diff --git a/src/hb-set-private.hh b/src/hb-set-private.hh index fee09cf41..e50d7bc4b 100644 --- a/src/hb-set-private.hh +++ b/src/hb-set-private.hh @@ -32,6 +32,14 @@ #include "hb-object-private.hh" +/* + * The set digests here implement various "filters" that support + * "approximate member query". Conceptually these are like Bloom + * Filter and Quotient Filter, however, much smaller, faster, and + * designed to fit the requirements of our uses for glyph coverage + * queries. As a result, our filters have much higher. + */ + struct hb_set_digest_common_bits_t { ASSERT_POD ();