ripper: Allow parenthesized comma in options

1 files changed, 6 insertions, 1 deletions

diff --git a/ext/ripper/tools/dsl.rb b/ext/ripper/tools/dsl.rb
index 4815364c92..b55952cbee 100644
--- a/ext/ripper/tools/dsl.rb
+++ b/ext/ripper/tools/dsl.rb
@@ -22,10 +22,15 @@ class DSL
 
   def self.line?(line, lineno = nil, indent: nil)
     if %r<(?<space>\s*)/\*% *ripper(?:\[(?<option>.*?)\])?: *(?<code>.*?) *%\*/> =~ line
-      new(code, option&.split(",") || [], lineno, indent: indent || space)
+      new(code, comma_split(option), lineno, indent: indent || space)
     end
   end
 
+  def self.comma_split(str)
+    str or return []
+    str.scan(/(([^(,)]+|\((?:,|\g<0>)*\))+)/).map(&:first)
+  end
+
   using Module.new {
     refine Array do
       def to_s