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
@@ -340,7 +340,7 @@ jobs:
             b2-toolset: "gcc"
             is-latest: true
             name: "GCC 15: C++17-20 (ubsan)"
-            shared: true
+            shared: false
             ubsan: true
             build-type: "RelWithDebInfo"
 
@@ -614,7 +614,7 @@ jobs:
             b2-toolset: "clang"
             is-latest: true
             name: "Clang 20: C++23-2C (ubsan, x86)"
-            shared: true
+            shared: false
             ubsan: true
             x86: true
             build-type: "RelWithDebInfo"

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

@@ -63,8 +63,7 @@ struct Request : basic_request
 
 /** Response object for HTTP route handlers
 */
-struct BOOST_SYMBOL_VISIBLE
-    Response : basic_response
+struct Response : basic_response
 {
     /** The HTTP response message
     */
@@ -87,16 +86,23 @@ struct BOOST_SYMBOL_VISIBLE
     */
     capy::datastore data;
 
+    /** Constructor.
+    */
+    BOOST_HTTP_PROTO_DECL
+    Response();
+
     /** Destructor.
     */
-    BOOST_HTTP_PROTO_DECL virtual ~Response();
+    BOOST_HTTP_PROTO_DECL
+    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();
+    BOOST_HTTP_PROTO_DECL
+    void reset();
 
     /** Set the status code of the response.
         @par Example

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

src/server/route_handler.cpp

@@ -15,6 +15,11 @@
 namespace boost {
 namespace http_proto {
 
+Response::
+Response()
+{
+}
+
 Response::
 ~Response()
 {