{- |

Module : $Header$

Copyright : (c) Christian Maeder and Uni Bremen 2003

Licence : similar to LGPL, see HetCATS/LICENCE.txt or LIZENZ.txt

Maintainer : maeder@tzi.de

Stability : experimental

Portability : portable

printing data types of the abstract syntax

-}

module HasCASL.PrintAs where

import HasCASL.As

import Common.Keywords

import HasCASL.HToken

import Common.Lib.Pretty

import Common.Id

import Common.PPUtils

import Common.PrettyPrint

import Common.GlobalAnnotations(GlobalAnnos)

import Common.AS_Annotation(mapAnM)

-- | short cut for: if b then empty else d

noPrint :: Bool -> Doc -> Doc

noPrint b d = if b then empty else d

instance PrettyPrint Variance where

printText0 _ v = text $ show v

instance PrettyPrint Kind where

printText0 ga knd = case knd of

Intersection [] _ -> text "Type"

MissingKind -> space

ClassKind ci _ -> printText0 ga ci

Downset mt t _ _ ->

let tok = case mt of

Nothing -> text "_"

Just x -> text (tokStr x) <+> text dotS <+> text (tokStr x)

in braces (tok <+>

text lessS <+> printText0 ga t)

Intersection ks _ -> printList0 ga ks

FunKind k1 k2 _ ->

(case k1 of

FunKind _ _ _ -> parens

_ -> id) (printText0 ga k1)

<+> text funS

<+> printText0 ga k2

ExtKind k v _ -> (case k of

FunKind _ _ _ -> parens

_ -> id) (printText0 ga k) <> printText0 ga v

instance PrettyPrint TypePattern where

printText0 ga tp = case tp of

TypePattern name args _ -> printText0 ga name

<> fcat (map (parens . printText0 ga) args)

TypePatternToken t -> printText0 ga t

MixfixTypePattern ts -> fsep (map (printText0 ga) ts)

BracketTypePattern k l _ -> bracket k $ commaT_text ga l

TypePatternArg t _ -> parens $ printText0 ga t

-- | put proper brackets around a document

bracket :: BracketKind -> Doc -> Doc

bracket b t = let (o,c) = getBrackets b in text o <> t <> text c

-- | print a 'Kind' plus a preceding colon (or nothing for 'star')

printKind :: GlobalAnnos -> Kind -> Doc

printKind ga kind = case kind of

Intersection [] _ -> empty

Downset Nothing t _ _ ->

space <> text lessS <+> printText0 ga t

_ -> space <> colon <+> printText0 ga kind

instance PrettyPrint Type where

printText0 ga ty = case ty of

TypeName name _k i -> printText0 ga name <>

if i == 0 then empty else text ("_v"++ show i)

TypeAppl t1 t2 -> case t1 of

TypeName (Id [a, Token "__" _, b] [] []) _ _ ->

printText0 ga a <> printText0 ga t2 <> printText0 ga b

TypeAppl (TypeName (Id [Token "__" _, inTok, Token "__" _]

[] []) _ _) t0 -> printText0 ga t0

<+> printText0 ga inTok <+> printText0 ga t2

_ -> (case t1 of

TypeName _ _ _ -> id

TypeToken _ -> id

BracketType _ _ _ -> id

TypeAppl _ _ -> id

_ -> parens) (printText0 ga t1) <+>

(case t2 of

TypeName _ _ _ -> id

TypeToken _ -> id

BracketType _ _ _ -> id

_ -> parens) (printText0 ga t2)

ExpandedType t1 t2 -> printText0 ga t1 <> (case t2 of

ProductType [] _ -> empty

_ -> text asP <> parens (printText0 ga t2))

TypeToken t -> printText0 ga t

BracketType k l _ -> bracket k $ commaT_text ga l

KindedType t kind _ -> (case t of

FunType _ _ _ _ -> parens

ProductType [] _ -> id

ProductType _ _ -> parens

LazyType _ _ -> parens

TypeAppl _ _ -> parens

_ -> id) (printText0 ga t)

<+> colon <+> printText0 ga kind

MixfixType ts -> fsep (map (printText0 ga) ts)

