{- |

Module : $Header$

Copyright : (c) Till Mossakowski and Uni Bremen 2003

Licence : similar to LGPL, see HetCATS/LICENCE.txt or LIZENZ.txt

Maintainer : till@tzi.de

Stability : provisional

Portability : portable

Analysis of structured specifications

Follows the verfication semantic rules in Chap. IV:4.7

of the CASL Reference Manual.

-}

{-

Todo:

analysis of basic specs: use union of sigs

analysis of instantiations: if necessary, translate body along inclusion comorphism

Improve efficiency by storing local signature fragments only

Name views in devgraphs?

spec <name> not found: line number!

Issue warning for unions of non-disjoint signatures

(and offer tool for renaming?)

Check that translations and reductions do not effect local env

(Implement new semantics for revealing here)

Should we use institution independent analysis over the Grothendieck logic?

abstract syntax + devgraph would have to be changed to homogeneous case

logic translations are symbol maps in the Grothendieck logic

Problem with this approach: symbol functor goes into rel,

and induced_from_morphism gets difficult to implement

Unions need inclusion morphisms. Should these play a special role?

At least we need a function delivering the inclusion morphism

between two (sub)signatures.

In most logics, inclusions could be represented specially, such

that composition for them becomes fast.

Should we even identify an inclusion subcategory?

Then inclusions are represented by pair of signatures

(Non-inclusions could be specially displayed in the DG)

No optimization of heterogeneous unions!

(or use heterogeneous compInclusion in Proofs/Proof.hs)

Treatment of translations and reductions along logic translations

(see WADT 02 paper).

Open question:

may local env be translated, and even reduced, along logic translations?

if yes: how is local env linked to signature of resulting spec?

(important e.g. for checking that local env is not being renamed?)

does signature+comorphism suffice, such that c(local env)\subseteq sig?

if no: this means that only closed specs may be translated

Revealings without translations: just one arrow

Pushouts: only admissible within one logic?

Instantiations with formal parameter: add no new internal nodes

call extend_morphism

Optimizations:

Union nodes can be extended by a basic spec directly (no new node needed)

no new nodes for trivial translations

use foldM

Also: free, cofree nodes

Basic specs: if local env node is otherwise unused, overwrite it with

local sig+axioms

Ensure that just_struct option leads to disabling of various dg operations

(show sig, show mor, proving)

local: better error message for the following

spec GenCardinality [sort Subject,Object;

pred predicate : Subject * Object] =

%%Nat then

local {

Set [sort Object fit sort Elem |-> Object]

reveal Set[Object], #__, __eps__,

Nat,0,1,2,3,4,5,6,7,8,9,__@@__,__>=__,__<=__

then

op toSet : Subject -> Set [Object]

forall x : Subject; y : Object

. predicate (x,y) <=> y eps toSet(x)

} within

pred minCardinality(s: Subject;n: Nat) <=>

# toSet(s) >= n;

maxCardinality(s: Subject;n: Nat) <=>

# toSet(s) <= n;

cardinality(s: Subject;n: Nat) <=>

# toSet(s) = n

%%} hide Pos,toSet,Set[Object],#__,__eps__,__<=__,__>=__

end

-}

module Static.AnalysisStructured (ana_SPEC, ana_GENERICITY,

ana_VIEW_TYPE, ana_err, isStructured,

ana_RENAMING, ana_RESTRICTION,

extendMorphism)

where

import Driver.Options

import Data.Maybe

import Logic.Logic

import Logic.Comorphism

import Logic.Grothendieck

import Static.DevGraph

import Syntax.AS_Structured

import Common.AS_Annotation

import Common.Result

import Common.Id

import Data.Graph.Inductive.Graph

import qualified Common.Lib.Set as Set

import qualified Common.Lib.Map as Map

import qualified Common.Lib.Rel as Rel(image, setInsert)

import Data.List hiding (union)

import Common.PrettyPrint

import Common.Lib.Pretty

import Control.Monad

insEdgeNub :: LEdge DGLinkLab -> DGraph -> DGraph

insEdgeNub e@(v,w,l) g =

if (l,w) `elem` s then g

else insEdge e g

where (Just (_,_,_,s),_) = match v g

-- | analyze a SPEC

-- Parameters: global context, local environment,

-- the SIMPLE_ID may be a name if the specification shall be named,

-- options: here we need the info: shall only the structure be analysed?

ana_SPEC :: LogicGraph -> GlobalContext -> NodeSig -> NODE_NAME ->

HetcatsOpts -> SPEC -> Result (SPEC,NodeSig,DGraph)

ana_SPEC lg gctx@(gannos,genv,dg) nsig name opts sp =

case sp of

Basic_spec (G_basic_spec lid bspec) ->

do G_sign lid' sigma' <- return (getSig nsig)

sigma <- mcoerce lid' lid "Analysis of basic spec" sigma'

(bspec', _sigma_local, sigma_complete, ax) <-

if isStructured opts

then return (bspec,empty_signature lid, empty_signature lid,[])

else do b <- maybeToMonad

("no basic analysis for logic "

++language_name lid)

(basic_analysis lid)

b (bspec,sigma,gannos)

incl <- ginclusion lg

(G_sign lid sigma) (G_sign lid sigma_complete)

let node_contents = DGNode {

dgn_name = name,

dgn_sign = G_sign lid sigma_complete, -- no, not only the delta

dgn_sens = G_l_sentence_list lid ax,

dgn_nf = Nothing,

dgn_sigma = Nothing,

dgn_origin = DGBasic }

node = getNewNode dg

dg' = insNode (node,node_contents) dg

link = DGLink {

dgl_morphism = incl,

dgl_type = GlobalDef,

dgl_origin = DGExtension }

dg'' = case nsig of

EmptyNode _ -> dg'

NodeSig (n,_) -> insEdgeNub (n,node,link) dg'

return (Basic_spec (G_basic_spec lid bspec'),

NodeSig (node,G_sign lid sigma_complete),

dg'')

Translation asp ren ->

do let sp1 = item asp

(sp1',nsig',dg') <- ana_SPEC lg gctx nsig (inc name) opts sp1

n' <- maybeToMonad

"Internal error: Translation of empty spec" (getNode nsig')

let gsigma = getSig nsig'

mor <- ana_RENAMING lg gsigma opts ren

-- ??? check that mor is identity on local env

let gsigma' = cod Grothendieck mor

-- ??? too simplistic for non-comorphism inter-logic translations

G_sign lid' _ <- return gsigma'

let node_contents = DGNode {

dgn_name = name,

dgn_sign = gsigma',

dgn_sens = G_l_sentence_list lid' [],

dgn_nf = Nothing,

dgn_sigma = Nothing,

dgn_origin = DGTranslation }

node = getNewNode dg'

link = (n',node,DGLink {

dgl_morphism = mor,

dgl_type = GlobalDef,

dgl_origin = DGTranslation })

return (Translation (replaceAnnoted sp1' asp) ren,

NodeSig(node,gsigma'),

insEdgeNub link $

insNode (node,node_contents) dg')

Reduction asp restr ->

do let sp1 = item asp

(sp1',nsig',dg') <- ana_SPEC lg gctx nsig (inc name) opts sp1

let gsigma = getSig nsig

gsigma' = getSig nsig'

n' <- maybeToMonad

"Internal error: Reduction of empty spec" (getNode nsig')

