Separated Turing machine implementation into components

* i.e. separate namespaces and headers for _Tape_ and _State_ functions
* `void` is now used as the `BLANK` field value

1 files changed, 2 insertions, 0 deletions

diff --git a/src/pair.h b/src/pair.h
index 8234382..6b2fe28 100644
--- a/src/pair.h
+++ b/src/pair.h
@@ -3,6 +3,8 @@
 
 #include <type_traits>
 
+#include "type.h"
+
 namespace tav {
 
 namespace detail { struct pair_tag { }; }