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+<a name="Empty-Statements-1"></a>
+<h4 class="subsection">11.7.4 Empty Statements</h4>
+<a name="index-Empty-Statements"></a>
+
+<p>Whenever possible, statements with no effect are discarded. But
+if they are nested within another construct which cannot be
+discarded for some reason, they are instead replaced with an
+empty statement, generated by <code>build_empty_stmt</code>.
+Initially, all empty statements were shared, after the pattern of
+the Java front end, but this caused a lot of trouble in practice.
+</p>
+<p>An empty statement is represented as <code>(void)0</code>.
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