{-# LANGUAGE RankNTypes, GeneralizedNewtypeDeriving #-}

{- |

Module : $Header$

Description : Central datastructures for development graphs

Copyright : (c) Till Mossakowski, Uni Bremen 2002-2006

License : GPLv2 or higher, see LICENSE.txt

Maintainer : till@informatik.uni-bremen.de

Stability : provisional

Portability : non-portable(Logic)

Central datastructures for development graphs

Follows Sect. IV:4.2 of the CASL Reference Manual.

We also provide functions for constructing and modifying development graphs.

However note that these changes need to be propagated to the GUI if they

also shall be visible in the displayed development graph.

-}

{-

References:

T. Mossakowski, S. Autexier and D. Hutter:

Extending Development Graphs With Hiding.

H. Hussmann (ed.): Fundamental Approaches to Software Engineering 2001,

Lecture Notes in Computer Science 2029, p. 269-283,

Springer-Verlag 2001.

T. Mossakowski, S. Autexier, D. Hutter, P. Hoffman:

CASL Proof calculus. In: CASL reference manual, part IV.

Available from http://www.cofi.info

-}

module Static.DevGraph where

import Syntax.AS_Structured

import Static.GTheory

import Logic.Logic

import Logic.ExtSign

import Logic.Comorphism

import Logic.Grothendieck

import Logic.Prover

import qualified Common.Lib.Rel as Rel

import qualified Common.Lib.Graph as Tree

import qualified Common.Lib.SizedList as SizedList

import qualified Common.OrderedMap as OMap

import Common.AS_Annotation

import Common.GlobalAnnotations

import Common.Id

import Common.Utils (numberSuffix, splitByList)

import Common.LibName

import Common.Consistency

import Control.Concurrent.MVar

import Control.Exception (assert)

import Data.Graph.Inductive.Basic

import Data.Graph.Inductive.Graph as Graph

import Data.Graph.Inductive.Query.DFS

import Data.List

import Data.Maybe

import qualified Data.Map as Map

import qualified Data.Set as Set

import Common.Result

import Debug.Trace

-- * types for structured specification analysis

-- ** basic types

-- | Node with signature in a DG

data NodeSig = NodeSig { getNode :: Node, getSig :: G_sign }

deriving (Eq, Show)

{- | NodeSig or possibly the empty sig in a logic

(but since we want to avoid lots of vsacuous nodes with empty sig,

we do not assign a real node in the DG here) -}

data MaybeNode = JustNode NodeSig | EmptyNode AnyLogic deriving (Show, Eq)

data BasicConsProof = BasicConsProof deriving (Show, Eq) -- needs more details

-- ** node label types

data XPathPart = ElemName String | ChildIndex Int deriving (Show, Eq, Ord)

{- | name of a node in a DG; auxiliary nodes may have extension string

and non-zero number (for these, names are usually hidden). -}

data NodeName = NodeName

{ getName :: SIMPLE_ID

, extString :: String

, extIndex :: Int

, xpath :: [XPathPart]

} deriving (Show, Eq, Ord)

isInternal :: NodeName -> Bool

isInternal n = extIndex n /= 0 || not (null $ extString n)

-- | a wrapper for renamings with a trivial Ord instance

newtype Renamed = Renamed RENAMING deriving Show

instance Ord Renamed where

compare _ _ = EQ

instance Eq Renamed where

_ == _ = True

-- | a wrapper for restrictions with a trivial Ord instance

newtype Restricted = Restricted RESTRICTION deriving Show

instance Ord Restricted where

compare _ _ = EQ

instance Eq Restricted where

_ == _ = True

{- | Data type indicating the origin of nodes and edges in the input language

This is not used in the DG calculus, only may be used in the future

for reconstruction of input and management of change. -}

data DGOrigin =

DGEmpty

| DGBasic

| DGBasicSpec (Maybe G_basic_spec) (Set.Set G_symbol)

| DGExtension

| DGLogicCoercion

| DGTranslation Renamed

| DGUnion

| DGRestriction Restricted

| DGRevealTranslation

| DGFreeOrCofree FreeOrCofree

| DGLocal

| DGClosed

| DGLogicQual

| DGData

| DGFormalParams

| DGImports

| DGInst SIMPLE_ID

| DGFitSpec

| DGFitView SIMPLE_ID

| DGProof

| DGNormalForm Node

| DGintegratedSCC

| DGFlattening

deriving (Show, Eq, Ord)

-- | node content or reference to another library's node

data DGNodeInfo = DGNode

{ node_origin :: DGOrigin -- origin in input language

, node_cons_status :: ConsStatus } -- like a link from the empty signature

| DGRef -- reference to node in a different DG

{ ref_libname :: LibName -- pointer to DG where ref'd node resides

, ref_node :: Node -- pointer to ref'd node

} deriving (Show, Eq)

-- | node inscriptions in development graphs.

-- Nothing entries indicate "not computed yet"

data DGNodeLab =

DGNodeLab

{ dgn_name :: NodeName -- name in the input language

, dgn_theory :: G_theory -- local theory

, globalTheory :: Maybe G_theory -- global theory

, labelHasHiding :: Bool -- has this node an ingoing hiding link

, labelHasFree :: Bool -- has incoming free definition link

, dgn_nf :: Maybe Node -- normal form, for Theorem-Hide-Shift

, dgn_sigma :: Maybe GMorphism -- inclusion of signature into nf signature

, dgn_freenf :: Maybe Node -- normal form for freeness

, dgn_phi :: Maybe GMorphism -- morphism from signature to nffree signature

, nodeInfo :: DGNodeInfo

, dgn_lock :: Maybe (MVar ())

, dgn_symbolpathlist :: G_symbolmap [SLinkPath]

} deriving (Show, Eq)

instance Show (MVar a) where

show _ = ""

isDGRef :: DGNodeLab -> Bool

isDGRef l = case nodeInfo l of

DGNode {} -> False

DGRef {} -> True

hasSenKind :: (forall a . SenStatus a (AnyComorphism, BasicProof) -> Bool)

-> DGNodeLab -> Bool

hasSenKind f dgn = case dgn_theory dgn of

G_theory _lid _sigma _ sens _ -> not $ Map.null $ OMap.filter f sens

-- | test if a given node label has local open goals

hasOpenGoals :: DGNodeLab -> Bool

hasOpenGoals = hasSenKind (\ s -> not (isAxiom s) && not (isProvenSenStatus s))

-- | check if the node has an internal name

isInternalNode :: DGNodeLab -> Bool

isInternalNode DGNodeLab {dgn_name = n} = isInternal n

getNodeConsStatus :: DGNodeLab -> ConsStatus

getNodeConsStatus lbl = case nodeInfo lbl of

DGRef {} -> mkConsStatus None

DGNode { node_cons_status = c } -> c

getNodeCons :: DGNodeLab -> Conservativity

getNodeCons nl = case getNodeConsStatus nl of

ConsStatus cons _ _ -> cons

-- | returns the Conservativity if the given node has one, otherwise none

getNodeConservativity :: LNode DGNodeLab -> Conservativity

getNodeConservativity = getNodeCons . snd

-- | test if a node conservativity is open,

-- return input for refs or nodes with normal forms

hasOpenNodeConsStatus :: Bool -> DGNodeLab -> Bool

hasOpenNodeConsStatus b lbl = if isJust $ dgn_nf lbl then b else

hasOpenConsStatus b $ getNodeConsStatus lbl

markNodeConsistency :: Conservativity -> String -> DGNodeLab -> DGNodeLab

markNodeConsistency newc str dgnode = dgnode

{ nodeInfo = case nodeInfo dgnode of

ninfo@DGNode { node_cons_status = ConsStatus c pc thm } ->

if pc == newc && isProvenThmLinkStatus thm then ninfo else

ninfo { node_cons_status = ConsStatus c newc

$ Proven (DGRule $ showConsistency newc ++ str)

emptyProofBasis }

ninfo -> ninfo }

markNodeConsistent :: String -> DGNodeLab -> DGNodeLab

markNodeConsistent = markNodeConsistency Cons

markNodeInconsistent :: String -> DGNodeLab -> DGNodeLab

markNodeInconsistent = markNodeConsistency Inconsistent

-- | test if a conservativity is open, return input for None

hasOpenConsStatus :: Bool -> ConsStatus -> Bool

hasOpenConsStatus b (ConsStatus cons _ thm) = case cons of

None -> b

_ -> not $ isProvenThmLinkStatus thm

data DGNodeType = DGNodeType

{ isRefType :: Bool

, isProvenNode :: Bool

, isProvenCons :: Bool

, isInternalSpec :: Bool }

deriving (Eq, Ord, Show)

