pretty-compact (empty) → 1.0
raw patch · 5 files changed
+1417/−0 lines, 5 filesdep +basesetup-changed
Dependencies added: base
Files
- LICENSE +675/−0
- Setup.hs +2/−0
- Text/PrettyPrint/Compact.hs +569/−0
- Text/PrettyPrint/Compact/Core.hs +142/−0
- pretty-compact.cabal +29/−0
+ LICENSE view
@@ -0,0 +1,675 @@+GNU GENERAL PUBLIC LICENSE+ Version 3, 29 June 2007++ Copyright (C) 2007 Free Software Foundation, Inc. <http://fsf.org/>+ Everyone is permitted to copy and distribute verbatim copies+ of this license document, but changing it is not allowed.++ Preamble++ The GNU General Public License is a free, copyleft license for+software and other kinds of works.++ The licenses for most software and other practical works are designed+to take away your freedom to share and change the works. By contrast,+the GNU General Public License is intended to guarantee your freedom to+share and change all versions of a program--to make sure it remains free+software for all its users. We, the Free Software Foundation, use the+GNU General Public License for most of our software; it applies also to+any other work released this way by its authors. You can apply it to+your programs, too.++ When we speak of free software, we are referring to freedom, not+price. 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+ Setup.hs view
@@ -0,0 +1,2 @@+import Distribution.Simple+main = defaultMain
+ Text/PrettyPrint/Compact.hs view
@@ -0,0 +1,569 @@+{-# LANGUAGE OverloadedStrings #-}++module Text.PrettyPrint.Compact (+ -- * Documents+ Doc, ++ -- * Basic combinators+ mempty, char, text, (<>), nest, line, linebreak, group, softline,+ softbreak,++ -- * Alignment+ --+ -- The combinators in this section can not be described by Wadler's+ -- original combinators. They align their output relative to the+ -- current output position - in contrast to @nest@ which always+ -- aligns to the current nesting level. This deprives these+ -- combinators from being \`optimal\'. In practice however they+ -- prove to be very useful. The combinators in this section should+ -- be used with care, since they are more expensive than the other+ -- combinators. For example, @align@ shouldn't be used to pretty+ -- print all top-level declarations of a language, but using @hang@+ -- for let expressions is fine.+ align, hang, indent, encloseSep, list, tupled, semiBraces,++ -- * Operators+ (<+>), (<$>), (</>), (<$$>), (<//>),++ -- * List combinators+ hsep, vsep, fillSep, sep, hcat, vcat, fillCat, cat, punctuate,++ -- * Fillers+ fill, fillBreak,++ -- * Bracketing combinators+ enclose, squotes, dquotes, parens, angles, braces, brackets,++ -- * Character documents+ lparen, rparen, langle, rangle, lbrace, rbrace, lbracket, rbracket,+ squote, dquote, semi, colon, comma, space, dot, backslash, equals,++ -- * Primitive type documents+ string, int, integer, float, double, rational,+ bool,++ -- * Rendering+ render,++ -- * Undocumented+ -- column, nesting, width+ ) where++import Control.Applicative+import Data.Monoid++import Text.PrettyPrint.Compact.Core as Text.PrettyPrint.Compact++type Indentation = Int++infixr 5 </>,<//>,<$$$>,<$$>+infixr 6 <+>++-- | The document @(list xs)@ comma separates the documents @xs@ and+-- encloses them in square brackets. The documents are rendered+-- horizontally if that fits the page. Otherwise they are aligned+-- vertically. All comma separators are put in front of the elements.+list :: [Doc] -> Doc+list = encloseSep lbracket rbracket comma++-- | The document @(tupled xs)@ comma separates the documents @xs@ and+-- encloses them in parenthesis. The documents are rendered+-- horizontally if that fits the page. Otherwise they are aligned+-- vertically. All comma separators are put in front of the elements.+tupled :: [Doc] -> Doc+tupled = encloseSep lparen rparen comma+++-- | The document @(semiBraces xs)@ separates the documents @xs@ with+-- semi colons and encloses them in braces. The documents are rendered+-- horizontally if that fits the page. Otherwise they are aligned+-- vertically. All semi colons are put in front of the elements.