Fix compile errors under Clang 3.4

fixes boostorg#2030
closes boostorg#2031

CHANGELOG.md

@@ -1,3 +1,4 @@
+* Fix compile errors under Clang 3.4
 * Websocket SSL `teardown` also tears down underlying TCP.
 * Update WebSocket examples to set TLS SNI.
 

example/echo-op/echo_op.cpp

@@ -355,16 +355,16 @@ int main(int argc, char** argv)
     }
 
     namespace net = boost::asio;
-    auto const address{net::ip::make_address(argv[1])};
-    auto const port{static_cast<unsigned short>(std::atoi(argv[2]))};
+    auto const address = net::ip::make_address(argv[1]);
+    auto const port = static_cast<unsigned short>(std::atoi(argv[2]));
 
     using endpoint_type = net::ip::tcp::endpoint;
 
     // Create a listening socket, accept a connection, perform
     // the echo, and then shut everything down and exit.
     net::io_context ioc;
     net::ip::tcp::acceptor acceptor{ioc};
-    endpoint_type ep{address, port};
+    endpoint_type ep(address, port);
     acceptor.open(ep.protocol());
     acceptor.set_option(net::socket_base::reuse_address(true));
     acceptor.bind(ep);

include/boost/beast/http/basic_parser.hpp

@@ -71,7 +71,8 @@ class basic_parser
 {
     boost::optional<std::uint64_t>
         body_limit_ =
-            default_body_limit(is_request{});   // max payload body
+            boost::optional<std::uint64_t>(
+                default_body_limit(is_request{}));   // max payload body
     std::uint64_t len_ = 0;                 // size of chunk or body
     std::uint64_t len0_ = 0;                // content length if known
     std::unique_ptr<char[]> buf_;           // temp storage