X-Git-Url: https://git.stderr.nl/gitweb?a=blobdiff_plain;f=CoreTools.hs;h=a9114565c9aca9c732bc1c73848637b53a787f79;hb=8ebcc3ed9b394000ccd07ffeb541f791444dfbc2;hp=1e65b0d6b0b95da582669c5774366e750bbc4c76;hpb=ed1bae43e489cc20a6be9dd5e007bb7d7b6a95dc;p=matthijs%2Fmaster-project%2Fc%CE%BBash.git

diff --git a/CoreTools.hs b/CoreTools.hs
index 1e65b0d..a911456 100644
--- a/CoreTools.hs
+++ b/CoreTools.hs
@@ -54,3 +54,18 @@ sized_word_len ty =
     (tycon, args) = Type.splitTyConApp ty
     [len] = args
 
+-- | 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