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-rw-r--r--src-3.0/Transfer/Syntax/Print.hs206
1 files changed, 206 insertions, 0 deletions
diff --git a/src-3.0/Transfer/Syntax/Print.hs b/src-3.0/Transfer/Syntax/Print.hs
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+++ b/src-3.0/Transfer/Syntax/Print.hs
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+{-# OPTIONS_GHC -fglasgow-exts #-}
+module Transfer.Syntax.Print where
+
+-- pretty-printer generated by the BNF converter
+
+import Transfer.Syntax.Abs
+import Data.Char
+import Data.List (intersperse)
+
+-- the top-level printing method
+printTree :: Print a => a -> String
+printTree = render . prt 0
+
+type Doc = [ShowS] -> [ShowS]
+
+doc :: ShowS -> Doc
+doc = (:)
+
+render :: Doc -> String
+render d = rend 0 (map ($ "") $ d []) "" where
+ rend i ss = case ss of
+ "[" :ts -> showChar '[' . rend i ts
+ "(" :ts -> showChar '(' . rend i ts
+ "{" :ts -> showChar '{' . new (i+1) . rend (i+1) ts
+ "}" : ";":ts -> new (i-1) . space "}" . showChar ';' . new (i-1) . rend (i-1) ts
+ "}" :ts -> new (i-1) . showChar '}' . new (i-1) . rend (i-1) ts
+ ";" :ts -> showChar ';' . new i . rend i ts
+ t : "," :ts -> showString t . space "," . rend i ts
+ t : ")" :ts -> showString t . showChar ')' . rend i ts
+ t : "]" :ts -> showString t . showChar ']' . rend i ts
+ t :ts -> space t . rend i ts
+ _ -> id
+ new i = showChar '\n' . replicateS (2*i) (showChar ' ') . dropWhile isSpace
+ space t = showString t . (\s -> if null s then "" else (' ':s))
+
+parenth :: Doc -> Doc
+parenth ss = doc (showChar '(') . ss . doc (showChar ')')
+
+concatS :: [ShowS] -> ShowS
+concatS = foldr (.) id
+
+concatD :: [Doc] -> Doc
+concatD = foldr (.) id
+
+unwordsD :: [Doc] -> Doc
+unwordsD = concatD . intersperse (doc (showChar ' '))
+
+replicateS :: Int -> ShowS -> ShowS
+replicateS n f = concatS (replicate n f)
+
+-- the printer class does the job
+class Print a where
+ prt :: Int -> a -> Doc
+
+instance Print Char where
+ prt _ s = doc (showChar '\'' . mkEsc '\'' s . showChar '\'')
+
+instance Print String where
+ prt _ s = doc (showChar '"' . concatS (map (mkEsc '"') s) . showChar '"')
+
+mkEsc :: Char -> Char -> ShowS
+mkEsc q s = case s of
+ _ | s == q -> showChar '\\' . showChar s
+ '\\'-> showString "\\\\"
+ '\n' -> showString "\\n"
+ '\t' -> showString "\\t"
+ _ -> showChar s
+
+prPrec :: Int -> Int -> Doc -> Doc
+prPrec i j = if j<i then parenth else id
+
+
+instance Print Integer where
+ prt _ x = doc (shows x)
+
+
+instance Print Double where
+ prt _ x = doc (shows x)
+
+
+instance Print (Tree c) where
+ prt _i e = case e of
+ Module imports decls -> prPrec _i 0 (concatD [prt 0 imports , prt 0 decls])
+ Import i -> prPrec _i 0 (concatD [doc (showString "import") , prt 0 i])
+ DataDecl i exp consdecls -> prPrec _i 0 (concatD [doc (showString "data") , prt 0 i , doc (showString ":") , prt 0 exp , doc (showString "where") , doc (showString "{") , prt 0 consdecls , doc (showString "}")])
+ TypeDecl i exp -> prPrec _i 0 (concatD [prt 0 i , doc (showString ":") , prt 0 exp])
+ ValueDecl i patterns guard exp -> prPrec _i 0 (concatD [prt 0 i , prt 0 patterns , prt 0 guard , doc (showString "=") , prt 0 exp])
+ DeriveDecl i0 i1 -> prPrec _i 0 (concatD [doc (showString "derive") , prt 0 i0 , prt 0 i1])
+ ConsDecl i exp -> prPrec _i 0 (concatD [prt 0 i , doc (showString ":") , prt 0 exp])
+ GuardExp exp -> prPrec _i 0 (concatD [doc (showString "|") , prt 1 exp])
+ GuardNo -> prPrec _i 0 (concatD [])
+ POr pattern0 pattern1 -> prPrec _i 0 (concatD [prt 1 pattern0 , doc (showString "||") , prt 0 pattern1])
+ PListCons pattern0 pattern1 -> prPrec _i 1 (concatD [prt 2 pattern0 , doc (showString "::") , prt 1 pattern1])
+ PConsTop i pattern patterns -> prPrec _i 2 (concatD [prt 0 i , prt 3 pattern , prt 0 patterns])
+ PCons i patterns -> prPrec _i 3 (concatD [doc (showString "(") , prt 0 i , prt 0 patterns , doc (showString ")")])
+ PRec fieldpatterns -> prPrec _i 3 (concatD [doc (showString "rec") , doc (showString "{") , prt 0 fieldpatterns , doc (showString "}")])
+ PEmptyList -> prPrec _i 3 (concatD [doc (showString "[") , doc (showString "]")])
+ PList commapatterns -> prPrec _i 3 (concatD [doc (showString "[") , prt 0 commapatterns , doc (showString "]")])
