September 2017 Update

Task/Function-composition/Rust/function-composition-2.rust

@@ -0,0 +1,7 @@
+#![feature(conservative_impl_trait)]
+fn compose<'a,F,G,T,U,V>(f: F, g: G) -> impl Fn(T) -> V + 'a
+    where F: Fn(U) -> V + 'a,
+          G: Fn(T) -> U + 'a,
+{
+   move |x| f(g(x))
+}