Add a minimum required length to calc()

Author: tabatkins

css3-values/Overview.html

@@ -1375,6 +1375,13 @@ <h3 id=calc><span class=secno>8.1. </span> Mathematical Expressions:
    treated as if &lsquo;<code class=property>auto</code>&rsquo; had been
    specified.
 
+  <p>UAs must support &lsquo;<a href="#calc0"><code
+   class=css>calc()</code></a>&rsquo; expressions of at least 30 terms, where
+   each &lsquo;<a href="#number"><code class=css>number</code></a>&rsquo;,
+   &lsquo;<a href="#dimension"><code class=css>dimension</code></a>&rsquo;,
+   or &lsquo;<a href="#percentage"><code
+   class=css>percentage</code></a>&rsquo; is a term.
+
   <h3 id=cycle><span class=secno>8.2. </span> Cycling Values: &lsquo;<a
    href="#cycle-value"><code class=css>cycle()</code></a>&rsquo;</h3>
 

css3-values/Overview.src.html

@@ -959,6 +959,8 @@ <h3 id="calc">
 	and table cells in both auto and fixed layout tables MAY be treated as if
 	'auto' had been specified.</p>
 
+	<p>UAs must support ''calc()'' expressions of at least 30 terms, where each ''number'', ''dimension'', or ''percentage'' is a term.</p>
+
 <h3 id="cycle">
 Cycling Values: ''cycle()''</h3>