doc/concepts.tex: Warn about allocating resources in init methods.

[sod] / doc / structures.tex

diff --git a/doc/structures.tex b/doc/structures.tex
index dfa5c4c..c5c2219 100644 (file)
--- a/doc/structures.tex
+++ b/doc/structures.tex
@@ -201,7 +201,7 @@ recommended.
 
 \begin{describe}[SodClass]{cls}
     {[nick = cls, link = SodObject]                             \\
-     class SodClass : SodObject \{                              \\ \ind
+     class SodClass: SodObject \{                               \\ \ind
        const char *name;                                        \\
        const char *nick;                                        \\
        size_t initsz;                                           \\
@@ -409,12 +409,11 @@ and this is followed by corresponding members
   struct $A$__ichain_$h$ $a$;
 \end{prog}
 for each of $C$'s superclasses $A$ in the same chain in some (unimportant)
-order.
+order.  The (somewhat obtuse) purpose of this union is to engage the `common
+initial sequence' rule of \cite[6.5.2.3]{FIXME:C99}.
 
 \subsubsection{The ichain structure}
-The
-@|ichain|
-structure contains (in order), a pointer
+The @|ichain| structure contains (in order), a pointer
 \begin{prog}
   const struct $C$__vt_$h$ *_vt;
 \end{prog}
@@ -478,6 +477,8 @@ structure.
   extern const union $C$__vtu_$h$ $C$__vtable_$h$;
 \end{prog}
 
+In the following, let $M$ be the metaclass of $C$.
+
 \subsubsection{The vtu union}
 The outer layer is a @|union $C$__vtu_$h$| containing a member
 \begin{prog}