-- | creates a DGNodeType from a DGNodeLab

getRealDGNodeType :: DGNodeLab -> DGNodeType

getRealDGNodeType dgnlab = DGNodeType

{ isRefType = isDGRef dgnlab

, isProvenNode = not $ hasOpenGoals dgnlab

, isProvenCons = not $ hasOpenNodeConsStatus False dgnlab

, isInternalSpec = isInternalNode dgnlab }

-- | Creates a list with all DGNodeType types

listDGNodeTypes :: [DGNodeType]

listDGNodeTypes = let bs = [False, True] in

[ DGNodeType

{ isRefType = ref

, isProvenNode = isEmpty'

, isProvenCons = proven

, isInternalSpec = spec }

| ref <- bs

, isEmpty' <- bs

, proven <- bs

, spec <- bs ]

-- ** edge label types

{- an edge id used to be represented as a list of ints.

the reason of an edge can have multiple ids is, for example, there exists

an proven edge e1 with id 1 and an unproven edge e2 with id 2 between

two nodes. Now after applying some rules e2 is proven, but it's actually

the same as the proven edge e1, then the proven e2 should not be inserted

into the graph again, but e1 will take e2's id 2 because 2 is probably

saved in some other places. As a result, e1 would have 1 and 2 as its id.

This type can be extended to a more complicated struture, like a tree

suggested by Till.

-}

-- | unique number for edges

newtype EdgeId = EdgeId Int deriving (Show, Eq, Ord, Enum)

-- | the first edge in a graph

startEdgeId :: EdgeId

startEdgeId = EdgeId 0

showEdgeId :: EdgeId -> String

showEdgeId (EdgeId i) = show i

-- | a set of used edges

newtype ProofBasis = ProofBasis { proofBasis :: Set.Set EdgeId }

deriving (Show, Eq, Ord)

-- | a wrapper for fitting morphisms with a trivial Eq instance

newtype Fitted = Fitted [G_mapping] deriving Show

instance Eq Fitted where

_ == _ = True

data DGLinkOrigin =

SeeTarget

| SeeSource

| TEST

| DGImpliesLink

| DGLinkExtension

| DGLinkTranslation

| DGLinkClosedLenv

| DGLinkImports

| DGLinkMorph SIMPLE_ID

| DGLinkInst SIMPLE_ID Fitted

| DGLinkInstArg SIMPLE_ID

| DGLinkView SIMPLE_ID Fitted

| DGLinkFitView SIMPLE_ID

| DGLinkFitViewImp SIMPLE_ID

| DGLinkProof

| DGLinkFlatteningUnion

| DGLinkFlatteningRename

| DGLinkRefinement SIMPLE_ID

deriving (Show, Eq)

-- | name of the LinkOrigin if existent

getLinkOriginName :: DGLinkOrigin -> Maybe SIMPLE_ID

getLinkOriginName lo = case lo of

DGLinkMorph sid -> Just sid

DGLinkInst sid _ -> Just sid

DGLinkInstArg sid -> Just sid

DGLinkView sid _ -> Just sid

DGLinkFitView sid -> Just sid

DGLinkFitViewImp sid -> Just sid

_ -> Nothing

{- | Rules in the development graph calculus,

Sect. IV:4.4 of the CASL Reference Manual explains them in depth

mutual recursive with 'DGLinkLab', 'DGLinkType', and 'ThmLinkStatus'

-}

data DGRule =

DGRule String

| DGRuleWithEdge String (LEdge DGLinkLab)

| DGRuleLocalInference [(String, String)] -- renamed theorems

| Composition [LEdge DGLinkLab]

deriving (Show, Eq)

-- | proof status of a link

data ThmLinkStatus = LeftOpen | Proven DGRule ProofBasis deriving (Show, Eq)

isProvenThmLinkStatus :: ThmLinkStatus -> Bool

isProvenThmLinkStatus tls = case tls of

LeftOpen -> False

_ -> True

data Scope = Local | Global deriving (Show, Eq, Ord)

data LinkKind = DefLink | ThmLink ThmLinkStatus deriving (Show, Eq)

data FreeOrCofree = Free | Cofree | NPFree deriving (Show, Eq, Ord)

data ConsStatus = ConsStatus Conservativity Conservativity ThmLinkStatus

deriving (Show, Eq)

isProvenConsStatusLink :: ConsStatus -> Bool

isProvenConsStatusLink = not . hasOpenConsStatus False

mkConsStatus :: Conservativity -> ConsStatus

mkConsStatus c = ConsStatus c None LeftOpen

{- | Link types of development graphs,

Sect. IV:4.2 of the CASL Reference Manual explains them in depth. -}

data DGLinkType =

ScopedLink Scope LinkKind ConsStatus

| HidingDefLink

| FreeOrCofreeDefLink FreeOrCofree MaybeNode -- the "parameter" node

| HidingFreeOrCofreeThm (Maybe FreeOrCofree) GMorphism ThmLinkStatus

-- DGLink S1 S2 m2 (DGLinkType m1 p) n

-- corresponds to a span of morphisms

-- S1 <--m1-- S --m2--> S2

deriving (Show, Eq)

-- | extract theorem link status from link type

thmLinkStatus :: DGLinkType -> Maybe ThmLinkStatus

thmLinkStatus t = case t of

ScopedLink _ (ThmLink s) _ -> Just s

HidingFreeOrCofreeThm _ _ s -> Just s

_ -> Nothing

-- | link inscriptions in development graphs

data DGLinkLab = DGLink

{ dgl_morphism :: GMorphism -- signature morphism of link

, dgl_type :: DGLinkType -- type: local, global, def, thm?

, dgl_origin :: DGLinkOrigin -- origin in input language

, dglPending :: Bool -- open proofs of edges in proof basis

, dgl_id :: EdgeId -- id of the edge

, dglName :: NodeName -- name of the edge

} deriving (Show, Eq)

mkDGLink :: GMorphism -> DGLinkType -> DGLinkOrigin -> NodeName -> EdgeId

-> DGLinkLab

mkDGLink mor ty orig nn ei = DGLink

{ dgl_morphism = mor

, dgl_type = ty

, dgl_origin = orig

, dglPending = False

, dgl_id = ei

, dglName = nn }

-- | name a link

nameDGLink :: NodeName -> DGLinkLab -> DGLinkLab

nameDGLink nn l = l { dglName = nn }

defDGLink :: GMorphism -> DGLinkType -> DGLinkOrigin -> DGLinkLab

-- See svn-version 13804 for a naming concept which unfortunately introduced

-- same names for different links.

defDGLink m ty orig = mkDGLink m ty orig (makeName $ mkSimpleId "")

defaultEdgeId

globDefLink :: GMorphism -> DGLinkOrigin -> DGLinkLab

globDefLink m = defDGLink m globalDef

-- | describe the link type of the label

getDGLinkType :: DGLinkLab -> String

getDGLinkType = getDGEdgeTypeName . getRealDGLinkType

-- | converts a DGEdgeType to a String

getDGEdgeTypeName :: DGEdgeType -> String

getDGEdgeTypeName e =

(if isInc e then (++ "Inc") else id)

$ getDGEdgeTypeModIncName $ edgeTypeModInc e

getDGEdgeTypeModIncName :: DGEdgeTypeModInc -> String

getDGEdgeTypeModIncName et = case et of

ThmType thm isPrvn _ _ ->

let prvn = (if isPrvn then "P" else "Unp") ++ "roven" in

case thm of

HidingThm -> prvn ++ "HidingThm"

FreeOrCofreeThm -> prvn ++ "Thm"

GlobalOrLocalThm scope isHom ->

let het = if isHom then id else ("Het" ++) in

het (case scope of

Local -> "Local"

Global -> if isHom then "Global" else "") ++ prvn ++ "Thm"

FreeOrCofreeDef -> "Def"