LazyType t _ -> text quMark <+> (case t of

FunType _ _ _ _ -> parens

ProductType [] _ -> id

ProductType _ _ -> parens

KindedType _ _ _ -> parens

_ -> id) (printText0 ga t)

ProductType ts _ -> if null ts then text "Unit"

-- parens empty

else fsep (punctuate (space <> char '*')

(map ( \ t ->

(case t of

FunType _ _ _ _ -> parens

ProductType [] _ -> id

ProductType _ _ -> parens

_ -> id) $ printText0 ga t) ts))

FunType t1 arr t2 _ -> (case t1 of

FunType _ _ _ _ -> parens

_ -> id) (printText0 ga t1)

<+> printText0 ga arr

<+> printText0 ga t2

-- no curried notation for bound variables

instance PrettyPrint TypeScheme where

printText0 ga (TypeScheme vs t _) = let tdoc = printText0 ga t in

if null vs then tdoc else

hang (text forallS <+> semiT_text ga vs <+> text dotS) 2 tdoc

instance PrettyPrint Instance where

printText0 _ i = case i of

Instance -> space <> text instanceS

Plain -> empty

instance PrettyPrint Partiality where

printText0 _ p = case p of

Partial -> text quMark

Total -> empty

instance PrettyPrint Arrow where

printText0 _ a = text $ show a

instance PrettyPrint Quantifier where

printText0 _ q = text $ show q

instance PrettyPrint TypeQual where

printText0 _ q = text $ show q

instance PrettyPrint Term where

printText0 ga t = printTerm ga

(case t of

QualVar _ -> True

QualOp _ _ _ _ -> True

_ -> False) t

unPredType :: Type -> Type

unPredType t = case t of

FunType ty PFunArr (TypeName

(Id [Token "Unit" _] [] _)

(Intersection [] _) 0) _ -> ty

_ -> t

unPredTypeScheme :: TypeScheme -> TypeScheme

unPredTypeScheme = mapTypeOfScheme unPredType

printTerm :: GlobalAnnos -> Bool -> Term -> Doc

printTerm ga b trm =

let ppParen = if b then parens else id

commaT = fsep . punctuate comma . map (printTerm ga False)

printApplTerm t = printTerm ga (case t of

ApplTerm _ _ _ -> False

TermToken _ -> False

ResolvedMixTerm _ _ _ -> False

_ -> True) t

in

(case trm of

TupleTerm _ _ -> id

BracketTerm _ _ _ -> id

TermToken _ -> id

MixTypeTerm _ _ _ -> id

_ -> ppParen)

$ case trm of

QualVar vd -> text varS <+> printText0 ga vd

QualOp br n t _ -> sep [printText0 ga br <+> printText0 ga n,

colon <+> printText0 ga

(if isPred br then unPredTypeScheme t else t)]

ResolvedMixTerm n ts _ ->

case ts of

[] -> printText0 ga n

[t] -> printText0 ga n <> printTerm ga True t

_ -> printText0 ga n <> parens (commaT ts)

ApplTerm t1 t2 _ ->

cat [printApplTerm t1, nest 2 $ printTerm ga True t2]

TupleTerm ts _ -> parens (commaT ts)

TypedTerm t q typ _ -> hang (printApplTerm t <+> printText0 ga q)

4 $ printText0 ga typ

QuantifiedTerm q vs t _ -> hang (printText0 ga q <+> semiT_text ga vs)

2 (text dotS <+> printText0 ga t)

LambdaTerm ps q t _ -> hang (text lamS <+> (case ps of

[p] -> printText0 ga p

_ -> fcat $ map (parens . printTerm ga False) ps))

2 ((case q of

Partial -> text dotS

Total -> text $ dotS ++ exMark) <+> printText0 ga t)

CaseTerm t es _ -> hang (text caseS <+> printText0 ga t <+> text ofS)

4 $ vcat (punctuate (text " | ") $ map (printEq0 ga funS) es)

LetTerm br es t _ ->

let dt = printText0 ga t

des = vcat $ punctuate semi $ map (printEq0 ga equalS) es

in case br of

Let -> sep [text letS <+> des, text inS <+> dt]

