1 files changed, 32 insertions, 0 deletions
diff --git a/ext/ripper/tools/list-scan-event-ids.rb b/ext/ripper/tools/list-scan-event-ids.rb
new file mode 100755
index 0000000000..6f25362b5d
--- /dev/null
+++ b/ext/ripper/tools/list-scan-event-ids.rb
@@ -0,0 +1,32 @@
+#
+# list-scan-event-ids.rb
+#
+
+require 'getopts'
+
+def usage(status)
+  (status == 0 ? $stdout : $stderr).puts(<<EOS)
+Usage: #{File.basename($0)} eventids2.c
+    -a    print IDs with arity.
+EOS
+  exit status
+end
+
+def main
+  ok = getopts('a', 'help')
+  usage 0 if $OPT_help
+  usage 1 unless ok
+  extract_ids(ARGF).sort.each do |id|
+    if $OPT_a
+      puts "#{id} 1"
+    else
+      puts id
+    end
+  end
+end
+
+def extract_ids(f)
+  (f.read.scan(/ripper_id_(\w+)/).flatten - ['scan']).uniq
+end
+
+main