{- |

Module : $Header$

Copyright : (c) Klaus L�ttich, Christian Maeder and Uni Bremen 2002-2003

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

Maintainer : hets@tzi.de

Stability : experimental

Portability : portable

pretty printing data types of 'BASIC_SPEC'

-}

module CASL.Print_AS_Basic where

import Data.List (mapAccumL)

import Data.Char (isDigit)

import Common.Id

import CASL.AS_Basic_CASL

import Common.AS_Annotation

import Common.GlobalAnnotations

import CASL.LiteralFuns

import Common.Print_AS_Annotation

import Common.Keywords

import Common.Lib.Pretty

import Common.PrettyPrint

import Common.PPUtils

--import Debug.Trace

-- trace :: String -> a -> a

-- trace _ a = a

instance (PrettyPrint b, PrettyPrint s, PrettyPrint f) =>

PrettyPrint (BASIC_SPEC b s f) where

printText0 ga (Basic_spec l) =

if null l then braces empty else vcat (map (printText0 ga) l)

instance (PrettyPrint b, PrettyPrint s, PrettyPrint f) =>

PrettyPrint (BASIC_ITEMS b s f) where

printText0 ga (Sig_items s) = printText0 ga s

printText0 ga (Free_datatype l _) =

hang (ptext freeS <+> ptext typeS<>pluralS_doc l) 4 $

semiAnno_text ga l

printText0 ga (Sort_gen l _) =

hang (ptext generatedS <+> condTypeS) 4 $

condBraces (vcat (map (printText0 ga) l))

where condTypeS =

if isOnlyDatatype then ptext typeS<>pluralS_doc l

else empty

condBraces d =

if isOnlyDatatype then

case l of

[x] -> case x of

Annoted (Datatype_items l' _) _ lans _ ->

vcat (map (printText0 ga) lans)

$$ semiAnno_text ga l'

_ -> error "wrong implementation of isOnlyDatatype"

_ -> error "wrong implementation of isOnlyDatatype"

else braces d

isOnlyDatatype =

case l of

[x] -> case x of

Annoted (Datatype_items _ _) _ _ _ -> True

_ -> False

_ -> False

printText0 ga (Var_items l _) =

text varS<>pluralS_doc l <+> semiT_text ga l

printText0 ga (Local_var_axioms l f _) =

text forallS <+> semiT_text ga l

$$ printFormulaAux ga f

printText0 ga (Axiom_items f _) =

printFormulaAux ga f

printText0 ga (Ext_BASIC_ITEMS b) = printText0 ga b

printFormulaAux :: PrettyPrint f => GlobalAnnos -> [Annoted (FORMULA f)] -> Doc

printFormulaAux ga f =

vcat $ map (printAnnotedFormula_Text0 ga) f

printAnnotedFormula_Text0 :: PrettyPrint f =>

GlobalAnnos -> Annoted (FORMULA f) -> Doc

printAnnotedFormula_Text0 ga (Annoted i _ las ras) =

let i' = char '.' <+> printText0 ga i

las' = if not $ null las then

ptext "\n" <> printAnnotationList_Text0 ga las

else

empty

(la,ras') = splitAndPrintRAnnos printText0

printAnnotationList_Text0

(<+>)

(empty) ga ras

in las' $+$ (hang i' 0 la) $$ ras'

instance (PrettyPrint s, PrettyPrint f) =>

PrettyPrint (SIG_ITEMS s f) where

printText0 ga (Sort_items l _) =

text sortS<>pluralS_doc l <+> semiAnno_text ga l

printText0 ga (Op_items l _) =

text opS<>pluralS_doc l <+> semiAnno_text ga l

printText0 ga (Pred_items l _) =

text predS<>pluralS_doc l <+> semiAnno_text ga l

printText0 ga (Datatype_items l _) =

text typeS<>pluralS_doc l <+> semiAnno_text ga l

printText0 ga (Ext_SIG_ITEMS s) = printText0 ga s

instance PrettyPrint f =>

PrettyPrint (SORT_ITEM f) where

printText0 ga (Sort_decl l _) = commaT_text ga l

printText0 ga (Subsort_decl l t _) =

hang (commaT_text ga l) 4 $ text lessS <+> printText0 ga t

printText0 ga (Subsort_defn s v t f _) =

-- TODO: lannos of f should printed after the equal sign

printText0 ga s <+> ptext equalS <+>

braces (hang (printText0 ga v <+> colon <+> printText0 ga t)

