-- Core and Haskell (it uses HsTools for this), but only the functions that
-- know about various libraries and know which functions to call.
module CoreTools where
-
+
+--Standard modules
+import qualified Maybe
+
-- GHC API
import qualified GHC
import qualified Type
import qualified CoreSyn
import qualified Var
import qualified Unique
+import qualified CoreUtils
import GhcTools
import HsTools
-- | Evaluate a core Type representing type level int from the TypeLevel
-- library to a real int.
-eval_type_level_int :: Type.Type -> Int
-eval_type_level_int ty =
- unsafeRunGhc $ do
- -- Automatically import modules for any fully qualified identifiers
- setDynFlag DynFlags.Opt_ImplicitImportQualified
-
- let to_int_name = mkRdrName "Data.TypeLevel.Num.Sets" "toInt"
- let to_int = SrcLoc.noLoc $ HsExpr.HsVar to_int_name
- let undef = hsTypedUndef $ coreToHsType ty
- let app = HsExpr.HsApp (to_int) (undef)
-
- core <- toCore [] app
- execCore core
+-- eval_type_level_int :: Type.Type -> Int
+-- eval_type_level_int ty =
+-- unsafeRunGhc $ do
+-- -- Automatically import modules for any fully qualified identifiers
+-- setDynFlag DynFlags.Opt_ImplicitImportQualified
+--
+-- let to_int_name = mkRdrName "Data.TypeLevel.Num.Sets" "toInt"
+-- let to_int = SrcLoc.noLoc $ HsExpr.HsVar to_int_name
+-- let undef = hsTypedUndef $ coreToHsType ty
+-- let app = HsExpr.HsApp (to_int) (undef)
+--
+-- core <- toCore [] app
+-- execCore core
-- | Get the length of a FSVec type
-fsvec_len :: Type.Type -> Int
-fsvec_len ty =
- eval_type_level_int len
+tfvec_len :: Type.Type -> Int
+tfvec_len ty =
+ eval_tfp_int len
where
(tycon, args) = Type.splitTyConApp ty
[len, el_ty] = args
-- occstring for now... TODO
--(Var.varUnique bndr) == (Unique.mkBuiltinUnique 1)
is_wild bndr = "wild" == (OccName.occNameString . Name.nameOccName . Var.varName) bndr
+
+-- Is the given core expression a lambda abstraction?
+is_lam :: CoreSyn.CoreExpr -> Bool
+is_lam (CoreSyn.Lam _ _) = True
+is_lam _ = False
+
+-- Is the given core expression of a function type?
+is_fun :: CoreSyn.CoreExpr -> Bool
+-- Treat Type arguments differently, because exprType is not defined for them.
+is_fun (CoreSyn.Type _) = False
+is_fun expr = (Type.isFunTy . CoreUtils.exprType) expr
+
+-- Is the given core expression polymorphic (i.e., does it accept type
+-- arguments?).
+is_poly :: CoreSyn.CoreExpr -> Bool
+-- Treat Type arguments differently, because exprType is not defined for them.
+is_poly (CoreSyn.Type _) = False
+is_poly expr = (Maybe.isJust . Type.splitForAllTy_maybe . CoreUtils.exprType) expr
+
+-- Is the given core expression a variable reference?
+is_var :: CoreSyn.CoreExpr -> Bool
+is_var (CoreSyn.Var _) = True
+is_var _ = False
+