Auto merge of #56407 - GuillaumeGomez:missing-docs-reexported-macros, r=varkor

check missing docs for reexported macros as well

Fixes #56334.

src/test/rustdoc-ui/deny-missing-docs-crate.rs

@@ -0,0 +1,13 @@
+// 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.
+
+#![deny(missing_docs)] //~ ERROR
+
+pub struct Foo; //~ ERROR

src/test/rustdoc-ui/deny-missing-docs-crate.stderr

@@ -0,0 +1,22 @@
+error: missing documentation for crate
+  --> $DIR/deny-missing-docs-crate.rs:11:1
+   |
+LL | / #![deny(missing_docs)] //~ ERROR
+LL | |
+LL | | pub struct Foo; //~ ERROR
+   | |_______________^
+   |
+note: lint level defined here
+  --> $DIR/deny-missing-docs-crate.rs:11:9
+   |
+LL | #![deny(missing_docs)] //~ ERROR
+   |         ^^^^^^^^^^^^
+
+error: missing documentation for a struct
+  --> $DIR/deny-missing-docs-crate.rs:13:1
+   |
+LL | pub struct Foo; //~ ERROR
+   | ^^^^^^^^^^^^^^^
+
+error: Compilation failed, aborting rustdoc
+

src/test/rustdoc-ui/deny-missing-docs-macro.rs

@@ -0,0 +1,18 @@
+// 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.
+
+//! foo
+
+#![deny(missing_docs)]
+
+#[macro_export]
+macro_rules! foo { //~ ERROR
+    () => {}
+}

src/test/rustdoc-ui/deny-missing-docs-macro.stderr

@@ -0,0 +1,14 @@
+error: missing documentation for macro
+  --> $DIR/deny-missing-docs-macro.rs:16:1
+   |
+LL | macro_rules! foo { //~ ERROR
+   | ^^^^^^^^^^^^^^^^
+   |
+note: lint level defined here
+  --> $DIR/deny-missing-docs-macro.rs:13:9
+   |
+LL | #![deny(missing_docs)]
+   |         ^^^^^^^^^^^^
+
+error: Compilation failed, aborting rustdoc
+