working on adding type system

boring/main.py

@@ -0,0 +1,25 @@
+import sys
+from typing import List
+from boring.parse import boring_parser, TreeToBoring, pretty_print
+from boring.type_checker import TypeCheckTableBuilder, TypeComparison, check_types
+
+if __name__ == "__main__":
+    with open(sys.argv[1]) as f:
+        tree = boring_parser.parse(f.read())
+        # print(tree)
+        result = TreeToBoring().transform(tree)
+        pretty_print(result)
+        tctb = TypeCheckTableBuilder()
+        table: List[TypeComparison] = []
+        tctb.with_module({}, table, result)
+        for e in table:
+            print(e)
+        print('^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^')
+        check_types(table)
+        print('vvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvv')
+        for e in table:
+            print(e)
+
+#        None, Some
+#  None  skip, set
+#  Some  set, check