Refine message class hierarchy:

Two new objects, request_headers and response_headers,
represent the portion of HTTP messages excluding the body.

include/beast/http/impl/write.ipp

@@ -34,7 +34,7 @@ namespace detail {
 template<class DynamicBuffer, class Body, class Headers>
 void
 write_firstline(DynamicBuffer& dynabuf,
-    message_v1<true, Body, Headers> const& msg)
+    message<true, Body, Headers> const& msg)
 {
     write(dynabuf, msg.method);
     write(dynabuf, " ");
@@ -62,7 +62,7 @@ write_firstline(DynamicBuffer& dynabuf,
 template<class DynamicBuffer, class Body, class Headers>
 void
 write_firstline(DynamicBuffer& dynabuf,
-    message_v1<false, Body, Headers> const& msg)
+    message<false, Body, Headers> const& msg)
 {
     switch(msg.version)
     {
@@ -108,7 +108,7 @@ write_fields(DynamicBuffer& dynabuf, FieldSequence const& fields)
 template<bool isRequest, class Body, class Headers>
 struct write_preparation
 {
-    message_v1<isRequest, Body, Headers> const& msg;
+    message<isRequest, Body, Headers> const& msg;
     typename Body::writer w;
     streambuf sb;
     bool chunked;
@@ -116,7 +116,7 @@ struct write_preparation
 
     explicit
     write_preparation(
-            message_v1<isRequest, Body, Headers> const& msg_)
+            message<isRequest, Body, Headers> const& msg_)
         : msg(msg_)
         , w(msg)
         , chunked(token_list{
@@ -161,7 +161,7 @@ class write_op
 
         template<class DeducedHandler>
         data(DeducedHandler&& h_, Stream& s_,
-                message_v1<isRequest, Body, Headers> const& m_)
+                message<isRequest, Body, Headers> const& m_)
             : s(s_)
             , wp(m_)
             , h(std::forward<DeducedHandler>(h_))
@@ -467,7 +467,7 @@ template<class SyncWriteStream,
     bool isRequest, class Body, class Headers>
 void
 write(SyncWriteStream& stream,
-    message_v1<isRequest, Body, Headers> const& msg)
+    message<isRequest, Body, Headers> const& msg)
 {
     static_assert(is_SyncWriteStream<SyncWriteStream>::value,
         "SyncWriteStream requirements not met");
@@ -476,7 +476,7 @@ write(SyncWriteStream& stream,
     static_assert(has_writer<Body>::value,
         "Body has no writer");
     static_assert(is_Writer<typename Body::writer,
-        message_v1<isRequest, Body, Headers>>::value,
+        message<isRequest, Body, Headers>>::value,
             "Writer requirements not met");
     error_code ec;
     write(stream, msg, ec);
@@ -488,7 +488,7 @@ template<class SyncWriteStream,
     bool isRequest, class Body, class Headers>
 void
 write(SyncWriteStream& stream,
-    message_v1<isRequest, Body, Headers> const& msg,
+    message<isRequest, Body, Headers> const& msg,
         error_code& ec)
 {
     static_assert(is_SyncWriteStream<SyncWriteStream>::value,
@@ -498,7 +498,7 @@ write(SyncWriteStream& stream,
     static_assert(has_writer<Body>::value,
         "Body has no writer");
     static_assert(is_Writer<typename Body::writer,
-        message_v1<isRequest, Body, Headers>>::value,
+        message<isRequest, Body, Headers>>::value,
             "Writer requirements not met");
     detail::write_preparation<isRequest, Body, Headers> wp(msg);
     wp.init(ec);
@@ -584,7 +584,7 @@ template<class AsyncWriteStream,
 typename async_completion<
     WriteHandler, void(error_code)>::result_type
 async_write(AsyncWriteStream& stream,
-    message_v1<isRequest, Body, Headers> const& msg,
+    message<isRequest, Body, Headers> const& msg,
         WriteHandler&& handler)
 {
     static_assert(is_AsyncWriteStream<AsyncWriteStream>::value,
@@ -594,7 +594,7 @@ async_write(AsyncWriteStream& stream,
     static_assert(has_writer<Body>::value,
         "Body has no writer");
     static_assert(is_Writer<typename Body::writer,
-        message_v1<isRequest, Body, Headers>>::value,
+        message<isRequest, Body, Headers>>::value,
             "Writer requirements not met");
     beast::async_completion<WriteHandler,
         void(error_code)> completion(handler);
@@ -655,14 +655,14 @@ public:
 template<bool isRequest, class Body, class Headers>
 std::ostream&
 operator<<(std::ostream& os,
-    message_v1<isRequest, Body, Headers> const& msg)
+    message<isRequest, Body, Headers> const& msg)
 {
     static_assert(is_Body<Body>::value,
         "Body requirements not met");
     static_assert(has_writer<Body>::value,
         "Body has no writer");
     static_assert(is_Writer<typename Body::writer,
-        message_v1<isRequest, Body, Headers>>::value,
+        message<isRequest, Body, Headers>>::value,
             "Writer requirements not met");
     detail::ostream_SyncStream oss(os);
     error_code ec;