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-rw-r--r--internal/parse.h7
1 files changed, 7 insertions, 0 deletions
diff --git a/internal/parse.h b/internal/parse.h
index 4a9c4acf8a..fdf2a10183 100644
--- a/internal/parse.h
+++ b/internal/parse.h
@@ -12,6 +12,13 @@
#include "rubyparser.h"
#include "internal/static_assert.h"
+// The default parser to use for Ruby code.
+// 0: parse.y
+// 1: Prism
+#ifndef RB_DEFAULT_PARSER
+#define RB_DEFAULT_PARSER 0
+#endif
+
#ifdef UNIVERSAL_PARSER
#define rb_encoding const void
#endif