From 064ec35c18f396c2c26c05517290fdc1a4379586 Mon Sep 17 00:00:00 2001
From: Jorge Aparicio <japaricious@gmail.com>
Date: Sat, 26 Mar 2016 12:10:16 -0500
Subject: [PATCH] add regression test for try!

---
 src/test/run-pass/try-macro.rs | 57 ++++++++++++++++++++++++++++++++++
 1 file changed, 57 insertions(+)
 create mode 100644 src/test/run-pass/try-macro.rs

diff --git a/src/test/run-pass/try-macro.rs b/src/test/run-pass/try-macro.rs
new file mode 100644
index 00000000000..a12e20702d2
--- /dev/null
+++ b/src/test/run-pass/try-macro.rs
@@ -0,0 +1,57 @@
+// Copyright 2016 The Rust Project Developers. See the COPYRIGHT
+// file at the top-level directory of this distribution and at
+// http://rust-lang.org/COPYRIGHT.
+//
+// Licensed under the Apache License, Version 2.0 <LICENSE-APACHE or
+// http://www.apache.org/licenses/LICENSE-2.0> or the MIT license
+// <LICENSE-MIT or http://opensource.org/licenses/MIT>, at your
+// option. This file may not be copied, modified, or distributed
+// except according to those terms.
+
+use std::num::{ParseFloatError, ParseIntError};
+
+fn main() {
+    assert_eq!(simple(), Ok(1));
+    assert_eq!(nested(), Ok(2));
+    assert_eq!(merge_ok(), Ok(3.0));
+    assert_eq!(merge_int_err(), Err(Error::Int));
+    assert_eq!(merge_float_err(), Err(Error::Float));
+}
+
+fn simple() -> Result<i32, ParseIntError> {
+    Ok(try!("1".parse()))
+}
+
+fn nested() -> Result<i32, ParseIntError> {
+    Ok(try!(try!("2".parse::<i32>()).to_string().parse::<i32>()))
+}
+
+fn merge_ok() -> Result<f32, Error> {
+    Ok(try!("1".parse::<i32>()) as f32 + try!("2.0".parse::<f32>()))
+}
+
+fn merge_int_err() -> Result<f32, Error> {
+    Ok(try!("a".parse::<i32>()) as f32 + try!("2.0".parse::<f32>()))
+}
+
+fn merge_float_err() -> Result<f32, Error> {
+    Ok(try!("1".parse::<i32>()) as f32 + try!("b".parse::<f32>()))
+}
+
+#[derive(Debug, PartialEq)]
+enum Error {
+    Int,
+    Float,
+}
+
+impl From<ParseIntError> for Error {
+    fn from(_: ParseIntError) -> Error {
+        Error::Int
+    }
+}
+
+impl From<ParseFloatError> for Error {
+    fn from(_: ParseFloatError) -> Error {
+        Error::Float
+    }
+}