---

yaml
---
r: 120391
b: refs/heads/dist-snap
c: 27d8ea0
h: refs/heads/master
i:
  120389: 7adf565
  120387: 2761e81
  120383: c3a8228
v: v3

Author: alexcrichton

[refs]

@@ -6,7 +6,7 @@ refs/heads/try: 1813e5aa1a03b0596b8de7abd1af31edf5d6098f
 refs/tags/release-0.1: 1f5c5126e96c79d22cb7862f75304136e204f105
 refs/heads/ndm: f3868061cd7988080c30d6d5bf352a5a5fe2460b
 refs/heads/try2: 147ecfdd8221e4a4d4e090486829a06da1e0ca3c
-refs/heads/dist-snap: f2af4ca3e65ebef040df633c9d563b579540898e
+refs/heads/dist-snap: 27d8ea05a257af534579c5ecef79d45781f3a8f0
 refs/tags/release-0.2: c870d2dffb391e14efb05aa27898f1f6333a9596
 refs/tags/release-0.3: b5f0d0f648d9a6153664837026ba1be43d3e2503
 refs/heads/try3: 9387340aab40a73e8424c48fd42f0c521a4875c0

branches/dist-snap/src/libcore/macros.rs

@@ -59,3 +59,9 @@ macro_rules! assert(
 macro_rules! debug_assert(
     ($($arg:tt)*) => (if cfg!(not(ndebug)) { assert!($($arg)*); })
 )
+
+/// Short circuiting evaluation on Err
+#[macro_export]
+macro_rules! try(
+    ($e:expr) => (match $e { Ok(e) => e, Err(e) => return Err(e) })
+)