1 files changed, 4 insertions, 75 deletions

diff --git a/src/PPL/Sampling.hs b/src/PPL/Sampling.hs
index 6807439..9a749e9 100644
--- a/src/PPL/Sampling.hs
+++ b/src/PPL/Sampling.hs
@@ -6,7 +6,6 @@
 
 module PPL.Sampling
   ( mh,
-    ssmh,
   )
 where
 
@@ -15,7 +14,7 @@ import Control.Exception (evaluate)
 import Control.Monad.IO.Class
 import Control.Monad.Trans.State
 import Data.Bifunctor
-import qualified Data.Map.Strict as M
+import qualified Data.HashMap.Strict as M
 import Data.Monoid
 import GHC.Exts.Heap
 import Numeric.Log
@@ -50,7 +49,7 @@ mh g p m = do
       yield (x'', w'')
       step g2 omega'' x'' w''
     
-    mutate :: MonadIO m => StdGen -> IORef (M.Map [Int] Double, StdGen) ->  m (IORef (M.Map [Int] Double, StdGen))
+    mutate :: MonadIO m => StdGen -> IORef (M.HashMap [Int] Double, StdGen) ->  m (IORef (M.HashMap [Int] Double, StdGen))
     mutate g omega = do
       (m, g0) <- liftIO $ readIORef omega
       let (r:q:_) = R.randoms g
@@ -70,76 +69,6 @@ mh g p m = do
             pure y
           else do
             put g1
-            pure x
+            pure x  
+            
 
--- Single site MH
-
--- Truncated trees
-data TTree = TTree Bool [Maybe TTree] deriving (Show)
-
-type Site = [Int]
-
-trunc :: Tree -> IO TTree
-trunc = truncTree . asBox
-  where
-    truncTree t =
-      getBoxedClosureData' t >>= \case
-        ConstrClosure _ [l, r] [] _ _ "Tree" ->
-          getBoxedClosureData' l >>= \case
-            ConstrClosure {dataArgs = [d], name = "D#"} ->
-              TTree True <$> truncTrees r
-            x -> error $ "truncTree:ConstrClosure:" ++ show x
-        ConstrClosure _ [r] [d] _ _ "Tree" -> 
-          TTree False <$> truncTrees r
-        x -> error $ "truncTree:" ++ show x
-
-    getBoxedClosureData' x =
-      getBoxedClosureData x >>= \c -> case c of
-        BlackholeClosure _ t -> getBoxedClosureData' t
-        _ -> pure c
-
-    truncTrees b =
-      getBoxedClosureData' b >>= \case
-        ConstrClosure _ [l, r] [] _ _ ":" ->
-          getBoxedClosureData' l >>= \case
-            ConstrClosure {name = "Tree"} ->
-              ((:) . Just) <$> truncTree l <*>  truncTrees r
-            _ -> (Nothing :) <$> truncTrees r
-        _ -> pure []
-
-trunc' t x w = unsafePerformIO $ do
-  evaluate (rnf x)
-  evaluate (rnf w)
-  trunc t
-
-sites :: Site -> TTree -> [Site]
-sites acc (TTree eval ts) = (if eval then acc else mempty) : concat [sites (x : acc) t | (x, Just t) <- zip [0 ..] ts]
-
-mutate = M.foldrWithKey go
-  where
-    go [] d (Tree _ ts) = Tree d ts
-    go (n : ns) d (Tree v ts) = Tree v $ take n ts ++ go ns d (ts !! n) : drop (n + 1) ts
-
-ssmh :: (Show a, NFData a, Monad m) => StdGen -> Meas a -> Stream (Of (a, Log Double)) m ()
-ssmh g m = step t (mempty :: M.Map Site Double) (trunc' t0 x w) x w
-  where
-    (t0, t) = split $ randomTree g
-    (x, w) = head $ samples m t0
-
-    step !t !sub !tt !x !w = do
-      let ss = sites [] tt
-          (t1 : t2 : t3 : t4 : _) = splitTrees t
-          i = floor $ draw t2 * (fromIntegral $ length ss) -- site to mutate
-          sub' = M.insert (reverse $ ss !! i) (draw t3) sub
-          t' = mutate t0 sub'
-          (x', w') = head $ samples m t'
-          tt' = trunc' t' x' w'
-          ratio = w' / w
-          (Exp . log -> r) = draw t4
-          (sub'', tt'', x'', w'') =
-            if r < ratio
-              then (sub', tt', x', w')
-              else (sub, tt, x, w)
-
-      yield (x'', w'')
-      step t1 sub'' tt'' x'' w''