(hmor,tmor) <- ana_RESTRICTION dg gsigma gsigma' opts restr

-- we treat hiding and revealing differently

-- in order to keep the dg as simple as possible

case tmor of

Nothing ->

do let gsigma'' = dom Grothendieck hmor

-- ??? too simplistic for non-comorphism inter-logic reductions

G_sign lid' _ <- return gsigma''

let node_contents = DGNode {

dgn_name = name,

dgn_sign = gsigma'', -- G_sign lid' (empty_signature lid'),

dgn_sens = G_l_sentence_list lid' [],

dgn_nf = Nothing,

dgn_sigma = Nothing,

dgn_origin = DGHiding }

node = getNewNode dg'

link = (n',node,DGLink {

dgl_morphism = hmor,

dgl_type = HidingDef,

dgl_origin = DGHiding })

return (Reduction (replaceAnnoted sp1' asp) restr,

NodeSig(node,gsigma''),

insEdgeNub link $

insNode (node,node_contents) dg')

Just tmor' -> do

let gsigma1 = dom Grothendieck tmor'

gsigma'' = cod Grothendieck tmor'

-- ??? too simplistic for non-comorphism inter-logic reductions

G_sign lid1 _ <- return gsigma1

G_sign lid'' _ <- return gsigma''

-- the case with identity translation leads to a simpler dg

if tmor' == ide Grothendieck (dom Grothendieck tmor')

then do

let node1 = getNewNode dg'

node_contents1 = DGNode {

dgn_name = name,

dgn_sign = gsigma1, --G_sign lid1 (empty_signature lid1),

dgn_sens = G_l_sentence_list lid1 [],

dgn_nf = Nothing,

dgn_sigma = Nothing,

dgn_origin = DGRevealing }

link1 = (n',node1,DGLink {

dgl_morphism = hmor,

dgl_type = HidingDef,

dgl_origin = DGRevealing })

return (Reduction (replaceAnnoted sp1' asp) restr,

NodeSig(node1,gsigma1),

insEdgeNub link1 $

insNode (node1,node_contents1) dg')

else do

let [node1,node''] = newNodes 2 dg'

node_contents1 = DGNode {

dgn_name = extName "T" name,

dgn_sign = gsigma1, --G_sign lid1 (empty_signature lid1),

dgn_sens = G_l_sentence_list lid1 [],

dgn_nf = Nothing,

dgn_sigma = Nothing,

dgn_origin = DGRevealing }

link1 = (n',node1,DGLink {

dgl_morphism = hmor,

dgl_type = HidingDef,

dgl_origin = DGRevealing })

node_contents'' = DGNode {

dgn_name = name,

dgn_sign = gsigma'', -- G_sign lid'' (empty_signature lid''),

dgn_sens = G_l_sentence_list lid'' [],

dgn_nf = Nothing,

dgn_sigma = Nothing,

dgn_origin = DGRevealTranslation }

link'' = (node1,node'',DGLink {

dgl_morphism = tmor',

dgl_type = GlobalDef,

dgl_origin = DGRevealTranslation })

return (Reduction (replaceAnnoted sp1' asp) restr,

NodeSig(node'',gsigma''),

insEdgeNub link'' $

insNode (node'',node_contents'') $

insEdgeNub link1 $

insNode (node1,node_contents1) dg')

Union [] _ -> return (sp,nsig,dg)

Union asps pos ->

do let sps = map item asps

(sps',nsigs,dg',_) <-

let ana r sp' = do

(sps1,nsigs,dg',n) <- r

(sp1,nsig',dg1) <- ana_SPEC lg (gannos,genv,dg')

nsig n opts sp'

return (sp1:sps1,nsig':nsigs,dg1,inc n)

in foldl ana (return ([],[],dg,extName "U" name)) sps

let nsigs' = reverse nsigs

adj = adjustPos pos

gbigSigma <- adj $ gsigManyUnion lg (map getSig nsigs')

G_sign lid' _ <- return gbigSigma

let node_contents = DGNode {

dgn_name = name,

dgn_sign = gbigSigma, -- G_sign lid' (empty_signature lid'),

dgn_sens = G_l_sentence_list lid' [],

dgn_nf = Nothing,

dgn_sigma = Nothing,

dgn_origin = DGUnion }

node = getNewNode dg'

insE dgres (n,gsigma) = do

dg1 <- dgres

incl <- adj $ ginclusion lg gsigma gbigSigma

let link = DGLink {

dgl_morphism = incl,

dgl_type = GlobalDef,

dgl_origin = DGUnion }

return (insEdgeNub (n,node,link) dg1)

dg'' <- foldl insE (return (insNode (node,node_contents) dg'))

(catMaybes (map getNodeAndSig nsigs'))

return (Union (map (uncurry replaceAnnoted)

(zip (reverse sps') asps))

pos,

NodeSig(node,gbigSigma),

dg'')

--Extension [] pos -> return (sp,nsig,dg)

Extension asps pos -> do

(sps',nsig1,dg1) <- foldl ana (return ([],nsig,dg)) namedSps

return (Extension (map (uncurry replaceAnnoted)

(zip (reverse sps') asps))

pos,

nsig1,dg1)

where

namedSps = zip (reverse (name: tail (take (length asps)

(iterate inc (extName "E" name)))))

asps

ana res (name',asp') = do

(sps',nsig',dg') <- res

(sp1',nsig1,dg1) <-

ana_SPEC lg (gannos,genv,dg') nsig' name' opts (item asp')

-- insert theorem link for semantic annotations

-- take the first semantic annotation

let anno = find isSemanticAnno $ l_annos asp'

-- is the extension going between real nodes?

dg2 <- case (anno,getNode nsig',getNode nsig1) of

(Just anno0@(Semantic_anno anno1 _),Just n',Just n1) -> do

-- any other semantic annotation? that's an error

when (any (\an -> isSemanticAnno an && an/=anno0) $ l_annos asp')

(pplain_error () (ptext "Conflicting semantic annotations")

[])

-- %implied should not occur here

when (anno1==SA_implied)

(pplain_error () (ptext "Annotation %implied should come after a BASIC-ITEM")

[])

let sig1 = getSig nsig1

sig' = getSig nsig'

if anno1==SA_implies then do

when (not (is_subgsign sig1 sig')) (pplain_error ()

(ptext "Signature must not be extended in presence of %implies")

[])

-- insert a theorem link according to p. 319 of the CASL Reference Manual

return $ insEdgeNub (n1,n',DGLink {

dgl_morphism = ide Grothendieck sig1,

dgl_type = GlobalThm Open Cons Open,

dgl_origin = DGExtension }) dg1

else do

let anno2 = case anno1 of

SA_cons -> Cons

SA_def -> Def

SA_mono -> Mono

_ -> error "Static.AnalysisStructured: this cannot happen"

-- insert a theorem link according to p. 319 of the CASL Reference Manual

-- the theorem link is trivally proved by the parallel definition link,

-- but for clarity, we leave it open here

-- the interesting open proof obligation is anno2, of course

incl <- ginclusion lg sig' sig1

return $ insEdgeNub (n',n1,DGLink {

dgl_morphism = incl,

dgl_type = GlobalThm Open anno2 Open,

dgl_origin = DGExtension }) dg1

_ -> return dg1

return (sp1':sps',nsig1,dg2)

