1 files changed, 16 insertions, 5 deletions
diff --git a/app/Builtins.hs b/app/Builtins.hs
index 06c35a3..9e4215c 100644
--- a/app/Builtins.hs
+++ b/app/Builtins.hs
@@ -1,15 +1,19 @@
 module Builtins where
 
 import Code
+import Control.Monad.IO.Class
 import Control.Monad.Trans.State.Lazy
 import qualified Data.Map as M
-import Env
+import Env hiding (PrlgEnv)
+import Interpreter (backtrack)
 import qualified Operators as O
 
-import Debug.Trace
+bi = Builtin
 
-hello :: BuiltinFunc
-hello = BuiltinFunc $ trace "hllo prlg"
+hello =
+  bi $ do
+    liftIO $ putStrLn "hllo prlg"
+    return Nothing
 
 addBuiltins :: PrlgEnv ()
 addBuiltins = do
@@ -21,6 +25,9 @@ addBuiltins = do
   any1 <- findStruct "any" 1
   eq2 <- findStruct "=" 2
   hello0 <- findStruct "hello" 0
+  fail0 <- findStruct "fail" 0
+  true0 <- findStruct "true" 0
+  prlgstate0 <- findStruct "prlgstate" 0
   modify $ \s ->
     s
       { defs =
@@ -32,7 +39,11 @@ addBuiltins = do
                 , [Goal, U (Struct a1), U (Atom b), LastCall]
                 ])
             , (any1, [[U (VoidRef Nothing), NoGoal]])
-            , (hello0, [[Builtin hello]])
+            , (hello0, [[Invoke hello]])
+            , (fail0, [[Invoke $ bi backtrack]])
+            , (true0, [[Invoke $ bi (pure Nothing)]])
+            , ( prlgstate0
+              , [[Invoke $ bi (get >>= liftIO . print >> pure Nothing)]])
             ]
       , ops = [(O.xfy "," 1000), (O.xfx "=" 700)]
       }