hide serializer implementation

include/boost/http_proto/impl/serializer.hpp

@@ -13,8 +13,6 @@
 
 #include <boost/http_proto/detail/except.hpp>
 
-#include <numeric>
-
 namespace boost {
 namespace http_proto {
 
@@ -127,11 +125,11 @@ start(
         "ConstBufferSequence type requirements not met");
 
     start_init(m);
-    cbs_gen_ = std::addressof(
-        ws_.emplace<cbs_gen_impl<typename
-        std::decay<ConstBufferSequence>::type>>(
+    start_buffers(
+        m,
+        ws().emplace<cbs_gen_impl<typename
+            std::decay<ConstBufferSequence>::type>>(
                 std::forward<ConstBufferSequence>(cbs)));
-    start_buffers(m);
 }
 
 template<
@@ -152,11 +150,10 @@ start(
         "The Source cannot be constructed with the given arguments");
 
     start_init(m);
-    auto& src = construct_source<Source>(
+    auto& source = ws().emplace<Source>(
         std::forward<Args>(args)...);
-    source_ = std::addressof(src);
-    start_source(m);
-    return src;
+    start_source(m, source);
+    return source;
 }
 
 } // http_proto

include/boost/http_proto/parser.hpp

@@ -621,9 +621,6 @@ class parser
     BOOST_HTTP_PROTO_DECL
     parser(parser&& other) noexcept;
 
-    BOOST_HTTP_PROTO_DECL
-    parser& operator=(parser&& other) noexcept;
-
     BOOST_HTTP_PROTO_DECL
     ~parser();
 

include/boost/http_proto/request_parser.hpp

@@ -107,29 +107,6 @@ class request_parser
     request_parser(
         request_parser&& other) noexcept = default;
 
-    /** Assignment.
-
-        The states of `other` are transferred to
-        `this`, including the allocated buffer.
-        The previous states of `this` are
-        destroyed. After assignment, the only
-        valid operations on the moved-from object
-        are destruction and assignment.
-
-        Buffer sequences previously obtained
-        using @ref prepare or @ref pull_body
-        remain valid.
-
-        @par Complexity
-        Constant.
-
-        @return A reference to this object.
-
-        @param other The parser to assign from.
-    */
-    request_parser& operator=(
-        request_parser&& other) noexcept = default;
-
     /** Destructor.
 
         Any views or buffers obtained from this

include/boost/http_proto/response_parser.hpp

@@ -107,29 +107,6 @@ class response_parser
     response_parser(
         response_parser&& other) noexcept = default;
 
-    /** Assignment.
-
-        The states of `other` are transferred to
-        `this`, including the allocated buffer.
-        The previous states of `this` are
-        destroyed. After assignment, the only
-        valid operations on the moved-from object
-        are destruction and assignemt.
-
-        Buffer sequences previously obtained
-        using @ref prepare or @ref pull_body
-        remain valid.
-
-        @par Complexity
-        Constant.
-
-        @return A reference to this object.
-
-        @param other The parser to assign from.
-    */
-    response_parser& operator=(
-        response_parser&& other) noexcept = default;
-
     /** Destructor.
 
         Any views or buffers obtained from this