From 66e471cf2ac3dcecf060695f77b28ba78163d066 Mon Sep 17 00:00:00 2001
From: "J. Nick Koston" <nick@home-assistant.io>
Date: Tue, 18 Nov 2025 14:33:07 -0600
Subject: [PATCH] [mdns] Modernize to C++17 nested namespace syntax

---
 esphome/components/mdns/mdns_component.cpp | 6 ++----
 esphome/components/mdns/mdns_component.h   | 6 ++----
 esphome/components/mdns/mdns_esp32.cpp     | 6 ++----
 esphome/components/mdns/mdns_esp8266.cpp   | 6 ++----
 esphome/components/mdns/mdns_host.cpp      | 6 ++----
 esphome/components/mdns/mdns_libretiny.cpp | 6 ++----
 esphome/components/mdns/mdns_rp2040.cpp    | 6 ++----
 7 files changed, 14 insertions(+), 28 deletions(-)

diff --git a/esphome/components/mdns/mdns_component.cpp b/esphome/components/mdns/mdns_component.cpp
index b66129404e..c81defd19f 100644
--- a/esphome/components/mdns/mdns_component.cpp
+++ b/esphome/components/mdns/mdns_component.cpp
@@ -21,8 +21,7 @@
 #include "esphome/components/dashboard_import/dashboard_import.h"
 #endif
 
-namespace esphome {
-namespace mdns {
+namespace esphome::mdns {
 
 static const char *const TAG = "mdns";
 
@@ -189,6 +188,5 @@ void MDNSComponent::dump_config() {
 #endif
 }
 
-}  // namespace mdns
-}  // namespace esphome
+}  // namespace esphome::mdns
 #endif
diff --git a/esphome/components/mdns/mdns_component.h b/esphome/components/mdns/mdns_component.h
index f4237d5a69..691c45b7df 100644
--- a/esphome/components/mdns/mdns_component.h
+++ b/esphome/components/mdns/mdns_component.h
@@ -6,8 +6,7 @@
 #include "esphome/core/component.h"
 #include "esphome/core/helpers.h"
 
-namespace esphome {
-namespace mdns {
+namespace esphome::mdns {
 
 // Helper struct that identifies strings that may be stored in flash storage (similar to LogString)
 struct MDNSString;
@@ -79,6 +78,5 @@ class MDNSComponent : public Component {
   void compile_records_(StaticVector<MDNSService, MDNS_SERVICE_COUNT> &services);
 };
 
-}  // namespace mdns
-}  // namespace esphome
+}  // namespace esphome::mdns
 #endif
diff --git a/esphome/components/mdns/mdns_esp32.cpp b/esphome/components/mdns/mdns_esp32.cpp
index ecdc926cc9..5547a2524b 100644
--- a/esphome/components/mdns/mdns_esp32.cpp
+++ b/esphome/components/mdns/mdns_esp32.cpp
@@ -7,8 +7,7 @@
 #include "esphome/core/log.h"
 #include "mdns_component.h"
 
-namespace esphome {
-namespace mdns {
+namespace esphome::mdns {
 
 static const char *const TAG = "mdns";
 
@@ -56,7 +55,6 @@ void MDNSComponent::on_shutdown() {
   delay(40);  // Allow the mdns packets announcing service removal to be sent
 }
 
-}  // namespace mdns
-}  // namespace esphome
+}  // namespace esphome::mdns
 
 #endif  // USE_ESP32
diff --git a/esphome/components/mdns/mdns_esp8266.cpp b/esphome/components/mdns/mdns_esp8266.cpp
index 9bbb406070..06f905884c 100644
--- a/esphome/components/mdns/mdns_esp8266.cpp
+++ b/esphome/components/mdns/mdns_esp8266.cpp
@@ -9,8 +9,7 @@
 #include "esphome/core/log.h"
 #include "mdns_component.h"
 
-namespace esphome {
-namespace mdns {
+namespace esphome::mdns {
 
 void MDNSComponent::setup() {
 #ifdef USE_MDNS_STORE_SERVICES
@@ -52,7 +51,6 @@ void MDNSComponent::on_shutdown() {
   delay(10);
 }
 
-}  // namespace mdns
-}  // namespace esphome
+}  // namespace esphome::mdns
 
 #endif
diff --git a/esphome/components/mdns/mdns_host.cpp b/esphome/components/mdns/mdns_host.cpp
index f645d8d068..64b8c8f54b 100644
--- a/esphome/components/mdns/mdns_host.cpp
+++ b/esphome/components/mdns/mdns_host.cpp
@@ -6,8 +6,7 @@
 #include "esphome/core/log.h"
 #include "mdns_component.h"
 
-namespace esphome {
-namespace mdns {
+namespace esphome::mdns {
 
 void MDNSComponent::setup() {
   // Host platform doesn't have actual mDNS implementation
@@ -15,7 +14,6 @@ void MDNSComponent::setup() {
 
 void MDNSComponent::on_shutdown() {}
 
-}  // namespace mdns
-}  // namespace esphome
+}  // namespace esphome::mdns
 
 #endif
diff --git a/esphome/components/mdns/mdns_libretiny.cpp b/esphome/components/mdns/mdns_libretiny.cpp
index fb2088f719..a049fe2109 100644
--- a/esphome/components/mdns/mdns_libretiny.cpp
+++ b/esphome/components/mdns/mdns_libretiny.cpp
@@ -9,8 +9,7 @@
 
 #include <mDNS.h>
 
-namespace esphome {
-namespace mdns {
+namespace esphome::mdns {
 
 void MDNSComponent::setup() {
 #ifdef USE_MDNS_STORE_SERVICES
@@ -46,7 +45,6 @@ void MDNSComponent::setup() {
 
 void MDNSComponent::on_shutdown() {}
 
-}  // namespace mdns
-}  // namespace esphome
+}  // namespace esphome::mdns
 
 #endif
diff --git a/esphome/components/mdns/mdns_rp2040.cpp b/esphome/components/mdns/mdns_rp2040.cpp
index a9f5349f14..a102e0b6c3 100644
--- a/esphome/components/mdns/mdns_rp2040.cpp
+++ b/esphome/components/mdns/mdns_rp2040.cpp
@@ -9,8 +9,7 @@
 
 #include <ESP8266mDNS.h>
 
-namespace esphome {
-namespace mdns {
+namespace esphome::mdns {
 
 void MDNSComponent::setup() {
 #ifdef USE_MDNS_STORE_SERVICES
@@ -51,7 +50,6 @@ void MDNSComponent::on_shutdown() {
   delay(40);
 }
 
-}  // namespace mdns
-}  // namespace esphome
+}  // namespace esphome::mdns
 
 #endif