AS_CspCASL_Process.der.hs revision 293d1430cbd764408a2565ce95380ee9aedd26c4
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{- |
Module : $Id$
Description : Abstract syntax of CSP-CASL processes
Copyright : (c) Markus Roggenbach and Till Mossakowski and Uni Bremen 2004
License : similar to LGPL, see HetCATS/LICENSE.txt or LIZENZ.txt
Maintainer : a.m.gimblett@swan.ac.uk
Stability : provisional
Portability : portable
Abstract syntax of CSP-CASL processes.
-}
module CspCASL.AS_CspCASL_Process (
CHANNEL_NAME,
COMM_TYPE,
EVENT(..),
EVENT_SET(..),
PROCESS(..),
PROCESS_NAME,
RENAMING (..),
CommAlpha,
CommType(..),
TypedChanName(..)
) where
import CASL.AS_Basic_CASL (FORMULA, SORT, TERM, VAR)
import Common.Id
import qualified Data.Set as Set
-- DrIFT command
{-! global: GetRange !-}
data EVENT
-- | @t -> p@ - Term prefix
= TermEvent (TERM ()) Range
-- | @[] var :: s -> p@ - External nondeterministic prefix choice
| ExternalPrefixChoice VAR SORT Range
-- | @|~| var :: s -> p@ - Internal nondeterministic prefix choice
| InternalPrefixChoice VAR SORT Range
-- | @c ! t -> p@ - Channel send
| ChanSend CHANNEL_NAME (TERM ()) Range
-- | @c ! var :: s -> p@ - Channel nondeterministic send
| ChanNonDetSend CHANNEL_NAME VAR SORT Range
-- | @c ? var :: s -> p@ - Channel recieve
| ChanRecv CHANNEL_NAME VAR SORT Range
-- | A fully qualified event contains the (non-fully qualified)
-- event being qualified. There other parameters depend on the
-- underlying type of the event.
--
-- For TermEvent, the fully qualified channel should be nothing
-- and the fully qualified term should be the fully qualified
-- CASL term version of the term being communicated in the inner
-- process.
--
-- For ExternalPrefixChoice and InternalPrefixChoice, the fully
-- qualified channel should be nothing and the fully qualified
-- term should be the fully qualified CASL variable version (a
-- term) of the inner process's variable.
--
-- For ChanSend, the fully qualified channel should be the fully
-- qualified channel of the underlying event and the fully
-- qualified term should be the fully qualified CASL term
-- version of the term being communicated in the inner process.
--
-- For ChanNonDetSend and ChanRecv, the fully qualified channel
-- should be the fully qualified channel of the underlying event
-- and the fully qualified CASL variable version (a term) of the
-- inner process's variable
| FQEvent EVENT (Maybe (CHANNEL_NAME, SORT)) (TERM ()) Range
deriving (Show,Ord, Eq)
-- | Event sets are sets of communication types.
data EVENT_SET = EventSet [COMM_TYPE] Range
-- | FQEvent set distinguishes between channel names and Sorts
| FQEventSet [CommType] Range
deriving (Show,Ord, Eq)
-- | CSP renamings are predicate names or op names.
data RENAMING = Renaming [Id]
| FQRenaming [TERM ()]
deriving (Show,Ord, Eq)
type CHANNEL_NAME = SIMPLE_ID
type PROCESS_NAME = SIMPLE_ID
type COMM_TYPE = SIMPLE_ID
-- | A process communication alphabet consists of a set of sort names
-- and typed channel names.
data TypedChanName = TypedChanName CHANNEL_NAME SORT
deriving (Eq, Ord, Show)
data CommType = CommTypeSort SORT
| CommTypeChan TypedChanName
deriving (Eq, Ord)
instance Show CommType where
show (CommTypeSort s) = show s
show (CommTypeChan (TypedChanName c s)) = show (c, s)
type CommAlpha = Set.Set CommType
-- | CSP-CASL process expressions.
data PROCESS
-- | @Skip@ - Terminate immediately
= Skip Range
-- | @Stop@ - Do nothing
| Stop Range
-- | @div@ - Divergence
| Div Range
-- | @Run es@ - Accept any event in es, forever
| Run EVENT_SET Range
-- | @Chaos es@ - Accept\/refuse any event in es, forever
| Chaos EVENT_SET Range
-- | @event -> p@ - Prefix process
| PrefixProcess EVENT PROCESS Range
-- | @p ; q@ - Sequential process
| Sequential PROCESS PROCESS Range
-- | @p [] q@ - External choice
| ExternalChoice PROCESS PROCESS Range
-- | @p |~| q@ - Internal choice
| InternalChoice PROCESS PROCESS Range
-- | @p ||| q@ - Interleaving
| Interleaving PROCESS PROCESS Range
-- | @p || q @ - Synchronous parallel
| SynchronousParallel PROCESS PROCESS Range
-- | @p [| a |] q@ - Generalised parallel
| GeneralisedParallel PROCESS EVENT_SET PROCESS Range
-- | @p [ a || b ] q@ - Alphabetised parallel
| AlphabetisedParallel PROCESS EVENT_SET EVENT_SET PROCESS Range
-- | @p \\ es@ - Hiding
| Hiding PROCESS EVENT_SET Range
-- | @p [[r]]@ - Renaming
| RenamingProcess PROCESS RENAMING Range
-- | @if f then p else q@ - Conditional
| ConditionalProcess (FORMULA ()) PROCESS PROCESS Range
-- | Named process
| NamedProcess PROCESS_NAME [TERM ()] Range
-- | Fully qualified process. The range here shall be the same as
-- | in the process.
| FQProcess PROCESS CommAlpha Range
deriving (Eq, Ord, Show)