Rollup merge of #32678 - mitaa:rdoc-stripped, r=alexcrichton

rustdoc: make rustdoc less pass-aware

Instead of hardcoding knowledge about the strip-private pass into the
rendering process we represent (some) stripped items as `ItemEnum::StrippedItem`.

Rustdoc will, for example, generate redirect pages for public items
contained in private modules which have been re-exported to somewhere
externally reachable - this will now not only work for the `strip-private`
pass, but for other passes as well, such as the `strip-hidden` pass.

r? @alexcrichton

src/test/auxiliary/reexp_stripped.rs

@@ -0,0 +1,21 @@
+// Copyright 2016 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.
+
+pub use private::Quz;
+pub use hidden::Bar;
+
+mod private {
+    pub struct Quz;
+}
+
+#[doc(hidden)]
+pub mod hidden {
+    pub struct Bar;
+}

src/test/rustdoc/redirect.rs

@@ -0,0 +1,48 @@
+// Copyright 2016 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.
+
+// aux-build:reexp_stripped.rs
+// build-aux-docs
+// ignore-cross-compile
+
+extern crate reexp_stripped;
+
+pub trait Foo {}
+
+// @has redirect/index.html
+// @has - '//code' 'pub use reexp_stripped::Bar'
+// @has - '//code/a' 'Bar'
+// @has reexp_stripped/hidden/struct.Bar.html
+// @has - '//p/a' '../../reexp_stripped/struct.Bar.html'
+// @has 'reexp_stripped/struct.Bar.html'
+#[doc(no_inline)]
+pub use reexp_stripped::Bar;
+impl Foo for Bar {}
+
+// @has redirect/index.html
+// @has - '//code' 'pub use reexp_stripped::Quz'
+// @has - '//code/a' 'Quz'
+// @has reexp_stripped/private/struct.Quz.html
+// @has - '//p/a' '../../reexp_stripped/struct.Quz.html'
+// @has 'reexp_stripped/struct.Quz.html'
+#[doc(no_inline)]
+pub use reexp_stripped::Quz;
+impl Foo for Quz {}
+
+mod private_no_inline {
+    pub struct Qux;
+    impl ::Foo for Qux {}
+}
+
+// @has redirect/index.html
+// @has - '//code' 'pub use private_no_inline::Qux'
+// @!has - '//code/a' 'Qux'
+#[doc(no_inline)]
+pub use private_no_inline::Qux;

src/test/rustdoc/structfields.rs

@@ -0,0 +1,44 @@
+// Copyright 2016 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.
+
+// @has structfields/struct.Foo.html
+pub struct Foo {
+    // @has - //pre "pub a: ()"
+    pub a: (),
+    // @has - //pre "// some fields omitted"
+    // @!has - //pre "b: ()"
+    b: (),
+    // @!has - //pre "c: usize"
+    #[doc(hidden)]
+    c: usize,
+    // @has - //pre "pub d: usize"
+    pub d: usize,
+}
+
+// @has structfields/struct.Bar.html
+pub struct Bar {
+    // @has - //pre "pub a: ()"
+    pub a: (),
+    // @!has - //pre "// some fields omitted"
+}
+
+// @has structfields/enum.Qux.html
+pub enum Qux {
+    Quz {
+        // @has - //pre "a: ()"
+        a: (),
+        // @!has - //pre "b: ()"
+        #[doc(hidden)]
+        b: (),
+        // @has - //pre "c: usize"
+        c: usize,
+        // @has - //pre "// some fields omitted"
+    },
+}