New upstream version 1.52.1+dfsg1

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

diff --git a/src/tools/clippy/tests/ui/iter_next_slice.rs b/src/tools/clippy/tests/ui/iter_next_slice.rs
new file mode 100644 (file)
index 0000000..ef9a55f
--- /dev/null
+++ b/src/tools/clippy/tests/ui/iter_next_slice.rs
@@ -0,0 +1,24 @@
+// run-rustfix
+#![warn(clippy::iter_next_slice)]
+
+fn main() {
+    // test code goes here
+    let s = [1, 2, 3];
+    let v = vec![1, 2, 3];
+
+    s.iter().next();
+    // Should be replaced by s.get(0)
+
+    s[2..].iter().next();
+    // Should be replaced by s.get(2)
+
+    v[5..].iter().next();
+    // Should be replaced by v.get(5)
+
+    v.iter().next();
+    // Should be replaced by v.get(0)
+
+    let o = Some(5);
+    o.iter().next();
+    // Shouldn't be linted since this is not a Slice or an Array
+}