X-Git-Url: https://git.distorted.org.uk/~mdw/sod/blobdiff_plain/23e629348d11f7b60d3bf94dd8e77b142e03db1f..a47b5b286ee7c98c16b4023e5d6954cfdd9faa88:/lib/sod-structs.3

diff --git a/lib/sod-structs.3 b/lib/sod-structs.3
index febcdf5..7ac5ccc 100644
--- a/lib/sod-structs.3
+++ b/lib/sod-structs.3
@@ -626,6 +626,9 @@ for each of
 superclasses
 .IR A
 in the same chain in some (unimportant) order.
+The (somewhat obtuse) purpose of this union is to
+engage the `common initial sequence' rule of
+C99 (clause 6.5.2.3).
 .PP
 The
 .B ichain