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<?php
namespace LegalThings\DataEnricher\Processor;
use LegalThings\DataEnricher\Node;
use LegalThings\DataEnricher\Processor;
use Hoa;
/**
* Description of Math
*
* @author arnold
*/
class Math implements Processor
{
use Processor\Implementation;
* @var Hoa\Compiler\Llk\Parser
protected $parser;
public function __construct($property)
$this->property = $property;
$this->parser = Hoa\Compiler\Llk\Llk::load(
new Hoa\File\Read('hoa://Library/Math/Arithmetic.pp')
);
}
* Apply processing to a single node
* @param Node $node
public function applyToNode(Node $node)
$expression = $node->getInstruction($this);
$variables = $node->getResult() ?: [];
$arithmetic = new Hoa\Math\Visitor\Arithmetic();
foreach ($variables as $name => $value) {
// Constants are upper case and variables lower case. We don't really care, so using a workaround.
if (preg_match('/^[A-Z_][A-Z0-9_]*$/', $name)) {
$arithmetic->addConstant($name, $value);
} else {
$arithmetic->addVariable($name, function() use ($value) { return $value; });
Let’s take a look at an example:
// Bad $a = 5; $b = 6; $c = 7; // Good $a = 5; $b = 6; $c = 7;
$ast = $this->parser->parse($expression);
$result = $arithmetic->visit($ast);
$node->setResult($result);
legalthings /
data-enricher
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