_ -> show et

data DGEdgeType = DGEdgeType

{ edgeTypeModInc :: DGEdgeTypeModInc

, isInc :: Bool }

deriving (Eq, Ord, Show)

data DGEdgeTypeModInc =

GlobalDef

| HetDef

| HidingDef

| LocalDef

| FreeOrCofreeDef -- free or cofree

| ThmType { thmEdgeType :: ThmTypes

, isProvenEdge :: Bool

, isConservativ :: Bool

, isPending :: Bool }

deriving (Eq, Ord, Show)

data ThmTypes =

HidingThm

| FreeOrCofreeThm

| GlobalOrLocalThm { isLocalThmType :: Scope

, isHomThm :: Bool }

deriving (Eq, Ord, Show)

getHomEdgeType :: Bool -> Bool -> DGLinkType -> DGEdgeTypeModInc

getHomEdgeType isPend isHom lt = case lt of

ScopedLink scope lk cons -> case lk of

DefLink -> case scope of

Local -> LocalDef

Global -> if isHom then GlobalDef else HetDef

ThmLink st -> ThmType

{ thmEdgeType = GlobalOrLocalThm scope isHom

, isProvenEdge = isProvenThmLinkStatus st

, isConservativ = isProvenConsStatusLink cons

, isPending = isPend } -- needs to be checked

HidingDefLink -> HidingDef

FreeOrCofreeDefLink _ _ -> FreeOrCofreeDef

HidingFreeOrCofreeThm mh _ st -> ThmType

{ thmEdgeType = case mh of

Nothing -> HidingThm

_ -> FreeOrCofreeThm

, isProvenEdge = isProvenThmLinkStatus st

, isConservativ = True

, isPending = isPend }

-- | creates a DGEdgeType from a DGLinkLab

getRealDGLinkType :: DGLinkLab -> DGEdgeType

getRealDGLinkType lnk = let

gmor = dgl_morphism lnk

in DGEdgeType

{ edgeTypeModInc = getHomEdgeType (dglPending lnk) (isHomogeneous gmor)

$ dgl_type lnk

, isInc = case gmor of

GMorphism cid _ _ mor _ -> isInclusionComorphism cid && isInclusion mor

}

-- | Creates a list with all DGEdgeType types

listDGEdgeTypes :: [DGEdgeType]

listDGEdgeTypes =

[ DGEdgeType { edgeTypeModInc = modinc

, isInc = isInclusion' }

| modinc <-

[ GlobalDef

, HetDef

, HidingDef

, LocalDef

, FreeOrCofreeDef ] ++

[ ThmType { thmEdgeType = thmType

, isProvenEdge = proven

, isConservativ = cons

, isPending = pending }

| thmType <-

[ HidingThm

, FreeOrCofreeThm] ++

[ GlobalOrLocalThm { isLocalThmType = local

, isHomThm = hom }

| local <- [Local, Global]

, hom <- [True, False]

]

, proven <- [True, False]

, cons <- [True, False]

, pending <- [True, False]

]

, isInclusion' <- [True, False]

]

-- ** types for global environments

-- | import, formal parameters and united signature of formal params

data GenSig = GenSig MaybeNode [NodeSig] MaybeNode deriving Show

-- | genericity and body

data ExtGenSig = ExtGenSig GenSig NodeSig deriving Show

-- | source, morphism, parameterized target

data ExtViewSig = ExtViewSig NodeSig GMorphism ExtGenSig deriving Show

{- ** types for architectural and unit specification analysis

(as defined for basic static semantics in Chap. III:5.1) -}

data UnitSig = UnitSig [NodeSig] NodeSig deriving (Show, Eq)

data ImpUnitSigOrSig = ImpUnitSig MaybeNode UnitSig | Sig NodeSig

deriving (Show, Eq)

type StUnitCtx = Map.Map SIMPLE_ID ImpUnitSigOrSig

emptyStUnitCtx :: StUnitCtx

emptyStUnitCtx = Map.empty

-- data ArchSig = ArchSig StUnitCtx UnitSig deriving Show

-- this type is superseeded by RefSig

type RefSigMap = Map.Map SIMPLE_ID RefSig

type BStContext = Map.Map SIMPLE_ID RefSig

-- there should be only BranchRefSigs

data RefSig = BranchRefSig RTPointer (UnitSig, Maybe BranchSig)

| ComponentRefSig RTPointer RefSigMap

deriving (Eq)

instance Show RefSig where

-- made this instance for debugging purposes

show (BranchRefSig _ (usig, mbsig)) =

let bStr = case mbsig of

Nothing -> "Bottom\n "

Just bsig -> case bsig of

UnitSigAsBranchSig u ->

if u == usig then "same"

else "UnitSigAsBranch:" ++ shows u "\n "

BranchStaticContext bst ->

foldl (++) "branching: "

$ map (\ (n, s) -> shows n " mapped to\n" ++ shows s "\n")

$ Map.toList bst

in

"Branch: \n before refinement:\n " ++ show usig ++

"\n after refinement: \n" ++ bStr ++ "\n"

show (ComponentRefSig _ rsm) =

foldl (++) "CompRefSig:" $ map (\ n -> show n ++ "\n ") $

Map.toList rsm

getPointerFromRef :: RefSig -> RTPointer

getPointerFromRef (BranchRefSig p _) = p

getPointerFromRef (ComponentRefSig p _) = p

setPointerInRef :: RefSig -> RTPointer -> RefSig

setPointerInRef (BranchRefSig _ x) y = BranchRefSig y x

setPointerInRef (ComponentRefSig _ x) y = ComponentRefSig y x

getUnitSigFromRef :: RefSig -> Result UnitSig

getUnitSigFromRef (BranchRefSig _ (usig, _)) = return usig

getUnitSigFromRef (ComponentRefSig _ rsm) =

error $ "getUnitSigFromRef:" ++ show (Map.keys rsm)

mkRefSigFromUnit :: UnitSig -> RefSig

mkRefSigFromUnit usig = BranchRefSig RTNone

(usig, Just $ UnitSigAsBranchSig usig)

mkBotSigFromUnit :: UnitSig -> RefSig

mkBotSigFromUnit usig = BranchRefSig RTNone (usig, Nothing)

data BranchSig = UnitSigAsBranchSig UnitSig

| BranchStaticContext BStContext

deriving (Show, Eq)

type RefStUnitCtx = Map.Map SIMPLE_ID RefSig

-- only BranchRefSigs allowed

emptyRefStUnitCtx :: RefStUnitCtx

emptyRefStUnitCtx = Map.empty

-- Auxiliaries for refinament signatures composition

matchesContext :: RefSigMap -> BStContext -> Bool

matchesContext rsmap bstc =

null (filter (`notElem` Map.keys bstc) $ Map.keys rsmap)

&& namesMatchCtx (Map.keys rsmap) bstc rsmap

equalSigs :: UnitSig -> UnitSig -> Bool

equalSigs (UnitSig ls1 ns1) (UnitSig ls2 ns2) =

length ls1 == length ls2 && getSig ns1 == getSig ns2

&& all (\ (x1, x2) -> getSig x1 == getSig x2) (zip ls1 ls2)

namesMatchCtx :: [SIMPLE_ID] -> BStContext -> RefSigMap -> Bool

namesMatchCtx [] _ _ = True

namesMatchCtx (un : unitNames) bstc rsmap =

case (Map.findWithDefault (error "namesMatchCtx")

un bstc) of

BranchRefSig _ (_usig, mbsig) -> case mbsig of

Nothing -> False -- should not be the case

Just bsig -> case bsig of

UnitSigAsBranchSig usig' ->

case Map.findWithDefault (error "USABS") un rsmap of

BranchRefSig _ (usig'', _mbsig') -> equalSigs usig' usig'' &&

namesMatchCtx unitNames bstc rsmap

_ -> False

BranchStaticContext bstc' ->

case rsmap Map.! un of

ComponentRefSig _ rsmap' -> -- check whether this is needed!

matchesContext rsmap' bstc' &&

namesMatchCtx unitNames bstc rsmap

-- This is where I introduce something new wrt to the refinement paper:

-- if bstc' has only one element

-- it suffices to have the signature of that element

-- matching the signature from rsmap'