Free_spec asp poss ->

do let sp1 = item asp

(sp',nsig',dg') <- ana_SPEC lg gctx nsig (inc name) opts sp1

n' <- maybeToMonad

"Internal error: Free spec over empty spec" (getNode nsig')

let gsigma' = getSig nsig'

pos = poss

G_sign lid' _ <- return gsigma'

incl <- adjustPos pos $ ginclusion lg (getSig nsig) gsigma'

let node_contents = DGNode {

dgn_name = name,

dgn_sign = gsigma', -- G_sign lid' (empty_signature lid'), -- delta is empty

dgn_nf = Nothing,

dgn_sigma = Nothing,

dgn_sens = G_l_sentence_list lid' [],

dgn_origin = DGFree }

node = getNewNode dg'

link = (n',node,DGLink {

dgl_morphism = incl,

dgl_type = FreeDef nsig,

dgl_origin = DGFree })

return (Free_spec (replaceAnnoted sp' asp) poss,

NodeSig(node,gsigma'),

insEdgeNub link $

insNode (node,node_contents) dg')

Cofree_spec asp poss ->

do let sp1 = item asp

(sp',nsig',dg') <- ana_SPEC lg gctx nsig (inc name) opts sp1

n' <- maybeToMonad

"Internal error: Cofree spec over empty spec" (getNode nsig')

let gsigma' = getSig nsig'

pos = poss

G_sign lid' _ <- return gsigma'

incl <- adjustPos pos $ ginclusion lg (getSig nsig) gsigma'

let node_contents = DGNode {

dgn_name = name,

dgn_sign = gsigma', -- G_sign lid' (empty_signature lid'), -- delta is empty

dgn_sens = G_l_sentence_list lid' [],

dgn_nf = Nothing,

dgn_sigma = Nothing,

dgn_origin = DGCofree }

node = getNewNode dg'

link = (n',node,DGLink {

dgl_morphism = incl,

dgl_type = CofreeDef nsig,

dgl_origin = DGCofree })

return (Cofree_spec (replaceAnnoted sp' asp) poss,

NodeSig(node,gsigma'),

insEdgeNub link $

insNode (node,node_contents) dg')

Local_spec asp asp' poss ->

do let sp1 = item asp

sp1' = item asp'

(sp2,nsig',dg') <- ana_SPEC lg gctx nsig (extName "L" name) opts sp1

(sp2',nsig'',dg'') <- ana_SPEC lg (gannos,genv,dg') nsig' (inc name) opts sp1'

n'' <- maybeToMonad

"Internal error: Local spec over empty spec" (getNode nsig'')

let gsigma = getSig nsig

gsigma' = getSig nsig'

gsigma'' = getSig nsig''

G_sign lid sigma <- return gsigma

G_sign lid' sigma' <- return gsigma'

G_sign lid'' sigma'' <- return gsigma''

sigma1 <- mcoerce lid' lid "Analysis of local spec" sigma'

sigma2 <- mcoerce lid'' lid "Analysis of local spec" sigma''

let sys = sym_of lid sigma

sys1 = sym_of lid sigma1

sys2 = sym_of lid sigma2

pos = poss

mor3 <- if isStructured opts then return (ide lid sigma2)

else adjustPos pos $ cogenerated_sign lid

(sys1 `Set.difference` sys) sigma2

let sigma3 = dom lid mor3

-- gsigma2 = G_sign lid sigma2

gsigma3 = G_sign lid sigma3

sys3 = sym_of lid sigma3

when (not( isStructured opts ||

sys2 `Set.difference` sys1 `Set.isSubsetOf` sys3))

$ pplain_error () (text

"attempt to hide the following symbols from the local environment"

$$ printText ((sys2 `Set.difference` sys1) `Set.difference` sys3))

pos

let node_contents = DGNode {

dgn_name = name,

dgn_sign = gsigma3, -- G_sign lid (empty_signature lid), -- delta is empty

dgn_nf = Nothing,

dgn_sigma = Nothing,

dgn_sens = G_l_sentence_list lid [],

dgn_origin = DGLocal }

node = getNewNode dg''

link = (n'',node,DGLink {

dgl_morphism = gEmbed (G_morphism lid mor3),

dgl_type = HidingDef,

dgl_origin = DGLocal })

return (Local_spec (replaceAnnoted sp2 asp)

(replaceAnnoted sp2' asp')

poss,

NodeSig(node,gsigma3),

insEdgeNub link $

insNode (node,node_contents) dg'')

Closed_spec asp pos ->

do let sp1 = item asp

l = getLogic nsig

-- analyse spec with empty local env

(sp',nsig',dg') <- ana_SPEC lg gctx (EmptyNode l) (inc name) opts sp1

n' <- maybeToMonad

"Internal error: Closed spec over empty spec" (getNode nsig')

-- construct union with local env

let gsigma = getSig nsig

gsigma' = getSig nsig'

adj = adjustPos pos

gsigma'' <- adj $ gsigUnion lg gsigma gsigma'

G_sign lid'' _ <- return gsigma''

incl1 <- adj $ ginclusion lg gsigma gsigma''

incl2 <- adj $ ginclusion lg gsigma' gsigma''

let node = getNewNode dg'

node_contents = DGNode {

dgn_name = name,

dgn_sign = gsigma'', -- G_sign lid'' (empty_signature lid''),

dgn_sens = G_l_sentence_list lid'' [],

dgn_nf = Nothing,

dgn_sigma = Nothing,

dgn_origin = DGClosed }

link1 = DGLink {

dgl_morphism = incl1,

dgl_type = GlobalDef,

dgl_origin = DGClosedLenv }

link2 = (n',node,DGLink {

dgl_morphism = incl2,

dgl_type = GlobalDef,

dgl_origin = DGClosed })

insLink1 = case (getNode nsig) of

Nothing -> id

Just n -> insEdgeNub (n,node,link1)

return (Closed_spec (replaceAnnoted sp' asp) pos,

NodeSig(node,gsigma''),

insLink1 $

insEdgeNub link2 $

insNode (node,node_contents) dg')

Qualified_spec (Logic_name ln sublog) asp pos -> do

l <- lookupLogic "Static analysis: " (tokStr ln) lg

-- analyse spec with empty local env

(sp',nsig',dg') <- ana_SPEC lg gctx (EmptyNode l)

(inc name) opts (item asp)

n' <- maybeToMonad

"Internal error: Qualified spec over empty spec" (getNode nsig')

-- construct union with local env

let gsigma = getSig nsig

gsigma' = getSig nsig'

adj = adjustPos pos

gsigma'' <- adj $ gsigUnion lg gsigma gsigma'

