chore: fix MinGW builds

Author: Your Name

.github/workflows/ci.yml

@@ -134,11 +134,11 @@ jobs:
             runs-on: "windows-2022"
             b2-toolset: "gcc"
             generator: "MinGW Makefiles"
-            is-latest: false
+            is-latest: true
             is-earliest: true
-            name: "MinGW"
+            name: "MinGW (shared)"
             shared: true
-            build-type: "Release"
+            build-type: "Debug"
             build-cmake: true
 
           - compiler: "mingw"
@@ -148,9 +148,9 @@ jobs:
             runs-on: "windows-2022"
             b2-toolset: "gcc"
             generator: "MinGW Makefiles"
-            is-latest: false
+            is-latest: true
             is-earliest: true
-            name: "MinGW"
+            name: "MinGW (static)"
             shared: false
             build-type: "Release"
             build-cmake: true

include/boost/http_proto/server/basic_router.hpp

@@ -142,9 +142,9 @@ class any_router
     friend class http_proto::basic_router;
     using opt_flags = unsigned int;
 
-    struct BOOST_SYMBOL_VISIBLE any_handler
+    struct BOOST_HTTP_PROTO_DECL any_handler
     {
-        BOOST_HTTP_PROTO_DECL virtual ~any_handler();
+        virtual ~any_handler() = default;
         virtual std::size_t count() const noexcept = 0;
         virtual route_result invoke(
             basic_request&, basic_response&) const = 0;

include/boost/http_proto/server/route_handler.hpp

@@ -63,7 +63,7 @@ struct Request : basic_request
 
 /** Response object for HTTP route handlers
 */
-struct BOOST_SYMBOL_VISIBLE
+struct BOOST_HTTP_PROTO_DECL
     Response : basic_response
 {
     /** The HTTP response message
@@ -89,14 +89,14 @@ struct BOOST_SYMBOL_VISIBLE
 
     /** Destructor.
     */
-    BOOST_HTTP_PROTO_DECL virtual ~Response();
+    virtual ~Response();
 
     /** Reset the object for a new request.
         This clears any state associated with
         the previous request, preparing the object
         for use with a new request.
     */
-    BOOST_HTTP_PROTO_DECL void reset();
+    void reset();
 
     /** Set the status code of the response.
         @par Example
@@ -106,11 +106,9 @@ struct BOOST_SYMBOL_VISIBLE
         @param code The status code to set.
         @return A reference to this response.
     */
-    BOOST_HTTP_PROTO_DECL
     Response&
     status(http_proto::status code);
 
-    BOOST_HTTP_PROTO_DECL
     Response&
     set_body(std::string s);
 
@@ -168,7 +166,6 @@ struct BOOST_SYMBOL_VISIBLE
         Subclasses must schedule task_ to be invoked at an unspecified
         point in the future.
     */
-    BOOST_HTTP_PROTO_DECL
     virtual void do_post();
 
     std::unique_ptr<task> task_;

include/boost/http_proto/sink.hpp

@@ -36,7 +36,7 @@ namespace http_proto {
         @ref source,
         @ref parser.
 */
-struct BOOST_SYMBOL_VISIBLE
+struct BOOST_HTTP_PROTO_DECL
     sink
 {
     /** The results of consuming data.
@@ -188,7 +188,6 @@ struct BOOST_SYMBOL_VISIBLE
         @param more `true` if there will be one
         or more subsequent calls.
     */
-    BOOST_HTTP_PROTO_DECL
     virtual
     results
     on_write(

include/boost/http_proto/source.hpp

@@ -36,7 +36,7 @@ namespace http_proto {
         @ref sink,
         @ref serializer.
 */
-struct BOOST_SYMBOL_VISIBLE
+struct BOOST_HTTP_PROTO_DECL
     source
 {
     /** The results of producing data.
@@ -191,7 +191,6 @@ struct BOOST_SYMBOL_VISIBLE
         indicate failure or that no more
         data remains (or both).
     */
-    BOOST_HTTP_PROTO_DECL
     virtual
     results
     on_read(

src/server/basic_router.cpp

@@ -80,11 +80,6 @@ pattern     target      path(use)    path(get)
 
 //------------------------------------------------
 
-
-any_router::any_handler::~any_handler() = default;
-
-//------------------------------------------------
-
 /*
 static
 void