From: Alex Crichton <alex@alexcrichton.com>
Date: Fri, 9 Jan 2015 21:26:21 +0000 (-0800)
Subject: syntax: Add #[allow(unstable)] to --test expansion
X-Git-Url: https://git.lizzy.rs/?a=commitdiff_plain;h=9cc847d8c3cb156a2765a6be962209acd472b8aa;p=rust.git

syntax: Add #[allow(unstable)] to --test expansion

This will temporarily prevent warnings generated from expanding to code that the
test harness itself uses. This solution will require tweaking around the beta
cycle, but it will prevent spurious warnings for now.

Closes #20823
---

diff --git a/src/libsyntax/test.rs b/src/libsyntax/test.rs
index bacfa0bbfce..895268f96c8 100644
--- a/src/libsyntax/test.rs
+++ b/src/libsyntax/test.rs
@@ -439,13 +439,19 @@ pub fn main() {
     let item_ = ast::ItemMod(testmod);
 
     let mod_ident = token::gensym_ident("__test");
+    let allow_unstable = {
+        let unstable = P(nospan(ast::MetaWord(InternedString::new("unstable"))));
+        let allow = P(nospan(ast::MetaList(InternedString::new("allow"),
+                                           vec![unstable])));
+        attr::mk_attr_inner(attr::mk_attr_id(), allow)
+    };
     let item = ast::Item {
         ident: mod_ident,
-        attrs: Vec::new(),
         id: ast::DUMMY_NODE_ID,
         node: item_,
         vis: ast::Public,
         span: DUMMY_SP,
+        attrs: vec![allow_unstable],
     };
     let reexport = cx.reexport_test_harness_main.as_ref().map(|s| {
         // building `use <ident> = __test::main`
diff --git a/src/test/run-pass/issue-20823.rs b/src/test/run-pass/issue-20823.rs
new file mode 100644
index 00000000000..73b7fc264a5
--- /dev/null
+++ b/src/test/run-pass/issue-20823.rs
@@ -0,0 +1,16 @@
+// Copyright 2015 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.
+
+// compile-flags: --test
+
+#![deny(unstable)]
+
+#[test]
+fn foo() {}