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-rw-r--r--system/doc/reference_manual/expressions.xml8
1 files changed, 5 insertions, 3 deletions
diff --git a/system/doc/reference_manual/expressions.xml b/system/doc/reference_manual/expressions.xml
index e98fcbcbb9..75486488e9 100644
--- a/system/doc/reference_manual/expressions.xml
+++ b/system/doc/reference_manual/expressions.xml
@@ -1556,9 +1556,11 @@ end</pre>
<p>Bit string comprehensions are written with
the following syntax:</p>
<pre>
-&lt;&lt; BitString || Qualifier1,...,QualifierN &gt;&gt;</pre>
- <p>Here, <c>BitString</c> is a bit string expression and each
- <c>Qualifier</c> is either a generator, a bit string generator or a filter.</p>
+&lt;&lt; BitStringExpr || Qualifier1,...,QualifierN &gt;&gt;</pre>
+ <p><c>BitStringExpr</c> is an expression that evalutes to a bit
+ string. If <c>BitStringExpr</c> is a function call, it must be
+ enclosed in parentheses. Each <c>Qualifier</c> is either a
+ generator, a bit string generator or a filter.</p>
<list type="bulleted">
<item>A <em>generator</em> is written as: <br></br>
&nbsp;&nbsp;<c><![CDATA[Pattern <- ListExpr]]></c>. <br></br>