Where -> hang (sep [dt, text whereS]) 6 des

Program -> text programS <+> des

TermToken t -> printText0 ga t

MixTypeTerm q t _ -> printText0 ga q <+> printText0 ga t

MixfixTerm ts -> fsep $ map (printText0 ga) ts

BracketTerm k l _ -> bracket k $ commaT l

AsPattern v p _ -> printText0 ga v <+> text asP <+> printText0 ga p

-- | print an equation with different symbols between 'Pattern' and 'Term'

printEq0 :: GlobalAnnos -> String -> ProgEq -> Doc

printEq0 ga s (ProgEq p t _) =

hang (hang (printText0 ga p) 2 $ text s) 4 $ printText0 ga t

instance PrettyPrint VarDecl where

printText0 ga (VarDecl v t _ _) = printText0 ga v <>

case t of

MixfixType [] -> empty

_ -> space <> colon <+> printText0 ga t

instance PrettyPrint GenVarDecl where

printText0 ga gvd = case gvd of

GenVarDecl v -> printText0 ga v

GenTypeVarDecl tv -> printText0 ga tv

instance PrettyPrint TypeArg where

printText0 ga (TypeArg v c _ _) =

printText0 ga v <+> colon <+> printText0 ga c

-- | don't print an empty list and put parens around longer lists

printList0 :: (PrettyPrint a) => GlobalAnnos -> [a] -> Doc

printList0 ga l = case l of

[] -> empty

[x] -> printText0 ga x

_ -> parens $ commaT_text ga l

instance PrettyPrint InstOpId where

printText0 ga (InstOpId n l _) = printText0 ga n <> noPrint (null l)

(brackets $ semiT_text ga l)

------------------------------------------------------------------------

-- item stuff

------------------------------------------------------------------------

-- | print a 'TypeScheme' as a pseudo type

printPseudoType :: GlobalAnnos -> TypeScheme -> Doc

printPseudoType ga (TypeScheme l t _) = noPrint (null l) (text lamS

<+> (if null $ tail l then printText0 ga $ head l

else fcat(map (parens . printText0 ga) l))

<+> text dotS <> space) <> printText0 ga t

instance PrettyPrint BasicSpec where

printText0 ga (BasicSpec l) = vcat (map (printText0 ga) l)

instance PrettyPrint ProgEq where

printText0 ga = printEq0 ga equalS

instance PrettyPrint BasicItem where

printText0 ga bi = case bi of

SigItems s -> printText0 ga s

ProgItems l _ -> noPrint (null l) $ text programS <+> semiT_text ga l

ClassItems i l _ -> noPrint (null l) $ text classS <> printText0 ga i

<+> semiT_text ga l

GenVarItems l _ -> noPrint (null l) $ text varS <+> semiT_text ga l

FreeDatatype l _ -> noPrint (null l) $ text freeS <+> text typeS

<+> semiT_text ga l

GenItems l _ -> noPrint (null l) $ text generatedS

<+> braces (semiT_text ga l)

AxiomItems vs fs _ -> (noPrint (null vs) $ text forallS

<+> semiT_text ga vs)

$$ vcat (map ( \ x -> text dotS

<+> printText0 ga x) fs)

Internal l _ -> noPrint (null l) $ text internalS

<+> braces (semiT_text ga l)

instance PrettyPrint OpBrand where

printText0 _ b = text $ show b

instance PrettyPrint SigItems where

printText0 ga si = case si of

TypeItems i l _ -> noPrint (null l) $ text typeS <> printText0 ga i

<+> semiT_text ga l

OpItems b l _ -> noPrint (null l) $ printText0 ga b <+> semiT_text ga

(if isPred b then concat $

mapAnM ((:[]) . mapOpItem) l else l)

instance PrettyPrint ClassItem where

printText0 ga (ClassItem d l _) = printText0 ga d $$

if null l then empty

else braces (semiT_text ga l)

instance PrettyPrint ClassDecl where

printText0 ga (ClassDecl l k _) = commaT_text ga l

<+> text lessS <+> printText0 ga k

instance PrettyPrint Vars where

printText0 ga vd = case vd of

Var v -> printText0 ga v

VarTuple vs _ -> parens $ commaT_text ga vs

instance PrettyPrint TypeItem where

printText0 ga ti = case ti of

TypeDecl l k _ -> if null l then error "printText0 TypeDecl" else

commaT_text ga l <> printKind ga k

SubtypeDecl l t _ -> if null l then error "printText0 SubtypeDecl"

else commaT_text ga l <+> text lessS <+> printText0 ga t

IsoDecl l _ -> cat(punctuate (text " = ")

