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ClosureFunction.php
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ClosureFunction.php
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<?php
/**
* JulLib ©2015 Julien <youlweb@hotmail.com>
*
* For the full copyright and license information, please view the LICENSE
* file that was distributed with this source code.
*/
namespace Jul\Lib\Math\Functions;
use Closure;
/**
* The function output is calculated with a closure provided at instantiation.
*
* @author Julien <youlweb@hotmail.com>
*/
class ClosureFunction implements FunctionInterface
{
/**
* @var callable
*/
private $_function;
/**
* @param callable $function The closure can receive more than one argument,
* but only the first one is mandatory. Provide default values to all others,
* or throw exceptions.
*/
public function __construct(Closure $function)
{
$this->_function = $function;
}
/**
* Calculate f(x).
*
* Optional arguments will be passed to the user-defined closure.
* @param mixed $x
* @param mixed $args,...
* @return mixed Result.
*/
public function f($x)
{
return call_user_func_array($this->_function, func_get_args());
}
}