support C++20 with older boost

daemon/HTTPServer.cpp

@@ -13,6 +13,7 @@
 #include <memory>
 #include <regex>
 
+#include <utility> // for C++20 with boost < 1.81
 #include <boost/asio.hpp>
 #include <boost/algorithm/string.hpp>
 

libi2pd/Destination.h

@@ -20,6 +20,7 @@
 #include <string>
 #include <functional>
 #include <future>
+#include <utility> // for C++20 with boost < 1.81
 #include <boost/asio.hpp>
 #include "Identity.h"
 #include "TunnelPool.h"

libi2pd/NetDb.cpp

@@ -10,6 +10,7 @@
 #include <fstream>
 #include <vector>
 #include <map>
+#include <utility> // for C++20 with boost < 1.81
 #include <boost/asio.hpp>
 #include <stdexcept>
 

libi2pd/Reseed.cpp

@@ -10,6 +10,7 @@
 #include <random>
 #include <fstream>
 #include <sstream>
+#include <utility> // for C++20 with boost < 1.81
 #include <boost/asio.hpp>
 #include <boost/asio/ssl.hpp>
 #include <boost/algorithm/string.hpp>

libi2pd/RouterContext.h

@@ -13,6 +13,7 @@
 #include <string>
 #include <memory>
 #include <unordered_set>
+#include <utility> // for C++20 with boost < 1.81
 #include <boost/asio.hpp>
 #include "Identity.h"
 #include "RouterInfo.h"

libi2pd/RouterInfo.h

@@ -18,6 +18,7 @@
 #include <array>
 #include <iostream>
 #include <memory>
+#include <utility> // for C++20 with boost < 1.81
 #include <boost/asio.hpp>
 #ifndef __cpp_lib_atomic_shared_ptr
 #include <boost/shared_ptr.hpp>

libi2pd/Timestamp.cpp

@@ -1,5 +1,5 @@
 /*
-* Copyright (c) 2013-2024, The PurpleI2P Project
+* Copyright (c) 2013-2026, The PurpleI2P Project
 *
 * This file is part of Purple i2pd project and licensed under BSD3
 *
@@ -12,6 +12,7 @@
 #include <string.h>
 #include <chrono>
 #include <future>
+#include <utility> // for C++20 with boost < 1.81
 #include <boost/asio.hpp>
 #include <boost/algorithm/string.hpp>
 #include "Config.h"
@@ -245,8 +246,8 @@ namespace util
 	{
 		return std::chrono::duration_cast<std::chrono::seconds>(
 			std::chrono::steady_clock::now().time_since_epoch()).count();
-	}	
-	
+	}
+
 	void GetCurrentDate (char * date)
 	{
 		GetDateString (GetSecondsSinceEpoch (), date);
@@ -255,8 +256,8 @@ namespace util
 	void GetNextDayDate (char * date)
 	{
 		GetDateString (GetSecondsSinceEpoch () + 24*60*60, date);
-	}	
-	
+	}
+
 	void GetDateString (uint64_t timestamp, char * date)
 	{
 		using clock = std::chrono::system_clock;

libi2pd/Timestamp.h

@@ -1,5 +1,5 @@
 /*
-* Copyright (c) 2013-2025, The PurpleI2P Project
+* Copyright (c) 2013-2026, The PurpleI2P Project
 *
 * This file is part of Purple i2pd project and licensed under BSD3
 *
@@ -13,8 +13,9 @@
 #include <thread>
 #include <vector>
 #include <string>
+#include <utility> // for C++20 with boost < 1.81
 #include <boost/asio.hpp>
-#include <boost/asio/steady_timer.hpp> // for boost 1.89 
+#include <boost/asio/steady_timer.hpp> // for boost 1.89
 
 namespace i2p
 {
@@ -28,7 +29,7 @@ namespace util
 	uint64_t GetMonotonicMicroseconds ();
 	uint64_t GetMonotonicMilliseconds ();
 	uint64_t GetMonotonicSeconds ();
-	
+
 	void GetCurrentDate (char * date); // returns UTC date as YYYYMMDD string, 9 bytes
 	void GetNextDayDate (char * date); // returns next UTC day as YYYYMMDD string, 9 bytes
 	void GetDateString (uint64_t timestamp, char * date); // timestamp is seconds since epoch, returns date as YYYYMMDD string, 9 bytes

libi2pd/Transports.h

@@ -22,6 +22,7 @@
 #include <memory>
 #include <atomic>
 #include <random>
+#include <utility> // for C++20 with boost < 1.81
 #include <boost/asio.hpp>
 #include "TransportSession.h"
 #include "SSU2.h"

libi2pd/util.cpp

@@ -10,6 +10,7 @@
 #include <string>
 #include <array>
 #include <unordered_set>
+#include <utility> // for C++20 with boost < 1.81
 #include <boost/asio.hpp>
 
 #include "util.h"

libi2pd_client/HTTPProxy.cpp

@@ -14,6 +14,7 @@
 #include <atomic>
 #include <memory>
 #include <set>
+#include <utility> // for C++20 with boost < 1.81
 #include <boost/asio.hpp>
 #include <boost/algorithm/string.hpp>
 #include <boost/algorithm/string/predicate.hpp>

libi2pd_client/SOCKS.h

@@ -14,6 +14,7 @@
 #include <map>
 #include <string>
 #include <string_view>
+#include <utility> // for C++20 with boost < 1.81
 #include <boost/asio.hpp>
 #include <mutex>
 #include "I2PService.h"