is_completion_handler, type_traits.hpp are deprecated (API Change):

* is_completion_handler is deprecated
* type_traits.hpp is a deprecated include

These items will be removed in the next version

* Include the new header file for the types needed:
  - stream_traits.hpp
  - file_base.hpp
* Use std::is_invocable instead of is_completion_handler

include/boost/beast/_experimental/core/flat_stream.hpp

@@ -12,7 +12,6 @@
 
 #include <boost/beast/core/detail/config.hpp>
 #include <boost/beast/core/error.hpp>
-#include <boost/beast/core/type_traits.hpp>
 #include <boost/beast/_experimental/core/detail/flat_stream.hpp>
 #include <boost/asio/async_result.hpp>
 #include <cstdlib>

include/boost/beast/_experimental/http/icy_stream.hpp

@@ -12,8 +12,8 @@
 
 #include <boost/beast/core/detail/config.hpp>
 #include <boost/beast/core/error.hpp>
-#include <boost/beast/core/type_traits.hpp>
 #include <boost/asio/async_result.hpp>
+#include <boost/asio/buffer.hpp>
 #include <type_traits>
 
 namespace boost {

include/boost/beast/_experimental/test/stream.hpp

@@ -13,7 +13,6 @@
 #include <boost/beast/core/bind_handler.hpp>
 #include <boost/beast/core/flat_buffer.hpp>
 #include <boost/beast/core/string.hpp>
-#include <boost/beast/core/type_traits.hpp>
 #include <boost/beast/websocket/role.hpp>
 #include <boost/beast/_experimental/test/fail_count.hpp>
 #include <boost/asio/async_result.hpp>

include/boost/beast/core.hpp

@@ -45,6 +45,5 @@
 #include <boost/beast/core/string.hpp>
 #include <boost/beast/core/string_param.hpp>
 #include <boost/beast/core/timeout_stream.hpp>
-#include <boost/beast/core/type_traits.hpp>
 
 #endif

include/boost/beast/core/basic_timeout_stream.hpp

@@ -13,7 +13,6 @@
 #include <boost/beast/core/detail/config.hpp>
 #include <boost/beast/core/detail/timeout_stream_base.hpp>
 #include <boost/beast/core/error.hpp>
-#include <boost/beast/core/type_traits.hpp>
 #include <boost/asio/async_result.hpp>
 #include <boost/asio/basic_stream_socket.hpp>
 #include <boost/asio/connect.hpp>

include/boost/beast/core/bind_handler.hpp

@@ -11,7 +11,6 @@
 #define BOOST_BEAST_BIND_HANDLER_HPP
 
 #include <boost/beast/core/detail/config.hpp>
-#include <boost/beast/core/type_traits.hpp>
 #include <boost/beast/core/detail/bind_handler.hpp>
 #include <type_traits>
 #include <utility>
@@ -65,12 +64,6 @@ detail::bind_wrapper<
 #endif
 bind_handler(Handler&& handler, Args&&... args)
 {
-#if 0
-    // Can't do this because of placeholders
-    static_assert(is_completion_handler<
-        Handler, void(Args...)>::value,
-            "Handler requirements not met");
-#endif
     return detail::bind_wrapper<
         typename std::decay<Handler>::type,
         typename std::decay<Args>::type...>(

include/boost/beast/core/buffered_read_stream.hpp

@@ -14,7 +14,6 @@
 #include <boost/beast/core/error.hpp>
 #include <boost/beast/core/multi_buffer.hpp>
 #include <boost/beast/core/stream_traits.hpp>
-#include <boost/beast/core/type_traits.hpp>
 #include <boost/asio/async_result.hpp>
 #include <boost/asio/buffer.hpp>
 #include <boost/asio/io_context.hpp>

include/boost/beast/core/detail/type_traits.hpp

@@ -133,10 +133,10 @@ struct is_contiguous_container<T, E, void_t<
     expected by the initiating function,
 */
 #define BOOST_BEAST_HANDLER_INIT(type, sig) \
-    static_assert(boost::beast::is_completion_handler< \
+    static_assert(::boost::beast::detail::is_invocable< \
     BOOST_ASIO_HANDLER_TYPE(type, sig), sig>::value, \
     "CompletionHandler signature requirements not met"); \
-    net::async_completion<type, sig> init{handler}
+    ::boost::beast::net::async_completion<type, sig> init{handler}
 