_ -> Map.size bstc' == 1 &&

let un1 = head $ Map.keys bstc'

rsmap' = Map.mapKeys (\ x -> if x == un then un1 else x)

rsmap

in namesMatchCtx [un1] bstc' rsmap' &&

namesMatchCtx unitNames bstc rsmap

_ -> False -- this should never be the case

modifyCtx :: [SIMPLE_ID] -> RefSigMap -> BStContext -> BStContext

-- this function needs to be checked!

modifyCtx [] _ bstc = bstc

modifyCtx (un : unitNames) rsmap bstc =

case bstc Map.! un of

BranchRefSig n1 (usig, mbsig) -> case mbsig of

Nothing -> modifyCtx unitNames rsmap bstc -- should not be the case

Just bsig -> case bsig of

UnitSigAsBranchSig usig' ->

case rsmap Map.! un of

BranchRefSig n2 (usig'', bsig'') -> if equalSigs usig' usig'' then

modifyCtx unitNames rsmap $

Map.insert un (BranchRefSig (trace "1" $ compPointer n1 n2)

(usig, bsig'')) bstc -- was usig'

else error "illegal composition"

_ -> modifyCtx unitNames rsmap bstc

BranchStaticContext bstc' ->

case rsmap Map.! un of

ComponentRefSig n2 rsmap' -> modifyCtx unitNames rsmap $

Map.insert un

(BranchRefSig (trace "2" $ compPointer n1 n2) (usig, Just $

BranchStaticContext $ modifyCtx (Map.keys rsmap') rsmap' bstc'))

bstc

_ -> let f = if Map.size bstc' == 1 then

let un1 = head $ Map.keys bstc'

rsmap' = Map.mapKeys

(\ x -> if x == un then un1 else x)

rsmap

bstc'' = modifyCtx [un1] rsmap' bstc'

in Map.singleton un $

BranchRefSig RTNone (usig, Just

$ BranchStaticContext bstc'')

else Map.empty

in Map.union f $ modifyCtx unitNames rsmap bstc

_ -> modifyCtx unitNames rsmap bstc -- same as above

-- Signature composition

refSigComposition :: RefSig -> RefSig -> Result RefSig

refSigComposition (BranchRefSig n1 (usig1, Just (UnitSigAsBranchSig usig2)))

(BranchRefSig n2 (usig3, bsig)) =

if equalSigs usig2 usig3 then

return $ BranchRefSig (trace "3" $ compPointer n1 n2) (usig1, bsig)

else fail $ "Signatures: \n" ++ show usig2 ++ "\n and \n " ++ show usig3 ++

" do not compose"

refSigComposition _rsig1@(BranchRefSig n1

(usig1, Just (BranchStaticContext bstc)))

_rsig2@(ComponentRefSig n2 rsmap) =

if matchesContext rsmap bstc then

return $ BranchRefSig (trace "4" $ compPointer n1 n2)

(usig1, Just $ BranchStaticContext $

modifyCtx (Map.keys rsmap) rsmap bstc)

else fail ("Signatures do not match:" ++ show (Map.keys bstc) ++ " "

++ show (Map.keys rsmap))

refSigComposition (ComponentRefSig n1 rsmap1) (ComponentRefSig n2 rsmap2) = do

upd <- mapM (\ x -> do

s <- refSigComposition (rsmap1 Map.! x) (rsmap2 Map.! x)

return (x, s))

$ filter (`elem` Map.keys rsmap1) $ Map.keys rsmap2

let unionMap = Map.union (Map.fromList upd) $

Map.union rsmap1 rsmap2

return $ ComponentRefSig (trace "5" $ compPointer n1 n2) unionMap

refSigComposition _rsig1 _rsig2 =

fail "composition of refinement signatures"

-- | an entry of the global environment

data GlobalEntry =

SpecEntry ExtGenSig

| StructEntry ExtViewSig

| ViewEntry ExtViewSig

| ArchEntry RefSig

| UnitEntry UnitSig

| RefEntry RefSig

deriving Show

type GlobalEnv = Map.Map SIMPLE_ID GlobalEntry

-- ** change and history types

-- | the edit operations of the DGraph

data DGChange =

InsertNode (LNode DGNodeLab)

| DeleteNode (LNode DGNodeLab)

| InsertEdge (LEdge DGLinkLab)

| DeleteEdge (LEdge DGLinkLab)

-- it contains the old label and new label with node

| SetNodeLab DGNodeLab (LNode DGNodeLab)

deriving (Show, Eq)

data HistElem =

HistElem DGChange

| HistGroup DGRule ProofHistory

deriving (Show, Eq)

type ProofHistory = SizedList.SizedList HistElem

-- datatypes for the refinement tree

data RTNodeType = RTPlain UnitSig | RTRef Node deriving (Show, Eq)

data RTNodeLab = RTNodeLab

{ rtn_type :: RTNodeType

, rtn_name :: String

} deriving Eq

instance Show RTNodeLab where

show r =

let

name = rtn_name r

t = rtn_type r

t1 = case t of

RTPlain _u -> "plain: " -- ++ show u

RTRef n -> show n

in name ++ " " ++ t1

data RTLinkType =

RTRefine

| RTComp

| RTTyping

| RTGiven

deriving (Show, Eq)

data RTLinkLab = RTLink

{ rtl_type :: RTLinkType

} deriving (Show, Eq)

-- utility functions for handling refinement tree

addNodeRT :: DGraph -> UnitSig -> String -> (Node, DGraph)

addNodeRT dg usig s =

let

g = refTree dg

n = Tree.getNewNode g

l = RTNodeLab {

rtn_type = RTPlain usig

, rtn_name = s

}

in (n, dg {refTree = insNode (n, l) g})

addSpecNodeRT :: DGraph -> UnitSig -> String -> (Node, DGraph)

addSpecNodeRT dg usig s =

let

(n, dg') = addNodeRT dg usig s

f = Map.insert s n $ specRoots dg'

in (n, dg' {specRoots = f})

addNodeRefRT :: DGraph -> Node -> String -> (Node, DGraph)

addNodeRefRT dg n s =

let

g = refTree dg

-- n = Map.findWithDefault (error "addNodeRefRT") s $ specRoots dg

n' = Tree.getNewNode g

l = RTNodeLab {

rtn_type = RTRef n,

rtn_name = s}

g0 = insNode (n', l) g

dg' = addTypingEdgeRT dg {refTree = g0} n' n

in (n', dg')

addTypingEdgeRT :: DGraph -> Node -> Node -> DGraph

addTypingEdgeRT dg n1 n2 = let

g0 = refTree dg

orderRT _ _ = GT

(g', _) = Tree.insLEdge True orderRT

(n1, n2, RTLink {rtl_type = RTTyping}) g0

in dg {refTree = g'}

updateNodeNameRT :: DGraph -> Node -> String -> DGraph

updateNodeNameRT dg n s = -- trace (s ++ ":" ++ show n)$

let

g = refTree dg

l = Graph.lab g n

in case l of

Nothing -> dg

Just oldL -> let

newL = oldL {rtn_name = s}

(g', _) = Tree.labelNode (n, newL) g

in dg {refTree = g'}

updateNodeNameSpecRT :: DGraph -> Node -> String -> DGraph

updateNodeNameSpecRT dg n s =

let dg' = updateNodeNameRT dg n s

in dg' {specRoots = Map.insert s n $ specRoots dg}

copySubTree :: DGraph -> Node -> Maybe Node -> (DGraph, Map.Map Node Node)

copySubTree dg n mN =

case mN of

Nothing -> let

rTree = refTree dg

n' = Tree.getNewNode rTree

nLab = fromMaybe (error "copyNode") $ lab rTree n

rTree' = insNode (n', nLab) rTree

in copySubTreeN dg {refTree = rTree'} [n] $ Map.fromList [(n, n')]