G_sign lid'' _ <- return gsigma''

incl1 <- adj $ ginclusion lg gsigma gsigma''

incl2 <- adj $ ginclusion lg gsigma' gsigma''

let node = getNewNode dg'

node_contents = DGNode {

dgn_name = name,

dgn_sign = gsigma'', -- G_sign lid'' (empty_signature lid''),

dgn_sens = G_l_sentence_list lid'' [],

dgn_nf = Nothing,

dgn_sigma = Nothing,

dgn_origin = DGLogicQual }

link1 = DGLink {

dgl_morphism = incl1,

dgl_type = GlobalDef,

dgl_origin = DGLogicQualLenv }

link2 = (n',node,DGLink {

dgl_morphism = incl2,

dgl_type = GlobalDef,

dgl_origin = DGLogicQual })

insLink1 = case (getNode nsig) of

Nothing -> id

Just n -> insEdgeNub (n,node,link1)

return (Qualified_spec (Logic_name ln sublog) (replaceAnnoted sp' asp) pos,

NodeSig(node,gsigma''),

insLink1 $

insEdgeNub link2 $

insNode (node,node_contents) dg')

Group asp pos -> do

(sp',nsig',dg') <- ana_SPEC lg gctx nsig name opts (item asp)

return (Group (replaceAnnoted sp' asp) pos,nsig',dg')

Spec_inst spname afitargs pos -> do

let adj = adjustPos pos

case Map.lookup spname genv of

Nothing -> plain_error (sp,nsig,dg)

("Specification "++ showPretty spname " not found") pos

Just (ViewEntry _) ->

plain_error (sp,nsig,dg)

(showPretty spname " is a view, not a specification") pos

Just (ArchEntry _) ->

plain_error (sp,nsig,dg)

(showPretty spname

" is an architectural, not a structured specification") pos

Just (UnitEntry _) ->

plain_error (sp,nsig,dg)

(showPretty spname

" is a unit specification, not a structured specification") pos

Just (RefEntry) ->

plain_error (sp,nsig,dg)

(showPretty spname

" is a refinement specification, not a structured specification") pos

Just (SpecEntry gs@(imps,params,_,body)) ->

case (\x y -> (x,x-y)) (length afitargs) (length params) of

-- the case without parameters leads to a simpler dg

(0,0) -> do

let gsigmaB = getSig body

gsigma <- adj $ gsigUnion lg (getSig nsig) gsigmaB

G_sign lid _ <- return gsigma

nB <- adj $ maybeToMonad

"Internal error: empty body spec" (getNode body)

case (getNode nsig) of

-- the subcase with empty local env leads to an even simpler dg

Nothing ->

-- if the node shall not be named and the logic does not change,

if isInternal name && langNameSig gsigma==langNameSig gsigmaB

-- then just return the body

then return (sp,body,dg)

-- otherwise, we need to create a new one

else do

incl <- adj $ ginclusion lg gsigmaB gsigma

let node = getNewNode dg

node_contents = DGNode {

dgn_name = name,

dgn_sign = gsigma, -- G_sign lid (empty_signature lid),

dgn_sens = G_l_sentence_list lid [],

dgn_nf = Nothing,

dgn_sigma = Nothing,

dgn_origin = DGSpecInst spname}

link = (nB,node,DGLink {

dgl_morphism = incl,

dgl_type = GlobalDef,

dgl_origin = DGSpecInst spname})

return (sp,

NodeSig(node,gsigma),

insEdgeNub link $

insNode (node,node_contents) dg)

-- the subcase with nonempty local env

Just n -> do

incl1 <- adj $ ginclusion lg (getSig nsig) gsigma

incl2 <- adj $ ginclusion lg gsigmaB gsigma

let node = getNewNode dg

node_contents = DGNode {

dgn_name = name,

dgn_sign = gsigma, -- G_sign lid (empty_signature lid),

dgn_sens = G_l_sentence_list lid [],

dgn_nf = Nothing,

dgn_sigma = Nothing,

dgn_origin = DGSpecInst spname}

link1 = (n,node,DGLink {

dgl_morphism = incl1,

dgl_type = GlobalDef,

dgl_origin = DGSpecInst spname})

link2 = (nB,node,DGLink {

dgl_morphism = incl2,

dgl_type = GlobalDef,

dgl_origin = DGSpecInst spname})

return (sp,

NodeSig(node,gsigma),

insEdgeNub link1 $

insEdgeNub link2 $

insNode (node,node_contents) dg)

-- now the case with parameters

(_,0) -> do

let fitargs = map item afitargs

(fitargs',dg',args,_) <-

foldl anaFitArg (return ([],dg,[],extName "A" name))

(zip params fitargs)

let actualargs = reverse args

(gsigma',morDelta) <- adj $ apply_GS lg gs actualargs

gsigmaRes <- adj $ gsigUnion lg (getSig nsig) gsigma'

G_sign lidRes _ <- return gsigmaRes

nB <- adj $ maybeToMonad

"Internal error: empty body spec" (getNode body)

incl1 <- adj $ ginclusion lg (getSig nsig) gsigmaRes

incl2 <- adj $ ginclusion lg gsigma' gsigmaRes

morDelta' <- comp Grothendieck (gEmbed morDelta) incl2

let node = getNewNode dg'

node_contents = DGNode {

dgn_name = name,

dgn_sign = gsigmaRes, -- G_sign lid' (empty_signature lid'),

dgn_sens = G_l_sentence_list lidRes [],

dgn_nf = Nothing,

dgn_sigma = Nothing,

dgn_origin = DGSpecInst spname}

link1 = DGLink {

dgl_morphism = incl1,

dgl_type = GlobalDef,

dgl_origin = DGSpecInst spname}

insLink1 = case (getNode nsig) of

Nothing -> id

Just n -> insEdgeNub (n,node,link1)

link2 = (nB,node,DGLink {

dgl_morphism = morDelta',

dgl_type = GlobalDef,

dgl_origin = DGSpecInst spname})

parLinks = catMaybes (map (parLink gsigmaRes node) actualargs)

return (Spec_inst spname

(map (uncurry replaceAnnoted)

(zip (reverse fitargs') afitargs))

pos,

NodeSig(node,gsigmaRes),

foldr insEdgeNub

(insLink1 $

insEdgeNub link2 $

insNode (node,node_contents) dg')

parLinks)

where

anaFitArg res (nsig',fa) = do

(fas',dg1,args,name') <- res

(fa',dg',arg) <- ana_FIT_ARG lg (gannos,genv,dg1)

spname imps nsig' opts name' fa

return (fa':fas',dg',arg:args,inc name')

parLink gsigma' node (_mor_i,nsigA_i) = do

nA_i <- getNode nsigA_i

incl <- maybeResult $ ginclusion lg (getSig nsigA_i) gsigma'

let link = DGLink {

dgl_morphism = incl,

dgl_type = GlobalDef,

dgl_origin = DGFitSpec }

return (nA_i,node,link)

-- finally the case with conflicting numbers of formal and actual parameters

_ ->

plain_error (sp,nsig,dg)

(showPretty spname " expects "++show (length params)++" arguments"

++" but was given "++show (length afitargs)) pos

Data (Logic lidD) (Logic lidP) asp1 asp2 pos ->

do let sp1 = item asp1

sp2 = item asp2

adj = adjustPos pos

Comorphism cid <- adj $ logicInclusion lg (Logic lidD) (Logic lidP)

let lidD' = sourceLogic cid

lidP' = targetLogic cid

(sp1',nsig1,dg1) <-

ana_SPEC lg gctx (EmptyNode (Logic lidD)) (inc name) opts sp1

n' <- adj $ maybeToMonad

"Internal error: Data spec over empty spec" (getNode nsig1)

let gsigma' = getSig nsig1

G_sign lid' sigma' <- return gsigma'

sigmaD <- adj $ mcoerce lid' lidD' "Analysis of data spec" sigma'

