{- |

Module : $Header$

Description : Dealing with transformation from/to Haskell and Maude

Copyright : (c) Adrian Riesco, Facultad de Informatica UCM 2009

License : similar to LGPL, see HetCATS/LICENSE.txt or LIZENZ.txt

Maintainer : ariesco@fdi.ucm.es

Stability : experimental

Portability : portable

Translations between Maude and Haskell

-}

{-

Ref.

...

-}

module Maude.Printing where

import Maude.AS_Maude

import Maude.Symbol

import qualified Data.Set as Set

import qualified Data.Map as Map

import qualified Common.Lib.Rel as Rel

import Common.Id (Token)

getSpec :: String -> String

getSpec = quitNil . quitEnd . quitBegin

quitBegin :: String -> String

quitBegin ('S' : ('p' : l)) = 'S' : ('p' : l)

quitBegin (_ : l) = quitBegin l

quitBegin [] = []

quitEnd :: String -> String

quitEnd ('@' : ('#' : ('$' : ('e' : ('n' : _))))) = []

quitEnd (h : l) = h : (quitEnd l)

quitEnd [] = []

quitNil :: String -> String

quitNil = Prelude.filter (/= '\NUL')

printSign :: Set.Set Symbol -> Rel.Rel Symbol

-> Map.Map Symbol (Set.Set ([Symbol], Symbol, [Attr])) -> String

printSign sts sbsts ops = ss ++ sbs ++ opd

where ss = sorts2maude sts

sbs = subsorts2maude sbsts

opd = ops2maude ops

sorts2maude :: Set.Set Symbol -> String

sorts2maude ss = if Set.null ss

then ""

else "sorts " ++ Set.fold (++) "" (Set.map ((++ " ") . show) ss) ++ ".\n"

subsorts2maude :: Rel.Rel Symbol -> String

subsorts2maude ssbs = if Rel.null ssbs

then ""

else foldr (++) "" (map printPair $ Rel.toList ssbs)

printPair :: (Token,Token) -> String

printPair (a,b) = "subsort " ++ show a ++ " < " ++ show b ++ " .\n"

ops2maude :: Map.Map Symbol (Set.Set ([Symbol], Symbol, [Attr])) -> String

ops2maude om = flatten (flatten (map printOp (Map.toList om)))

flatten :: [[a]] -> [a]

flatten [] = []

flatten (a : l) = a ++ (flatten l)

printOp :: (Symbol, Set.Set ([Symbol], Symbol, [Attr])) -> [String]

printOp (opid, s) = map (printOpAux opid) (Set.toList s)

printOpAux :: Symbol -> ([Symbol], Symbol, [Attr]) -> String

printOpAux opid (ar, co, ats) = "op " ++ show opid ++ " : " ++ printArity ar ++

" -> " ++ show co ++ printAttrSet ats ++ " .\n"

printArity :: [Symbol] -> String

printArity a = foldr (++) "" (map showSpace a)

showSpace ::Show t => t -> String

showSpace s = show s ++ " "

printAttrSet :: [Attr] -> String

printAttrSet [] = []

printAttrSet ats = " [ " ++ printAttrSetAux ats ++ " ] "

printAttrSetAux :: [Attr] -> String

printAttrSetAux [] = []

printAttrSetAux [a] = printAttr a

printAttrSetAux (a : ats) = printAttr a ++ " " ++ printAttrSetAux ats

printAttr :: Attr -> String

printAttr Comm = "comm"

printAttr Assoc = "assoc"

printAttr Idem = "idem"

printAttr Iter = "iter"

printAttr Memo = "memo"

printAttr Ctor = "ctor"

printAttr Msg = "msg"

printAttr Object = "object"

printAttr (Id t) = "id: " ++ printTerm t

printAttr (LeftId t) = "id-left: " ++ printTerm t

printAttr (RightId t) = "id-right: " ++ printTerm t

printAttr (Prec p) = "prec " ++ show p

printAttr (Strat ls) = "strat (" ++ printListSpaces ls ++ ")"

printAttr (Poly ls) = "poly (" ++ printListSpaces ls ++ ")"

printAttr (Frozen ls) = if null ls

then "frozen"

else "frozen (" ++ printListSpaces ls ++ ")"

printAttr (Gather ls) = "gather (" ++ printListSpaces ls ++ ")"

printAttr (Format ls) = "format (" ++ printListSpaces ls ++ ")"

printAttr _ = ""

printStmntAttrSet :: [StmntAttr] -> String

printStmntAttrSet [] = []

printStmntAttrSet ats = " [ " ++ printStmntAttrSetAux ats ++ " ] "

printStmntAttrSetAux :: [StmntAttr] -> String

printStmntAttrSetAux [] = []

printStmntAttrSetAux [a] = printAttrStmnt a

printStmntAttrSetAux (a : ats) = printAttrStmnt a ++ " " ++ printStmntAttrSetAux ats

printAttrStmnt :: StmntAttr -> String

printAttrStmnt Owise = "owise"

printAttrStmnt Nonexec = "nonexec"

printAttrStmnt (Metadata s) = "metadata \"" ++ s ++ "\""

printAttrStmnt (Label q) = "label \"" ++ show q ++ "\""

printAttrStmnt (Print _) = ""

printTerm :: Term -> String

printTerm (Const q _) = show q

printTerm (Var q _) = show q

printTerm (Apply q tl) = show q ++ "(" ++ printTermList tl ++ ")"

printTermList :: [Term] -> String

printTermList [] = []

printTermList [t] = printTerm t

printTermList (t : tl) = printTerm t ++ ", " ++ printTermList tl

printListSpaces :: Show t => [t] -> String

printListSpaces = foldr ((++) . showSpace) ""

printMb :: Membership -> String

printMb (Mb t s conds ats) = "mb " ++ printTerm t ++ " : " ++ printSort s ++

printConds conds ++ printStmntAttrSet ats ++ " .\n"

printEq :: Equation -> String

printEq (Eq t1 t2 conds ats) = "eq " ++ printTerm t1 ++ " = " ++ printTerm t2 ++

printConds conds ++ printStmntAttrSet ats ++ " .\n"

printRl :: Rule -> String

printRl (Rl t1 t2 conds ats) = "rl " ++ printTerm t1 ++ " => " ++ printTerm t2 ++

printConds conds ++ printStmntAttrSet ats ++ " .\n"

printSort :: Sort -> String

printSort (SortId q) = show q

printConds :: [Condition] -> String

printConds [] = ""

printConds cs = "if " ++ printCondsAux cs

printCondsAux :: [Condition] -> String

printCondsAux [] = ""

printCondsAux [c] = printCond c

printCondsAux (c : cs) = printCond c ++ " /\\ " ++ printCondsAux cs

printCond :: Condition -> String

printCond (EqCond t1 t2) = printTerm t1 ++ " = " ++ printTerm t2

printCond (MatchCond t1 t2) = printTerm t1 ++ " := " ++ printTerm t2

printCond (MbCond t s) = printTerm t ++ " : " ++ printSort s

printCond (RwCond t1 t2) = printTerm t1 ++ " => " ++ printTerm t2