Using `use` for creating modular routes results in errors.

[scm-ns]

I use the following code to create a modular route.

http::basic_router<http_session> router{std::regex::ECMAScript};

http::basic_router<http_session> router__{std::regex::ECMAScript};

router__.get(R"(^/$)", [](http_request beast_http_request, http_context context) {
    context.send(make_200<beast::http::string_body>(beast_http_request, "Main page\n", "text/html"));
});
router.use(R"(/animal$)", router__);

I get this error :

bazel-out/darwin-fastbuild/bin/external/beast_http/_virtual_includes/beast_http/http/base/impl/router.hxx:64:28: error: indirection requires pointer operand ('const _0xdead4ead::http::base::cb::storage<_0xdead4ead::http::reactor::session<boost::beast::http::basic_string_body<char, std::__1::char_traits<char>, std::__1::allocator<char> >, boost::beast::http::parser<true, boost::beast::http::basic_string_body<char, std::__1::char_traits<char>, std::__1::allocator<char> >, std::__1::allocator<char> >, boost::beast::http::serializer<false, boost::beast::http::basic_string_body<char, std::__1::char_traits<char>, std::__1::allocator<char> >, boost::beast::http::basic_fields<std::__1::allocator<char> > >, boost::beast::basic_flat_buffer<std::__1::allocator<char> >, boost::asio::ip::tcp, boost::asio::basic_stream_socket<boost::asio::ip::tcp, boost::asio::executor>, std::__1::chrono::steady_clock, boost::asio::basic_waitable_timer<std::__1::chrono::steady_clock, boost::asio::wait_traits<std::__1::chrono::steady_clock>, boost::asio::executor>, std::function, std::vector, std::map, std::unordered_map, std::function, std::function>, function, vector>' invalid) auto storage = *value.second; ^~~~~~~~~~~~~ bazel-out/darwin-fastbuild/bin/external/beast_http/_virtual_includes/beast_http/http/basic_router.hxx:368:20: note: in instantiation of member function '_0xdead4ead::http::base::router<_0xdead4ead::http::reactor::session<boost::beast::http::basic_string_body<char, std::__1::char_traits<char>, std::__1::allocator<char> >, boost::beast::http::parser<true, boost::beast::http::basic_string_body<char, std::__1::char_traits<char>, std::__1::allocator<char> >, std::__1::allocator<char> >, boost::beast::http::serializer<false, boost::beast::http::basic_string_body<char, std::__1::char_traits<char>, std::__1::allocator<char> >, boost::beast::http::basic_fields<std::__1::allocator<char> > >, boost::beast::basic_flat_buffer<std::__1::allocator<char> >, boost::asio::ip::tcp, boost::asio::basic_stream_socket<boost::asio::ip::tcp, boost::asio::executor>, std::__1::chrono::steady_clock, boost::asio::basic_waitable_timer<std::__1::chrono::steady_clock, boost::asio::wait_traits<std::__1::chrono::steady_clock>, boost::asio::executor>, std::function, std::vector, std::map, std::unordered_map, std::function, std::function> >::use' requested here base_type::use(path_to_resource, other); ^ src/server.cpp:21:12: note: in instantiation of member function '_0xdead4ead::http::basic_router<_0xdead4ead::http::reactor::session<boost::beast::http::basic_string_body<char, std::__1::char_traits<char>, std::__1::allocator<char> >, boost::beast::http::parser<true, boost::beast::http::basic_string_body<char, std::__1::char_traits<char>, std::__1::allocator<char> >, std::__1::allocator<char> >, boost::beast::http::serializer<false, boost::beast::http::basic_string_body<char, std::__1::char_traits<char>, std::__1::allocator<char> >, boost::beast::http::basic_fields<std::__1::allocator<char> > >, boost::beast::basic_flat_buffer<std::__1::allocator<char> >, boost::asio::ip::tcp, boost::asio::basic_stream_socket<boost::asio::ip::tcp, boost::asio::executor>, std::__1::chrono::steady_clock, boost::asio::basic_waitable_timer<std::__1::chrono::steady_clock, boost::asio::wait_traits<std::__1::chrono::steady_clock>, boost::asio::executor>, std::function, std::vector, std::map, std::unordered_map, std::function, std::function> >::use' requested here router.use(R"(/animal$)", router__); ^ In file included from src/server.cpp:1: In file included from src/utils.hpp:4: In file included from bazel-out/darwin-fastbuild/bin/external/beast_http/_virtual_includes/beast_http/http/basic_router.hxx:4: In file included from bazel-out/darwin-fastbuild/bin/external/beast_http/_virtual_includes/beast_http/http/base/router.hxx:110: bazel-out/darwin-fastbuild/bin/external/beast_http/_virtual_includes/beast_http/http/base/impl/router.hxx:76:32: error: indirection requires pointer operand ('const _0xdead4ead::http::base::cb::storage<_0xdead4ead::http::reactor::session<boost::beast::http::basic_string_body<char, std::__1::char_traits<char>, std::__1::allocator<char> >, boost::beast::http::parser<true, boost::beast::http::basic_string_body<char, std::__1::char_traits<char>, std::__1::allocator<char> >, std::__1::allocator<char> >, boost::beast::http::serializer<false, boost::beast::http::basic_string_body<char, std::__1::char_traits<char>, std::__1::allocator<char> >, boost::beast::http::basic_fields<std::__1::allocator<char> > >, boost::beast::basic_flat_buffer<std::__1::allocator<char> >, boost::asio::ip::tcp, boost::asio::basic_stream_socket<boost::asio::ip::tcp, boost::asio::executor>, std::__1::chrono::steady_clock, boost::asio::basic_waitable_timer<std::__1::chrono::steady_clock, boost::asio::wait_traits<std::__1::chrono::steady_clock>, boost::asio::executor>, std::function, std::vector, std::map, std::unordered_map, std::function, std::function>, function, vector>' invalid) auto storage = *value_r.second;

Essentially it looks like line : https://github.com/0xdead4ead/BeastHttp/blob/f4c3bda9ebc06a2ed127911f6cee39db1236f007/BeastHttp/include/http/base/impl/router.hxx#L76 is causing some issue.

C++ 11; Bazel; Mac