Generate shortcut links

Author: Manishearth

src/librustdoc/html/markdown.rs

@@ -591,7 +591,15 @@ impl<'a> fmt::Display for Markdown<'a> {
         opts.insert(OPTION_ENABLE_TABLES);
         opts.insert(OPTION_ENABLE_FOOTNOTES);
 
-        let p = Parser::new_ext(md, opts);
+        let replacer = |_: &str, s: &str| {
+            if let Some(&(_, ref replace)) = links.into_iter().find(|link| &*link.0 == s) {
+                Some((replace.clone(), s.to_owned()))
+            } else {
+                None
+            }
+        };
+
+        let p = Parser::new_with_broken_link_callback(md, opts, Some(&replacer));
 
         let mut s = String::with_capacity(md.len() * 3 / 2);
 
@@ -662,7 +670,16 @@ impl<'a> fmt::Display for MarkdownSummaryLine<'a> {
         // This is actually common enough to special-case
         if md.is_empty() { return Ok(()) }
 
-        let p = Parser::new(md);
+        let replacer = |_: &str, s: &str| {
+            if let Some(&(_, ref replace)) = links.into_iter().find(|link| &*link.0 == s) {
+                Some((replace.clone(), s.to_owned()))
+            } else {
+                None
+            }
+        };
+
+        let p = Parser::new_with_broken_link_callback(md, Options::empty(),
+                                                      Some(&replacer));
 
         let mut s = String::new();