(sigmaD',sensD') <- adj $ map_sign cid sigmaD

let gsigmaD' = G_sign lidP' sigmaD'

node_contents = DGNode {

dgn_name = name,

dgn_sign = gsigmaD',

dgn_sens = G_l_sentence_list lidP' sensD',

dgn_nf = Nothing,

dgn_sigma = Nothing,

dgn_origin = DGData }

node = getNewNode dg1

link = (n',node,DGLink {

dgl_morphism = GMorphism cid sigmaD (ide lidP' sigmaD'),

dgl_type = GlobalDef,

dgl_origin = DGData })

dg2 = insEdgeNub link $

insNode (node,node_contents) dg1

nsig2 = NodeSig (node,gsigmaD')

(sp2',nsig3,dg3) <-

ana_SPEC lg (gannos,genv,dg2) nsig2 name opts sp2

return (Data (Logic lidD) (Logic lidP)

(replaceAnnoted sp1' asp1)

(replaceAnnoted sp2' asp2)

pos,

nsig3,

dg3)

-- analysis of renamings

ana_ren1 :: LogicGraph -> GMorphism -> G_mapping -> Result GMorphism

ana_ren1 _ (GMorphism r sigma mor)

(G_symb_map (G_symb_map_items_list lid sis)) = do

let lid2 = targetLogic r

sis1 <- mcoerce lid2 lid "Analysis of renaming" sis

rmap <- stat_symb_map_items lid2 sis1

mor1 <- induced_from_morphism lid2 rmap (cod lid2 mor)

mor2 <- comp lid2 mor mor1

return $ GMorphism r sigma mor2

ana_ren1 lg mor (G_logic_translation (Logic_code tok src tar pos1)) = do

let adj = adjustPos pos1

G_sign srcLid srcSig <- return (cod Grothendieck mor)

c <- adj $ case tok of

Just ctok -> do

Comorphism cid <- lookupComorphism (tokStr ctok) lg

when (isJust src && getLogicStr (fromJust src) /=

language_name (sourceLogic cid))

(fail (getLogicStr (fromJust src)++"is not the source logic of "

++ language_name cid))

when (isJust tar && getLogicStr (fromJust tar) /=

language_name (targetLogic cid))

(fail (getLogicStr (fromJust tar)++"is not the target logic of "

++ language_name cid))

return (Comorphism cid)

Nothing -> case tar of

Just (Logic_name l _) -> do

tarL <- lookupLogic "with logic: " (tokStr l) lg

logicInclusion lg (Logic srcLid) tarL

Nothing -> fail "with logic: cannot determine comorphism"

mor1 <- adj $ gEmbedComorphism c (G_sign srcLid srcSig)

adj $ comp Grothendieck mor mor1

where getLogicStr (Logic_name l _) = tokStr l

ana_ren :: LogicGraph -> Result GMorphism -> G_mapping -> Result GMorphism

ana_ren lg mor_res ren =

do mor <- mor_res

ana_ren1 lg mor ren

ana_RENAMING :: LogicGraph -> G_sign -> HetcatsOpts -> RENAMING

-> Result GMorphism

ana_RENAMING lg gSigma opts (Renaming ren _) =

if isStructured opts

then return (ide Grothendieck gSigma)

else foldl (ana_ren lg) (return (ide Grothendieck gSigma)) ren

-- analysis of restrictions

ana_restr1 :: DGraph -> G_sign -> GMorphism -> G_hiding -> Result GMorphism

ana_restr1 _ (G_sign _lid _sigma) (GMorphism cid sigma1 mor)

(G_symb_list (G_symb_items_list lid' sis')) = do

let lid1 = sourceLogic cid

lid2 = targetLogic cid

sis1 <- mcoerce lid1 lid' "Analysis of restriction" sis'

rsys <- stat_symb_items lid1 sis1

let sys = sym_of lid1 sigma1

let sys' = Set.filter (\sy -> any (\rsy -> matches lid1 sy rsy) rsys)

sys

-- if sys' `disjoint` () then return ()

-- else plain_error () "attempt to hide symbols from the local environment" pos

mor1 <- cogenerated_sign lid1 sys' sigma1

mor1' <- map_morphism cid mor1

mor2 <- comp lid2 mor1' mor

return $ GMorphism cid (dom lid1 mor1) mor2

ana_restr1 _dg _gSigma _mor

(G_logic_projection (Logic_code _tok _src _tar pos1)) =

fatal_error "no analysis of logic projections yet" pos1

ana_restr :: DGraph -> G_sign -> Result GMorphism -> G_hiding

-> Result GMorphism

ana_restr dg gSigma mor_res restr =

do mor <- mor_res

ana_restr1 dg gSigma mor restr

ana_RESTRICTION :: DGraph -> G_sign -> G_sign -> HetcatsOpts -> RESTRICTION

-> Result (GMorphism, Maybe GMorphism)

ana_RESTRICTION dg gSigma gSigma' opts restr =

ana_RESTRICTION' dg gSigma gSigma' (isStructured opts) restr

ana_RESTRICTION' :: DGraph -> G_sign -> G_sign -> Bool -> RESTRICTION

-> Result (GMorphism, Maybe GMorphism)

ana_RESTRICTION' _ _ gSigma True _ =

return (ide Grothendieck gSigma,Nothing)

ana_RESTRICTION' dg gSigma gSigma' False (Hidden restr _) =

do mor <- foldl (ana_restr dg gSigma)

(return (ide Grothendieck gSigma'))

restr

return (mor,Nothing)

-- ??? Need to check that local env is not affected !

ana_RESTRICTION' _ (G_sign lid sigma) (G_sign lid' sigma')

False (Revealed (G_symb_map_items_list lid1 sis) pos) =

do let sys = sym_of lid sigma -- local env

sys' = sym_of lid' sigma' -- "big" signature

adj = adjustPos pos

sis' <- adj $ mcoerce lid1 lid' "Analysis of restriction" sis

rmap <- adj $ stat_symb_map_items lid' sis'

let sys'' =

Set.fromList

[sy | sy <- Set.toList sys', rsy <- Map.keys rmap, matches lid' sy rsy]

-- domain of rmap intersected with sys'

-- domain of rmap should be checked to match symbols from sys' ???

sys1 <- adj $ mcoerce lid lid' "Analysis of restriction" sys

-- ??? this is too simple in case that local env is translated

-- to a different logic

mor1 <- adj $ generated_sign lid' (sys1 `Set.union` sys'') sigma'

mor2 <- adj $ induced_from_morphism lid' rmap (dom lid' mor1)

return (gEmbed (G_morphism lid' mor1),

Just (gEmbed (G_morphism lid' mor2)))

ana_FIT_ARG :: LogicGraph -> GlobalContext -> SPEC_NAME -> NodeSig -> NodeSig

-> HetcatsOpts

-> NODE_NAME -> FIT_ARG

-> Result (FIT_ARG, DGraph, (G_morphism,NodeSig))

ana_FIT_ARG lg gctx spname nsigI nsigP opts name

fs@(Fit_spec asp gsis poss) = do

let pos = get_pos fs

adj = adjustPos pos

nP <- maybeToResult pos

"Internal error: empty parameter spec" (getNode nsigP)

