From a2438d04102e873bb6394bd1ca38448f52dd31bd Mon Sep 17 00:00:00 2001
From: Yoshua Wuyts <yoshuawuyts@gmail.com>
Date: Sun, 3 Jun 2018 23:16:49 +0200
Subject: [PATCH] create .bind_or()

---
 src/lib.rs | 11 +++++++++++
 1 file changed, 11 insertions(+)

diff --git a/src/lib.rs b/src/lib.rs
index 9606e62..f0ddce8 100644
--- a/src/lib.rs
+++ b/src/lib.rs
@@ -54,4 +54,15 @@ impl Port {
       _ => Err(io::Error::new(io::ErrorKind::Other, "No port supplied.")),
     }
   }
+
+  /// Create a TCP socket by calling to `.bind()`. If it fails, create a socket
+  /// on `port`.
+  ///
+  /// Useful to create a default socket to listen to if none was passed.
+  pub fn bind_or(&self, port: u16) -> std::io::Result<TcpListener> {
+    match self.bind() {
+      Ok(listener) => Ok(listener),
+      Err(_) => TcpListener::bind(("127.0.0.1", port)),
+    }
+  }
 }