Redirect

src/librustdoc/html/render.rs

@@ -1426,6 +1426,16 @@ impl Context {
                                                                 .open(&redir_dst) {
                     try_err!(layout::redirect(&mut redirect_out, file_name), &redir_dst);
                 }
+
+                // If the item is a macro, redirect from the old macro URL (with !)
+                // to the new one (without).
+                // FIXME(#35705) remove this redirect.
+                if item_type == ItemType::Macro {
+                    let redir_name = format!("{}.{}!.html", item_type, name);
+                    let redir_dst = self.dst.join(redir_name);
+                    let mut redirect_out = try_err!(File::create(&redir_dst), &redir_dst);
+                    try_err!(layout::redirect(&mut redirect_out, file_name), &redir_dst);
+                }
             }
         }
         Ok(())

src/test/rustdoc/macros.rs

@@ -12,6 +12,8 @@
 // @has - //pre '() => { ... };'
 // @has - //pre '($a:tt) => { ... };'
 // @has - //pre '($e:expr) => { ... };'
+// @has macros/macro.my_macro!.html
+// @has - //a 'macro.my_macro.html'
 #[macro_export]
 macro_rules! my_macro {
     () => [];