4 (ptext "." <+> printText0 ga f))

printText0 ga (Iso_decl l _) =

fsep $ punctuate (space <>text equalS) $ map (printText0 ga) l

instance PrettyPrint f => PrettyPrint (OP_ITEM f) where

printText0 ga (Op_decl l t a _) =

hang (hang (commaT_text ga l)

4

(colon <> printText0 ga t <> condComma))

4 $

if na then empty

else commaT_text ga a

where na = null a

condComma = if na then empty

else comma

printText0 ga (Op_defn n h t _) = printText0 ga n

<> printText0 ga h

<+> text equalS

<+> printText0 ga t

instance PrettyPrint OP_TYPE where

printText0 ga (Total_op_type l s _) = (if null l then empty

else space

<> crossT_text ga l

<+> text funS)

<> space <> printText0 ga s

printText0 ga (Partial_op_type l s _) = (if null l then text quMark

else space

<> crossT_text ga l

<+> text (funS ++ quMark))

<+> printText0 ga s

instance PrettyPrint OP_HEAD where

printText0 ga (Total_op_head l s _) =

(if null l then empty

else parens(semiT_text ga l))

<> colon

<+> printText0 ga s

printText0 ga (Partial_op_head l s _) =

(if null l then empty

else parens(semiT_text ga l))

<> text (colonS ++ quMark)

<+> printText0 ga s

instance PrettyPrint ARG_DECL where

printText0 ga (Arg_decl l s _) = commaT_text ga l

<+> colon

<> printText0 ga s

instance PrettyPrint f => PrettyPrint (OP_ATTR f) where

printText0 _ (Assoc_op_attr) = text assocS

printText0 _ (Comm_op_attr) = text commS

printText0 _ (Idem_op_attr) = text idemS

printText0 ga (Unit_op_attr t) = text unitS <+> printText0 ga t

instance PrettyPrint f => PrettyPrint (PRED_ITEM f) where

printText0 ga (Pred_decl l t _) = commaT_text ga l

<+> colon <+> printText0 ga t

printText0 ga (Pred_defn n h f _) = printText0 ga n

<> printText0 ga h

<+> text equivS

<+> printText0 ga f

instance PrettyPrint PRED_TYPE where

printText0 _ (Pred_type [] _) = parens empty

printText0 ga (Pred_type l _) = crossT_text ga l

instance PrettyPrint PRED_HEAD where

printText0 ga (Pred_head l _) = parens (semiT_text ga l)

instance PrettyPrint DATATYPE_DECL where

printText0 ga (Datatype_decl s a _) =

printText0 ga s <+>

sep ((hang (text defnS) 4 (printText0 ga $ head a)):

(map (\x -> nest 2 $ ptext barS <+> nest 2 (printText0 ga x)) $

tail a))

instance PrettyPrint ALTERNATIVE where

printText0 ga (Total_construct n l _) = printText0 ga n

<> if null l then empty

else parens(semiT_text ga l)

printText0 ga (Partial_construct n l _) = printText0 ga n

<> parens(semiT_text ga l)

<> text quMark

printText0 ga (Subsorts l _) = text sortS <+> commaT_text ga l

instance PrettyPrint COMPONENTS where

printText0 ga (Total_select l s _) = commaT_text ga l

<> colon

<> printText0 ga s

printText0 ga (Partial_select l s _) = commaT_text ga l

<> text (colonS ++ quMark)

<> printText0 ga s

printText0 ga (Sort s) = printText0 ga s

instance PrettyPrint VAR_DECL where

printText0 ga (Var_decl l s _) = commaT_text ga l

<> colon

<> printText0 ga s

instance PrettyPrint f => PrettyPrint (FORMULA f) where

printText0 ga (Quantification q l f _) =

hang (printText0 ga q <+> semiT_text ga l) 4 $

char '.' <+> printText0 ga f

printText0 ga (Conjunction l _) =

sep $ prepPunctuate (ptext lAnd <> space) $

map (condParensXjunction printText0 parens ga) l

printText0 ga (Disjunction l _) =

sep $ prepPunctuate (ptext lOr <> space) $

map (condParensXjunction printText0 parens ga) l

printText0 ga i@(Implication f g b _) =

if b

then (

hang (condParensImplEquiv printText0 parens ga i f

<+> ptext implS) 4 $

condParensImplEquiv printText0 parens ga i g)

