1 files changed, 33 insertions, 0 deletions
diff --git a/main/Main.hs b/main/Main.hs
new file mode 100644
index 0000000..58e475c
--- /dev/null
+++ b/main/Main.hs
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+module Main where
+
+import System.Exit
+
+import qualified CC.Parser
+import qualified CC.Typecheck
+import CC.Types
+
+
+-- Put the passes in a type-level list to be able to run subsequences of
+-- passes.
+
+
+type Pass a b = Context -> a -> Either String b
+
+pass :: (Read a, Show b, Show e) => (Context -> a -> Either e b) -> Pass a b
+pass f ctx a = either (Left . show) Right (f ctx a)
+
+passJoin :: (Read a, Show b, Read b, Show c) => Pass a b -> Pass b c -> Pass a c
+passJoin f1 f2 ctx a = f1 ctx a >>= f2 ctx
+
+main :: IO ()
+main = do
+    let parse = pass CC.Parser.runPass
+        typecheck = pass CC.Typecheck.runPass
+
+    let combined = parse `passJoin` typecheck
+
+    source <- getContents
+    let context = Context "<stdin>"
+    case combined context (read source) of
+        Right prog -> print prog
+        Left err -> die (show err)