From d397ae4c060b03b6ceb8e281c8f5f42e79ca0da5 Mon Sep 17 00:00:00 2001
From: Marc Mutz <marc.mutz@qt.io>
Date: Wed, 29 May 2024 08:40:49 +0200
Subject: [PATCH] totally_ordered_wrapper: make default-constructible

Pointers are.

The default-constructor is = default'ed, meaning it has the same
semantics as the raw pointer it replaces:

   totally_ordered_wrapper<int*> p; // partially-formed (uninit'ed)
   totally_ordered_wrapper<int*> p{}; // well-formed (nullptr)

   totally_ordered_wrapper<int*> a[1024]; // doesn't write 8KiB of NULs

Change-Id: I0d2e906bc5ec45d95b03a3af451167fec84439fd
Reviewed-by: Rym Bouabid <rym.bouabid@qt.io>
Reviewed-by: Ivan Solovev <ivan.solovev@qt.io>
---
 src/corelib/global/qcomparehelpers.h | 1 +
 1 file changed, 1 insertion(+)

diff --git a/src/corelib/global/qcomparehelpers.h b/src/corelib/global/qcomparehelpers.h
index 508da3fcd37..b067cb2c7ea 100644
--- a/src/corelib/global/qcomparehelpers.h
+++ b/src/corelib/global/qcomparehelpers.h
@@ -619,6 +619,7 @@ class totally_ordered_wrapper
 
     P ptr;
 public:
+    totally_ordered_wrapper() noexcept = default;
     explicit constexpr totally_ordered_wrapper(P p) noexcept : ptr(p) {}
 
     constexpr P get() const noexcept { return ptr; }