doc/structures.tex, lib/sod-structs.3: Justify union $C$__ichainu_$h$.

[sod] / lib / sod-structs.3

diff --git a/lib/sod-structs.3 b/lib/sod-structs.3
index febcdf5e620ee667c9efff69f9f87f2c41b9b0a2..7ac5cccd701560fed89392322506333d96488276 100644 (file)
--- 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