Rollup merge of rust-lang#51389 - ollie27:rustdoc_cross_macro_src_stab, r=QuietMisdreavus

rustdoc: Fix missing stability and src links for inlined external macros

Fixes rust-lang#38951

r? @QuietMisdreavus

Author: kennytm

src/librustdoc/visit_ast.rs

@@ -244,10 +244,10 @@ impl<'a, 'tcx, 'rcx> RustdocVisitor<'a, 'tcx, 'rcx> {
                         def_id,
                         attrs: def.attrs.clone().into(),
                         name: def.ident.name,
-                        whence: def.span,
+                        whence: self.cx.tcx.def_span(def_id),
                         matchers,
-                        stab: self.stability(def.id),
-                        depr: self.deprecation(def.id),
+                        stab: self.cx.tcx.lookup_stability(def_id).cloned(),
+                        depr: self.cx.tcx.lookup_deprecation(def_id),
                         imported_from: Some(imported_from),
                     })
                 }

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

@@ -0,0 +1,21 @@
+// 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.
+
+#![feature(staged_api)]
+
+#![stable(feature = "rust1", since = "1.0.0")]
+
+/// docs for my_macro
+#[unstable(feature = "macro_test", issue = "0")]
+#[rustc_deprecated(since = "1.2.3", reason = "text")]
+#[macro_export]
+macro_rules! my_macro {
+    () => ()
+}

src/test/rustdoc/inline_cross/macros.rs

@@ -0,0 +1,28 @@
+// 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.
+
+// aux-build:macros.rs
+// build-aux-docs
+
+#![feature(macro_test)]
+#![feature(use_extern_macros)]
+
+#![crate_name = "foo"]
+
+extern crate macros;
+
+// @has foo/index.html '//*[@class="docblock-short"]' '[Deprecated] [Experimental]'
+
+// @has foo/macro.my_macro.html
+// @has - '//*[@class="docblock"]' 'docs for my_macro'
+// @has - '//*[@class="stab deprecated"]' 'Deprecated since 1.2.3: text'
+// @has - '//*[@class="stab unstable"]' 'macro_test'
+// @has - '//a/@href' '../src/macros/macros.rs.html#19-21'
+pub use macros::my_macro;