1 files changed, 38 insertions, 0 deletions
diff --git a/src/tools/rustfmt/tests/target/comments-fn.rs b/src/tools/rustfmt/tests/target/comments-fn.rs
new file mode 100644
index 000000000..1f43bd93b
--- /dev/null
+++ b/src/tools/rustfmt/tests/target/comments-fn.rs
@@ -0,0 +1,38 @@
+// Test comments on functions are preserved.
+
+// Comment on foo.
+fn foo<F, G>(
+    a: aaaaaaaaaaaaa, // A comment
+    b: bbbbbbbbbbbbb, // a second comment
+    c: ccccccccccccc,
+    // Newline comment
+    d: ddddddddddddd,
+    //  A multi line comment
+    // between args.
+    e: eeeeeeeeeeeee, /* comment before paren */
+) -> bar
+where
+    F: Foo, // COmment after where-clause
+    G: Goo, // final comment
+{
+}
+
+fn bar<F /* comment on F */, G /* comment on G */>() {}
+
+fn baz() -> Baz /* Comment after return type */ {}
+
+fn some_fn<T>()
+where
+    T: Eq, // some comment
+{
+}
+
+fn issue458<F>(a: &str, f: F)
+// comment1
+where
+    // comment2
+    F: FnOnce(&str) -> bool,
+{
+    f(a);
+    ()
+}