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-rw-r--r--src/dispextern.h6
1 files changed, 5 insertions, 1 deletions
diff --git a/src/dispextern.h b/src/dispextern.h
index 57fa09d3bf..c0a67690a5 100644
--- a/src/dispextern.h
+++ b/src/dispextern.h
@@ -1773,7 +1773,11 @@ extern int face_change_count;
/* Data type for describing the bidirectional character types. The
first 7 must be at the beginning, because they are the only values
valid in the `bidi_type' member of `struct glyph'; we only reserve
- 3 bits for it, so we cannot use there values larger than 7. */
+ 3 bits for it, so we cannot use there values larger than 7.
+
+ The order of members must be in sync with the 8th element of the
+ member of unidata-prop-alist (in admin/unidata/unidata-getn.el) for
+ Unicode character property `bidi-class'. */
typedef enum {
UNKNOWN_BT = 0,
STRONG_L, /* strong left-to-right */