add types to parser

+ No actual type checking is implemented as of yet, but with references
  and pointers I should be able to start playing around with checking
  move semantics and so on

+ Might at some point also look into type propagation for let,
  annoying to have to specify the same thing twice.

1 files changed, 1 insertions, 0 deletions

diff --git a/lib/fwdlib.hpp b/lib/fwdlib.hpp
index 034c91a..3efac61 100644
--- a/lib/fwdlib.hpp
+++ b/lib/fwdlib.hpp
@@ -4,6 +4,7 @@
 #include <string>
 #include <optional>
 #include <iostream>
+#include <functional>
 #include <unordered_map>
 #include <unordered_set>