+ PTuple commapattern commapatterns -> prPrec _i 3 (concatD [doc (showString "(") , prt 0 commapattern , doc (showString ",") , prt 0 commapatterns , doc (showString ")")])
+ PStr str -> prPrec _i 3 (concatD [prt 0 str])
+ PInt n -> prPrec _i 3 (concatD [prt 0 n])
+ PVar i -> prPrec _i 3 (concatD [prt 0 i])
+ PWild -> prPrec _i 3 (concatD [doc (showString "_")])
+ CommaPattern pattern -> prPrec _i 0 (concatD [prt 0 pattern])
+ FieldPattern i pattern -> prPrec _i 0 (concatD [prt 0 i , doc (showString "=") , prt 0 pattern])
+ EPi varorwild exp0 exp1 -> prPrec _i 0 (concatD [doc (showString "(") , prt 0 varorwild , doc (showString ":") , prt 0 exp0 , doc (showString ")") , doc (showString "->") , prt 0 exp1])
+ EPiNoVar exp0 exp1 -> prPrec _i 0 (concatD [prt 1 exp0 , doc (showString "->") , prt 0 exp1])
+ EAbs varorwild exp -> prPrec _i 1 (concatD [doc (showString "\\") , prt 0 varorwild , doc (showString "->") , prt 1 exp])
+ ELet letdefs exp -> prPrec _i 1 (concatD [doc (showString "let") , doc (showString "{") , prt 0 letdefs , doc (showString "}") , doc (showString "in") , prt 1 exp])
+ ECase exp cases -> prPrec _i 1 (concatD [doc (showString "case") , prt 0 exp , doc (showString "of") , doc (showString "{") , prt 0 cases , doc (showString "}")])
+ EIf exp0 exp1 exp2 -> prPrec _i 1 (concatD [doc (showString "if") , prt 0 exp0 , doc (showString "then") , prt 0 exp1 , doc (showString "else") , prt 1 exp2])
+ EDo binds exp -> prPrec _i 1 (concatD [doc (showString "do") , doc (showString "{") , prt 0 binds , prt 0 exp , doc (showString "}")])
+ EBind exp0 exp1 -> prPrec _i 3 (concatD [prt 3 exp0 , doc (showString ">>=") , prt 4 exp1])
+ EBindC exp0 exp1 -> prPrec _i 3 (concatD [prt 3 exp0 , doc (showString ">>") , prt 4 exp1])
+ EOr exp0 exp1 -> prPrec _i 4 (concatD [prt 5 exp0 , doc (showString "||") , prt 4 exp1])
+ EAnd exp0 exp1 -> prPrec _i 5 (concatD [prt 6 exp0 , doc (showString "&&") , prt 5 exp1])
+ EEq exp0 exp1 -> prPrec _i 6 (concatD [prt 7 exp0 , doc (showString "==") , prt 7 exp1])
+ ENe exp0 exp1 -> prPrec _i 6 (concatD [prt 7 exp0 , doc (showString "/=") , prt 7 exp1])
+ ELt exp0 exp1 -> prPrec _i 6 (concatD [prt 7 exp0 , doc (showString "<") , prt 7 exp1])
+ ELe exp0 exp1 -> prPrec _i 6 (concatD [prt 7 exp0 , doc (showString "<=") , prt 7 exp1])
+ EGt exp0 exp1 -> prPrec _i 6 (concatD [prt 7 exp0 , doc (showString ">") , prt 7 exp1])
+ EGe exp0 exp1 -> prPrec _i 6 (concatD [prt 7 exp0 , doc (showString ">=") , prt 7 exp1])
+ EListCons exp0 exp1 -> prPrec _i 7 (concatD [prt 8 exp0 , doc (showString "::") , prt 7 exp1])
+ EAdd exp0 exp1 -> prPrec _i 8 (concatD [prt 8 exp0 , doc (showString "+") , prt 9 exp1])
+ ESub exp0 exp1 -> prPrec _i 8 (concatD [prt 8 exp0 , doc (showString "-") , prt 9 exp1])
+ EMul exp0 exp1 -> prPrec _i 9 (concatD [prt 9 exp0 , doc (showString "*") , prt 10 exp1])
+ EDiv exp0 exp1 -> prPrec _i 9 (concatD [prt 9 exp0 , doc (showString "/") , prt 10 exp1])
+ EMod exp0 exp1 -> prPrec _i 9 (concatD [prt 9 exp0 , doc (showString "%") , prt 10 exp1])
+ ENeg exp -> prPrec _i 10 (concatD [doc (showString "-") , prt 10 exp])
+ EApp exp0 exp1 -> prPrec _i 11 (concatD [prt 11 exp0 , prt 12 exp1])
+ EProj exp i -> prPrec _i 12 (concatD [prt 12 exp , doc (showString ".") , prt 0 i])
+ ERecType fieldtypes -> prPrec _i 13 (concatD [doc (showString "sig") , doc (showString "{") , prt 0 fieldtypes , doc (showString "}")])
+ ERec fieldvalues -> prPrec _i 13 (concatD [doc (showString "rec") , doc (showString "{") , prt 0 fieldvalues , doc (showString "}")])
+ EEmptyList -> prPrec _i 13 (concatD [doc (showString "[") , doc (showString "]")])
+ EList exps -> prPrec _i 13 (concatD [doc (showString "[") , prt 0 exps , doc (showString "]")])
+ ETuple exp exps -> prPrec _i 13 (concatD [doc (showString "(") , prt 0 exp , doc (showString ",") , prt 0 exps , doc (showString ")")])
+ EVar i -> prPrec _i 13 (concatD [prt 0 i])
+ EType -> prPrec _i 13 (concatD [doc (showString "Type")])
+ EStr str -> prPrec _i 13 (concatD [prt 0 str])
+ EInteger n -> prPrec _i 13 (concatD [prt 0 n])
+ EDouble d -> prPrec _i 13 (concatD [prt 0 d])
+ EMeta -> prPrec _i 13 (concatD [doc (showString "?")])
