set the syntax edition in the driver's phase 1

1 files changed, 24 insertions, 0 deletions

diff --git a/src/test/rustdoc/async-fn.rs b/src/test/rustdoc/async-fn.rs
new file mode 100644
index 00000000000..21ad5159946
--- /dev/null
+++ b/src/test/rustdoc/async-fn.rs
@@ -0,0 +1,24 @@
+// Copyright 2018 The Rust Project Developers. See the COPYRIGHT
+// file at the top-level directory of this distribution and at
+// http://rust-lang.org/COPYRIGHT.
+//
+// Licensed under the Apache License, Version 2.0 <LICENSE-APACHE or
+// http://www.apache.org/licenses/LICENSE-2.0> or the MIT license
+// <LICENSE-MIT or http://opensource.org/licenses/MIT>, at your
+// option. This file may not be copied, modified, or distributed
+// except according to those terms.
+
+// edition:2018
+// compile-flags:-Z unstable-options
+
+// FIXME: once `--edition` is stable in rustdoc, remove that `compile-flags` directive
+
+#![feature(rust_2018_preview, async_await, futures_api)]
+
+// @has async_fn/struct.S.html
+// @has - '//code' 'pub async fn f()'
+pub struct S;
+
+impl S {
+    pub async fn f() {}
+}