+{-# OPTIONS -Werror -Wall -fno-warn-missing-signatures #-}
+
module Printer where
import Text.PrettyPrint.HughesPJ
-import Numeric (fromRat)
import Char
import Core
import Encoding
+import PrimCoercions
instance Show Module where
- showsPrec d m = shows (pmodule m)
+ showsPrec _ m = shows (pmodule m)
instance Show Tdef where
- showsPrec d t = shows (ptdef t)
+ showsPrec _ t = shows (ptdef t)
instance Show Cdef where
- showsPrec d c = shows (pcdef c)
+ showsPrec _ c = shows (pcdef c)
instance Show Vdefg where
- showsPrec d v = shows (pvdefg v)
+ showsPrec _ v = shows (pvdefg v)
instance Show Vdef where
- showsPrec d v = shows (pvdef v)
+ showsPrec _ v = shows (pvdef v)
instance Show Exp where
- showsPrec d e = shows (pexp e)
+ showsPrec _ e = shows (pexp e)
instance Show Alt where
- showsPrec d a = shows (palt a)
+ showsPrec _ a = shows (palt a)
instance Show Ty where
- showsPrec d t = shows (pty t)
+ showsPrec _ t = shows (pty t)
instance Show Kind where
- showsPrec d k = shows (pkind k)
+ showsPrec _ k = shows (pkind k)
instance Show Lit where
- showsPrec d l = shows (plit l)
+ 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
(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 '=')
$$ indent (braces ((vcat (punctuate (char ';') (map pcdef cdefs)))))
-ptdef (Newtype qtcon tbinds tyopt ) =
- text "%newtype" <+> pqname qtcon <+> (hsep (map ptbind tbinds)) <+>
- (case tyopt of
- Just ty -> char '=' <+> pty ty
- Nothing -> empty)
+ptdef (Newtype qtcon coercion tbinds tyopt) =
+ text "%newtype" <+> pqname qtcon <+> pqname coercion
+ <+> (hsep (map ptbind tbinds)) $$ indent repclause
+ where repclause = case tyopt of
+ Just ty -> char '=' <+> pty ty
+ Nothing -> empty
pcdef (Constr qdcon tbinds tys) =
(pqname qdcon) <+> (sep [hsep (map pattbind tbinds),sep (map paty tys)])
-pname id = text id
+pname = text
-pqname (m,id) = pmname m <> pname id
+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 p@(pkgName, parents, name) =
+panmname (M (pkgName, parents, name)) =
let parentStrs = map pname parents in
pname pkgName <> char ':' <>
-- This is to be sure to not print out:
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)
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)
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 e) = paexp e
+ 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) $$ (text "%in" <+> pexp e)
-pexp (Case e vb t alts) = sep [text "%case" <+> pty t <+> paexp e,
+pexp (Case e vb t alts) = sep [text "%case" <+> paty t <+> paexp e,
text "%of" <+> pvbind vb]
$$ (indent (braces (vcat (punctuate (char ';') (map palt alts)))))
-pexp (Cast e t) = (text "%cast" <+> paty t) $$ pexp e
+pexp (Cast e t) = (text "%cast" <+> parens (pexp e)) $$ paty t
pexp (Note s e) = (text "%note" <+> pstring s) $$ pexp e
-pexp (External n t) = (text "%extcall" <+> pstring n) $$ paty t
+-- TODO: ccall shouldn't really be there
+pexp (External n t) = (text "%external ccall" <+> pstring n) $$ paty t
pexp e = pfexp e
(text "%_ ->")
$$ indent (pexp e)
-plit (Lint i t) = parens (integer i <> text "::" <> pty t)
-plit (Lrational r t) = parens (text (show (fromRat r)) <> text "::" <> pty t)
-plit (Lchar c t) = parens (text ("\'" ++ escape [c] ++ "\'") <> text "::" <> pty t)
-plit (Lstring s t) = parens (pstring s <> text "::" <> pty t)
+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 < 0x20 || cv > 0x7e || cv == 0x22 || cv == 0x27 || cv == 0x5c) =
+ 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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