Language.Haskell.TH.PprLib

Contents

Description

Monadic front-end to Text.PrettyPrint.HughesPJ

Synopsis

The document type

Instances

Monad PprM
Show Doc

Primitive Documents

empty :: Doc Source

An empty document

semi :: Doc Source

A ';' character

comma :: Doc Source

A ',' character

colon :: Doc Source

A : character

space :: Doc Source

A space character

equals :: Doc Source

A '=' character

lparen :: Doc Source

A '(' character

rparen :: Doc Source

A ')' character

lbrack :: Doc Source

A '[' character

rbrack :: Doc Source

A ']' character

lbrace :: Doc Source

A '{' character

rbrace :: Doc Source

A '}' character

Converting values into documents

text :: String -> Doc Source

char :: Char -> Doc Source

ptext :: String -> Doc Source

int :: Int -> Doc Source

integer :: Integer -> Doc Source

float :: Float -> Doc Source

double :: Double -> Doc Source

rational :: Rational -> Doc Source

Wrapping documents in delimiters

parens :: Doc -> Doc Source

Wrap document in (...)

brackets :: Doc -> Doc Source

Wrap document in [...]

braces :: Doc -> Doc Source

Wrap document in {...}

quotes :: Doc -> Doc Source

Wrap document in '...'

doubleQuotes :: Doc -> Doc Source

Wrap document in "..."

Combining documents

(<>) :: Doc -> Doc -> Doc Source

Beside

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

Beside, separated by space

hcat :: [Doc] -> Doc Source

List version of <>

hsep :: [Doc] -> Doc Source

List version of <+>

($$) :: Doc -> Doc -> Doc Source

Above; if there is no overlap it "dovetails" the two

($+$) :: Doc -> Doc -> Doc Source

Above, without dovetailing.

vcat :: [Doc] -> Doc Source

List version of $$

sep :: [Doc] -> Doc Source

Either hsep or vcat

cat :: [Doc] -> Doc Source

Either hcat or vcat

fsep :: [Doc] -> Doc Source

"Paragraph fill" version of sep

fcat :: [Doc] -> Doc Source

"Paragraph fill" version of cat

nest :: Int -> Doc -> Doc Source

Nested

hang :: Doc -> Int -> Doc -> Doc Source

hang d1 n d2 = sep [d1, nest n d2]

punctuate :: Doc -> [Doc] -> [Doc]Source

punctuate p [d1, ... dn] = [d1 <> p, d2 <> p, ... dn-1 <> p, dn]

Predicates on documents

isEmpty :: Doc -> PprM Bool Source

Returns True if the document is empty

to_HPJ_Doc :: Doc -> Doc Source

pprName :: Name -> Doc Source

pprName' :: NameIs -> Name -> Doc Source