(sp',nsigA,dg') <- ana_SPEC lg gctx nsigI name opts (item asp)

nA <- maybeToResult pos

"Internal error: empty argument spec" (getNode nsigA)

let gsigmaP = getSig nsigP

gsigmaA = getSig nsigA

-- gsigmaI = getSig nsigI

G_sign lidP sigmaP <- return gsigmaP

G_sign lidA sigmaA <- return gsigmaA

-- G_sign lidI sigmaI <- return gsigmaI

G_symb_map_items_list lid sis <- return gsis

sigmaA' <- adj $ mcoerce lidA lidP "Analysis of fitting argument" sigmaA

-- sigmaI' <- adj $ mcoerce lidI lidP "Analysis of fitting argument" sigmaI

mor <- adj $ if isStructured opts then return (ide lidP sigmaP)

else do

rmap <- stat_symb_map_items lid sis

rmap' <- if null sis then return Map.empty

else mcoerce lid lidP "Analysis of fitting argument" rmap

induced_from_to_morphism lidP rmap' sigmaP sigmaA'

{-

let symI = sym_of lidP sigmaI'

symmap_mor = symmap_of lidP mor

-- are symbols of the imports left untouched?

if Set.all (\sy -> lookupFM symmap_mor sy == Just sy) symI

then return ()

else plain_error () "Fitting morphism must not affect import" ( pos)

-} -- ??? does not work

-- ??? also output some symbol that is affected

let link = (nP,nA,DGLink {

dgl_morphism = gEmbed (G_morphism lidP mor),

dgl_type = GlobalThm Open None Open,

dgl_origin = DGSpecInst spname})

return (Fit_spec (replaceAnnoted sp' asp) gsis poss,

insEdgeNub link dg',

(G_morphism lidP mor,nsigA)

)

ana_FIT_ARG lg (gannos,genv,dg) spname nsigI nsigP opts name

fv@(Fit_view vn afitargs poss ans) = do

let pos = poss

adj = adjustPos pos

case Map.lookup vn genv of

Nothing -> plain_error (fv,dg,error "no morphism")

("View "++ showPretty vn " not found") pos

Just (SpecEntry _) ->

plain_error (fv,dg,error "no fit view")

(showPretty spname " is a specification, not a view") pos

Just (ArchEntry _) ->

plain_error (fv,dg,error "no fit view")

(showPretty spname

" is an architectural specification, not a view ") pos

Just (UnitEntry _) ->

plain_error (fv,dg,error "no fit view")

(showPretty spname

" is a unit specification, not a view") pos

Just (RefEntry) ->

plain_error (fv,dg,error "no fit view")

(showPretty spname

" is a refinement specification, not a view") pos

Just (ViewEntry (src,mor,gs@(imps,params,_,target))) -> do

nSrc <- maybeToResult pos

"Internal error: empty source spec of view" (getNode src)

nTar <- maybeToResult pos

"Internal error: empty target spec of view" (getNode target)

nP <- maybeToResult pos

"Internal error: empty parameter specification" (getNode nsigP)

let gsigmaS = getSig src

gsigmaT = getSig target

gsigmaP = getSig nsigP

gsigmaI = getSig nsigI

gsigmaIS <- adj $ gsigUnion lg gsigmaI gsigmaS

when (not (is_subgsign gsigmaP gsigmaIS))

(pplain_error ()

(ptext "Parameter does not match source of fittig view."

$$ ptext "Parameter signature:"

$$ printText gsigmaP

$$ ptext "Source signature of fitting view (united with import):"

$$ printText gsigmaIS) pos)

GMorphism cid _ morHom <- return mor

let lid = targetLogic cid

when (not (language_name (sourceLogic cid) == language_name lid))

(fatal_error

"heterogeneous fitting views not yet implemented"

pos)

case (\x y -> (x,x-y)) (length afitargs) (length params) of

-- the case without parameters leads to a simpler dg

(0,0) -> case getNode nsigI of

-- the subcase with empty import leads to a simpler dg

Nothing -> do

let link = (nP,nSrc,DGLink {

dgl_morphism = ide Grothendieck gsigmaP,

dgl_type = GlobalThm Open None Open,

dgl_origin = DGFitView spname})

return (fv,insEdgeNub link dg,(G_morphism lid morHom,target))

-- the subcase with nonempty import

Just nI -> do

G_sign lidI sigI1 <- return gsigmaI

sigI <- adj $ mcoerce lidI lid "Analysis of instantiation with import" sigI1

mor_I <- adj $ morphism_union lid morHom $ ide lid sigI

gsigmaA <- adj $ gsigUnion lg gsigmaI gsigmaT

G_sign lidA _ <- return gsigmaA

G_sign lidP _ <- return gsigmaP

incl1 <- adj $ ginclusion lg gsigmaI gsigmaA

incl2 <- adj $ ginclusion lg gsigmaT gsigmaA

incl3 <- adj $ ginclusion lg gsigmaI gsigmaP

incl4 <- adj $ ginclusion lg gsigmaS gsigmaP

let [nA,n'] = newNodes 2 dg

node_contentsA = DGNode {

dgn_name = name,

dgn_sign = gsigmaA,

dgn_sens = G_l_sentence_list lidA [],

dgn_nf = Nothing,

dgn_sigma = Nothing,

dgn_origin = DGFitViewA spname}

node_contents' = DGNode {

dgn_name = inc name,

dgn_sign = gsigmaP,

dgn_sens = G_l_sentence_list lidP [],

dgn_nf = Nothing,

dgn_sigma = Nothing,

dgn_origin = DGFitView spname}

link = (nP,n',DGLink {

dgl_morphism = ide Grothendieck gsigmaP,

dgl_type = GlobalThm Open None Open,

dgl_origin = DGFitView spname})

link1 = (nSrc,n',DGLink {

dgl_morphism = incl4,

dgl_type = GlobalDef,

dgl_origin = DGFitView spname})

link2 = (nTar,nA,DGLink {

dgl_morphism = incl2,

dgl_type = GlobalDef,

dgl_origin = DGFitViewA spname})

link3 = (nI,n',DGLink {

dgl_morphism = incl3,

dgl_type = GlobalDef,

dgl_origin = DGFitViewImp spname})

link4 = (nI,nA,DGLink {

dgl_morphism = incl1,

dgl_type = GlobalDef,

dgl_origin = DGFitViewAImp spname})

return (fv,

insEdgeNub link $

insEdgeNub link1 $

insEdgeNub link2 $

insEdgeNub link3 $

insEdgeNub link4 $

insNode (nA,node_contentsA) $

insNode (n',node_contents') dg,

(G_morphism lid mor_I,NodeSig (nA,gsigmaA)))

-- now the case with parameters

(_,0) -> do

let fitargs = map item afitargs

(fitargs',dg',args,_) <-

foldl anaFitArg (return ([],dg,[],extName "A" name))

