Copyright | (c) Trevor Elliott <revor@galois.com> 2015 |
---|---|
License | BSD-style (see the file LICENSE) |
Maintainer | David Terei <code@davidterei.com> |
Stability | stable |
Portability | portable |
Safe Haskell | Safe |
Language | Haskell98 |
This module provides a version of pretty that allows for annotations to be attached to documents. Annotations are arbitrary pieces of metadata that can be attached to sub-documents.
This module should be used as opposed to the
HughesPJ
module. Both are equivalent though as
this module simply re-exports the other.
Synopsis
- data Doc a
- char :: Char -> Doc a
- text :: String -> Doc a
- ptext :: String -> Doc a
- sizedText :: Int -> String -> Doc a
- zeroWidthText :: String -> Doc a
- int :: Int -> Doc a
- integer :: Integer -> Doc a
- float :: Float -> Doc a
- double :: Double -> Doc a
- rational :: Rational -> Doc a
- semi :: Doc a
- comma :: Doc a
- colon :: Doc a
- space :: Doc a
- equals :: Doc a
- lparen :: Doc a
- rparen :: Doc a
- lbrack :: Doc a
- rbrack :: Doc a
- lbrace :: Doc a
- rbrace :: Doc a
- parens :: Doc a -> Doc a
- brackets :: Doc a -> Doc a
- braces :: Doc a -> Doc a
- quotes :: Doc a -> Doc a
- doubleQuotes :: Doc a -> Doc a
- empty :: Doc a
- (<>) :: Doc a -> Doc a -> Doc a
- (<+>) :: Doc a -> Doc a -> Doc a
- hcat :: [Doc a] -> Doc a
- hsep :: [Doc a] -> Doc a
- ($$) :: Doc a -> Doc a -> Doc a
- ($+$) :: Doc a -> Doc a -> Doc a
- vcat :: [Doc a] -> Doc a
- sep :: [Doc a] -> Doc a
- cat :: [Doc a] -> Doc a
- fsep :: [Doc a] -> Doc a
- fcat :: [Doc a] -> Doc a
- nest :: Int -> Doc a -> Doc a
- hang :: Doc a -> Int -> Doc a -> Doc a
- punctuate :: Doc a -> [Doc a] -> [Doc a]
- annotate :: a -> Doc a -> Doc a
- isEmpty :: Doc a -> Bool
- render :: Doc a -> String
- renderSpans :: Doc ann -> (String, [Span ann])
- data Span a = Span {
- spanStart :: !Int
- spanLength :: !Int
- spanAnnotation :: a
- data Style = Style {
- mode :: Mode
- lineLength :: Int
- ribbonsPerLine :: Float
- style :: Style
- renderStyle :: Style -> Doc a -> String
- fullRender :: Mode -> Int -> Float -> (TextDetails -> a -> a) -> a -> Doc b -> a
- fullRenderAnn :: Mode -> Int -> Float -> (AnnotDetails b -> a -> a) -> a -> Doc b -> a
- data Mode
- data TextDetails
The document type
The abstract type of documents. A Doc represents a set of layouts. A Doc with no occurrences of Union or NoDoc represents just one layout.
Instances
Constructing documents
Converting values into documents
sizedText :: Int -> String -> Doc a Source #
Some text with any width. (text s = sizedText (length s) s
)
zeroWidthText :: String -> Doc a Source #
Some text, but without any width. Use for non-printing text such as a HTML or Latex tags
Simple derived documents
Wrapping documents in delimiters
Combining documents
($$) :: Doc a -> Doc a -> Doc a infixl 5 Source #
Above, except that if the last line of the first argument stops at least one position before the first line of the second begins, these two lines are overlapped. For example:
text "hi" $$ nest 5 (text "there")
lays out as
hi there
rather than
hi there
nest :: Int -> Doc a -> Doc a Source #
Nest (or indent) a document by a given number of positions
(which may also be negative). nest
satisfies the laws:
nest
0 x = xnest
k (nest
k' x) =nest
(k+k') xnest
k (x<>
y) =nest
k z<>
nest
k ynest
k (x$$
y) =nest
k x$$
nest
k ynest
kempty
=empty
x
, if<>
nest
k y = x<>
yx
non-empty
The side condition on the last law is needed because
empty
is a left identity for <>
.
punctuate :: Doc a -> [Doc a] -> [Doc a] Source #
punctuate p [d1, ... dn] = [d1 <> p, d2 <> p, ... dn-1 <> p, dn]
Annotating documents
Predicates on documents
Rendering documents
Default rendering
Annotation rendering
A Span
represents the result of an annotation after a Doc
has been
rendered, capturing where the annotation now starts and ends in the rendered
output.
Span | |
|
Rendering with a particular style
A rendering style. Allows us to specify constraints to choose among the many different rendering options.
Style | |
|
Instances
Eq Style # | |
Show Style # | |
Generic Style # | |
type Rep Style # | |
Defined in Text.PrettyPrint.Annotated.HughesPJ type Rep Style = D1 ('MetaData "Style" "Text.PrettyPrint.Annotated.HughesPJ" "pretty-1.1.3.6" 'False) (C1 ('MetaCons "Style" 'PrefixI 'True) (S1 ('MetaSel ('Just "mode") 'NoSourceUnpackedness 'NoSourceStrictness 'DecidedLazy) (Rec0 Mode) :*: (S1 ('MetaSel ('Just "lineLength") 'NoSourceUnpackedness 'NoSourceStrictness 'DecidedLazy) (Rec0 Int) :*: S1 ('MetaSel ('Just "ribbonsPerLine") 'NoSourceUnpackedness 'NoSourceStrictness 'DecidedLazy) (Rec0 Float)))) |
General rendering
:: Mode | Rendering mode. |
-> Int | Line length. |
-> Float | Ribbons per line. |
-> (TextDetails -> a -> a) | What to do with text. |
-> a | What to do at the end. |
-> Doc b | The document. |
-> a | Result. |
The general rendering interface. Please refer to the Style
and Mode
types for a description of rendering mode, line length and ribbons.
:: Mode | Rendering mode. |
-> Int | Line length. |
-> Float | Ribbons per line. |
-> (AnnotDetails b -> a -> a) | What to do with text. |
-> a | What to do at the end. |
-> Doc b | The document. |
-> a | Result. |
The general rendering interface, supporting annotations. Please refer to
the Style
and Mode
types for a description of rendering mode, line
length and ribbons.
Rendering mode.
PageMode | Normal rendering ( |
ZigZagMode | With zig-zag cuts. |
LeftMode | No indentation, infinitely long lines ( |
OneLineMode | All on one line, |
Instances
Eq Mode # | |
Show Mode # | |
Generic Mode # | |
type Rep Mode # | |
Defined in Text.PrettyPrint.Annotated.HughesPJ type Rep Mode = D1 ('MetaData "Mode" "Text.PrettyPrint.Annotated.HughesPJ" "pretty-1.1.3.6" 'False) ((C1 ('MetaCons "PageMode" 'PrefixI 'False) (U1 :: Type -> Type) :+: C1 ('MetaCons "ZigZagMode" 'PrefixI 'False) (U1 :: Type -> Type)) :+: (C1 ('MetaCons "LeftMode" 'PrefixI 'False) (U1 :: Type -> Type) :+: C1 ('MetaCons "OneLineMode" 'PrefixI 'False) (U1 :: Type -> Type))) |
data TextDetails Source #
A TextDetails represents a fragment of text that will be output at some
point in a Doc
.
Chr !Char | A single Char fragment |
Str String | A whole String fragment |
PStr String | Used to represent a Fast String fragment but now deprecated and identical to the Str constructor. |