(map (printText0 ga) l))

SubtypeDefn p v t f _ -> printText0 ga p

<+> text equalS

<+> braces (printText0 ga v

<+> colon

<+> printText0 ga t

<+> text dotS

<+> printText0 ga f)

AliasType p k t _ -> (printText0 ga p <>

case k of

Nothing -> empty

Just j -> space <> colon <+>

printText0 ga j)

<+> text assignS

<+> printPseudoType ga t

Datatype t -> printText0 ga t

mapOpItem :: OpItem -> OpItem

mapOpItem oi = case oi of

OpDecl l t as ps -> OpDecl l (unPredTypeScheme t) as ps

OpDefn n ps s p t qs -> OpDefn n ps (unPredTypeScheme s) p t qs

instance PrettyPrint OpItem where

printText0 ga oi = case oi of

OpDecl l t attrs _ -> if null l then error "printText0 OpDecl" else

commaT_text ga l <+> colon <+> (printText0 ga t

<> (if null attrs then empty else comma <> space)

<> commaT_text ga attrs)

OpDefn n ps s p t _ -> hang

(hang (printText0 ga n <> fcat (map (parens . semiT_text ga) ps))

2 (colon <> printText0 ga p

<+> printText0 ga s))

2 (text equalS

<+> printText0 ga t)

instance PrettyPrint BinOpAttr where

printText0 _ a = text $ case a of

Assoc -> assocS

Comm -> commS

Idem -> idemS

instance PrettyPrint OpAttr where

printText0 ga oa = case oa of

BinOpAttr a _ -> printText0 ga a

UnitOpAttr t _ -> text unitS <+> printText0 ga t

instance PrettyPrint DatatypeDecl where

printText0 ga (DatatypeDecl p k alts d _) = (printText0 ga p <>

printKind ga k)

<+> text defnS

<+> vcat(punctuate (text " | ")

(map (printText0 ga) alts))

<+> case d of [] -> empty

_ -> text derivingS

<+> commaT_text ga d

instance PrettyPrint Alternative where

printText0 ga alt = case alt of

Constructor n cs p _ ->

printText0 ga n <+> fsep (map (parens . semiT_text ga) cs)

<> printText0 ga p

Subtype l _ -> noPrint (null l) $ text typeS <+> commaT_text ga l

instance PrettyPrint Component where

printText0 ga sel = case sel of

Selector n p t _ _ -> printText0 ga n

<+> colon <> printText0 ga p

<+> printText0 ga t

NoSelector t -> printText0 ga t

instance PrettyPrint OpId where

printText0 ga (OpId n ts _) = printText0 ga n

<+> noPrint (null ts)

(brackets $ commaT_text ga ts)

instance PrettyPrint Symb where

printText0 ga (Symb i mt _) =

printText0 ga i <> (case mt of Nothing -> empty

Just (SymbType t) ->

empty <+> colon <+>

printText0 ga t)

instance PrettyPrint SymbItems where

printText0 ga (SymbItems k syms _ _) =

printSK k <> commaT_text ga syms

instance PrettyPrint SymbOrMap where

printText0 ga (SymbOrMap s mt _) =

printText0 ga s <> (case mt of Nothing -> empty

Just t ->

empty <+> text mapsTo <+>

printText0 ga t)

instance PrettyPrint SymbMapItems where

printText0 ga (SymbMapItems k syms _ _) =

printSK k <> commaT_text ga syms

-- | print symbol kind

printSK :: SymbKind -> Doc

printSK k =

case k of Implicit -> empty

_ -> text (drop 3 $ show k) <> space