add test for proc-macro re-export

Author: QuietMisdreavus

src/test/rustdoc/inline_cross/auxiliary/proc_macro.rs

@@ -0,0 +1,37 @@
+// 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.
+
+// no-prefer-dynamic
+
+#![crate_type="proc-macro"]
+#![crate_name="some_macros"]
+
+extern crate proc_macro;
+
+use proc_macro::TokenStream;
+
+/// a proc-macro that swallows its input and does nothing.
+#[proc_macro]
+pub fn some_proc_macro(_input: TokenStream) -> TokenStream {
+    TokenStream::new()
+}
+
+/// a proc-macro attribute that passes its item through verbatim.
+#[proc_macro_attribute]
+pub fn some_proc_attr(_attr: TokenStream, item: TokenStream) -> TokenStream {
+    item
+}
+
+/// a derive attribute that adds nothing to its input.
+#[proc_macro_derive(SomeDerive)]
+pub fn some_derive(_item: TokenStream) -> TokenStream {
+    TokenStream::new()
+}
+

src/test/rustdoc/inline_cross/proc_macro.rs

@@ -0,0 +1,27 @@
+// 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.
+
+// ignore-stage1
+// aux-build:proc_macro.rs
+// build-aux-docs
+
+// FIXME: if/when proc-macros start exporting their doc attributes across crates, we can turn on
+// cross-crate inlining for them
+
+extern crate some_macros;
+
+// @has proc_macro/index.html
+// @has - '//a/@href' '../some_macros/macro.some_proc_macro.html'
+// @has - '//a/@href' '../some_macros/attr.some_proc_attr.html'
+// @has - '//a/@href' '../some_macros/derive.SomeDerive.html'
+// @!has proc_macro/macro.some_proc_macro.html
+// @!has proc_macro/attr.some_proc_attr.html
+// @!has proc_macro/derive.SomeDerive.html
+pub use some_macros::{some_proc_macro, some_proc_attr, SomeDerive};