monor fixes, sepated caching eval

escher/Eval.hs

@@ -115,11 +115,13 @@ eval conf (InputE i) = do if i < 0 || i >= length (confInput conf) -- NOTE: repl
 eval _ Hole = FatalError "can't eval hole"
 
 
-type Cache = Map Expr (Result Value)
-
-eval' :: Cache -> Conf -> Expr -> (Result Value, Cache)
-eval' cache conf expr = case expr `Map.lookup` cache of
-                          Just result -> (result, cache)
-                          Nothing -> let result = eval conf expr in
-                                     (result, Map.insert expr result cache)
+type Cache = Map ([Value], Expr) (Result Value)
 
+cachedEval :: Cache -> Conf -> Expr -> (Result Value, Cache)
+cachedEval cache conf expr = let input = confInput conf in
+                             case (input, expr) `Map.lookup` cache of
+                              Just result -> (result, cache)
+                              Nothing -> let result = eval conf expr in
+                                         (result, if isResult result
+                                                  then Map.insert (input, expr) result cache
+                                                  else cache)

escher/Main.hs

@@ -16,21 +16,26 @@ import Debug.Trace (trace)
 import TypeCheck
 
 
-eval'' :: Conf -> Expr -> SyntState (Result Value)
-eval'' conf expr = do cache <- gets syntCache
-                      let (result, cache') = eval' cache conf expr
-                      modify $ \st -> st {syntCache = cache'}
-                      return result
+syntEval :: [Value] -> Expr -> SyntState (Result Value)
+syntEval input expr = do cache <- gets syntCache
+                         conf <- gets $ confBySynt input expr
+                         return $ eval conf expr
 
+syntCacheEval :: [Value] -> Expr -> SyntState (Result Value)
+syntCacheEval input expr = do cache <- gets syntCache
+                              conf <- gets $ confBySynt input expr
+                              let (result, cache') = cachedEval cache conf expr
+                              modify $ \st -> st {syntCache = cache'}
+                              return result
 
 ------------
 
-matchGoal :: Goal -> Expr -> Synt -> Bool
-matchGoal (Goal goal) expr st = let examples = syntExamples st in
-                                foldl checkOnInput True $ zip examples goal
-  where checkOnInput False _ = False
-        checkOnInput acc (input, output) = let output' = eval (confBySynt input expr st) expr in
-                                           matchValue output' output -- TODO
+matchGoal :: Goal -> Expr -> SyntState Bool
+matchGoal (Goal goal) expr = do examples <- gets syntExamples
+                                foldM checkOnInput True $ zip examples goal
+  where checkOnInput False _ = return False
+        checkOnInput acc (input, output) = do output' <- syntEval input expr
+                                              return $ matchValue output' output -- TODO
         matchValue (Result x) (Just y) = x == y
         matchValue _ Nothing = True
         matchValue _ _ = False
@@ -38,7 +43,12 @@ matchGoal (Goal goal) expr st = let examples = syntExamples st in
 ------ syntesis steps
 
 calcExprOutputs :: Expr -> SyntState [Result Value]
-calcExprOutputs expr = gets (\st -> map (\input -> eval (confBySynt input expr st) expr) $ syntExamples st)
+calcExprOutputs expr = do examples <- gets syntExamples
+                          mapM (`syntEval` expr) examples
+
+calcTemporaryExprOutputs :: Expr -> SyntState [Result Value]
+calcTemporaryExprOutputs expr = do examples <- gets syntExamples
+                                   mapM (`syntEval` expr) examples
 
