From 9e975a46a2edc90299d901c2983d18de6982fa14 Mon Sep 17 00:00:00 2001
From: Thomas Harte <thomas.harte@gmail.com>
Date: Fri, 21 Jul 2017 18:18:45 -0400
Subject: [PATCH] Mildly simplified syntax.

---
 NumberTheory/Factors.hpp | 6 +++---
 1 file changed, 3 insertions(+), 3 deletions(-)

diff --git a/NumberTheory/Factors.hpp b/NumberTheory/Factors.hpp
index 03ffc8593..98832d247 100644
--- a/NumberTheory/Factors.hpp
+++ b/NumberTheory/Factors.hpp
@@ -9,15 +9,15 @@
 #ifndef Factors_hpp
 #define Factors_hpp
 
+#include <utility>
+
 namespace NumberTheory {
 	/*!
 		@returns The greatest common divisor of @c a and @c b as computed by Euclid's algorithm.
 	*/
 	template<class T> T greatest_common_divisor(T a, T b) {
 		if(a < b) {
-			T swap = b;
-			b = a;
-			a = swap;
+			std::swap(a, b);
 		}
 
 		while(1) {