+semiBraces :: [Doc] -> Doc+semiBraces = encloseSep lbrace rbrace semi++-- | The document @(enclosure l r sep xs)@ concatenates the documents+-- @xs@ separated by @sep@ and encloses the resulting document by @l@+-- and @r@. The documents are rendered horizontally if that fits the+-- page. Otherwise they are aligned vertically. All separators are put+-- in front of the elements. For example, the combinator 'list' can be+-- defined with @enclosure@:+--+-- > list xs = enclosure lbracket rbracket comma xs+-- > test = text "list" <+> (list (map int [10,200,3000]))+--+-- Which is layed out with a page width of 20 as:+--+-- @+-- list [10,200,3000]+-- @+--+-- But when the page width is 15, it is layed out as:+--+-- @+-- list [10+-- ,200+-- ,3000]+-- @+encloseSep :: Doc -> Doc -> Doc -> [Doc] -> Doc+encloseSep left right sep ds+ = case ds of+ [] -> left <> right+ [d] -> left <> d <> right+ _ -> align (cat (zipWith (<>) (left : repeat sep) ds) <> right)++-----------------------------------------------------------+-- punctuate p [d1,d2,...,dn] => [d1 <> p,d2 <> p, ... ,dn]+-----------------------------------------------------------+++-- | @(punctuate p xs)@ concatenates all documents in @xs@ with+-- document @p@ except for the last document.+--+-- > someText = map text ["words","in","a","tuple"]+-- > test = parens (align (cat (punctuate comma someText)))+--+-- This is layed out on a page width of 20 as:+--+-- @+-- (words,in,a,tuple)+-- @+--+-- But when the page width is 15, it is layed out as:+--+-- @+-- (words,+-- in,+-- a,+-- tuple)+-- @+--+-- (If you want put the commas in front of their elements instead of+-- at the end, you should use 'tupled' or, in general, 'encloseSep'.)+punctuate :: Doc -> [Doc] -> [Doc]+punctuate p [] = []+punctuate p [d] = [d]+punctuate p (d:ds) = (d <> p) : punctuate p ds+++-----------------------------------------------------------+-- high-level combinators+-----------------------------------------------------------+++-- | The document @(sep xs)@ concatenates all documents @xs@ either+-- horizontally with @(\<+\>)@, if it fits the page, or vertically with+-- @(\<$\>)@.+--+-- > sep xs = group (vsep xs)+sep :: [Doc] -> Doc+sep = group . vsep++-- | The document @(fillSep xs)@ concatenates documents @xs@+-- horizontally with @(\<+\>)@ as long as its fits the page, than+-- inserts a @line@ and continues doing that for all documents in+-- @xs@.+--+-- > fillSep xs = foldr (\<\/\>) empty xs+fillSep :: [Doc] -> Doc+fillSep = foldDoc (</>)++-- | The document @(hsep xs)@ concatenates all documents @xs@+-- horizontally with @(\<+\>)@.+hsep :: [Doc] -> Doc+hsep = foldDoc (<+>)+++-- | The document @(vsep xs)@ concatenates all documents @xs@+-- vertically with @(\<$\>)@. If a 'group' undoes the line breaks+-- inserted by @vsep@, all documents are separated with a space.+--+-- > someText = map text (words ("text to lay out"))+-- >+-- > test = text "some" <+> vsep someText+--+-- This is layed out as:+--+-- @+-- some text+-- to+-- lay+-- out+-- @+--+-- The 'align' combinator can be used to align the documents under+-- their first element+--+-- > test = text "some" <+> align (vsep someText)+--+-- Which is printed as:+--+-- @+-- some text+-- to+-- lay+-- out+-- @+vsep :: [Doc] -> Doc+vsep = foldDoc (<$$$>)++-- | The document @(cat xs)@ concatenates all documents @xs@ either+-- horizontally with @(\<\>)@, if it fits the page, or vertically with+-- @(\<$$\>)@.+--+-- > cat xs = group (vcat xs)+cat :: [Doc] -> Doc+cat = group . vcat++-- | The document @(fillCat xs)@ concatenates documents @xs@+-- horizontally with @(\<\>)@ as long as its fits the page, than inserts+-- a @linebreak@ and continues doing that for all documents in @xs@.