From bb64b59e11b73daa4e21148a62fa6ff3fe75d159 Mon Sep 17 00:00:00 2001
From: Andreu Correa <andreu@adsmurai.com>
Date: Sun, 30 Apr 2017 21:01:13 +0200
Subject: [PATCH] Use guard clause in Decimal::pow

---
 src/Decimal.php | 20 ++++++++------------
 1 file changed, 8 insertions(+), 12 deletions(-)

diff --git a/src/Decimal.php b/src/Decimal.php
index 6b4aa7b..55fc7f1 100644
--- a/src/Decimal.php
+++ b/src/Decimal.php
@@ -340,20 +340,16 @@ public function pow(Decimal $b, int $scale = null): Decimal
                     $pow_scale
                 );
             } else { // elseif ($this->isNegative())
-                if ($b->isInteger()) {
-                    if (\preg_match('/^[+\-]?[0-9]*[02468](\.0+)?$/', $b->value, $captures) === 1) {
-                        // $b is an even number
-                        return $this->additiveInverse()->pow($b, $scale);
-                    } else {
-                        // $b is an odd number
-                        return $this->additiveInverse()->pow($b, $scale)->additiveInverse();
-                    }
+                if (!$b->isInteger()) {
+                    throw new NotImplementedError(
+                        "Usually negative numbers can't be powered to non integer numbers. " .
+                        "The cases where is possible are not implemented."
+                    );
                 }
 
-                throw new NotImplementedError(
-                    "Usually negative numbers can't be powered to non integer numbers. " .
-                    "The cases where is possible are not implemented."
-                );
+                return (\preg_match('/^[+\-]?[0-9]*[02468](\.0+)?$/', $b->value, $captures) === 1)
+                    ? $this->additiveInverse()->pow($b, $scale)                      // $b is an even number
+                    : $this->additiveInverse()->pow($b, $scale)->additiveInverse();  // $b is an odd number
             }
         }
     }