1 files changed, 15 insertions, 0 deletions
diff --git a/src/Haskell/Env/Context.hs b/src/Haskell/Env/Context.hs
new file mode 100644
index 0000000..2e6b6cc
--- /dev/null
+++ b/src/Haskell/Env/Context.hs
@@ -0,0 +1,15 @@
+module Haskell.Env.Context where
+
+import Haskell.Env
+import Haskell.Env.Cmd
+
+
+data Context = Context { cStack :: [(Action, Env)], cBaseEnv :: Env }
+  deriving (Show)
+
+topEnv :: Context -> Env
+topEnv (Context [] env) = env
+topEnv (Context ((_, env):_) _) = env
+
+pushCtx :: (Action, Env) -> Context -> Context
+pushCtx pair ctx = ctx { cStack = pair : cStack ctx }