(zip params fitargs)

let actualargs = reverse args

(gsigmaA,mor_f) <- adj $ apply_GS lg gs actualargs

let gmor_f = gEmbed mor_f

gsigmaRes <- adj $ gsigUnion lg gsigmaI gsigmaA

G_sign lidRes _ <- return gsigmaRes

mor1 <- adj $ comp Grothendieck mor gmor_f

incl1 <- adj $ ginclusion lg gsigmaA gsigmaRes

mor' <- adj $ comp Grothendieck gmor_f incl1

GMorphism cid1 _ mor1Hom <- return mor1

let lid1 = targetLogic cid1

when (not (language_name (sourceLogic cid1) == language_name lid1))

(fatal_error

("heterogeneous fitting views not yet implemented")

pos)

G_sign lidI sigI1 <- return gsigmaI

sigI <- adj $ mcoerce lidI lid1 "Analysis of instantiation with parameters" sigI1

theta <- adj $ morphism_union lid1 mor1Hom (ide lid1 sigI)

incl2 <- adj $ ginclusion lg gsigmaI gsigmaRes

incl3 <- adj $ ginclusion lg gsigmaI gsigmaP

incl4 <- adj $ ginclusion lg gsigmaS gsigmaP

G_sign lidP _ <- return gsigmaP

let [nA,n'] = newNodes 2 dg'

node_contentsA = DGNode {

dgn_name = name,

dgn_sign = gsigmaRes,

dgn_sens = G_l_sentence_list lidRes [],

dgn_nf = Nothing,

dgn_sigma = Nothing,

dgn_origin = DGFitViewA spname}

node_contents' = DGNode {

dgn_name = extName "V" name,

dgn_sign = gsigmaP,

dgn_sens = G_l_sentence_list lidP [],

dgn_nf = Nothing,

dgn_sigma = Nothing,

dgn_origin = DGFitView spname}

link = (nP,n',DGLink {

dgl_morphism = ide Grothendieck gsigmaP,

dgl_type = GlobalThm Open None Open,

dgl_origin = DGFitView spname})

link1 = (nSrc,n',DGLink {

dgl_morphism = incl4,

dgl_type = GlobalDef,

dgl_origin = DGFitView spname})

link2 = (nTar,nA,DGLink {

dgl_morphism = mor',

dgl_type = GlobalDef,

dgl_origin = DGFitViewA spname})

fitLinks = [link,link1,link2] ++ case getNode nsigI of

Nothing -> []

Just nI -> let

link3 = (nI,n',DGLink {

dgl_morphism = incl3,

dgl_type = GlobalDef,

dgl_origin = DGFitViewImp spname})

link4 = (nI,nA,DGLink {

dgl_morphism = incl2,

dgl_type = GlobalDef,

dgl_origin = DGFitViewAImp spname})

in [link3,link4]

parLinks = catMaybes (map (parLink gsigmaRes nA) actualargs)

return (Fit_view vn

(map (uncurry replaceAnnoted)

(zip (reverse fitargs') afitargs))

poss ans,

foldr insEdgeNub

(insNode (nA,node_contentsA) $

insNode (n',node_contents') dg')

(fitLinks++parLinks),

(G_morphism lid1 theta,NodeSig (nA,gsigmaRes)))

where

anaFitArg res (nsig',fa) = do

(fas',dg1,args,name') <- res

(fa',dg',arg) <- ana_FIT_ARG lg (gannos,genv,dg1)

spname imps nsig' opts name' fa

return (fa':fas',dg',arg:args,inc name')

parLink gsigmaRes node (_mor_i,nsigA_i) = do

nA_i <- getNode nsigA_i

incl <- maybeResult $ ginclusion lg (getSig nsigA_i) gsigmaRes

let link = DGLink {

dgl_morphism = incl,

dgl_type = GlobalDef,

dgl_origin = DGFitView spname }

return (nA_i,node,link)

-- finally the case with conflicting numbers of formal and actual parameters

_ ->

plain_error (fv,dg,error "no fit view")

(showPretty spname " expects "++show (length params)++" arguments"

++" but was given "++show (length afitargs)) pos

-- Extension of signature morphisms (for instantitations)

-- first some auxiliary functions

{- not really needed:

-- for an Id, compute the list of components that are relevant for extension

idComponents :: Id -> Set.Set Id -> [Id]

idComponents (Id toks comps pos) ids =

foldl (\x y -> y++x) []

$ map (\id1 -> if id1 `Set.member` ids

then [id1]

else idComponents id1 ids)

comps

--

componentRelation :: Set.Set Id -> Set.Set (Id,[Id])

componentRelation ids =

Set.map (\id -> (id,idComponents id ids)) ids

-}

mapID :: Map.Map Id (Set.Set Id) -> Id -> Result Id

mapID idmap i@(Id toks comps pos1) =

case Map.lookup i idmap of

Nothing -> do

compsnew <- sequence $ map (mapID idmap) comps

return (Id toks compsnew pos1)

Just ids -> case Set.size ids of

0 -> return i

1 -> return $ Set.findMin ids

_ -> pplain_error i

(ptext "Identifier component " <+> printText i

<+> ptext "can be mapped in various ways:"

<+> printText ids) nullPos

extID1 :: Map.Map Id (Set.Set Id) -> Id

-> Result (EndoMap Id) -> Result (EndoMap Id)

extID1 idmap i@(Id toks comps pos1) m = do

m1 <- m

compsnew <- sequence $ map (mapID idmap) comps

if comps==compsnew

then return m1

else return (Map.insert i (Id toks compsnew pos1) m1)

extID :: Set.Set Id -> Map.Map Id (Set.Set Id) -> Result (EndoMap Id)

extID ids idmap = Set.fold (extID1 idmap) (return Map.empty) ids

extendMorphism :: G_sign -- ^ formal parameter

-> G_sign -- ^ body

-> G_sign -- ^ actual parameter

-> G_morphism -- ^ fitting morphism

-> Result(G_sign,G_morphism)

extendMorphism (G_sign lid sigmaP) (G_sign lidB sigmaB1)

(G_sign lidA sigmaA1) (G_morphism lidM fittingMor1) = do

-- for now, only homogeneous instantiations....

sigmaB <- mcoerce lidB lid "Extension of symbol map" sigmaB1

sigmaA <- mcoerce lidA lid "Extension of symbol map" sigmaA1

fittingMor <- mcoerce lidM lid "Extension of symbol map" fittingMor1

let symsP = sym_of lid sigmaP

symsB = sym_of lid sigmaB

idsB = Set.map (sym_name lid) symsB

h = symmap_of lid fittingMor

symbMapToRawSymbMap =

Map.foldWithKey (\sy1 sy2 -> Map.insert (symbol_to_raw lid sy1)

(symbol_to_raw lid sy2))

Map.empty

rh = symbMapToRawSymbMap h

idh = Map.foldWithKey

(\sy1 sy2 -> Rel.setInsert (sym_name lid sy1) (sym_name lid sy2))

Map.empty h

idhExt <- extID idsB idh

let rIdExt = Map.foldWithKey

(\id1 id2 -> Map.insert (id_to_raw lid id1) (id_to_raw lid id2))

Map.empty

(foldr (\i -> Map.delete i) idhExt $ Map.keys idh)

r = rh `Map.union` rIdExt

-- do we need combining function catching the clashes???