else (

hang (condParensImplEquiv printText0 parens ga i g

<+> ptext "if") 4 $

condParensImplEquiv printText0 parens ga i f)

printText0 ga e@(Equivalence f g _) =

hang (condParensImplEquiv printText0 parens ga e f

<+> ptext equivS) 4 $

condParensImplEquiv printText0 parens ga e g

printText0 ga (Negation f _) = ptext "not" <+> printText0 ga f

printText0 _ (True_atom _) = ptext trueS

printText0 _ (False_atom _) = ptext falseS

printText0 ga (Predication p l _) =

let (p_id,isQual) =

case p of

Pred_name i -> (i,False)

Qual_pred_name i _ _ -> (i,True)

p' = printText0 ga p

in if isQual then

print_prefix_appl_text ga p' l

else condPrint_Mixfix_text ga p_id l

printText0 ga (Definedness f _) = text defS <+> printText0 ga f

printText0 ga (Existl_equation f g _) =

hang (printText0 ga f <+> ptext exEqual) 4 $ printText0 ga g

printText0 ga (Strong_equation f g _) =

hang (printText0 ga f <+> ptext equalS) 4 $ printText0 ga g

printText0 ga (Membership f g _) =

printText0 ga f <+> ptext inS <+> printText0 ga g

printText0 ga (Mixfix_formula t) = printText0 ga t

printText0 _ (Unparsed_formula s _) = text s

printText0 ga (Sort_gen_ax constrs) =

text generatedS <>

braces (text sortS <+> commaT_text ga sorts

<> semi <+> semiT_text ga ops)

<+> (if null sortMap then empty

else text withS

<+> fsep (punctuate comma (map printSortMap sortMap)))

where (sorts,ops,sortMap) = recover_Sort_gen_ax constrs

printSortMap (s1,s2) =

printText0 ga s1 <+> ptext "|->" <+> printText0 ga s2

printText0 ga (ExtFORMULA f) = printText0 ga f

instance PrettyPrint QUANTIFIER where

printText0 _ (Universal) = ptext forallS

printText0 _ (Existential) = ptext existsS

printText0 _ (Unique_existential) = ptext (existsS ++ exMark)

instance PrettyPrint PRED_SYMB where

printText0 ga (Pred_name n) = printText0 ga n

printText0 ga (Qual_pred_name n t _) =

parens $ ptext predS <+> printText0 ga n <+> colon <+> printText0 ga t

instance PrettyPrint f => PrettyPrint (TERM f) where

printText0 ga (Simple_id i) = printText0 ga i

printText0 ga (Qual_var n t _) =

parens $ text varS <+> printText0 ga n <+> colon <+> printText0 ga t

printText0 ga (Application o l _) =

let (o_id,isQual) =

case o of

Op_name i -> (i,False)

Qual_op_name i _ _ -> (i,True)

o' = printText0 ga o

in if isQual then

print_prefix_appl_text ga (parens o') l

else

if isLiteral ga o_id l then

{-trace ("a literal application: "

++ show (Application o l [])) $ -}

print_Literal_text ga o_id l

else

condPrint_Mixfix_text ga o_id l

printText0 ga (Sorted_term t s _) =

printText0 ga t <+> colon <+> printText0 ga s

printText0 ga (Cast t s _) =

printText0 ga t <+> text asS <+> printText0 ga s

printText0 ga(Conditional u f v _) =

hang (printText0 ga u) 4 $

sep ((text whenS <+> printText0 ga f):

[text elseS <+> printText0 ga v])

printText0 _ (Unparsed_term s _) = text s

printText0 ga (Mixfix_qual_pred p) = printText0 ga p

printText0 ga (Mixfix_term l) =

cat(punctuate space (map (printText0 ga) l))

printText0 ga (Mixfix_token t) = printText0 ga t

printText0 ga (Mixfix_sorted_term s _) = colon

<> printText0 ga s

printText0 ga (Mixfix_cast s _) = text asS

<+> printText0 ga s

printText0 ga (Mixfix_parenthesized l _) = parens (commaT_text ga l)

printText0 ga (Mixfix_bracketed l _) = brackets (commaT_text ga l)

printText0 ga (Mixfix_braced l _) = braces (commaT_text ga l)

instance PrettyPrint OP_SYMB where

printText0 ga (Op_name o) = printText0 ga o

printText0 ga (Qual_op_name o t _) =

text opS <+> printText0 ga o <+> colon <> printText0 ga t

instance PrettyPrint SYMB_ITEMS where

printText0 ga (Symb_items k l _) =

printText0 ga k <> ptext (pluralS_symb_list k l)

