From 5efe083ddca3bfa09e583ae7396f8af8c52b43eb Mon Sep 17 00:00:00 2001
From: Tobias Bucher <tobiasbucher5991@gmail.com>
Date: Fri, 15 Apr 2016 17:58:59 +0200
Subject: [PATCH] Add `Default` implementation for `&CStr` and `CString`

---
 src/libstd/ffi/c_str.rs | 16 ++++++++++++++++
 1 file changed, 16 insertions(+)

diff --git a/src/libstd/ffi/c_str.rs b/src/libstd/ffi/c_str.rs
index 52d7bb128d5..fbc8886ce8f 100644
--- a/src/libstd/ffi/c_str.rs
+++ b/src/libstd/ffi/c_str.rs
@@ -326,6 +326,22 @@ fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
     }
 }
 
+#[stable(feature = "cstr_default", since = "1.10.0")]
+impl<'a> Default for &'a CStr {
+    fn default() -> &'a CStr {
+        static SLICE: &'static [c_char] = &[0];
+        unsafe { CStr::from_ptr(SLICE.as_ptr()) }
+    }
+}
+
+#[stable(feature = "cstr_default", since = "1.10.0")]
+impl Default for CString {
+    fn default() -> CString {
+        let a: &CStr = Default::default();
+        a.to_owned()
+    }
+}
+
 #[stable(feature = "cstr_borrow", since = "1.3.0")]
 impl Borrow<CStr> for CString {
     fn borrow(&self) -> &CStr { self }
-- 
2.44.0