Slightly modify example on prevention of external function evaluation

chapters/classes.tex

@@ -418,13 +418,17 @@ \subsection{Component Variability Prefixes discrete, parameter, constant}\label{
 parameter Integer n = length("Hello");             /* Structural parameter */
 parameter Integer p = length("Hello")
   annotation(Evaluate = false);                    /* Normal parameter */
-parameter Boolean b = false;
+parameter Boolean b = false;                       /* Structural parameter */
 
-/* Fulfillment of acyclic binding rule might cause evaluation of n: */
-parameter Real x = if b and n > 3 then 1 - x else 0;
+/* Fulfillment of acyclic binding rule might cause evaluation of n;
+ * to break the cycle, a tool might evaluate either b, n, or both:
+ */
+parameter Real x = if b and n < 3 then 1 - x else 0;
 
-/* Fulfillment of acyclic binding rule cannot cause evaluation of p: */
-parameter Real y = if b and p > 3 then 1 - y else 0;
+/* Fulfillment of acyclic binding rule cannot cause evaluation of p;
+ * to break the cycle, evaluation of b is the only option:
+ */
+parameter Real y = if b and p < 3 then 1 - y else 0;
 \end{lstlisting}
 \end{example}