Portability	portable
Stability	stable
Maintainer	Niklas Broberg, d00nibro@chalmers.se

Language.Haskell.Exts.Pretty

Contents

Pretty printing
Pretty-printing styles (from Text.PrettyPrint.HughesPJ)
Haskell formatting modes

Description

Pretty printer for Haskell with extensions.

Synopsis

Pretty printing

class Pretty a Source

Things that can be pretty-printed, including all the syntactic objects in Language.Haskell.Exts.Syntax and Language.Haskell.Exts.Annotated.Syntax.

Instances

Pretty SrcSpan
Pretty SrcLoc
Pretty Tool
Pretty GuardedAlt
Pretty GuardedAlts
Pretty Alt
Pretty FieldUpdate
Pretty QualStmt
Pretty Stmt
Pretty PatField
Pretty RPat
Pretty RPatOp
Pretty PXAttr
Pretty Pat
Pretty RuleVar
Pretty Rule
Pretty Activation
Pretty ModulePragma
Pretty CallConv
Pretty Safety
Pretty Splice
Pretty Bracket
Pretty XAttr
Pretty XName
Pretty Exp
Pretty Literal
Pretty Asst
Pretty FunDep
Pretty Kind
Pretty TyVarBind
Pretty Type
Pretty GuardedRhs
Pretty Rhs
Pretty BangType
Pretty InstDecl
Pretty ClassDecl
Pretty GadtDecl
Pretty ConDecl
Pretty QualConDecl
Pretty Match
Pretty IPBind
Pretty DataOrNew
Pretty Annotation
Pretty Decl
Pretty Assoc
Pretty ImportSpec
Pretty ImportDecl
Pretty ExportSpec
Pretty Module
Pretty CName
Pretty Op
Pretty QOp
Pretty IPName
Pretty Name
Pretty QName
Pretty SpecialCon
Pretty ModuleName
SrcInfo loc => Pretty (GuardedAlt loc)
SrcInfo loc => Pretty (GuardedAlts loc)
SrcInfo loc => Pretty (Alt loc)
SrcInfo loc => Pretty (FieldUpdate loc)
SrcInfo loc => Pretty (QualStmt loc)
SrcInfo loc => Pretty (Stmt loc)
SrcInfo loc => Pretty (PatField loc)
SrcInfo loc => Pretty (RPat loc)
Pretty (RPatOp l)
SrcInfo loc => Pretty (PXAttr loc)
SrcInfo loc => Pretty (Pat loc)
Pretty (WarningText l)
Pretty (RuleVar l)
SrcInfo loc => Pretty (Rule loc)
Pretty (Activation l)
SrcInfo loc => Pretty (ModulePragma loc)
Pretty (CallConv l)
Pretty (Safety l)
SrcInfo loc => Pretty (Splice loc)
SrcInfo loc => Pretty (Bracket loc)
SrcInfo loc => Pretty (XAttr loc)
Pretty (XName l)
SrcInfo loc => Pretty (Exp loc)
Pretty (Literal l)
Pretty (Asst l)
Pretty (Context l)
Pretty (FunDep l)
Pretty (Kind l)
Pretty (TyVarBind l)
Pretty (Type l)
SrcInfo loc => Pretty (GuardedRhs loc)
SrcInfo loc => Pretty (Rhs loc)
Pretty (BangType l)
SrcInfo loc => Pretty (InstDecl loc)
SrcInfo loc => Pretty (ClassDecl loc)
Pretty (GadtDecl l)
Pretty (FieldDecl l)
Pretty (ConDecl l)
Pretty (QualConDecl l)
SrcInfo pos => Pretty (Match pos)
SrcInfo loc => Pretty (IPBind loc)
Pretty (Deriving l)
Pretty (InstHead l)
Pretty (DeclHead l)
Pretty (DataOrNew l)
SrcInfo loc => Pretty (Annotation loc)
SrcInfo pos => Pretty (Decl pos)
Pretty (Assoc l)
Pretty (ImportSpec l)
Pretty (ImportSpecList l)
SrcInfo pos => Pretty (ImportDecl pos)
Pretty (ExportSpec l)
Pretty (ExportSpecList l)
Pretty (ModuleHead l)
SrcInfo pos => Pretty (Module pos)
Pretty (CName l)
Pretty (Op l)
Pretty (QOp l)
Pretty (IPName l)
Pretty (Name l)
Pretty (QName l)
Pretty (ModuleName l)
SrcInfo loc => Pretty (PAsst loc)
SrcInfo loc => Pretty (PType loc)
SrcInfo loc => Pretty (PContext loc)
SrcInfo loc => Pretty (ParseXAttr loc)
SrcInfo loc => Pretty (PFieldUpdate loc)
SrcInfo loc => Pretty (PExp loc)

prettyPrintStyleMode :: Pretty a => Style -> PPHsMode -> a -> String Source

pretty-print with a given style and mode.

prettyPrintWithMode :: Pretty a => PPHsMode -> a -> String Source

pretty-print with the default style and a given mode.

prettyPrint :: Pretty a => a -> String Source

pretty-print with the default style and defaultMode.

Pretty-printing styles (from Text.PrettyPrint.HughesPJ)

data Style

A rendering style.

Constructors

Style
Fields mode :: Mode The rendering mode lineLength :: Int Length of line, in chars ribbonsPerLine :: Float Ratio of ribbon length to line length

style :: Style

The default style (mode=PageMode, lineLength=100, ribbonsPerLine=1.5).

data Mode

Rendering mode.

Constructors

PageMode	Normal
ZigZagMode	With zig-zag cuts
LeftMode	No indentation, infinitely long lines
OneLineMode	All on one line

Haskell formatting modes

data PPHsMode Source

Pretty-printing parameters.

Note: the onsideIndent must be positive and less than all other indents.

Constructors

PPHsMode

Fields

classIndent :: Indent: indentation of a class or instance
doIndent :: Indent: indentation of a do-expression
caseIndent :: Indent: indentation of the body of a case expression
letIndent :: Indent: indentation of the declarations in a let expression
whereIndent :: Indent: indentation of the declarations in a where clause
onsideIndent :: Indent: indentation added for continuation lines that would otherwise be offside
spacing :: Bool: blank lines between statements?
layout :: PPLayout: Pretty-printing style to use
linePragmas :: Bool: add GHC-style LINE pragmas to output?

type Indent = Int Source

data PPLayout Source

Varieties of layout we can use.

Constructors

PPOffsideRule	classical layout
PPSemiColon	classical layout made explicit
PPInLine	inline decls, with newlines between them
PPNoLayout	everything on a single line

Instances

Eq PPLayout

defaultMode :: PPHsMode Source

The default mode: pretty-print using the offside rule and sensible defaults.