{- |

Module : $Header$

Copyright : (c) Markus Roggenbach, Till Mossakowski, Uni Bremen 2004-2005

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

Maintainer : M.Roggenbach@swansea.ac.uk

Stability : provisional

Portability : portable

static analysis for CSP-CASL

-}

{- todo:

most of the process and channel analysis missing

sentences are completely missing:

use equation systems of processes, like:

spec hugo =

data ...

channel ...

process A = a->A

process P = ...A...Q...

Q = ...P....

R = a->P

reveal R

reveal R should keep CASL data part, and reveal process R

-}

module CspCASL.StatAnaCSP where

import CASL.Sign

import Common.AS_Annotation

import Common.Result

import Common.GlobalAnnotations

import Common.Id

import qualified Data.Map as Map

import Common.Lib.State

import CspCASL.AS_CspCASL (BASIC_CSP_CASL_SPEC(..))

import CspCASL.AS_CspCASL_Process (PROCESS_DEFN(..),

CHANNEL_DECL(..),

CHANNEL_ITEM(..)

)

import CspCASL.SignCSP

-- This is a very null analysis function, returning as it does

-- essentially unchanged data.

basicAnalysisCspCASL :: (BASIC_CSP_CASL_SPEC, CSPSign, GlobalAnnos)

-> Result (BASIC_CSP_CASL_SPEC, CSPSign, [Named ()])

basicAnalysisCspCASL (Basic_Csp_Casl_Spec dd p, sigma, _ga) =

do let ((ch',p'), accSig) = runState (ana_BASIC_CSP ((Channel_items []),(Process p))) sigma

ds = reverse $ envDiags accSig

Result ds (Just ()) -- insert diags

return (Basic_Csp_Casl_Spec dd p, accSig, [])

-- | the main CspCASL analysis function

ana_BASIC_CSP :: (CHANNEL_DECL, PROCESS_DEFN)

-> State CSPSign (CHANNEL_DECL, PROCESS_DEFN)

ana_BASIC_CSP (ch, p) = do

ch' <- anaChannels ch

p' <- anaProcesses p

return (ch',p')

anaChannels :: CHANNEL_DECL -> State CSPSign CHANNEL_DECL

anaChannels (Channel_items cits) =

fmap Channel_items $ mapM (anaChannel) cits

anaChannel :: CHANNEL_ITEM -> State CSPSign CHANNEL_ITEM

anaChannel chdecl@(Channel_decl newnames s) = do

checkSorts [s]

sig <- get

let ext = extendedInfo sig

oldchn = channelNames ext

-- test for double declaration with different sorts should be added

let ins m n = Map.insert (mkId [n]) s m

put sig { extendedInfo = ext { channelNames = foldl ins oldchn newnames } }

return chdecl

anaProcesses :: PROCESS_DEFN -> State CSPSign PROCESS_DEFN

anaProcesses p = return p