Just y -> -- trace (show y) $

copySubTreeN dg [n] $ Map.fromList [(n, y)]

copySubTreeN :: DGraph -> [Node] -> Map.Map Node Node

-> (DGraph, Map.Map Node Node)

copySubTreeN dg nList pairs =

case nList of

[] -> (dg, pairs)

n : nList' -> let

rTree = refTree dg

pairsN = Map.findWithDefault (error "copy") n pairs

descs = lsuc rTree n

(dg', pairs') = -- trace ("descs:" ++ show descs)$

foldl (copyNode pairsN) (dg, pairs) descs

in copySubTreeN dg' (nub $ nList' ++ map fst descs) pairs'

copyNode :: Node -> (DGraph, Map.Map Node Node) -> LNode RTLinkLab

-> (DGraph, Map.Map Node Node)

copyNode s (dg, nMap) (n, eLab) = let

rTree = refTree dg

nLab = fromMaybe (error "copyNode") $ lab rTree n

n' = Tree.getNewNode rTree

rTree' = insNode (n', nLab) rTree -- the node

orderRT _ _ = GT

(rTree'', _) = -- trace ("ins:" ++ show s ++ " " ++ show n')$

Tree.insLEdge True orderRT (s, n', eLab) rTree'

in (dg {refTree = rTree''}, Map.insert n n' nMap)

-- pt fiecare nod din nList

-- adauga descendentii si muchiile care intra in ei

-- apel recursiv pana nList e vida

addRefEdgeRT :: DGraph -> Node -> Node -> DGraph

addRefEdgeRT dg n1 n2 =

let

g = refTree dg

orderRT _ _ = GT

(g', b) = Tree.insLEdge True orderRT

(n1, n2, RTLink {rtl_type = RTRefine}) g

in if b then dg {refTree = g'}

else error "addRefEdgeRT"

addEdgesToNodeRT :: DGraph -> [Node] -> Node -> DGraph

addEdgesToNodeRT dg' rnodes n' =

let

g = refTree dg'

orderRT _ _ = GT

(g', b) = foldl (\ (g0, b0) n0 -> let

(g1, b1) = Tree.insLEdge True orderRT

(n', n0, RTLink {rtl_type = RTComp}) g0

in (g1, b1 && b0))

(g, True) rnodes

in if not b then error "addEdgesToNodeRT"

else dg' {refTree = g'}

-- datatypes for storing the nodes of the ref tree in the global env

data RTPointer =

RTNone

| NPUnit Node

| NPBranch Node (Map.Map SIMPLE_ID RTPointer)

-- here the leaves can be either NPUnit or NPComp

| NPRef Node Node

| NPComp (Map.Map SIMPLE_ID RTPointer)

-- here the leaves can be NPUnit or NPComp

-- and roots are needed for inserting edges

deriving (Show, Eq)

-- map nodes

mapRTNodes :: Map.Map Node Node -> RTPointer -> RTPointer

mapRTNodes f rtp = let app = flip $ Map.findWithDefault (error "mapRTNodes")

in case rtp of

RTNone -> RTNone

NPUnit x -> NPUnit (app f x)

NPRef x y -> NPRef (app f x) (app f y)

NPBranch x g -> NPBranch (app f x) (Map.map (mapRTNodes f) g)

NPComp g -> NPComp (Map.map (mapRTNodes f) g)

-- compositions

compPointer :: RTPointer -> RTPointer -> RTPointer

compPointer (NPUnit n1) (NPUnit n2) = NPRef n1 n2

compPointer (NPUnit n1) (NPBranch _ f) = NPBranch n1 f

compPointer (NPUnit n1) (NPRef _ n2) = NPRef n1 n2

compPointer (NPRef n1 _) (NPRef _ n2) = NPRef n1 n2

compPointer (NPRef n1 _) (NPBranch _ f) = NPBranch n1 f

compPointer (NPBranch n1 f1) (NPComp f2) =

NPBranch n1 (Map.unionWith (\ _ y -> y) f1 f2 )

compPointer (NPComp f1) (NPComp f2) =

NPComp (Map.unionWith (\ _ y -> y) f1 f2)

compPointer x y = error $ "compPointer:" ++ show x ++ " " ++ show y

-- sources

refSource :: RTPointer -> Node

refSource (NPUnit n) = n

refSource (NPBranch n _) = n

refSource (NPRef n _) = n

refSource x = error ("refSource:" ++ show x)

data RTLeaves = RTLeaf Node | RTLeaves (Map.Map SIMPLE_ID RTLeaves)

deriving Show

refTarget :: RTPointer -> RTLeaves

refTarget (NPUnit n) = RTLeaf n

refTarget (NPRef _ n) = RTLeaf n

refTarget (NPComp f) = RTLeaves $ Map.map refTarget f

refTarget (NPBranch _ f) = RTLeaves $ Map.map refTarget f

refTarget x = error ("refTarget:" ++ show x)

-- join refinement subtrees

-- joinTrees :: DGraph -> RTPointer -> RTPointer -> DGraph

-- I copied these types from ArchDiagram

-- to store the diagrams of the arch specs in the dgraph

data DiagNodeLab = DiagNode { dn_sig :: NodeSig, dn_desc :: String }

deriving Show

data DiagLinkLab = DiagLink { dl_morphism :: GMorphism, dl_number :: Int }

instance Show DiagLinkLab where

show _ = ""

data Diag = Diagram {

diagGraph :: Tree.Gr DiagNodeLab DiagLinkLab,

numberOfEdges :: Int

}

deriving Show

{- | the actual development graph with auxiliary information. A

'G_sign' should be stored in 'sigMap' under its 'gSignSelfIdx'. The

same applies to 'G_morphism' with 'morMap' and 'gMorphismSelfIdx'

resp. 'G_theory' with 'thMap' and 'gTheorySelfIdx'. -}

data DGraph = DGraph

{ globalAnnos :: GlobalAnnos -- ^ global annos of library

, globalEnv :: GlobalEnv -- ^ name entities (specs, views) of a library

, dgBody :: Tree.Gr DGNodeLab DGLinkLab -- ^ actual 'DGraph` tree

, refTree :: Tree.Gr RTNodeLab RTLinkLab -- ^ the refinement tree

, specRoots :: Map.Map String Node -- ^ root nodes for named specs

, archSpecDiags :: Map.Map String Diag

-- ^ dependency diagrams between units

, getNewEdgeId :: EdgeId -- ^ edge counter

, refNodes :: Map.Map Node (LibName, Node) -- ^ unexpanded 'DGRef's

, allRefNodes :: Map.Map (LibName, Node) Node -- ^ all DGRef's

, sigMap :: Map.Map SigId G_sign -- ^ signature map

, thMap :: Map.Map ThId G_theory -- ^ morphism map

, morMap :: Map.Map MorId G_morphism -- ^ theory map

, proofHistory :: ProofHistory -- ^ applied proof steps

, redoHistory :: ProofHistory -- ^ undone proofs steps

} deriving Show

emptyDG :: DGraph

emptyDG = DGraph

{ globalAnnos = emptyGlobalAnnos

, globalEnv = Map.empty

, dgBody = Graph.empty

, refTree = Graph.empty

, specRoots = Map.empty

, archSpecDiags = Map.empty

, getNewEdgeId = startEdgeId

, refNodes = Map.empty

, allRefNodes = Map.empty

, sigMap = Map.empty

, thMap = Map.empty

, morMap = Map.empty

, proofHistory = SizedList.empty

, redoHistory = SizedList.empty }

type LibEnv = Map.Map LibName DGraph

-- | an empty environment

emptyLibEnv :: LibEnv

emptyLibEnv = Map.empty

-- * utility functions

-- ** for node signatures

emptyG_sign :: AnyLogic -> G_sign

emptyG_sign (Logic lid) = G_sign lid (ext_empty_signature lid) startSigId

getMaybeSig :: MaybeNode -> G_sign

getMaybeSig (JustNode ns) = getSig ns

getMaybeSig (EmptyNode l) = emptyG_sign l

getLogic :: MaybeNode -> AnyLogic

getLogic (JustNode ns) = getNodeLogic ns

getLogic (EmptyNode l) = l

getNodeLogic :: NodeSig -> AnyLogic

getNodeLogic (NodeSig _ (G_sign lid _ _)) = Logic lid

-- ** for node names

emptyNodeName :: NodeName

emptyNodeName = NodeName (mkSimpleId "") "" 0 []

showExt :: NodeName -> String

showExt n = let i = extIndex n in extString n ++ if i == 0 then "" else show i

showName :: NodeName -> String

showName n = let ext = showExt n in

tokStr (getName n) ++ if null ext then ext else "__" ++ ext

makeName :: SIMPLE_ID -> NodeName

makeName n = NodeName n "" 0 [ElemName $ tokStr n]

parseNodeName :: String -> NodeName

parseNodeName s = case splitByList "__" s of

[i] ->

makeName $ mkSimpleId i

[i, e] ->

let n = makeName $ mkSimpleId i

mSf = numberSuffix e

(es, sf) = fromMaybe (e, 0) mSf

in n { extString = es

, extIndex = sf }

_ ->

error

$ "parseNodeName: malformed NodeName, too many __: "

