Dedent rust await function with ?

rc/filetype/rust.kak

@@ -157,8 +157,8 @@ define-command -hidden rust-indent-on-new-line %~
             try %< execute-keys -draft k <a-x> s [^\h].+ <ret> <a-K> \A[-+*/&|^})<gt><lt>#] <ret> <a-K> [,<semicolon>{](\h*/[/*].*|)$ <ret> j <a-gt> >
             # indent after lines ending with {
             try %< execute-keys -draft k <a-x> <a-k> \{$ <ret> j <a-gt> >
-            # dedent after lines starting with . and ending with } or ) or , or ; or .await
-            try %_ execute-keys -draft k <a-x> <a-k> ^\h*\. <ret> <a-k>([}),<semicolon>]|\.await)\h*$ <ret> j <a-lt> _
+            # dedent after lines starting with . and ending with } or ) or , or ; or .await (} or ) or .await maybe with ?)
+            try %_ execute-keys -draft k <a-x> <a-k> ^\h*\. <ret> <a-k> ([,<semicolon>]|(([})]|\.await)\?*))\h*$ <ret> j <a-lt> _
             # dedent after lines ending with " => {}" - part of empty match
             try %# execute-keys -draft k <a-x> <a-k> \ =>\ \{\}\h*$ <ret> j <a-lt> #
             # align to opening curly brace or paren when newline is inserted before a single closing

test/indent/rust/dedent-async/in

@@ -3,3 +3,6 @@
 
     foo().await%( )
 
+    foo()
+        .await?%( )
+

test/indent/rust/dedent-async/out

@@ -5,3 +5,7 @@
     foo().await
         bar
 
+    foo()
+        .await?
+        bar
+

test/indent/rust/dedent-function-closing-brace/in

@@ -11,5 +11,9 @@ fn foo() -> i32 {%( )bar()
 fn foo() -> i32 {
     bar()%( )}
 
-  fn foo() -> i32 {
-           bar()%( )}
+    fn foo() -> i32 {
+        bar()%( )}
+
+    fn foo() -> i32 {
+        bar()?%( )}
+

test/indent/rust/dedent-function-closing-brace/out

@@ -16,6 +16,11 @@ fn foo() -> i32 {
     bar()
 }
 
-  fn foo() -> i32 {
-           bar()
-  }
+    fn foo() -> i32 {
+        bar()
+    }
+
+    fn foo() -> i32 {
+        bar()?
+    }
+

test/indent/rust/dedent-generic-closing-brace/in

@@ -27,5 +27,8 @@
 {(
     bar()%( ))}
 
+{(
+    bar()?%( ))}
+
    {(
                         bar()%( ))}

test/indent/rust/dedent-generic-closing-brace/out

@@ -38,6 +38,10 @@
     bar()
 )}
 
+{(
+    bar()?
+)}
+
    {(
                         bar()
    )}