From 18b587dc93fa427389ec2ec5df06cafab7c99c1a Mon Sep 17 00:00:00 2001
From: "J. Nick Koston" <nick@home-assistant.io>
Date: Mon, 23 Feb 2026 18:34:27 -0600
Subject: [PATCH] [cse7766] Use C++17 nested namespace syntax

---
 esphome/components/cse7766/cse7766.cpp | 6 ++----
 esphome/components/cse7766/cse7766.h   | 6 ++----
 2 files changed, 4 insertions(+), 8 deletions(-)

diff --git a/esphome/components/cse7766/cse7766.cpp b/esphome/components/cse7766/cse7766.cpp
index 7ffdf757a0..806b79e19e 100644
--- a/esphome/components/cse7766/cse7766.cpp
+++ b/esphome/components/cse7766/cse7766.cpp
@@ -3,8 +3,7 @@
 #include "esphome/core/helpers.h"
 #include "esphome/core/log.h"
 
-namespace esphome {
-namespace cse7766 {
+namespace esphome::cse7766 {
 
 static const char *const TAG = "cse7766";
 
@@ -258,5 +257,4 @@ void CSE7766Component::dump_config() {
   this->check_uart_settings(4800, 1, uart::UART_CONFIG_PARITY_EVEN);
 }
 
-}  // namespace cse7766
-}  // namespace esphome
+}  // namespace esphome::cse7766
diff --git a/esphome/components/cse7766/cse7766.h b/esphome/components/cse7766/cse7766.h
index 66a4e04633..77b80dd824 100644
--- a/esphome/components/cse7766/cse7766.h
+++ b/esphome/components/cse7766/cse7766.h
@@ -5,8 +5,7 @@
 #include "esphome/components/sensor/sensor.h"
 #include "esphome/components/uart/uart.h"
 
-namespace esphome {
-namespace cse7766 {
+namespace esphome::cse7766 {
 
 static constexpr size_t CSE7766_RAW_DATA_SIZE = 24;
 
@@ -49,5 +48,4 @@ class CSE7766Component : public Component, public uart::UARTDevice {
   uint16_t cf_pulses_last_{0};
 };
 
-}  // namespace cse7766
-}  // namespace esphome
+}  // namespace esphome::cse7766