From a6f1807d98bec8611cd9052cf227a0c26fa580b8 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?J=C5=8Dshin?= <git@wholezero.org>
Date: Sun, 9 Jun 2024 19:59:31 -0700
Subject: [PATCH] Decouple swap from std

This allows you to implement your own swap function without it having to
be part of the std namespace. std::swap is still used if it's available.
---
 ctl/optional.h | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/ctl/optional.h b/ctl/optional.h
index 110bd5eec..26fa97bad 100644
--- a/ctl/optional.h
+++ b/ctl/optional.h
@@ -118,8 +118,9 @@ class optional
 
     void swap(optional& other) noexcept
     {
+        using std::swap;
         if (present_ && other.present_) {
-            std::swap(value_, other.value_);
+            swap(value_, other.value_);
         } else if (present_) {
             other.emplace(std::move(value_));
             reset();