 matchAnyOutputs :: [Result Value] -> SyntState Bool
 matchAnyOutputs outputs = do exprs <- gets syntExprs
@@ -55,11 +65,15 @@ matchAnyOutputs outputs = do exprs <- gets syntExprs
 forwardStep :: Expr -> [Expr] -> SyntState (Maybe Expr)
 forwardStep comp args = do let expr = fillHoles comp args
                            typeConf <- gets $ oracleTypes . syntOracle
-                           if isNothing $ checkType typeConf expr then return Nothing else do
-                             outputs <- calcExprOutputs expr
-                             matchedExisting <- gets $ evalState (matchAnyOutputs outputs)
+                           if isNothing $ checkType typeConf expr
+                           then return Nothing
+                           else do
+                             outputs <- calcTemporaryExprOutputs expr
+                             matchedExisting <- matchAnyOutputs outputs
                              -- TODO: all RecErrors example could be useful on future cases ?
-                             if any isFatalError outputs || all isRecError outputs || matchedExisting then return Nothing else do
+                             if matchedExisting || any isFatalError outputs || all isRecError outputs
+                             then return Nothing
+                             else do
                                modify $ \st -> st { syntExprs = (expr, []) : syntExprs st}
                                return $ Just expr
 
@@ -74,7 +88,8 @@ splitGoal resolverGoal@(Goal outputs) selector | length outputs == length select
 splitGoalStep :: Goal -> [Bool]  -> SyntState Resolver
 splitGoalStep goal selector = do let r = splitGoal goal selector
                                  resolvers <- gets syntResolvers
-                                 unless (r `elem` resolvers) $ -- do not add existing resolvers
+                                 unless (r `elem` resolvers) $ -- do not add existing resolvers -- do not add existing resolvers
+                                    -- do not add existing resolvers
                                    modify $ \st -> st { syntUnsolvedGoals = Set.insert (resolverCond r) $
                                                                             Set.insert (resolverThen r) $
                                                                             Set.insert (resolverElse r) $
@@ -84,7 +99,7 @@ splitGoalStep goal selector = do let r = splitGoal goal selector
 
 -- TODO: use expr evaluated outputs ?
 trySolveGoal :: Expr -> Goal -> SyntState Bool
-trySolveGoal expr goal = do doesMatch <- gets $ matchGoal goal expr
+trySolveGoal expr goal = do doesMatch <- matchGoal goal expr
                             if doesMatch then do
                               modify $ \st -> st { syntSolvedGoals = Map.insert goal expr $ syntSolvedGoals st --,
                                                    -- syntUnsolvedGoals = Set.delete goal $ syntUnsolvedGoals st
@@ -133,19 +148,24 @@ remakeSynt newInputs newOutputs = do st <- get
 -- clear goal tree up to root, add example, calculate exprs on input (could be recursive ?)
 -- returns new example
 saturateStep :: Expr -> SyntState [[Value]]
-saturateStep expr = do (newInputs, newOutputs) <- gets $ \st -> unzip $ foldl (searchEx st) [] (syntExamples st)
+saturateStep expr = do examples <- gets syntExamples
+                       (newInputs, newOutputs) <- unzip <$> foldM searchEx [] examples
                        let exFound = not . null $ newInputs
                        when exFound $ remakeSynt newInputs newOutputs
                        return newInputs
-    where searchEx st [] input = case eval (confBySynt input expr st) expr of
-                                           NewExamples exs -> exs
-                                           _ -> []
-          searchEx _ exs _ = exs
+    where searchEx [] input = do output <- syntEval input expr
+                                 return $ case output of
+                                   NewExamples exs -> exs
+                                   _ -> []
+          searchEx exs _ = return exs
 
 -- try to find terminating expr
 terminateStep :: Expr -> SyntState (Maybe Expr)
-terminateStep expr = do doesMatch <- gets $ \st -> matchGoal (syntRoot st) expr st
-                        return $ if doesMatch then Just expr else Nothing
+terminateStep expr = do rootGoal <- gets syntRoot
+                        gets $ Map.lookup rootGoal . syntSolvedGoals
+                        -- NOTE: Goal should be already solved earlier
+                        -- doesMatch <- matchGoal rootGoal expr
+                        -- return $ if doesMatch then Just expr else Nothing
 
 stepOnAddedExpr :: Expr -> SyntState (Maybe Expr)
 stepOnAddedExpr expr = do newEx <- saturateStep expr