1 files changed, 38 insertions, 0 deletions
diff --git a/src/tools/rustfmt/tests/target/comment-not-disappear.rs b/src/tools/rustfmt/tests/target/comment-not-disappear.rs
new file mode 100644
index 000000000..b1fa0ff6f
--- /dev/null
+++ b/src/tools/rustfmt/tests/target/comment-not-disappear.rs
@@ -0,0 +1,38 @@
+// All the comments here should not disappear.
+
+fn a() {
+    match x {
+        X |
+        // A comment
+        Y => {}
+    };
+}
+
+fn b() {
+    match x {
+        X =>
+        // A comment
+        {
+            y
+        }
+    }
+}
+
+fn c() {
+    a() /* ... */;
+}
+
+fn foo() -> Vec<i32> {
+    (0..11)
+        .map(|x|
+        // This comment disappears.
+        if x % 2 == 0 { x } else { x * 2 })
+        .collect()
+}
+
+fn calc_page_len(prefix_len: usize, sofar: usize) -> usize {
+    2 // page type and flags
+    + 1 // stored depth
+    + 2 // stored count
+    + prefix_len + sofar // sum of size of all the actual items
+}