<+> commaT_text ga l

instance PrettyPrint SYMB_ITEMS_LIST where

printText0 ga (Symb_items_list l _) = commaT_text ga l

instance PrettyPrint SYMB_MAP_ITEMS where

printText0 ga (Symb_map_items k l _) =

printText0 ga k <> ptext (pluralS_symb_list k l)

<+> commaT_text ga l

instance PrettyPrint SYMB_MAP_ITEMS_LIST where

printText0 ga (Symb_map_items_list l _) = commaT_text ga l

instance PrettyPrint SYMB_KIND where

printText0 _ Implicit = empty

printText0 _ Sorts_kind = ptext sortS

printText0 _ Ops_kind = ptext opS

printText0 _ Preds_kind = ptext predS

instance PrettyPrint SYMB where

printText0 ga (Symb_id i) = printText0 ga i

printText0 ga (Qual_id i t _) =

printText0 ga i <+> colon <+> printText0 ga t

instance PrettyPrint TYPE where

printText0 ga (O_type t) = printText0 ga t

printText0 ga (P_type t) = printText0 ga t

printText0 ga (A_type t) = printText0 ga t

instance PrettyPrint SYMB_OR_MAP where

printText0 ga (Symb s) = printText0 ga s

printText0 ga (Symb_map s t _) =

printText0 ga s <+> text mapsTo <+> printText0 ga t

---- helpers ----------------------------------------------------------------

pluralS_symb_list :: SYMB_KIND -> [a] -> String

pluralS_symb_list k l = case k of

Implicit -> ""

_ -> if length l > 1

then "s"

else ""

condPrint_Mixfix :: PrettyPrint f => (Token -> Doc)

-> (Id -> Doc)

-> (TERM f -> Doc)

-> (Doc -> Doc) -- ^ a function that surrounds

-- the given Doc with appropiate

-- parens

-> (Doc -> Doc -> Doc) -- ^ a beside with space

-- like <+> or <\+>

-> ([Doc] -> Doc) -- ^ a list concat with space and

-- fill the line policy like

-- fsep or fsep_latex

-> Doc -- comma doc

-> Maybe (Token -> Doc) -- ^ this function should be

-- given to print a Token in a

-- special way

-> (Maybe Display_format)

-> GlobalAnnos -> Id -> [TERM f] -> Doc

condPrint_Mixfix pTok pId pTrm parens_fun

beside_fun fsep_fun comma_doc mpt_fun mdf

ga i l =

if isMixfix i then

if length (filter isPlace tops) == length l then

print_mixfix_appl pTok pId pTrm parens_fun

beside_fun fsep_fun mpt_fun mdf ga i l

else

print_prefix_appl pTrm parens_fun fsep_fun comma_doc o' l

else print_prefix_appl pTrm parens_fun fsep_fun comma_doc o' l

where tops = case i of Id tp _ _ -> tp

o' = pId i

{- TODO: consider string-, number-, list- and floating-annotations -}

condPrint_Mixfix_text :: PrettyPrint f => GlobalAnnos -> Id -> [TERM f] -> Doc

condPrint_Mixfix_text ga =

condPrint_Mixfix (printText0 ga) (printText0 ga)

(printText0 ga) parens

(<+>) fsep comma Nothing Nothing ga

-- printing consitent mixfix application or predication

{- TODO: consider string-, number-, list- and floating-annotations -}

print_mixfix_appl :: PrettyPrint f => (Token -> Doc) -- ^ print a Token

-> (Id -> Doc) -- ^ print an Id

-> (TERM f -> Doc) -- ^ print TERM recursively

-> (Doc -> Doc) -- ^ a function that surrounds

-- the given Doc with appropiate

-- parens

-> (Doc -> Doc -> Doc) -- ^ a beside with space

-- like <+> or <\+>

-> ([Doc] -> Doc) -- ^ a list concat with space and

-- fill the line policy like

-- fsep or fsep_latex

-> Maybe (Token -> Doc) -- ^ this function should be

-- given to print a Token in a

-- special way if Nothing is given

-- pf is used

-> Maybe Display_format

-> GlobalAnnos -> Id -> [TERM f] -> Doc

print_mixfix_appl pTok pId pTrm parens_fun

beside_fun fsep_fun

mpt_fun mdf

ga oid terms =

d_terms_b_comp <> c `beside_fun` d_terms_a_comp

where (tops,cs) = maybe (case oid of Id x1 x2 _ -> (x1,x2))