++ s

incBy :: Int -> NodeName -> NodeName

incBy i n = n

{ extIndex = extIndex n + i

, xpath = case xpath n of

ChildIndex j : r -> ChildIndex (j + i) : r

l -> ChildIndex i : l }

inc :: NodeName -> NodeName

inc = incBy 1

extName :: String -> NodeName -> NodeName

extName s n = n

{ extString = showExt n ++ take 1 s

, extIndex = 0

, xpath = ElemName s : xpath n }

-- ** accessing node label

-- | get the origin of a non-reference node (partial)

dgn_origin :: DGNodeLab -> DGOrigin

dgn_origin = node_origin . nodeInfo

-- | get the referenced library (partial)

dgn_libname :: DGNodeLab -> LibName

dgn_libname = ref_libname . nodeInfo

-- | get the referenced node (partial)

dgn_node :: DGNodeLab -> Node

dgn_node = ref_node . nodeInfo

-- | get the signature of a node's theory (total)

dgn_sign :: DGNodeLab -> G_sign

dgn_sign dn = case dgn_theory dn of

G_theory lid sig ind _ _ -> G_sign lid sig ind

-- | gets the name of a development graph node as a string (total)

getDGNodeName :: DGNodeLab -> String

getDGNodeName = showName . dgn_name

-- | gets the name of a development graph link as a string (total)

getDGLinkName :: DGLinkLab -> String

getDGLinkName = showName . dglName

-- ** creating node content and label

-- | create default content

newNodeInfo :: DGOrigin -> DGNodeInfo

newNodeInfo orig = DGNode

{ node_origin = orig

, node_cons_status = mkConsStatus None }

-- | create a reference node part

newRefInfo :: LibName -> Node -> DGNodeInfo

newRefInfo ln n = DGRef

{ ref_libname = ln

, ref_node = n }

-- | create a new node label

newInfoNodeLab :: NodeName -> DGNodeInfo -> G_theory -> DGNodeLab

newInfoNodeLab name info gTh@(G_theory lid _ _ _ _) = DGNodeLab

{ dgn_name = name

, dgn_theory = gTh

, globalTheory = Nothing

, labelHasHiding = False

, labelHasFree = False

, dgn_nf = Nothing

, dgn_sigma = Nothing

, dgn_freenf = Nothing

, dgn_phi = Nothing

, nodeInfo = info

, dgn_lock = Nothing

, dgn_symbolpathlist = G_symbolmap lid Map.empty }

-- | create a new node label using 'newNodeInfo' and 'newInfoNodeLab'

newNodeLab :: NodeName -> DGOrigin -> G_theory -> DGNodeLab

newNodeLab name = newInfoNodeLab name . newNodeInfo

-- ** handle the lock of a node

-- | wrapper to access the maybe lock

treatNodeLock :: (MVar () -> a) -> DGNodeLab -> a

treatNodeLock f = maybe (error "MVar not initialised") f . dgn_lock

-- | Tries to acquire the local lock. Return False if already acquired.

tryLockLocal :: DGNodeLab -> IO Bool

tryLockLocal = treatNodeLock $ flip tryPutMVar ()

-- | Releases the local lock.

unlockLocal :: DGNodeLab -> IO ()

unlockLocal = treatNodeLock $ \ lock ->

tryTakeMVar lock >>= maybe (error "Local lock wasn't locked.") return

-- | checks if locking MVar is initialized

hasLock :: DGNodeLab -> Bool

hasLock = isJust . dgn_lock

-- ** handle edge numbers and proof bases

-- | create a default ID which has to be changed when inserting a certain edge.

defaultEdgeId :: EdgeId

defaultEdgeId = EdgeId (-1)

emptyProofBasis :: ProofBasis

emptyProofBasis = ProofBasis Set.empty

nullProofBasis :: ProofBasis -> Bool

nullProofBasis = Set.null . proofBasis

addEdgeId :: ProofBasis -> EdgeId -> ProofBasis

addEdgeId (ProofBasis s) e = ProofBasis $ Set.insert e s

-- | checks if the given edge is contained in the given proof basis..

roughElem :: LEdge DGLinkLab -> ProofBasis -> Bool

roughElem (_, _, label) = Set.member (dgl_id label) . proofBasis

-- ** edge label equalities

-- | equality without comparing the edge ids

eqDGLinkLabContent :: DGLinkLab -> DGLinkLab -> Bool

eqDGLinkLabContent l1 l2 = let

i1 = dgl_id l1

i2 = dgl_id l2

in if i1 <= defaultEdgeId || i2 <= defaultEdgeId then

dgl_morphism l1 == dgl_morphism l2

&& dgl_type l1 == dgl_type l2

&& dgl_origin l1 == dgl_origin l2

&& dglName l1 == dglName l2

else let r = eqDGLinkLabContent l1 l2 { dgl_id = defaultEdgeId}

s = i1 == i2

in assert (r == s) s

-- | equality comparing ids only

eqDGLinkLabById :: DGLinkLab -> DGLinkLab -> Bool

eqDGLinkLabById l1 l2 = let

i1 = dgl_id l1

i2 = dgl_id l2

in if i1 > defaultEdgeId && i2 > defaultEdgeId then i1 == i2 else

error "eqDGLinkLabById"

-- ** setting index maps

{- these index maps should be global for all libraries,

therefore their contents need to be copied -}

cpIndexMaps :: DGraph -> DGraph -> DGraph

cpIndexMaps from to =

to { sigMap = sigMap from

, thMap = thMap from

, morMap = morMap from }

setSigMapDG :: Map.Map SigId G_sign -> DGraph -> DGraph

setSigMapDG m dg = dg { sigMap = m }

setThMapDG :: Map.Map ThId G_theory -> DGraph -> DGraph

setThMapDG m dg = dg { thMap = m }

setMorMapDG :: Map.Map MorId G_morphism -> DGraph -> DGraph

setMorMapDG m dg = dg { morMap = m }

-- ** looking up in index maps

lookupSigMapDG :: SigId -> DGraph -> Maybe G_sign

lookupSigMapDG i = Map.lookup i . sigMap

lookupThMapDG :: ThId -> DGraph -> Maybe G_theory

lookupThMapDG i = Map.lookup i . thMap

lookupMorMapDG :: MorId -> DGraph -> Maybe G_morphism

lookupMorMapDG i = Map.lookup i . morMap

-- ** getting index maps and their maximal index

getMapAndMaxIndex :: Ord k => k -> (b -> Map.Map k a) -> b -> (Map.Map k a, k)

getMapAndMaxIndex c f gctx =

let m = f gctx in (m, if Map.null m then c else fst $ Map.findMax m)

sigMapI :: DGraph -> (Map.Map SigId G_sign, SigId)

sigMapI = getMapAndMaxIndex startSigId sigMap

thMapI :: DGraph -> (Map.Map ThId G_theory, ThId)

thMapI = getMapAndMaxIndex startThId thMap

morMapI :: DGraph -> (Map.Map MorId G_morphism, MorId)

morMapI = getMapAndMaxIndex startMorId morMap

-- ** lookup other graph parts

lookupGlobalEnvDG :: SIMPLE_ID -> DGraph -> Maybe GlobalEntry

lookupGlobalEnvDG sid = Map.lookup sid . globalEnv

-- | lookup a referenced library and node of a given reference node

lookupInRefNodesDG :: Node -> DGraph -> Maybe (LibName, Node)

lookupInRefNodesDG n = Map.lookup n . refNodes

-- | lookup a reference node for a given libname and node

lookupInAllRefNodesDG :: DGNodeInfo -> DGraph -> Maybe Node

lookupInAllRefNodesDG ref dg = case ref of

DGRef { ref_libname = libn, ref_node = refn } ->

Map.lookup (libn, refn) $ allRefNodes dg

_ -> Nothing

-- ** lookup nodes by their names or other properties

-- | lookup a node in the graph with a predicate.

