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-rw-r--r--src/tools/c/GFCC/Print.hs148
1 files changed, 148 insertions, 0 deletions
diff --git a/src/tools/c/GFCC/Print.hs b/src/tools/c/GFCC/Print.hs
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+++ b/src/tools/c/GFCC/Print.hs
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+{-# OPTIONS_GHC -fglasgow-exts #-}
+module GFCC.Print where
+
+-- pretty-printer generated by the BNF converter
+
+import GFCC.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
+ Grm header abstract concretes -> prPrec _i 0 (concatD [prt 0 header , doc (showString ";") , prt 0 abstract , doc (showString ";") , prt 0 concretes])
+ Hdr cid cids -> prPrec _i 0 (concatD [doc (showString "grammar") , prt 0 cid , doc (showString "(") , prt 0 cids , doc (showString ")")])
+ Abs absdefs -> prPrec _i 0 (concatD [doc (showString "abstract") , doc (showString "{") , prt 0 absdefs , doc (showString "}")])
+ Cnc cid cncdefs -> prPrec _i 0 (concatD [doc (showString "concrete") , prt 0 cid , doc (showString "{") , prt 0 cncdefs , doc (showString "}")])
+ Fun cid type' exp -> prPrec _i 0 (concatD [prt 0 cid , doc (showString ":") , prt 0 type' , doc (showString "=") , prt 0 exp])
+ Lin cid term -> prPrec _i 0 (concatD [prt 0 cid , doc (showString "=") , prt 0 term])
+ Typ cids cid -> prPrec _i 0 (concatD [prt 0 cids , doc (showString "->") , prt 0 cid])
+ Tr atom exps -> prPrec _i 0 (concatD [doc (showString "(") , prt 0 atom , prt 0 exps , doc (showString ")")])
+ AC cid -> prPrec _i 0 (concatD [prt 0 cid])
+ AS str -> prPrec _i 0 (concatD [prt 0 str])
+ AI n -> prPrec _i 0 (concatD [prt 0 n])
+ AF d -> prPrec _i 0 (concatD [prt 0 d])
+ AM -> prPrec _i 0 (concatD [doc (showString "?")])
+ R terms -> prPrec _i 0 (concatD [doc (showString "[") , prt 0 terms , doc (showString "]")])
+ P term0 term1 -> prPrec _i 0 (concatD [doc (showString "(") , prt 0 term0 , doc (showString "!") , prt 0 term1 , doc (showString ")")])
+ S terms -> prPrec _i 0 (concatD [doc (showString "(") , prt 0 terms , doc (showString ")")])
+ K tokn -> prPrec _i 0 (concatD [prt 0 tokn])
+ V n -> prPrec _i 0 (concatD [doc (showString "$") , prt 0 n])
+ C n -> prPrec _i 0 (concatD [prt 0 n])
+ F cid -> prPrec _i 0 (concatD [prt 0 cid])
+ FV terms -> prPrec _i 0 (concatD [doc (showString "[|") , prt 0 terms , doc (showString "|]")])
+ W str term -> prPrec _i 0 (concatD [doc (showString "(") , prt 0 str , doc (showString "+") , prt 0 term , doc (showString ")")])
+ RP term0 term1 -> prPrec _i 0 (concatD [doc (showString "(") , prt 0 term0 , doc (showString "@") , prt 0 term1 , doc (showString ")")])
+ TM -> prPrec _i 0 (concatD [doc (showString "?")])
+ L cid term -> prPrec _i 0 (concatD [doc (showString "(") , prt 0 cid , doc (showString "->") , prt 0 term , doc (showString ")")])
+ BV cid -> prPrec _i 0 (concatD [doc (showString "#") , prt 0 cid])
+ KS str -> prPrec _i 0 (concatD [prt 0 str])
+ KP strs variants -> prPrec _i 0 (concatD [doc (showString "[") , doc (showString "pre") , prt 0 strs , doc (showString "[") , prt 0 variants , doc (showString "]") , doc (showString "]")])
+ Var strs0 strs1 -> prPrec _i 0 (concatD [prt 0 strs0 , doc (showString "/") , prt 0 strs1])
+ CId str -> prPrec _i 0 (doc (showString str))
+
+instance Print [Concrete] where
+ prt _ es = case es of
+ [] -> (concatD [])
+ x:xs -> (concatD [prt 0 x , doc (showString ";") , prt 0 xs])
+instance Print [AbsDef] where
+ prt _ es = case es of
+ [] -> (concatD [])
+ x:xs -> (concatD [prt 0 x , doc (showString ";") , prt 0 xs])
+instance Print [CncDef] where
+ prt _ es = case es of
+ [] -> (concatD [])
+ x:xs -> (concatD [prt 0 x , doc (showString ";") , prt 0 xs])
+instance Print [CId] 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 [Term] 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
+ [] -> (concatD [])
+ x:xs -> (concatD [prt 0 x , prt 0 xs])
+instance Print [String] where
+ prt _ es = case es of
+ [] -> (concatD [])
+ x:xs -> (concatD [prt 0 x , prt 0 xs])
+instance Print [Variant] where
+ prt _ es = case es of
+ [] -> (concatD [])
+ [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 05:49:29 +0000