/**
* This method calculates the NPath Complexity of a while-statement, the
* meassured value is then returned as a string.
*
* <code>
* while (<expr>)
* <while-range>
* S;
*
* -- NP(while) = NP(<while-range>) + NP(<expr>) + 1 --
* </code>
*
* @param PHP_Depend_Code_ASTNodeI $node The currently visited node.
* @param string $data The previously calculated npath value.
*
* @return string
* @since 0.9.12
*/
public function visitWhileStatement($node, $data)
{
$expr = $this->sumComplexity($node->getChild(0));
$stmt = $node->getChild(1)->accept($this, 1);
$npath = PHP_Depend_Util_MathUtil::add($expr, $stmt);
$npath = PHP_Depend_Util_MathUtil::add($npath, '1');
return PHP_Depend_Util_MathUtil::mul($npath, $data);
}
