note: use reference type to prevent copying

[pavel-pimenov]

Add a description

ubuntu 25.10

/home/ppa/src-yandex/http-redis-proxy/userver-proxy/userver/core/src/server/server.cpp: In member function ‘void userver::v2_15_rc::server::ServerImpl::WriteTotalHandlerStatistics(userver::v2_15_rc::utils::statistics::Writer&) const’:
/home/ppa/src-yandex/http-redis-proxy/userver-proxy/userver/core/src/server/server.cpp:309:25: warning: loop variable ‘handler_ptr’ creates a copy from type ‘const userver::v2_15_rc::utils::NotNull<const userver::v2_15_rc::server::handlers::HttpHandlerBase*>’ [-Wrange-loop-construct]
  309 |         for (const auto handler_ptr : *handlers) {
      |                         ^~~~~~~~~~~
/home/ppa/src-yandex/http-redis-proxy/userver-proxy/userver/core/src/server/server.cpp:309:25: note: use reference type to prevent copying
  309 |         for (const auto handler_ptr : *handlers) {
      |                         ^~~~~~~~~~~
      |                         &
At global scope:
cc1plus: note: unrecognized command-line option ‘-Wno-gnu-zero-variadic-macro-arguments’ may have been intended to silence earlier diagnostics

[apolukhin]

Fixed in 4234da0