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----------------------------------------------------------------------
-- |
-- Module : (Module)
-- Maintainer : (Maintainer)
-- Stability : (stable)
-- Portability : (portable)
--
-- > CVS $Date $
-- > CVS $Author $
-- > CVS $Revision $
--
-- Creating and using lock fields in reused resource grammars.
-----------------------------------------------------------------------------
module Lockfield (lockRecType, unlockRecord, lockLabel) where
import Grammar
import Ident
import Macros
import PrGrammar
import Operations
-- AR 8/2/2005 detached from compile/MkResource
lockRecType :: Ident -> Type -> Err Type
lockRecType c t = plusRecType t $ RecType [(lockLabel c, RecType [])]
unlockRecord :: Ident -> Term -> Err Term
unlockRecord c ft = do
let (xs,t) = termFormCnc ft
t' <- plusRecord t $ R [(lockLabel c, (Just (RecType []),R []))]
return $ mkAbs xs t'
lockLabel :: Ident -> Label
lockLabel c = LIdent $ "lock_" ++ prt c ----
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