Auto merge of #50030 - flip1995:rfc2103, r=petrochenkov

Implement tool_attributes feature (RFC 2103)

cc #44690

This is currently just a rebased and compiling (hopefully) version of #47773.

Let's see if travis likes this. I will add the implementation for `tool_lints` this week.

1 files changed, 23 insertions, 0 deletions

diff --git a/src/test/run-pass/tool_attributes.rs b/src/test/run-pass/tool_attributes.rs
new file mode 100644
index 00000000000..eb13930de40
--- /dev/null
+++ b/src/test/run-pass/tool_attributes.rs
@@ -0,0 +1,23 @@
+// 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.
+
+// Scoped attributes should not trigger an unused attributes lint.
+
+#![feature(tool_attributes)]
+#![deny(unused_attributes)]
+
+fn main() {
+    #[rustfmt::skip]
+    foo ();
+}
+
+fn foo() {
+    assert!(true);
+}