lookupNodeWith :: (LNode DGNodeLab -> Bool) -> DGraph -> [LNode DGNodeLab]

lookupNodeWith f dg = filter f $ labNodesDG dg

-- | lookup a node in the graph by its name, using showName

-- to convert nodenames. See also 'getDGNodesByName'.

lookupNodeByName :: String -> DGraph -> [LNode DGNodeLab]

lookupNodeByName s dg = lookupNodeWith f dg where

f (_, lbl) = getDGNodeName lbl == s

-- | lookup a local node in the graph by its name, using showName

-- to convert nodenames. See also 'lookupNodeByName'.

lookupLocalNodeByName :: String -> DGraph -> [LNode DGNodeLab]

lookupLocalNodeByName s dg = lookupNodeWith f dg where

f (_, lbl) = not (isDGRef lbl) && getDGNodeName lbl == s

-- | lookup a local node in the graph by its name, using showName

-- to convert nodenames. See also 'lookupNodeByName'.

lookupRefNodeByName :: String -> LibName -> DGraph -> [LNode DGNodeLab]

lookupRefNodeByName s ln dg = lookupNodeWith f dg where

f (_, lbl) = case nodeInfo lbl of

DGRef { ref_libname = libn } ->

libn == ln && getDGNodeName lbl == s

_ -> False

-- ** treat reference nodes

-- | add a new referenced node into the refNodes map of the given DG

addToRefNodesDG :: Node -> DGNodeInfo -> DGraph -> DGraph

addToRefNodesDG n ref dg = case ref of

DGRef { ref_libname = libn, ref_node = refn } ->

dg { refNodes = Map.insert n (libn, refn) $ refNodes dg

, allRefNodes = Map.insert (libn, refn) n $ allRefNodes dg }

_ -> dg

-- | delete the given referenced node out of the refnodes map

deleteFromRefNodesDG :: Node -> DGraph -> DGraph

deleteFromRefNodesDG n dg = dg { refNodes = Map.delete n $ refNodes dg }

-- ** accessing the actual graph

-- | get the next available node id

getNewNodeDG :: DGraph -> Node

getNewNodeDG = Tree.getNewNode . dgBody

-- | get all the nodes

labNodesDG :: DGraph -> [LNode DGNodeLab]

labNodesDG = labNodes . dgBody

-- | get all the edges

labEdgesDG :: DGraph -> [LEdge DGLinkLab]

labEdgesDG = labEdges . dgBody

-- | checks if a DG is empty or not.

isEmptyDG :: DGraph -> Bool

isEmptyDG = isEmpty . dgBody

-- | checks if a given node belongs to a given DG

gelemDG :: Node -> DGraph -> Bool

gelemDG n = gelem n . dgBody

-- | get all the incoming ledges of the given node in a given DG

innDG :: DGraph -> Node -> [LEdge DGLinkLab]

innDG = inn . dgBody

-- | get all the outgoing ledges of the given node in a given DG

outDG :: DGraph -> Node -> [LEdge DGLinkLab]

outDG = out . dgBody

-- | get all the nodes of the given DG

nodesDG :: DGraph -> [Node]

nodesDG = nodes . dgBody

-- | tries to get the label of the given node in a given DG

labDG :: DGraph -> Node -> DGNodeLab

labDG dg = fromMaybe (error "labDG") . lab (dgBody dg)

-- | get the name of a node from the number of node

getNameOfNode :: Node -> DGraph -> String

getNameOfNode index gc = getDGNodeName $ labDG gc index

-- | gets the given number of new node-ids in a given DG.

newNodesDG :: Int -> DGraph -> [Node]

newNodesDG n = newNodes n . dgBody

-- | get the context and throw input string as error message

safeContextDG :: String -> DGraph -> Node -> Context DGNodeLab DGLinkLab

safeContextDG s = safeContext s . dgBody where

safeContext err g v = -- same as context with extra message

fromMaybe (error $ err ++ ": Match Exception, Node: " ++ show v)

. fst $ match v g

-- ** manipulate graph

-- | sets the node with new label and returns the new graph and the old label

labelNodeDG :: LNode DGNodeLab -> DGraph -> (DGraph, DGNodeLab)

labelNodeDG p g =

let (b, l) = Tree.labelNode p $ dgBody g in (g { dgBody = b }, l)

-- | delete the node out of the given DG

delNodeDG :: Node -> DGraph -> DGraph

delNodeDG n dg = dg { dgBody = delNode n $ dgBody dg }

-- | delete the LNode out of the given DG

delLNodeDG :: LNode DGNodeLab -> DGraph -> DGraph

delLNodeDG n dg = dg { dgBody = Tree.delLNode (==) n $ dgBody dg }

-- | delete a list of nodes out of the given DG

delNodesDG :: [Node] -> DGraph -> DGraph

delNodesDG ns dg = dg { dgBody = delNodes ns $ dgBody dg }

-- | insert a new node into given DGraph

insNodeDG :: LNode DGNodeLab -> DGraph -> DGraph

insNodeDG n dg = dg { dgBody = insNode n $ dgBody dg }

-- | inserts a lnode into a given DG

insLNodeDG :: LNode DGNodeLab -> DGraph -> DGraph

insLNodeDG n@(v, _) g =

if gelemDG v g then error $ "insLNodeDG " ++ show v else insNodeDG n g

-- | insert a new node with the given node content into a given DGraph

insNodesDG :: [LNode DGNodeLab] -> DGraph -> DGraph

insNodesDG ns dg = dg { dgBody = insNodes ns $ dgBody dg }

-- | delete a labeled edge out of the given DG

delLEdgeDG :: LEdge DGLinkLab -> DGraph -> DGraph

delLEdgeDG e g = g

{ dgBody = Tree.delLEdge (\ l1 l2 -> compare (dgl_id l1) $ dgl_id l2) e

$ dgBody g }

-- | insert a labeled edge into a given DG, return possibly new id of edge

insLEdgeDG :: LEdge DGLinkLab -> DGraph -> (LEdge DGLinkLab, DGraph)

insLEdgeDG (s, t, l) g =

let eId = dgl_id l

nId = getNewEdgeId g

newId = eId == defaultEdgeId

e = (s, t, if newId then l { dgl_id = nId } else l)

in (e, g

{ getNewEdgeId = if newId then succ nId else max nId $ succ eId

, dgBody = fst $ Tree.insLEdge True (\ l1 l2 ->

if eqDGLinkLabContent l1 { dgl_id = defaultEdgeId } l2

then EQ else compare (dgl_id l1) $ dgl_id l2) e $ dgBody g })

{- | tries to insert a labeled edge into a given DG, but if this edge

already exists, then does nothing. -}

insLEdgeNubDG :: LEdge DGLinkLab -> DGraph -> DGraph

insLEdgeNubDG (v, w, l) g =

let oldEdgeId = getNewEdgeId g

(ng, change) = Tree.insLEdge False (\ l1 l2 ->

if eqDGLinkLabContent l1 { dgl_id = defaultEdgeId } l2

then EQ else compare (dgl_id l1) $ dgl_id l2)

(v, w, l { dgl_id = oldEdgeId }) $ dgBody g

in

g { getNewEdgeId = if change then succ oldEdgeId else oldEdgeId

, dgBody = ng }

{- | insert an edge into the given DGraph, which updates

the graph body and the edge counter as well. -}

insEdgeDG :: LEdge DGLinkLab -> DGraph -> DGraph

insEdgeDG l oldDG =

oldDG { dgBody = insEdge l $ dgBody oldDG

, getNewEdgeId = succ $ getNewEdgeId oldDG }

-- | insert a list of labeled edge into a given DG

insEdgesDG :: [LEdge DGLinkLab] -> DGraph -> DGraph

insEdgesDG = flip $ foldr insLEdgeNubDG

-- | merge a list of lnodes and ledges into a given DG

mkGraphDG :: [LNode DGNodeLab] -> [LEdge DGLinkLab] -> DGraph -> DGraph

mkGraphDG ns ls = insEdgesDG ls . insNodesDG ns

-- | get nodes by name

getDGNodesByName :: (NodeName -> Bool) -> DGraph -> [LNode DGNodeLab]

getDGNodesByName p = filter (p . dgn_name . snd) . labNodesDG

-- | get links by name (inefficiently)

getDGLinksByName :: (NodeName -> Bool) -> DGraph -> [LEdge DGLinkLab]

getDGLinksByName p = filter (\ (_, _, l) -> p $ dglName l) . labEdgesDG

-- ** top-level functions

-- | initializes the MVar for locking if nessesary

initLocking :: DGraph -> LNode DGNodeLab -> IO (DGraph, DGNodeLab)

initLocking dg (node, dgn) = do

lock <- newEmptyMVar

let dgn' = dgn { dgn_lock = Just lock }

return (fst $ labelNodeDG (node, dgn') dg, dgn')

-- | returns the DGraph that belongs to the given library name

lookupDGraph :: LibName -> LibEnv -> DGraph

lookupDGraph ln = Map.findWithDefault (error $ "lookupDGraph " ++ show ln) ln

{- | compute the theory of a given node.

