Add "self" intra-link support

src/test/rustdoc/intra-link-self.rs

@@ -0,0 +1,39 @@
+// 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.
+
+#![crate_name = "foo"]
+
+// @has foo/index.html '//a/@href' '../foo/struct.Foo.html#method.new'
+// @has foo/struct.Foo.html '//a/@href' '../foo/struct.Foo.html#method.new'
+
+/// Use [`new`] to create a new instance.
+///
+/// [`new`]: Self::new
+pub struct Foo;
+
+impl Foo {
+    pub fn new() -> Self {
+        unimplemented!()
+    }
+}
+
+// @has foo/index.html '//a/@href' '../foo/struct.Bar.html#method.new2'
+// @has foo/struct.Bar.html '//a/@href' '../foo/struct.Bar.html#method.new2'
+
+/// Use [`new2`] to create a new instance.
+///
+/// [`new2`]: Self::new2
+pub struct Bar;
+
+impl Bar {
+    pub fn new2() -> Self {
+        unimplemented!()
+    }
+}