implement expression handling further

+ Add some notes about returning functions that I started thinking about
  as a result of the fib example

1 files changed, 9 insertions, 1 deletions

diff --git a/lib/fwdlib.hpp b/lib/fwdlib.hpp
index 0462c52..034c91a 100644
--- a/lib/fwdlib.hpp
+++ b/lib/fwdlib.hpp
@@ -9,7 +9,15 @@
 
 using namespace std;
 
-static inline void fwd_getline(auto next)
+static void fwd_if(auto cond, auto ok, auto fail)
+{
+	if (cond)
+		ok();
+	else
+		fail();
+}
+
+static void fwd_getline(auto next)
 {
 	if (cin.eof())
 		next(optional<string>{});