import TcType ( Type, mkFunTys, mkForAllTys, mkTyConApp,
mkFunTy, tcSplitTyConApp_maybe, tcSplitIOType_maybe,
tcSplitForAllTys, tcSplitFunTys, tcTyConAppArgs,
+ isBoolTy
)
import BasicTypes ( Boxity(..) )
ccallConvAttribute
)
import TysWiredIn ( unitTy, tupleTyCon )
-import TysPrim ( addrPrimTy, mkStablePtrPrimTy, alphaTy )
+import TysPrim ( addrPrimTy, mkStablePtrPrimTy, alphaTy, intPrimTy )
import PrelNames ( stablePtrTyConName, newStablePtrName, bindIOName,
checkDotnetResName )
import BasicTypes ( Activation( NeverActive ) )
typeMachRep addrPrimTy)
-- This function returns the primitive type associated with the boxed
--- type argument to a foreign export (eg. Int ==> Int#). It assumes
--- that all the types we are interested in have a single constructor
--- with a single primitive-typed argument, which is true for all of the legal
--- foreign export argument types (see TcType.legalFEArgTyCon).
+-- type argument to a foreign export (eg. Int ==> Int#).
getPrimTyOf :: Type -> Type
-getPrimTyOf ty =
- case splitProductType_maybe (repType ty) of
+getPrimTyOf ty
+ | isBoolTy rep_ty = intPrimTy
+ -- Except for Bool, the types we are interested in have a single constructor
+ -- with a single primitive-typed argument (see TcType.legalFEArgTyCon).
+ | otherwise =
+ case splitProductType_maybe rep_ty of
Just (_, _, data_con, [prim_ty]) ->
ASSERT(dataConSourceArity data_con == 1)
ASSERT2(isUnLiftedType prim_ty, ppr prim_ty)
prim_ty
_other -> pprPanic "DsForeign.getPrimTyOf" (ppr ty)
+ where
+ rep_ty = repType ty
\end{code}