(\x -> (x,[]))

md_tops

md_tops = maybe Nothing (\x -> lookupDisplay ga x oid) mdf

c = if null cs then text "" -- an empty String works for ASCII

-- and LaTeX ensuring a space after

-- the last token of the identifier

-- if the compound is empty

else pId (Id [] cs [])

(tps_b_comp,places) = splitMixToken tops

nr_places = length $ filter isPlace tps_b_comp

(terms_b_comp,terms_a_comp) = splitAt nr_places terms

d_terms_b_comp = fsep_fun (first_term

: fillIn tps_b_comp' terms_b_comp')

d_terms_a_comp = fsep_fun (fillIn places' terms_a_comp'

++ [last_term])

-- tps_b_comp' :: [Token]

-- terms_b_comp' :: PrettyPrint f => [TERM f]

-- first_term :: Doc

(tps_b_comp',terms_b_comp',first_term) =

if null tps_b_comp then -- invisible Id

([], terms_b_comp, empty)

else if (isPlace $ head tps_b_comp)

then

(tail tps_b_comp,

tail terms_b_comp,

condParensAppl pTrm parens_fun

ga oid (head terms_b_comp)

(Just ALeft))

else

(tps_b_comp,terms_b_comp,empty)

(places',terms_a_comp',last_term) =

if (not $ null places)

then

(init places,init terms_a_comp,

condParensAppl pTrm parens_fun

ga oid (last terms_a_comp)

(Just ARight))

else

(places,terms_a_comp,empty)

-- fillIn :: PrettyPrint f => [Token] -> [TERM f] -> [Doc]

fillIn tps ts = let (_,nl) = mapAccumL pr ts tps in nl

-- pr :: PrettyPrint f => [TERM f] -> Token -> ([TERM f],Doc)

pr [] top = ([], pf' top)

pr tS@(t:ts) top

| isPlace top = (ts, pTrm t)

| otherwise = (tS,pf' top)

pf' = maybe pTok (\ f -> maybe pTok (\ _ -> f) md_tops) mpt_fun

-- printing consistent prefix application and predication

print_prefix_appl :: PrettyPrint f => (TERM f -> Doc) -- ^ print TERM recursively

-> (Doc -> Doc) -- ^ a function that surrounds

-- the given Doc with appropiate

-- parens

-> ([Doc] -> Doc) -- ^ a list concat without space and

-- fill the line policy like

-- fsep or fsep_latex

-> Doc -- comma

-> Doc -> [TERM f] -> Doc

print_prefix_appl pTrm parens_fun fsep_fun comma_doc po' l = po' <>

(if null l then empty

else parens_fun $ fsep_fun $ punctuate comma_doc $ map pTrm l)

print_prefix_appl_text :: PrettyPrint f => GlobalAnnos -> Doc -> [TERM f] -> Doc

print_prefix_appl_text ga =

print_prefix_appl (printText0 ga) parens fsep comma

print_Literal :: PrettyPrint f => (Token -> Doc) -- ^ print a Token

-> (Id -> Doc) -- ^ print an Id

-> (TERM f -> Doc) -- ^ print TERM recursively

-> (Doc -> Doc) -- ^ a function that surrounds

-- the given Doc with appropiate

-- parens

-> (Doc -> Doc -> Doc) -- ^ a beside with space

-- like <+> or <\+>

-> ([Doc] -> Doc) -- ^ a list concat without space and

-- fill the line policy like

-- fsep or fsep_latex

-> Doc -- ^ a comma

-> Doc -- ^ a document containing the dot for a Fraction

-> Doc -- ^ a document containing the 'E' of a Floating

-> Maybe (Token -> Doc) -- ^ this function should be

-- given to print a Token in a

-- special way

-> (Maybe Display_format)

