mirror of
https://github.com/GrammaticalFramework/gf-core.git
synced 2026-05-05 01:02:51 -06:00
GF/src is now for 2.9, and the new sources are in src-3.0 - keep it this way until the release of GF 3
This commit is contained in:
aarne
148
src-3.0/tools/c/GFCC/Print.hs
Normal file
148
src-3.0/tools/c/GFCC/Print.hs
Normal file
@@ -0,0 +1,148 @@
|
||||
{-# 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])
|
||||
Reference in New Issue
Block a user