Merging upstream version 1.68.2+dfsg1.

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 49 insertions, 0 deletions

diff --git a/tests/ui/macros/try-macro.rs b/tests/ui/macros/try-macro.rs
new file mode 100644
index 000000000..824c77d9d
--- /dev/null
+++ b/tests/ui/macros/try-macro.rs
@@ -0,0 +1,49 @@
+// run-pass
+#![allow(deprecated)] // for deprecated `try!()` macro
+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
+    }
+}