+ VVar i -> prPrec _i 0 (concatD [prt 0 i])
+ VWild -> prPrec _i 0 (concatD [doc (showString "_")])
+ LetDef i exp -> prPrec _i 0 (concatD [prt 0 i , doc (showString "=") , prt 0 exp])
+ Case pattern guard exp -> prPrec _i 0 (concatD [prt 0 pattern , prt 0 guard , doc (showString "->") , prt 0 exp])
+ BindVar varorwild exp -> prPrec _i 0 (concatD [prt 0 varorwild , doc (showString "<-") , prt 0 exp])
+ BindNoVar exp -> prPrec _i 0 (concatD [prt 0 exp])
+ FieldType i exp -> prPrec _i 0 (concatD [prt 0 i , doc (showString ":") , prt 0 exp])
+ FieldValue i exp -> prPrec _i 0 (concatD [prt 0 i , doc (showString "=") , prt 0 exp])
+ Ident str -> prPrec _i 0 (doc (showString str))
+
+instance Print [Import] where
+ prt _ es = case es of
+ [] -> (concatD [])
+ x:xs -> (concatD [prt 0 x , doc (showString ";") , prt 0 xs])
+instance Print [Decl] where
+ prt _ es = case es of
+ [] -> (concatD [])
+ x:xs -> (concatD [prt 0 x , doc (showString ";") , prt 0 xs])
+instance Print [ConsDecl] where
+ prt _ es = case es of
+ [] -> (concatD [])
+ [x] -> (concatD [prt 0 x])
+ x:xs -> (concatD [prt 0 x , doc (showString ";") , prt 0 xs])
+instance Print [CommaPattern] where
+ prt _ es = case es of
+ [x] -> (concatD [prt 0 x])
+ x:xs -> (concatD [prt 0 x , doc (showString ",") , prt 0 xs])
+instance Print [Pattern] where
+ prt _ es = case es of
+ [] -> (concatD [])
+ x:xs -> (concatD [prt 3 x , prt 0 xs])
+instance Print [FieldPattern] where
+ prt _ es = case es of
+ [] -> (concatD [])
+ [x] -> (concatD [prt 0 x])
+ x:xs -> (concatD [prt 0 x , doc (showString ";") , prt 0 xs])
+instance Print [LetDef] where
+ prt _ es = case es of
+ [] -> (concatD [])
+ [x] -> (concatD [prt 0 x])
+ x:xs -> (concatD [prt 0 x , doc (showString ";") , prt 0 xs])
+instance Print [Case] where
+ prt _ es = case es of
+ [] -> (concatD [])
+ [x] -> (concatD [prt 0 x])
+ x:xs -> (concatD [prt 0 x , doc (showString ";") , prt 0 xs])
+instance Print [Bind] where
+ prt _ es = case es of
+ [] -> (concatD [])
+ x:xs -> (concatD [prt 0 x , doc (showString ";") , prt 0 xs])
+instance Print [FieldType] where
+ prt _ es = case es of
+ [] -> (concatD [])
+ [x] -> (concatD [prt 0 x])
+ x:xs -> (concatD [prt 0 x , doc (showString ";") , prt 0 xs])
+instance Print [FieldValue] where
+ prt _ es = case es of
+ [] -> (concatD [])
+ [x] -> (concatD [prt 0 x])
+ x:xs -> (concatD [prt 0 x , doc (showString ";") , prt 0 xs])
+instance Print [Exp] where
+ prt _ es = case es of
+ [x] -> (concatD [prt 0 x])
+ x:xs -> (concatD [prt 0 x , doc (showString ",") , prt 0 xs])
generated by cgit v1.2.3 (git 2.39.1) at 2026-05-20 20:44:09 +0000