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<documentation title="Require Explicit Boolean Operator Precedence"
 >
 <standard>
 <![CDATA[
 Forbids mixing different binary boolean operators (&&, ||, and, or, xor) within a single expression without making precedence clear using parentheses.
 ]]>
 </standard>
 <code_comparison>
 <code title="Valid: Making precedence clear with parentheses.">
 <![CDATA[
$one = false;
$two = false;
$three = true;

$result = ($one && $two) || $three;
$result2 = $one && ($two || $three);
$result3 = ($one && !$two) xor $three;
$result4 = $one && (!$two xor $three);

if (
 ($result && !$result3)
 || (!$result && $result3)
) {}
 ]]>
 </code>
 <code title="Invalid: Not using parentheses.">
 <![CDATA[
$one = false;
$two = false;
$three = true;

$result = $one && $two || $three;

$result3 = $one && !$two xor $three;

if (
 $result && !$result3
 || !$result && $result3
) {}
 ]]>
 </code>
 </code_comparison>
</documentation>

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