+--+-- > fillCat xs = foldr (\<\/\/\>) empty xs+fillCat :: [Doc] -> Doc+fillCat = foldDoc (<//>)++-- | The document @(hcat xs)@ concatenates all documents @xs@+-- horizontally with @(\<\>)@.+hcat :: [Doc] -> Doc+hcat = foldDoc (<>)++-- | The document @(vcat xs)@ concatenates all documents @xs@+-- vertically with @(\<$$\>)@. If a 'group' undoes the line breaks+-- inserted by @vcat@, all documents are directly concatenated.+vcat :: [Doc] -> Doc+vcat = foldDoc (<$$>)++foldDoc :: (Doc -> Doc -> Doc) -> [Doc] -> Doc+foldDoc f [] = mempty+foldDoc f ds = foldr1 f ds++-- | The document @(x \<+\> y)@ concatenates document @x@ and @y@ with a+-- @space@ in between. (infixr 6)+(<+>) :: Doc -> Doc -> Doc+x <+> y = x <> space <> y++-- | The document @(x \<\/\> y)@ concatenates document @x@ and @y@ with a+-- 'softline' in between. This effectively puts @x@ and @y@ either+-- next to each other (with a @space@ in between) or underneath each+-- other. (infixr 5)+(</>) :: Doc -> Doc -> Doc+x </> y = x <> softline <> y++-- | The document @(x \<\/\/\> y)@ concatenates document @x@ and @y@ with+-- a 'softbreak' in between. This effectively puts @x@ and @y@ either+-- right next to each other or underneath each other. (infixr 5)+(<//>) :: Doc -> Doc -> Doc+x <//> y = x <> softbreak <> y++-- | The document @(x \<$\> y)@ concatenates document @x@ and @y@ with a+-- 'line' in between. (infixr 5)+(<$$$>) :: Doc -> Doc -> Doc+x <$$$> y = x <> line <> y++-- | The document @(x \<$$\> y)@ concatenates document @x@ and @y@ with+-- a @linebreak@ in between. (infixr 5)+(<$$>) :: Doc -> Doc -> Doc+x <$$> y = x <> linebreak <> y++-- | The document @softline@ behaves like 'space' if the resulting+-- output fits the page, otherwise it behaves like 'line'.+--+-- > softline = group line+softline :: Doc+softline = group line++-- | The document @softbreak@ behaves like 'empty' if the resulting+-- output fits the page, otherwise it behaves like 'line'.+--+-- > softbreak = group linebreak+softbreak :: Doc+softbreak = group linebreak++-- | Document @(squotes x)@ encloses document @x@ with single quotes+-- \"'\".+squotes :: Doc -> Doc+squotes = enclose squote squote++-- | Document @(dquotes x)@ encloses document @x@ with double quotes+-- '\"'.+dquotes :: Doc -> Doc+dquotes = enclose dquote dquote++-- | Document @(braces x)@ encloses document @x@ in braces, \"{\" and+-- \"}\".+braces :: Doc -> Doc+braces = enclose lbrace rbrace++-- | Document @(parens x)@ encloses document @x@ in parenthesis, \"(\"+-- and \")\".+parens :: Doc -> Doc+parens = enclose lparen rparen++-- | Document @(angles x)@ encloses document @x@ in angles, \"\<\" and+-- \"\>\".+angles :: Doc -> Doc+angles = enclose langle rangle++-- | Document @(brackets x)@ encloses document @x@ in square brackets,+-- \"[\" and \"]\".+brackets :: Doc -> Doc+brackets = enclose lbracket rbracket++-- | The document @(enclose l r x)@ encloses document @x@ between+-- documents @l@ and @r@ using @(\<\>)@.+enclose :: Doc -> Doc -> Doc -> Doc+enclose l r x = l <> x <> r++char :: Char -> Doc+char x = text [x]++-- | The document @lparen@ contains a left parenthesis, \"(\".+lparen :: Doc+lparen = char '('+-- | The document @rparen@ contains a right parenthesis, \")\".+rparen :: Doc+rparen = char ')'+-- | The document @langle@ contains a left angle, \"\<\".+langle :: Doc+langle = char '<'+-- | The document @rangle@ contains a right angle, \">\".+rangle :: Doc+rangle = char '>'+-- | The document @lbrace@ contains a left brace, \"{\".+lbrace :: Doc+lbrace = char '{'+-- | The document @rbrace@ contains a right brace, \"}\".+rbrace :: Doc+rbrace = char '}'+-- | The document @lbracket@ contains a left square bracket, \"[\".+lbracket :: Doc+lbracket = char '['+-- | The document @rbracket@ contains a right square bracket, \"]\".+rbracket :: Doc+rbracket = char ']'+++-- | The document @squote@ contains a single quote, \"'\".+squote :: Doc+squote = char '\''+-- | The document @dquote@ contains a double quote, '\"'.