-> GlobalAnnos -> Id -> [TERM f] -> Doc

print_Literal pTok pId pTrm parens_fun

beside_fun fsep_fun comma_doc dot_doc e_doc mpt_fun mdf

ga li ts

| isSignedNumber ga li ts = let [t_ts] = ts

in pId li <>

((uncurry p_l) (splitAppl t_ts))

| isNumber ga li ts = pTok $ tokNumber li

| isFrac ga li ts = let [lt,rt] = ts

(lni,lnt) = splitAppl lt

(rni,rnt) = splitAppl rt

ln = p_l lni lnt

rn = p_l rni rnt

in ln <> dot_doc <> rn

| isFloat ga li ts = let [bas,ex] = ts

(bas_i,bas_t) = splitAppl bas

(ex_i,ex_t) = splitAppl ex

bas_d = p_l bas_i bas_t

ex_d = p_l ex_i ex_t

in bas_d <> e_doc <> ex_d

| isList ga li ts = let list_body = fsep_fun $ punctuate comma_doc

$ map pTrm $ listElements li

(openL, closeL, comps) = getListBrackets $

listBrackets li

in hcat(map pTok openL) <+> list_body

<+> hcat(map pTok closeL)

<> pId (Id [] comps [])

| isString ga li ts = ptext $

(\s -> let r = '"':(s ++ "\"") in seq r r) $

concatMap convCASLChar $ toksString li

| otherwise = condPrint_Mixfix pTok pId pTrm parens_fun

beside_fun fsep_fun comma_doc mpt_fun mdf

ga li ts

where p_l = print_Literal pTok pId pTrm parens_fun

beside_fun fsep_fun comma_doc dot_doc e_doc mpt_fun mdf

ga

tokNumber i = if tokIsDigit then

tok

else

{-trace ("Number: "++show ts) $ -}

mergeTok $ map (termToTok "number") $

collectElements (Nothing) i ts

where tok = case i of

Id [] _ _ -> error "malformed Id!!!"

Id (x:_) _ _ -> x

tokIsDigit = (isDigit $ head $ tokStr $ tok) && null ts

toksString i = case getLiteralType ga i of

StringNull -> []

StringCons n -> map (termToTok "string") $

collectElements (Just n) i ts

_ -> error "toksString"

termToTok tokType x = case basicTerm x of

Just tokk -> tokk

Nothing -> error ("malformed " ++ tokType)

listElements i = case getLiteralType ga i of

ListNull _ -> []

ListCons _ n -> collectElements (Just n) i ts

_ -> error "listElements"

listBrackets i = case getLiteralType ga i of

ListNull b -> b

ListCons b _ -> b

_ -> error "listBrackets"

mergeTok :: [Token] -> Token

mergeTok ts

| not (null ts) = foldr merge initTok ts

| otherwise = error "mergeTok: wrong call with empty list"

where initTok = Token {tokStr="",tokPos = tokPos (head ts)}

merge tok newTok = newTok {tokStr = tokStr tok ++ tokStr newTok}

print_Literal_text :: PrettyPrint f => GlobalAnnos -> Id -> [TERM f] -> Doc

print_Literal_text ga =

print_Literal (printText0 ga) (printText0 ga) (printText0 ga)

parens (<+>) fsep comma (char '.') (char 'E') Nothing Nothing ga

condParensAppl :: PrettyPrint f => (TERM f -> Doc)

-> (Doc -> Doc) -- ^ a function that surrounds

-- the given Doc with appropiate

-- parens

-> GlobalAnnos -> Id -> TERM f -> Maybe AssocEither -> Doc

condParensAppl pf parens_fun ga o_i t mdir =

case t of

Simple_id _ -> t'

Application _ [] _ -> t'

Application o it _

| isLiteral ga i_i it -> t'

-- ordinary appl (no place)

| isOrdAppl i_i -> t'

-- postfix appl

| isOrdAppl o_i && isPostfix i_i -> t'

-- prefix appl w/o parens

| isOrdAppl o_i && isPrefix i_i -> t'

-- both mixfix and in <> prec relation so parens

| isMixfix o_i && isMixfix i_i

&& explicitGrouping o_i i_i -> parens_fun t'

| isPostfix o_i && isPrefix i_i -> parens_fun t'

| isPrefix o_i && isPostfix i_i -> t'

| isPrefix o_i && isInfix i_i -> parens_fun t'

| isInfix o_i && isPrefix i_i -> t'

| isInfix o_i && isPostfix i_i -> t'

