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-rw-r--r--include/ruby/ruby.h1
1 files changed, 1 insertions, 0 deletions
diff --git a/include/ruby/ruby.h b/include/ruby/ruby.h
index c3696ff866..5707571cfa 100644
--- a/include/ruby/ruby.h
+++ b/include/ruby/ruby.h
@@ -632,6 +632,7 @@ struct RBignum {
(long)((RBASIC(b)->flags >> RBIGNUM_EMBED_LEN_SHIFT) & \
(RBIGNUM_EMBED_LEN_MASK >> RBIGNUM_EMBED_LEN_SHIFT)) : \
RBIGNUM(b)->as.heap.len)
+/* LSB:RBIGNUM_DIGITS(b)[0], MSB:RBIGNUM_DIGITS(b)[RBIGNUM_LEN(b)-1] */
#define RBIGNUM_DIGITS(b) \
((RBASIC(b)->flags & RBIGNUM_EMBED_FLAG) ? \
RBIGNUM(b)->as.ary : \