From 0a355636b256eec3c0416c5e18f6dd151010de13 Mon Sep 17 00:00:00 2001
From: Alexey Sokolov <alexey+znc@asokolov.org>
Date: Sat, 18 Nov 2023 15:07:46 +0000
Subject: [PATCH] Cleanup ZNC_LVREFQUAL

---
 include/znc/Message.h | 21 ++++-----------------
 1 file changed, 4 insertions(+), 17 deletions(-)

diff --git a/include/znc/Message.h b/include/znc/Message.h
index 0b6d374f..de54dc52 100644
--- a/include/znc/Message.h
+++ b/include/znc/Message.h
@@ -17,19 +17,6 @@
 #ifndef ZNC_MESSAGE_H
 #define ZNC_MESSAGE_H
 
-// Remove this after Feb 2016 when Debian 7 is EOL
-#if __cpp_ref_qualifiers >= 200710
-#define ZNC_LVREFQUAL &
-#elif defined(__clang__)
-#define ZNC_LVREFQUAL &
-#elif __GNUC__ > 4 ||                       \
-    __GNUC__ == 4 && (__GNUC_MINOR__ > 8 || \
-                      __GNUC_MINOR__ == 8 && __GNUC_PATCHLEVEL__ >= 1)
-#define ZNC_LVREFQUAL &
-#else
-#define ZNC_LVREFQUAL
-#endif
-
 #ifdef SWIG
 #define ZNC_MSG_DEPRECATED(msg)
 #else
@@ -166,7 +153,7 @@ class CMessage {
 // Implicit and explicit conversion to a subclass reference.
 #ifndef SWIG
     template <typename M>
-    M& As() ZNC_LVREFQUAL {
+    M& As() & {
         static_assert(std::is_base_of<CMessage, M>{},
                       "Must be subclass of CMessage");
         static_assert(sizeof(M) == sizeof(CMessage),
@@ -175,7 +162,7 @@ class CMessage {
     }
 
     template <typename M>
-    const M& As() const ZNC_LVREFQUAL {
+    const M& As() const& {
         static_assert(std::is_base_of<CMessage, M>{},
                       "Must be subclass of CMessage");
         static_assert(sizeof(M) == sizeof(CMessage),
@@ -185,12 +172,12 @@ class CMessage {
 
     template <typename M, typename = typename std::enable_if<
                               std::is_base_of<CMessage, M>{}>::type>
-    operator M&() ZNC_LVREFQUAL {
+    operator M&() & {
         return As<M>();
     }
     template <typename M, typename = typename std::enable_if<
                               std::is_base_of<CMessage, M>{}>::type>
-    operator const M&() const ZNC_LVREFQUAL {
+    operator const M&() const& {
         return As<M>();
     }
 // REGISTER_ZNC_MESSAGE allows SWIG to instantiate correct .As<> calls.