+dquote :: Doc+dquote = char '"'+-- | The document @semi@ contains a semi colon, \";\".+semi :: Doc+semi = char ';'+-- | The document @colon@ contains a colon, \":\".+colon :: Doc+colon = char ':'+-- | The document @comma@ contains a comma, \",\".+comma :: Doc+comma = char ','++-- | The document @dot@ contains a single dot, \".\".+dot :: Doc+dot = char '.'+-- | The document @backslash@ contains a back slash, \"\\\".+backslash :: Doc+backslash = char '\\'+-- | The document @equals@ contains an equal sign, \"=\".+equals :: Doc+equals = char '='++-----------------------------------------------------------+-- Combinators for prelude types+-----------------------------------------------------------++-- string is like "text" but replaces '\n' by "line"++-- | The document @(string s)@ concatenates all characters in @s@+-- using @line@ for newline characters and @char@ for all other+-- characters. It is used instead of 'text' whenever the text contains+-- newline characters.+string :: String -> Doc+string "" = mempty+string ('\n':s) = line <> string s+string s = case (span (/='\n') s) of+ (xs,ys) -> text xs <> string ys++bool :: Bool -> Doc+bool b = text (show b)++-- | The document @(int i)@ shows the literal integer @i@ using+-- 'text'.+int :: Int -> Doc+int i = text (show i)++-- | The document @(integer i)@ shows the literal integer @i@ using+-- 'text'.+integer :: Integer -> Doc+integer i = text (show i)++-- | The document @(float f)@ shows the literal float @f@ using+-- 'text'.+float :: Float -> Doc+float f = text (show f)++-- | The document @(double d)@ shows the literal double @d@ using+-- 'text'.+double :: Double -> Doc+double d = text (show d)++-- | The document @(rational r)@ shows the literal rational @r@ using+-- 'text'.+rational :: Rational -> Doc+rational r = text (show r)++-----------------------------------------------------------+-- semi primitive: fill and fillBreak+-----------------------------------------------------------++-- | The document @(fillBreak i x)@ first renders document @x@. It+-- than appends @space@s until the width is equal to @i@. If the+-- width of @x@ is already larger than @i@, the nesting level is+-- increased by @i@ and a @line@ is appended. When we redefine @ptype@+-- in the previous example to use @fillBreak@, we get a useful+-- variation of the previous output:+--+-- > ptype (name,tp)+-- > = fillBreak 6 (text name) <+> text "::" <+> text tp+--+-- The output will now be:+--+-- @+-- let empty :: Doc+-- nest :: Indentation -> Doc -> Doc+-- linebreak+-- :: Doc+-- @+fillBreak :: Indentation -> Doc -> Doc+fillBreak f x = width x (\w ->+ if (w > f) then nest f linebreak+ else spacing (f - w))+++-- | The document @(fill i x)@ renders document @x@. It than appends+-- @space@s until the width is equal to @i@. If the width of @x@ is+-- already larger, nothing is appended. This combinator is quite+-- useful in practice to output a list of bindings. The following+-- example demonstrates this.+--+-- > types = [("empty","Doc")+-- > ,("nest","Indentation -> Doc -> Doc")+-- > ,("linebreak","Doc")]+-- >+-- > ptype (name,tp)+-- > = fill 6 (text name) <+> text "::" <+> text tp+-- >+-- > test = text "let" <+> align (vcat (map ptype types))+--+-- Which is layed out as:+--+-- @+-- let empty :: Doc+-- nest :: Indentation -> Doc -> Doc+-- linebreak :: Doc+-- @+fill :: Indentation -> Doc -> Doc+fill f d = width d (\w ->+ if (w >= f) then mempty+ else spacing (f - w))++width :: Doc -> (Indentation -> Doc) -> Doc+width d f = column (\k1 -> d <> column (\k2 -> f (k2 - k1)))+++-----------------------------------------------------------+-- semi primitive: Alignment and indentation+-----------------------------------------------------------++-- | The document @(indent i x)@ indents document @x@ with @i@ spaces.+--+-- > test = indent 4 (fillSep (map text+-- > (words "the indent combinator indents these words !")))