fix regexp operator

Author: thomas-kl1

examples/index.php

@@ -47,7 +47,10 @@ public function convert(...$expressions): string
 
 $expr1 = new Condition('value_1', 'eq', 'toto');
 $expr2 = new Condition('value_2', 'custom_op', 10);
-$logicTree = new Combine('and', false, [$expr1, $expr2]);
+$exprA = new Condition('value_1', 'regexp', '/^[A-Z]+/');
+$exprB = new Condition('value_2', 'custom_op', 10);
+$combA = new Combine('xor', true, [$exprA, $exprB]);
+$logicTree = new Combine('and', false, [$expr1, $expr2, $combA]);
 
 // Add new operator
 $logicTreeFacade->addOperator(OperatorType::Comparator, 'custom_op', new CustomOperator());

src/Operator/Comparator/RegexpOperator.php

@@ -18,6 +18,6 @@ final class RegexpOperator extends AbstractCompareTwo
 
     public function executeComparison(mixed $expr1, mixed $expr2): bool
     {
-        return (bool) preg_match($expr1, $expr2);
+        return (bool) preg_match($expr2, $expr1);
     }
 }