+++ /dev/null
-{-# OPTIONS -Werror -Wall -fno-warn-missing-signatures #-}
-
-module Printer where
-
-import Text.PrettyPrint.HughesPJ
-import Char
-
-import Core
-import Encoding
-import PrimCoercions
-
-instance Show Module where
- showsPrec _ m = shows (pmodule m)
-
-instance Show Tdef where
- showsPrec _ t = shows (ptdef t)
-
-instance Show Cdef where
- showsPrec _ c = shows (pcdef c)
-
-instance Show Vdefg where
- showsPrec _ v = shows (pvdefg v)
-
-instance Show Vdef where
- showsPrec _ v = shows (pvdef v)
-
-instance Show Exp where
- showsPrec _ e = shows (pexp e)
-
-instance Show Alt where
- showsPrec _ a = shows (palt a)
-
-instance Show Ty where
- showsPrec _ t = shows (pty t)
-
-instance Show Kind where
- showsPrec _ k = shows (pkind k)
-
-instance Show Lit where
- showsPrec _ l = shows (plit l)
-
-instance Show CoreLit where
- showsPrec _ l = shows (pclit l)
-
-instance Show KindOrCoercion where
- showsPrec _ (Kind k) = shows (text "<K" <+> pkind k <> text ">")
- showsPrec _ (Coercion (DefinedCoercion tbs (t1,t2))) =
- shows (text "<C" <+> hsep (map ptbind tbs) <+>
- parens (pkind (Keq t1 t2)) <> text ">")
-
-instance Show AnMname where
- showsPrec _ mn = shows (panmname mn)
-
-indent = nest 2
-
--- seems like this is asking for a type class...
-
-pmodule (Module mname tdefs vdefgs) =
- (text "%module" <+> panmname mname)
- $$ indent ((vcat (map ((<> char ';') . ptdef) tdefs))
- $$ (vcat (map ((<> char ';') . pvdefg) vdefgs)))
- <> (if ((not.null) tdefs) || ((not.null) vdefgs) then char '\n' else empty)
- -- add final newline; sigh.
-
-ptdef (Data qtcon tbinds cdefs) =
- (text "%data" <+> pqname qtcon <+> (hsep (map ptbind tbinds)) <+> char '=')
- $$ indent (braces ((vcat (punctuate (char ';') (map pcdef cdefs)))))
-
-ptdef (Newtype qtcon coercion tbinds tyopt) =
- text "%newtype" <+> pqname qtcon <+> pqname coercion
- <+> (hsep (map ptbind tbinds)) $$ indent repclause
- where repclause = char '=' <+> pty tyopt
-
-pcdef (Constr qdcon tbinds tys) =
- (pqname qdcon) <+> (sep [hsep (map pattbind tbinds),sep (map paty tys)])
-
-pname = text
-
-pqname (m,v) = pmname m <> pname v
-
--- be sure to print the '.' here so we don't print out
--- ".foo" for unqualified foo...
-pmname Nothing = empty
-pmname (Just m) = panmname m <> char '.'
-
-panmname (M (P pkgName, parents, name)) =
- let parentStrs = map pname parents in
- pname pkgName <> char ':' <>
- -- This is to be sure to not print out:
- -- main:.Main for when there's a single module name
- -- with no parents.
- (case parentStrs of
- [] -> empty
- _ -> hcat (punctuate hierModuleSeparator
- (map pname parents))
- <> hierModuleSeparator)
- <> pname name
-
--- note that this is not a '.' but a Z-encoded '.':
--- GHCziIOBase.IO, not GHC.IOBase.IO.
--- What a pain.
-hierModuleSeparator = text (zEncodeString ".")
-
-ptbind (t,Klifted) = pname t
-ptbind (t,k) = parens (pname t <> text "::" <> pkind k)
-
-pattbind (t,k) = char '@' <> ptbind (t,k)
-
-pakind (Klifted) = char '*'
-pakind (Kunlifted) = char '#'
-pakind (Kopen) = char '?'