+--+-- Which lays out with a page width of 20 as:+--+-- @+-- the indent+-- combinator+-- indents these+-- words !+-- @+indent :: Indentation -> Doc -> Doc+indent i d = hang i (spacing i <> d)++-- | The hang combinator implements hanging indentation. The document+-- @(hang i x)@ renders document @x@ with a nesting level set to the+-- current column plus @i@. The following example uses hanging+-- indentation for some text:+--+-- > test = hang 4 (fillSep (map text+-- > (words "the hang combinator indents these words !")))+--+-- Which lays out on a page with a width of 20 characters as:+--+-- @+-- the hang combinator+-- indents these+-- words !+-- @+--+-- The @hang@ combinator is implemented as:+--+-- > hang i x = align (nest i x)+hang :: Indentation -> Doc -> Doc+hang i d = align (nest i d)++-- | The document @(align x)@ renders document @x@ with the nesting+-- level set to the current column. It is used for example to+-- implement 'hang'.+--+-- As an example, we will put a document right above another one,+-- regardless of the current nesting level:+--+-- > x $$ y = align (x <$$$> y)+--+-- > test = text "hi" <+> (text "nice" $$ text "world")+--+-- which will be layed out as:+--+-- @+-- hi nice+-- world+-- @+align :: Doc -> Doc+align d = column (\k ->+ nesting (\i -> nest (k - i) d)) --nesting might be negative :-)+++-- | The @line@ document advances to the next line and indents to the+-- current nesting level. Document @line@ behaves like @(text \" \")@+-- if the line break is undone by 'group'.+line :: Doc+line = Line False++-- | The @linebreak@ document advances to the next line and indents to+-- the current nesting level. Document @linebreak@ behaves like+-- 'empty' if the line break is undone by 'group'.+linebreak :: Doc+linebreak = Line True++-- | The document @(nest i x)@ renders document @x@ with the current+-- indentation level increased by i (See also 'hang', 'align' and+-- 'indent').+--+-- > nest 2 (text "hello" <$$$> text "world") <$$$> text "!"+--+-- outputs as:+--+-- @+-- hello+-- world+-- !+-- @+nest :: Indentation -> Doc -> Doc+nest i x = Nest i x++column, nesting :: (Indentation -> Doc) -> Doc+column f = Column f+nesting f = Nesting f
+ Text/PrettyPrint/Compact/Core.hs view
@@ -0,0 +1,142 @@+{-# LANGUAGE RecordWildCards #-}+module Text.PrettyPrint.Compact.Core(Doc(..),render,group,flatten,space,spacing,text) where++import Data.Monoid+import Data.Function (on)+import Data.List (partition,minimumBy,sort)+import Data.Either (partitionEithers)+import Data.String++type Indentation = Int++data Box = Str String | Spacing Indentation | NewLine {-^ not allowed in the input -}++instance IsString Doc where+ fromString = text++data Doc = Empty+ | Text Box+ | Line !Bool -- True <=> when undone by group, do not insert a space+ | Cat Doc Doc+ | Nest Indentation Doc+ | Union Doc Doc -- invariant: first lines of first doc longer than the first lines of the second doc+ | Column (Indentation -> Doc)+ | Nesting (Indentation -> Doc)+++instance Monoid Doc where+ mempty = Empty+ mappend = Cat++text :: String -> Doc+text = Text . Str++spacing = Text . Spacing++space = spacing 1++group :: Doc -> Doc+group x = Union (flatten x) x++flatten :: Doc -> Doc+flatten (Cat x y) = Cat (flatten x) (flatten y)+flatten (Nest i x) = Nest i (flatten x)+flatten (Line noSpace) = if noSpace then Empty else space+flatten (Union x _y) = flatten x+flatten (Column f) = Column (flatten . f)+flatten (Nesting f) = Nesting (flatten . f)+flatten other = other --Empty,Char,Text++len :: Box -> Int+len (Str s) = length s+len (Spacing x) = x+len NewLine = 0++data Docs = Nil+ | Cons !Indentation Doc Docs++data Process = Process {overflow :: Indentation+ ,curIndent :: !Indentation -- current indentation+ ,numToks :: Int -- total number of non-space tokens produced+ ,tokens :: [Box] -- tokens produced, in reverse order+ ,rest :: !Docs -- rest of the input document to process+ }+-- The ⟨filtering⟩ step takes all process states starting at the current+-- line, and discards those that are dominated. A process state+-- dominates another one if it was able to produce more tokens while+-- having less indentation. This is implemented by first sorting the+-- process states by following 'measure', and then applying the+-- 'filtering' function.