|
definition:
|
addPreConditions :: Options -> TAProg -> IORef VState -> IO TAProg
addPreConditions _ prog vstref = do
newfuns <- mapM addPreCondition (progFuncs prog)
return (updProgFuncs (const (concat newfuns)) prog)
where
addPreCondition fdecl@(AFunc qf ar vis fty rule) = do
ti <- readVerifyInfoRef vstref
return $
if toPreCondQName qf `elem` map funcName (preConds ti)
then let newrule = checkPreCondRule qf rule
in [updFuncRule (const newrule) fdecl,
AFunc (toNoCheckQName qf) ar vis fty rule]
else [fdecl]
checkPreCondRule :: QName -> TARule -> TARule
checkPreCondRule qn (ARule rty rargs _) =
ARule rty rargs (addPreConditionCheck rty FuncCall qn rty
(map (\ (v,t) -> AVar t v) rargs))
checkPreCondRule qn (AExternal _ _) = error $
"addPreConditions: cannot add precondition to external operation '" ++
snd qn ++ "'!"
|
|
demand:
|
no demanded arguments
|
|
deterministic:
|
deterministic operation
|
|
documentation:
|
------------------------------------------------------------------------------
-- Add (non-trivial) preconditions:
-- If an operation `f` has some precondition `f'pre`,
-- replace the rule `f xs = rhs` by the following rules:
--
-- f xs = checkPreCond (f'NOCHECK xs) (f'pre xs) "f" xs
-- f'NOCHECK xs = rhs
|
|
failfree:
|
<FAILING>
|
|
indeterministic:
|
referentially transparent operation
|
|
infix:
|
no fixity defined
|
|
iotype:
|
{(_,_,_) |-> _}
|
|
name:
|
addPreConditions
|
|
precedence:
|
no precedence defined
|
|
result-values:
|
_
|
|
signature:
|
ToolOptions.Options -> FlatCurry.Annotated.Types.AProg FlatCurry.Types.TypeExpr
-> Data.IORef.IORef VerifierState.VState
-> Prelude.IO (FlatCurry.Annotated.Types.AProg FlatCurry.Types.TypeExpr)
|
|
solution-complete:
|
operation might suspend on free variables
|
|
terminating:
|
possibly non-terminating
|
|
totally-defined:
|
possibly non-reducible on same data term
|