mor <- induced_from_morphism lid r sigmaB

let hmor = symmap_of lid mor

sigmaAD = cod lid mor

sigma <- final_union lid sigmaA sigmaAD

let illShared = (sym_of lid sigmaA `Set.intersection` sym_of lid sigmaAD )

Set.\\ Rel.image h symsP

when (not (Set.null illShared))

(pplain_error () (ptext

"Symbols shared between actual parameter and body must be in formal parameter"

$$ printText illShared ) nullPos)

let myKernel m = Set.fromDistinctAscList $ comb1 $ Map.assocs m

comb1 [] = []

comb1 (p : qs) =

comb2 p qs [] ++ comb1 qs

comb2 _ [] rs = rs

comb2 p@(a, b) ((c, d) : qs) rs =

comb2 p qs $ if b == d then (a, c) : rs else rs

newIdentifications = myKernel hmor Set.\\ myKernel h

when (not (Set.null newIdentifications))

(pplain_error () (ptext

"Fitting morphism leads to forbidden identifications"

$$ printText newIdentifications) nullPos)

incl <- inclusion lid sigmaAD sigma

mor1 <- comp lid mor incl

return (G_sign lid sigma, G_morphism lid mor1)

apply_GS :: LogicGraph -> ExtGenSig -> [(G_morphism,NodeSig)]

-> Result(G_sign,G_morphism)

apply_GS lg (nsigI,_params,gsigmaP,nsigB) args = do

let mor_i = map fst args

gsigmaA_i = map (getSig . snd) args

gsigmaB = getSig nsigB

gsigmaI = getSig nsigI

G_sign lidI sigmaI <- return gsigmaI

let idI = ide lidI sigmaI

gsigmaA <- gsigManyUnion lg gsigmaA_i

mor_f <- homogeneousMorManyUnion (G_morphism lidI idI:mor_i)

extendMorphism gsigmaP gsigmaB gsigmaA mor_f

-- | analyze a GENERICITY

-- Parameters: global context, current logic, just-structure-flag, GENERICITY

ana_GENERICITY :: LogicGraph -> GlobalContext -> AnyLogic -> HetcatsOpts

-> NODE_NAME -> GENERICITY

-> Result (GENERICITY,ExtGenSig,DGraph)

-- zero parameters,

ana_GENERICITY _ (_,_,dg) l@(Logic lid) _ _

gen@(Genericity (Params []) (Imported imps) pos) = do

when (not (null imps))

(plain_error () "Parameterless specifications must not have imports"

pos)

return (gen,(EmptyNode l,[],G_sign lid (empty_signature lid),EmptyNode l),dg)

-- one parameter ...

ana_GENERICITY lg gctx@(gannos,genv,_) l opts name

(Genericity (Params [asp]) imps pos) = do

(imps',nsigI,dg') <- ana_IMPORTS lg gctx l opts (extName "I" name) imps

(sp',nsigP,dg'') <- ana_SPEC lg (gannos,genv,dg') nsigI name opts (item asp)

return (Genericity (Params [replaceAnnoted sp' asp]) imps' pos,

(nsigI,[nsigP],getSig nsigP,nsigP),

dg'')

-- ... and more parameters

ana_GENERICITY lg gctx@(gannos,genv,_) l opts name

(Genericity params imps pos) = do

let adj = adjustPos pos

(imps',nsigI,dg') <- ana_IMPORTS lg gctx l opts (extName "I" name) imps

(params',nsigPs,dg'') <-

ana_PARAMS lg (gannos,genv,dg') l nsigI opts (inc name) params

gsigmaP <- adj $ gsigManyUnion lg (map getSig nsigPs)

G_sign lidP _ <- return gsigmaP

let node_contents = DGNode {

dgn_name = name,

dgn_sign = gsigmaP, -- G_sign lidP (empty_signature lidP),

dgn_sens = G_l_sentence_list lidP [],

dgn_nf = Nothing,

dgn_sigma = Nothing,

dgn_origin = DGFormalParams }

node = getNewNode dg''

dg''' = insNode (node,node_contents) dg''

inslink dgres nsig = do

dg <- dgres

case getNode nsig of

Nothing -> return dg

Just n -> do

incl <- adj $ ginclusion lg (getSig nsig) gsigmaP

return (insEdgeNub (n,node,DGLink {

dgl_morphism = incl,

dgl_type = GlobalDef,

dgl_origin = DGFormalParams }) dg)

dg4 <- foldl inslink (return dg''') nsigPs

return (Genericity params' imps' pos,

(nsigI,nsigPs,gsigmaP,NodeSig(node,gsigmaP)),

dg4)

ana_PARAMS :: LogicGraph -> GlobalContext -> AnyLogic -> NodeSig -> HetcatsOpts

-> NODE_NAME -> PARAMS

-> Result (PARAMS,[NodeSig],DGraph)

ana_PARAMS lg (gannos,genv,dg) _ nsigI opts name (Params asps) = do

(sps',pars,dg',_) <- foldl ana (return ([],[],dg,name)) (map item asps)

return (Params (map (uncurry replaceAnnoted)

(zip (reverse sps') asps)),

reverse pars,

dg')

where

ana res sp = do

(sps',pars,dg1,n) <- res

(sp',par,dg') <- ana_SPEC lg (gannos,genv,dg1) nsigI n opts sp

return (sp':sps',par:pars,dg',inc n)

ana_IMPORTS :: LogicGraph -> GlobalContext -> AnyLogic -> HetcatsOpts

-> NODE_NAME -> IMPORTED

-> Result (IMPORTED,NodeSig,DGraph)

ana_IMPORTS lg gctx l opts name (Imported asps) = do

let sp = Union asps []

(Union asps' _,nsig',dg') <-

ana_SPEC lg gctx (EmptyNode l) name opts sp

return (Imported asps',nsig',dg')

-- ??? emptyExplicit stuff needs to be added here

-- | analyze a VIEW_TYPE

-- The first three arguments give the global context

-- The AnyLogic is the current logic

-- The NodeSig is the signature of the parameter of the view

-- flag, whether just the structure shall be analysed

ana_VIEW_TYPE:: LogicGraph -> GlobalContext -> AnyLogic -> NodeSig -> HetcatsOpts

-> NODE_NAME -> VIEW_TYPE

-> Result (VIEW_TYPE,(NodeSig,NodeSig),DGraph)

ana_VIEW_TYPE lg gctx@(gannos,genv,_) l parSig opts name

(View_type aspSrc aspTar pos) = do

(spSrc',srcNsig,dg') <-

ana_SPEC lg gctx (EmptyNode l) (extName "S" name) opts (item aspSrc)

(spTar',tarNsig,dg'') <-

ana_SPEC lg (gannos,genv,dg') parSig (extName "T" name) opts (item aspTar)

return (View_type (replaceAnnoted spSrc' aspSrc)

(replaceAnnoted spTar' aspTar)

pos,

(srcNsig,tarNsig),

dg'')

-- | check if structured analysis should be performed

isStructured :: HetcatsOpts -> Bool

isStructured a = case analysis a of Structured -> True

_ -> False

-- | Auxiliary function for not yet implemented features

ana_err :: String -> a

ana_err fname =

error ("*** Analysis of " ++ fname ++ " is not yet implemented!")