Update upstream source from tag 'upstream/1.52.1+dfsg1'

[rustc.git] / src / tools / clippy / tests / ui / result_map_or_into_option.rs

diff --git a/src/tools/clippy/tests/ui/result_map_or_into_option.rs b/src/tools/clippy/tests/ui/result_map_or_into_option.rs
new file mode 100644 (file)
index 0000000..3058480
--- /dev/null
+++ b/src/tools/clippy/tests/ui/result_map_or_into_option.rs
@@ -0,0 +1,19 @@
+// run-rustfix
+
+#![warn(clippy::result_map_or_into_option)]
+
+fn main() {
+    let opt: Result<u32, &str> = Ok(1);
+    let _ = opt.map_or(None, Some);
+
+    let rewrap = |s: u32| -> Option<u32> { Some(s) };
+
+    // A non-Some `f` arg should not emit the lint
+    let opt: Result<u32, &str> = Ok(1);
+    let _ = opt.map_or(None, rewrap);
+
+    // A non-Some `f` closure where the argument is not used as the
+    // return should not emit the lint
+    let opt: Result<u32, &str> = Ok(1);
+    opt.map_or(None, |_x| Some(1));
+}