++measure :: Process -> (Indentation, Int)+measure Process{..} = (curIndent, negate numToks)++instance Eq Process where+ (==) = (==) `on` measure+instance Ord Process where+ compare = compare `on` measure++filtering :: [Process] -> [Process]+filtering (x:y:xs) | numToks x >= numToks y = filtering (x:xs)+ | otherwise = x:filtering (y:xs)+filtering xs = xs++renderAll :: Double -> Indentation -> Doc -> [Box]+renderAll rfrac w doc = reverse $ loop [Process 0 0 0 [] $ Cons 0 doc Nil]+ where+ loop ps = case dones of+ ((_,done):_) -> done -- here we could attempt to do a better choice. Seems to be fine for now.+ [] -> case conts of+ (_:_) -> loop $ filtering $ sort $ conts -- See the comment ⟨filtering⟩ above+ [] -> case conts'over of+ (_:_) -> loop [minimumBy (compare `on` overflow) conts'over]+ [] -> case dones'over of+ ((_,done):_) -> done+ [] -> [Str "Pretty print: Panic"]++ where+ -- advance all processes by one line (if possible)+ ps' = concatMap (\Process{..} -> rall numToks tokens curIndent curIndent rest) ps+ -- Have some processes reached the end? With some overflow?+ (dones0,conts0) = partitionEithers ps'+ (conts,conts'over) = partition (\p -> overflow p <= 0) conts0+ (dones,dones'over) = partition (\(o,_) -> o <= 0) dones0++ -- r :: the ribbon width in characters+ r = max 0 (min w (round (fromIntegral w * rfrac)))++ -- Automatically inserted spacing does not count as doing more production.+ count (Spacing _) = 0+ count (Str _) = 1++ -- Compute the state(s) after reaching the end of line.+ -- rall :: n = indentation of current line+ -- k = current column+ -- (ie. (k >= n) && (k - n == count of inserted characters)+ rall :: Int -> [Box] -> Indentation -> Indentation -> Docs -> [Either (Indentation,[Box]) Process]+ rall nts ts n k ds0 = case ds0 of+ Nil -> [Left $ (overflow,ts)] -- Done!+ Cons i d ds -> case d of+ Empty -> rall nts ts n k ds+ Text s -> let k' = k+len s in seq k' (rall (nts+count s) (s:ts) n k' ds)+ Line _ -> [Right $ Process overflow i nts (Spacing i:NewLine:ts) ds] -- "yield" when the end of line is reached+ Cat x y -> rall nts ts n k (Cons i x (Cons i y ds))+ Nest j x -> let i' = i+j in seq i' (rall nts ts n k (Cons i' x ds))+ Union x y -> rall nts ts n k (Cons i x ds) ++ rall nts ts n k (Cons i y ds)+ Column f -> rall nts ts n k (Cons i (f k) ds)+ Nesting f -> rall nts ts n k (Cons i (f i) ds)+ where overflow = negate $ min (w - k) (r - k + n)+++layout :: [Box] -> String+layout [] = []+layout (Str s:xs) = s ++ layout xs+layout (NewLine:xs) = '\n' : layout xs+layout (Spacing x:xs) = replicate x ' ' ++ layout xs++render :: Double -> Indentation -> Doc -> String+render rfrac w d = do+ layout $ renderAll rfrac w d++instance Show Doc where+ show = render 0.8 80
+ pretty-compact.cabal view
@@ -0,0 +1,29 @@+name: pretty-compact+version: 1.0+synopsis: Pretty-printing library+description:+ This package contains a pretty-printing library, a set of API's+ that provides a way to easily print out text in a consistent+ format of your choosing. This is useful for compilers and related+ tools.+ .+ This library produces more compact outputs than both+ Wadler-Leijen or Hughes-PJ algorithms, at the expense of computational ressources.+ The API is the same as Wadler-Leijen's.+license: GPL+license-file: LICENSE+category: Text+maintainer: Jean-Philippe Bernardy <jeanphilippe.bernardy@gmail.com>+build-type: Simple+Cabal-Version: >= 1.8++source-repository head+ type: git+ location: http://github.com/jyp/prettiest.git++Library+ exposed-modules:+ Text.PrettyPrint.Compact+ Text.PrettyPrint.Compact.Core+ build-depends:+ base >= 3 && < 5