Test macro invocations containing $

Author: ninevra

corpus/macros.txt

@@ -28,6 +28,10 @@ a!(b + c + +);
 a!('a'..='z');
 a!('\u{0}'..='\u{2}');
 a!('lifetime)
+a!($)
+a!($())
+a!($ a $)
+a!(${$([ a ])});
 
 ----
 
@@ -52,7 +56,19 @@ a!('lifetime)
     (token_tree (char_literal) (char_literal)))
   (macro_invocation
     (identifier)
-    (token_tree (identifier))))
+    (token_tree (identifier)))
+  (macro_invocation
+    (identifier)
+    (token_tree))
+  (macro_invocation
+    (identifier)
+    (token_tree (token_tree)))
+  (macro_invocation
+    (identifier)
+    (token_tree (identifier)))
+  (macro_invocation
+    (identifier)
+    (token_tree (token_tree (token_tree (token_tree (identifier)))))))
 
 ============================================
 Macro definition