative Chunk

Methods

empty :: Chunk a

(<|>) :: Chunk a -> Chunk a -> Chunk a

some :: Chunk a -> Chunk [a]

many :: Chunk a -> Chunk [a]

MonadPlus Chunk

Methods

mzero :: Chunk a

mplus :: Chunk a -> Chunk a -> Chunk a

Eq a => Eq (Chunk a)

Methods

(==) :: Chunk a -> Chunk a -> Bool

(/=) :: Chunk a -> Chunk a -> Bool

Show a => Show (Chunk a)

Methods

showsPrec :: Int -> Chunk a -> ShowS

show :: Chunk a -> String

showList :: [Chunk a] -> ShowS

Monoid a => Monoid (Chunk a)

Methods

mempty :: Chunk a

mappend :: Chunk a -> Chunk a -> Chunk a

mconcat :: [Chunk a] -> Chunk a

chunked :: (a -> a -> a) -> Chunk a -> Chunk a -> Chunk a

Given a semigroup structure on a, return a monoid structure on 'Chunk a'.

Note that this is not the same as liftA2.

listToChunk :: Monoid a => [a] -> Chunk a

Concatenate a list into a Chunk. listToChunk satisfies:

isEmpty . listToChunk = null
listToChunk = mconcat . fmap pure

(<<+>>) :: Chunk Doc -> Chunk Doc -> Chunk Doc

Concatenate two Chunks with a space in between. If one is empty, this just returns the other one.

Unlike <+> for Doc, this operation has a unit element, namely the empty Chunk.

(<</>>) :: Chunk Doc -> Chunk Doc -> Chunk Doc

Concatenate two Chunks with a softline in between. This is exactly like <<+>>, but uses a softline instead of a space.

vcatChunks :: [Chunk Doc] -> Chunk Doc

Concatenate Chunks vertically.

vsepChunks :: [Chunk Doc] -> Chunk Doc

Concatenate Chunks vertically separated by empty lines.

isEmpty :: Chunk a -> Bool

Whether a Chunk is empty. Note that something like 'pure mempty' is not considered an empty chunk, even though the underlying Doc is empty.

stringChunk :: String -> Chunk Doc

Convert a String into a Chunk. This satisfies:

isEmpty . stringChunk = null
extractChunk . stringChunk = string

paragraph :: String -> Chunk Doc

Convert a paragraph into a Chunk. The resulting chunk is composed by the words of the original paragraph separated by softlines, so it will be automatically word-wrapped when rendering the underlying document.

This satisfies:

isEmpty . paragraph = null . words

extractChunk :: Monoid a => Chunk a -> a

Part of a constrained comonad instance.

This is the counit of the adjunction between Chunk and the forgetful functor from monoids to semigroups. It satisfies:

extractChunk . pure = id
extractChunk . fmap pure = id

tabulate :: [(Doc, Doc)] -> Chunk Doc

Display pairs of strings in a table.