-- infix appl (left and right arg/place)

| (isInfix i_i && isSurround o_i)

|| (isInfix o_i && isSurround i_i) -> t'

| isInfix i_i && o_i == i_i ->

case mdir of

Nothing -> condParensPrec

Just ass | isAssoc ass amap o_i -> t'

| otherwise -> parens_fun t'

| otherwise -> condParensPrec

where i_i = case o of

Op_name i -> i

Qual_op_name i _ _ -> i

condParensPrec = case precRel (prec_annos ga) o_i i_i of

Lower -> t'

_ -> parens_fun t'

amap = assoc_annos ga

explicitGrouping :: Id -> Id -> Bool

explicitGrouping i1 i2 =

case precRel (prec_annos ga) i1 i2 of

BothDirections -> True

_ -> False

Sorted_term _ _ _ -> t'

Cast _ _ _ -> t'

_ -> parens_fun t'

where t' = pf t

condParensImplEquiv :: PrettyPrint f => (GlobalAnnos -> FORMULA f -> Doc)

-> (Doc -> Doc) -- ^ a function that surrounds

-- the given Doc with appropiate

-- parens

-> GlobalAnnos -> FORMULA f -> FORMULA f -> Doc

condParensImplEquiv pf parens_fun ga e_i f =

case e_i of

Implication _ _ _ _ -> case f of

Implication _ _ _ _ -> f'

Disjunction _ _ -> f'

Conjunction _ _ -> f'

Negation _ _ -> f'

True_atom _ -> f'

False_atom _ -> f'

Predication _ _ _ -> f'

Existl_equation _ _ _ -> f'

Definedness _ _ -> f'

Strong_equation _ _ _ -> f'

_ -> parens_fun f'

Equivalence _ _ _ -> case f of Disjunction _ _ -> f'

Conjunction _ _ -> f'

Negation _ _ -> f'

True_atom _ -> f'

False_atom _ -> f'

Predication _ _ _ -> f'

Quantification _ _ _ _ -> f'

Existl_equation _ _ _ -> f'

Strong_equation _ _ _ -> f'

Definedness _ _ -> f'

_ -> parens_fun f'

_ -> error "Wrong call: condParensImplEquiv"

where f' = pf ga f

condParensXjunction :: PrettyPrint f => (GlobalAnnos -> FORMULA f -> Doc)

-> (Doc -> Doc) -- ^ a function that surrounds

-- the given Doc with appropiate

-- parens

-> GlobalAnnos -> FORMULA f -> Doc

condParensXjunction pf parens_fun ga x =

case x of Negation _ _ -> x'

True_atom _ -> x'

False_atom _ -> x'

Predication _ _ _ -> x'

Existl_equation _ _ _ -> x'

Strong_equation _ _ _ -> x'

Definedness _ _ -> x'

_ -> parens_fun x'

where x' = pf ga x

---- instances of ListCheck for various data types of AS_Basic_CASL ---

instance (PrettyPrint s, PrettyPrint f) =>

ListCheck (SIG_ITEMS s f) where

(Sort_items l _) `innerListGT` i = length l > i

(Op_items l _) `innerListGT` i = length l > i

(Pred_items l _) `innerListGT` i = length l > i

(Datatype_items l _) `innerListGT` i = length l > i

(Ext_SIG_ITEMS _) `innerListGT` _ = False

instance PrettyPrint f => ListCheck (SORT_ITEM f) where

(Sort_decl l _) `innerListGT` i = length l > i

(Subsort_decl l _ _) `innerListGT` i = length l > i

(Subsort_defn _ _ _ _ _) `innerListGT` _ = False

(Iso_decl _ _) `innerListGT` _ = False

instance PrettyPrint f => ListCheck (OP_ITEM f) where

(Op_decl l _ _ _) `innerListGT` i = length l > i

(Op_defn _ _ _ _) `innerListGT` _ = False

instance PrettyPrint f => ListCheck (PRED_ITEM f) where

(Pred_decl l _ _) `innerListGT` i = length l > i

(Pred_defn _ _ _ _) `innerListGT` _ = False

instance ListCheck DATATYPE_DECL where

(Datatype_decl _ _ _) `innerListGT` _ = False

instance ListCheck VAR_DECL where

(Var_decl l _ _) `innerListGT` i = length l > i

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