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

[rustc.git] / src / tools / clippy / tests / ui / comparison_to_empty.fixed

diff --git a/src/tools/clippy/tests/ui/comparison_to_empty.fixed b/src/tools/clippy/tests/ui/comparison_to_empty.fixed
new file mode 100644 (file)
index 0000000..261024c
--- /dev/null
+++ b/src/tools/clippy/tests/ui/comparison_to_empty.fixed
@@ -0,0 +1,23 @@
+// run-rustfix
+
+#![warn(clippy::comparison_to_empty)]
+
+fn main() {
+    // Disallow comparisons to empty
+    let s = String::new();
+    let _ = s.is_empty();
+    let _ = !s.is_empty();
+
+    let v = vec![0];
+    let _ = v.is_empty();
+    let _ = !v.is_empty();
+
+    // Allow comparisons to non-empty
+    let s = String::new();
+    let _ = s == " ";
+    let _ = s != " ";
+
+    let v = vec![0];
+    let _ = v == [0];
+    let _ = v != [0];
+}