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module Rebuild where
import Grammar
import ModDeps
import PrGrammar
import Lookup
import Extend
import Macros
import Ident
import Modules
import Operations
-- rebuilding instance + interface, and "with" modules, prior to renaming.
-- AR 24/10/2003
rebuildModule :: [SourceModule] -> SourceModule -> Err SourceModule
rebuildModule ms mo@(i,mi) = do
let gr = MGrammar ms
deps <- moduleDeps ms
is <- openInterfaces deps i
mi' <- case mi of
-- add the interface type signatures into an instance module
ModMod m -> do
testErr (null is || mstatus m == MSIncomplete)
("module" +++ prt i +++ "must be declared incomplete")
mi' <- case mtype m of
MTInstance i0 -> do
m0 <- lookupModule gr i0
m' <- case m0 of
ModMod m1 | isResourceModule m0 -> do ---- mtype m1 == MTInterface -> do
---- checkCompleteInstance m1 m -- do this later, in CheckGrammar
js' <- extendMod i (jments m1) (jments m)
return $ replaceJudgements m js'
_ -> prtBad "interface expected instead of" i0
return mi -----
_ -> return mi
return mi'
-- add the instance opens to an incomplete module "with" instances
ModWith mt stat ext ops -> do
let insts = [(inf,inst) |OQualif _ inf inst <- ops]
let infs = map fst insts
let stat' = ifNull MSComplete (const MSIncomplete)
[i | i <- is, notElem i infs]
testErr (stat' == MSComplete || stat == MSIncomplete)
("module" +++ prt i +++ "remains incomplete")
Module mt0 stat0 fs me ops0 js <- do
mi <- lookupModule gr ext
case mi of
ModMod m -> return m --- check compatibility of module type
_ -> prtBad "expected regular module in 'with' clause, not" ext
let ops1 = ops ++ [o | o <- ops0, notElem (openedModule o) infs]
++ [oQualif i i | i <- map snd insts] ----
--- check if me is incomplete
return $ ModMod $ Module mt0 stat' fs me ops1
(mapTree (qualifInstanceInfo insts) js)
_ -> return mi
return (i,mi')
checkCompleteInstance :: SourceRes -> SourceRes -> Err ()
checkCompleteInstance abs cnc = ifNull (return ()) (Bad . unlines) $
checkComplete [f | (f, ResOper (Yes _) _) <- abs'] cnc'
where
abs' = tree2list $ jments abs
cnc' = mapTree fst $ jments cnc
checkComplete sought given = foldr ckOne [] sought
where
ckOne f = if isInBinTree f given
then id
else (("Error: no definition given to" +++ prt f):)
qualifInstanceInfo :: [(Ident,Ident)] -> (Ident,Info) -> (Ident,Info)
qualifInstanceInfo insts (c,i) = (c,qualInfo i) where
qualInfo i = case i of
ResOper pty pt -> ResOper (qualP pty) (qualP pt)
CncCat pty pt pp -> CncCat (qualP pty) (qualP pt) (qualP pp)
CncFun mp pt pp -> CncFun (qualLin mp) (qualP pt) (qualP pp) ---- mp
ResParam (Yes ps) -> ResParam (yes (map qualParam ps))
ResValue pty -> ResValue (qualP pty)
_ -> i
qualP pt = case pt of
Yes t -> yes $ qual t
May m -> may $ qualId m
_ -> pt
qualId x = maybe x id $ lookup x insts
qual t = case t of
Q m c -> Q (qualId m) c
QC m c -> QC (qualId m) c
_ -> composSafeOp qual t
qualParam (p,co) = (p,[(x,qual t) | (x,t) <- co])
qualLin (Just (c,(co,t))) = (Just (c,([(x,qual t) | (x,t) <- co], qual t)))
qualLin Nothing = Nothing
-- NB constructor patterns never appear in interfaces so we need not rename them
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