X-Git-Url: https://git.stderr.nl/gitweb?a=blobdiff_plain;f=CoreTools.hs;h=4cafec1b34f8225870b4cb6b32af8ee03505936a;hb=e12f07ce9f854a28bfc5bd607644644da03fb8d3;hp=3dfaf5016cedb0ede442564d2e22452d9cc16e37;hpb=a89f11ef881be9280586aa92abc91639fd8cb9c5;p=matthijs%2Fmaster-project%2Fc%CE%BBash.git

diff --git a/CoreTools.hs b/CoreTools.hs
index 3dfaf50..4cafec1 100644
--- a/CoreTools.hs
+++ b/CoreTools.hs
@@ -3,7 +3,10 @@
 -- 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
@@ -19,8 +22,10 @@ import qualified DynFlags
 import qualified SrcLoc
 import qualified CoreSyn
 import qualified Var
+import qualified VarSet
 import qualified Unique
 import qualified CoreUtils
+import qualified CoreFVs
 
 import GhcTools
 import HsTools
@@ -61,24 +66,24 @@ sized_word_len ty =
 
 -- | 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
@@ -98,4 +103,22 @@ is_lam _ = False
 
 -- Is the given core expression of a function type?
 is_fun :: CoreSyn.CoreExpr -> Bool
-is_fun = Type.isFunTy . CoreUtils.exprType
+-- 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
+
+-- Does the given CoreExpr have any free type vars?
+has_free_tyvars :: CoreSyn.CoreExpr -> Bool
+has_free_tyvars = not . VarSet.isEmptyVarSet . (CoreFVs.exprSomeFreeVars Var.isTyVar)