From 6932e61bc28510456dbee39d924e82adfe5d79fb Mon Sep 17 00:00:00 2001
From: iosmanthus <myosmanthustree@gmail.com>
Date: Mon, 10 Dec 2018 10:12:53 +0800
Subject: [PATCH] add functional feature

---
 e.rs | 12 ++++++++++--
 1 file changed, 10 insertions(+), 2 deletions(-)

diff --git a/e.rs b/e.rs
index 7ca3efe..3a363be 100644
--- a/e.rs
+++ b/e.rs
@@ -1,7 +1,15 @@
-#![feature(main)]
-#[main]
+#[cfg(feature = "functional")]
+fn e() {
+    std::iter::repeat('e').for_each(|e| print!("{}", e))
+}
+
+#[cfg(not(feature = "functional"))]
 fn e() {
     loop {
         print!("e");
     }
 }
+
+fn main() {
+    e();
+}