https://git.ruby-lang.org/ruby.git/commit/?id=d32e2bb02d

From d32e2bb02d15008da008057fbd6b541662d52588 Mon Sep 17 00:00:00 2001
From: Nobuyoshi Nakada <nobu@r...>
Date: Sun, 24 May 2020 20:12:32 +0900
Subject: Allow references to $$ in Ripper DSL


diff --git a/ext/ripper/tools/dsl.rb b/ext/ripper/tools/dsl.rb
index d2b9715..49ff517 100644
--- a/ext/ripper/tools/dsl.rb
+++ b/ext/ripper/tools/dsl.rb
@@ -7,6 +7,9 @@ https://github.com/ruby/ruby/blob/trunk/ext/ripper/tools/dsl.rb#L7
 #   v2 = dispatch0(void_stmt);
 #   $$ = dispatch2(stmts_add, v1, v2);
 
+$dollar = "$$"
+alias $$ $dollar
+
 class DSL
   def initialize(code, options)
     @events = {}
-- 
cgit v0.10.2


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