If this node is a DGRef, the referenced node is looked up first. -}

computeLocalTheory :: Monad m => LibEnv -> LibName -> Node -> m G_theory

computeLocalTheory libEnv ln =

computeLocalNodeTheory libEnv $ lookupDGraph ln libEnv

computeLocalNodeTheory :: Monad m => LibEnv -> DGraph -> Node -> m G_theory

computeLocalNodeTheory libEnv dg = computeLocalLabelTheory libEnv . labDG dg

computeLocalLabelTheory :: Monad m => LibEnv -> DGNodeLab -> m G_theory

computeLocalLabelTheory libEnv nodeLab =

if isDGRef nodeLab

then

computeLocalTheory libEnv (dgn_libname nodeLab) $ dgn_node nodeLab

else return $ dgn_theory nodeLab

-- ** test link types

liftE :: (DGLinkType -> Bool) -> LEdge DGLinkLab -> Bool

liftE f (_, _, edgeLab) = f $ dgl_type edgeLab

-- | or two predicates

liftOr :: (a -> Bool) -> (a -> Bool) -> a -> Bool

liftOr f g x = f x || g x

isGlobalDef :: DGLinkType -> Bool

isGlobalDef lt = case lt of

ScopedLink Global DefLink _ -> True

_ -> False

isLocalDef :: DGLinkType -> Bool

isLocalDef lt = case lt of

ScopedLink Local DefLink _ -> True

_ -> False

isHidingDef :: DGLinkType -> Bool

isHidingDef lt = case lt of

HidingDefLink -> True

_ -> False

isDefEdge :: DGLinkType -> Bool

isDefEdge edge = case edge of

ScopedLink _ DefLink _ -> True

HidingDefLink -> True

FreeOrCofreeDefLink _ _ -> True

_ -> False

isLocalEdge :: DGLinkType -> Bool

isLocalEdge edge = case edge of

ScopedLink Local _ _ -> True

_ -> False

isHidingEdge :: DGLinkType -> Bool

isHidingEdge edge = case edge of

HidingDefLink -> True

HidingFreeOrCofreeThm Nothing _ _ -> True

_ -> False

-- ** create link types

hidingThm :: GMorphism -> DGLinkType

hidingThm m = HidingFreeOrCofreeThm Nothing m LeftOpen

globalThm :: DGLinkType

globalThm = localOrGlobalThm Global None

localThm :: DGLinkType

localThm = localOrGlobalThm Local None

globalConsThm :: Conservativity -> DGLinkType

globalConsThm = localOrGlobalThm Global

localConsThm :: Conservativity -> DGLinkType

localConsThm = localOrGlobalThm Local

localOrGlobalThm :: Scope -> Conservativity -> DGLinkType

localOrGlobalThm sc = ScopedLink sc (ThmLink LeftOpen) . mkConsStatus

localOrGlobalDef :: Scope -> Conservativity -> DGLinkType

localOrGlobalDef sc = ScopedLink sc DefLink . mkConsStatus

globalConsDef :: Conservativity -> DGLinkType

globalConsDef = localOrGlobalDef Global

globalDef :: DGLinkType

globalDef = localOrGlobalDef Global None

localDef :: DGLinkType

localDef = localOrGlobalDef Local None

-- ** link conservativity

getLinkConsStatus :: DGLinkType -> ConsStatus

getLinkConsStatus lt = case lt of

ScopedLink _ _ c -> c

_ -> mkConsStatus None

getCons :: DGLinkType -> Conservativity

getCons lt = case getLinkConsStatus lt of

ConsStatus cons _ _ -> cons

-- | returns the Conservativity if the given edge has one, otherwise none

getConservativity :: LEdge DGLinkLab -> Conservativity

getConservativity (_, _, edgeLab) = getCons $ dgl_type edgeLab

-- | returns the conservativity of the given path

getConservativityOfPath :: [LEdge DGLinkLab] -> Conservativity

getConservativityOfPath path = minimum [getConservativity e | e <- path]

-- * bottom up traversal

-- | Creates a LibName relation wrt dependencies via reference nodes

getLibDepRel :: LibEnv -> Rel.Rel LibName

getLibDepRel = Rel.transClosure

. Rel.fromSet . Map.foldWithKey (\ ln dg s ->

foldr ((\ x -> if isDGRef x then Set.insert (ln, dgn_libname x) else id)

. snd) s $ labNodesDG dg) Set.empty

topsortedLibsWithImports :: Rel.Rel LibName -> [LibName]

topsortedLibsWithImports = concatMap Set.toList . Rel.topSort

getTopsortedLibs :: LibEnv -> [LibName]

getTopsortedLibs le = let

rel = getLibDepRel le

ls = reverse $ topsortedLibsWithImports rel

restLs = Set.toList $ Set.difference (Map.keysSet le) $ Rel.nodes rel

in ls ++ restLs

{- | Get imported libs in topological order, i.e. lib(s) without imports first.

The input lib-name will be last -}

dependentLibs :: LibName -> LibEnv -> [LibName]

dependentLibs ln le =

let rel = getLibDepRel le

ts = topsortedLibsWithImports rel

is = Set.toList (Rel.succs rel ln)

in reverse $ ln : intersect ts is

topsortedNodes :: DGraph -> [LNode DGNodeLab]

topsortedNodes dgraph = let dg = dgBody dgraph in

reverse $ postorderF $ dffWith (\ (_, n, nl, _) -> (n, nl)) (nodes dg)

$ efilter (\ (s, t, el) -> s /= t && isDefEdge (dgl_type el)) dg

changedPendingEdges :: DGraph -> [LEdge DGLinkLab]

changedPendingEdges dg = let

ls = filter (liftE $ not . isDefEdge) $ labEdgesDG dg

(ms, ps) = foldr (\ (s, t, l) (m, es) ->

let b = dglPending l

e = dgl_id l

in (Map.insert e

(b, s, t,

maybe Set.empty (\ ts -> case ts of

LeftOpen -> Set.empty

Proven _ pb -> proofBasis pb) . thmLinkStatus $ dgl_type l) m

, if b && isLocalEdge (dgl_type l) then Set.insert e es else es))

(Map.empty, Set.empty) ls

close known =

let nxt = Map.keysSet $ Map.filter

(\ (_, _, _, s) -> not $ Set.null $ Set.intersection s known)

ms

new = Set.union nxt known

in if new == known then new else close new

aPs = close ps

in filter (\ (_, _, l) -> dglPending l /= Set.member (dgl_id l) aPs) ls

changedLocalTheorems :: DGraph -> LNode DGNodeLab -> [LEdge DGLinkLab]

changedLocalTheorems dg (v, lbl) =

case dgn_theory lbl of

G_theory _ _ _ sens _ ->

foldr (\ e@(_, _, el) l ->

let pend = dglPending el

psens = Map.keysSet $ OMap.filter isProvenSenStatus sens

in case thmLinkStatus $ dgl_type el of

Just (Proven (DGRuleLocalInference nms) _) | pend

== Set.isSubsetOf (Set.fromList $ map snd nms) psens -> e : l

_ -> l

) []

$ filter (liftE $ \ e -> isLocalEdge e && not (isLocalDef e))

$ innDG dg v

duplicateDefEdges :: DGraph -> [Edge]

duplicateDefEdges = concat .

filter (not . isSingle) . group . map (\ (s, t, _) -> (s, t))

. filter (liftE isDefEdge) . labEdgesDG