-pakind k = parens (pkind k)
-
-pkind (Karrow k1 k2) = parens (pakind k1 <> text "->" <> pkind k2)
-pkind (Keq from to) = peqkind (from,to)
-pkind k = pakind k
-
-peqkind (t1, t2) = parens (parens (pty t1) <+> text ":=:" <+> parens (pty t2))
-
-paty (Tvar n) = pname n
-paty (Tcon c) = pqname c
-paty t = parens (pty t)
-
-pbty (Tapp(Tapp(Tcon tc) t1) t2) | tc == tcArrow = parens(fsep [pbty t1, text "->",pty t2])
-pbty (Tapp t1 t2) = pappty t1 [t2]
-pbty t = paty t
-
-pty (Tapp(Tapp(Tcon tc) t1) t2) | tc == tcArrow = fsep [pbty t1, text "->",pty t2]
-pty (Tforall tb t) = text "%forall" <+> pforall [tb] t
-pty (TransCoercion t1 t2) =
- (sep ([pqname transCoercion, paty t1, paty t2]))
-pty (SymCoercion t) =
- (sep [pqname symCoercion, paty t])
-pty (UnsafeCoercion t1 t2) =
- (sep [pqname unsafeCoercion, paty t1, paty t2])
-pty (LeftCoercion t) =
- (pqname leftCoercion <+> paty t)
-pty (RightCoercion t) =
- (pqname rightCoercion <+> paty t)
-pty (InstCoercion t1 t2) =
- (sep [pqname instCoercion, paty t1, paty t2])
-pty t = pbty t
-
-pappty (Tapp t1 t2) ts = pappty t1 (t2:ts)
-pappty t ts = sep (map paty (t:ts))
-
-pforall tbs (Tforall tb t) = pforall (tbs ++ [tb]) t
-pforall tbs t = hsep (map ptbind tbs) <+> char '.' <+> pty t
-
-pvdefg (Rec vdefs) = text "%rec" $$ braces (indent (vcat (punctuate (char ';') (map pvdef vdefs))))
-pvdefg (Nonrec vdef) = pvdef vdef
-
-pvdef (Vdef (qv,t,e)) = sep [pqname qv <+> text "::" <+> pty t <+> char '=',
- indent (pexp e)]
-
-paexp (Var x) = pqname x
-paexp (Dcon x) = pqname x
-paexp (Lit l) = plit l
-paexp e = parens(pexp e)
-
-plamexp bs (Lam b e) = plamexp (bs ++ [b]) e
-plamexp bs e = sep [sep (map pbind bs) <+> text "->",
- indent (pexp e)]
-
-pbind (Tb tb) = char '@' <+> ptbind tb
-pbind (Vb vb) = pvbind vb
-
-pfexp (App e1 e2) = pappexp e1 [Left e2]
-pfexp (Appt e t) = pappexp e [Right t]
-pfexp e = paexp e
-
-pappexp (App e1 e2) as = pappexp e1 (Left e2:as)
-pappexp (Appt e t) as = pappexp e (Right t:as)
-pappexp e as = fsep (paexp e : map pa as)
- where pa (Left ex) = paexp ex
- pa (Right t) = char '@' <+> paty t
-
-pexp (Lam b e) = char '\\' <+> plamexp [b] e
-pexp (Let vd e) = (text "%let" <+> pvdefg vd) $$ (text "%in" <+> pexp e)
-pexp (Case e vb t alts) = sep [text "%case" <+> paty t <+> paexp e,
- text "%of" <+> pvbind vb]
- $$ (indent (braces (vcat (punctuate (char ';') (map palt alts)))))
-pexp (Cast e t) = (text "%cast" <+> parens (pexp e)) $$ paty t
-pexp (Note s e) = (text "%note" <+> pstring s) $$ pexp e
--- TODO: ccall shouldn't really be there
-pexp (External n t) = (text "%external ccall" <+> pstring n) $$ paty t
-pexp e = pfexp e
-
-
-pvbind (x,t) = parens(pname x <> text "::" <> pty t)
-
-palt (Acon c tbs vbs e) =
- sep [pqname c,
- sep (map pattbind tbs),
- sep (map pvbind vbs) <+> text "->"]
- $$ indent (pexp e)
-palt (Alit l e) =
- (plit l <+> text "->")
- $$ indent (pexp e)
-palt (Adefault e) =
- (text "%_ ->")
- $$ indent (pexp e)
-
-plit (Literal cl t) = parens (pclit cl <> text "::" <> pty t)
-
-pclit (Lint i) = integer i
--- makes sure to print it out as n % d
-pclit (Lrational r) = text (show r)
-pclit (Lchar c) = text ("\'" ++ escape [c] ++ "\'")
-pclit (Lstring s) = pstring s
-
-pstring s = doubleQuotes(text (escape s))
-
-escape :: String -> String
-escape s = foldr f [] (map ord s)
- where
- f cv rest
- | cv > 0xFF = '\\':'x':hs ++ rest
- | (cv < 0x20 || cv > 0x7e || cv == 0x22 || cv == 0x27 || cv == 0x5c) =
- '\\':'x':h1:h0:rest
- where (q1,r1) = quotRem cv 16
- h1 = intToDigit q1
- h0 = intToDigit r1
- hs = dropWhile (=='0') $ reverse $ mkHex cv
- mkHex 0 = ""
- mkHex num = intToDigit r : mkHex q
- where (q,r) = quotRem num 16
- f cv rest = (chr cv):rest
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