 } // detail
 } // beast

include/boost/beast/core/impl/buffered_read_stream.hpp

@@ -15,7 +15,7 @@
 #include <boost/beast/core/error.hpp>
 #include <boost/beast/core/read_size.hpp>
 #include <boost/beast/core/stream_traits.hpp>
-#include <boost/beast/core/type_traits.hpp>
+#include <boost/beast/core/detail/type_traits.hpp>
 #include <boost/asio/post.hpp>
 #include <boost/throw_exception.hpp>
 
@@ -123,7 +123,7 @@ async_write_some(
     static_assert(net::is_const_buffer_sequence<
         ConstBufferSequence>::value,
             "ConstBufferSequence requirements not met");
-    static_assert(is_completion_handler<WriteHandler,
+    static_assert(detail::is_invocable<WriteHandler,
         void(error_code, std::size_t)>::value,
             "WriteHandler requirements not met");
     return next_layer_.async_write_some(buffers,

include/boost/beast/core/impl/read_size.hpp

@@ -10,6 +10,7 @@
 #ifndef BOOST_BEAST_IMPL_READ_SIZE_HPP
 #define BOOST_BEAST_IMPL_READ_SIZE_HPP
 
+#include <boost/asio/buffer.hpp>
 #include <boost/assert.hpp>
 #include <stdexcept>
 #include <type_traits>

include/boost/beast/core/ostream.hpp

@@ -11,7 +11,6 @@
 #define BOOST_BEAST_WRITE_OSTREAM_HPP
 
 #include <boost/beast/core/detail/config.hpp>
-#include <boost/beast/core/type_traits.hpp>
 #include <boost/beast/core/detail/ostream.hpp>
 #include <type_traits>
 #include <streambuf>

include/boost/beast/core/read_size.hpp

@@ -11,7 +11,6 @@
 #define BOOST_BEAST_READ_SIZE_HELPER_HPP
 
 #include <boost/beast/core/detail/config.hpp>
-#include <boost/beast/core/type_traits.hpp>
 #include <boost/throw_exception.hpp>
 
 namespace boost {

include/boost/beast/core/type_traits.hpp

@@ -10,40 +10,32 @@
 #ifndef BOOST_BEAST_TYPE_TRAITS_HPP
 #define BOOST_BEAST_TYPE_TRAITS_HPP
 
-#include <boost/beast/core/detail/config.hpp>
+#ifndef BOOST_BEAST_DOXYGEN
+
+BOOST_PRAGMA_MESSAGE("<boost/beast/core/type_traits.hpp> is DEPRECATED and will be removed in a future release.")
+
 #include <boost/beast/core/file_base.hpp>
+#include <boost/beast/core/stream_traits.hpp>
 #include <boost/beast/core/detail/is_invocable.hpp>
-#include <boost/beast/core/detail/type_traits.hpp>
-#include <boost/asio/buffer.hpp>
-#include <type_traits>
+#include <boost/config/pragma_message.hpp>
+#include <type_traits.hpp>
 
 namespace boost {
 namespace beast {
 
-//------------------------------------------------------------------------------
-//
-// Handler concepts
-//
-//------------------------------------------------------------------------------
-
 /** Determine if `T` meets the requirements of @b CompletionHandler.
-
     This trait checks whether a type meets the requirements for a completion
     handler, and is also callable with the specified signature.
     Metafunctions are used to perform compile time checking of template
     types. This type will be `std::true_type` if `T` meets the requirements,
     else the type will be `std::false_type`. 
-
     @par Example
-
     Use with `static_assert`:
-
     @code
     struct handler
     {
         void operator()(error_code&);
     };
-
     static_assert(is_completion_handler<handler, void(error_code&)>::value,
         "Not a completion handler");
     @endcode
@@ -61,3 +53,5 @@ using is_completion_handler = std::integral_constant<bool,
 } // boost
 
 #endif
+
+#endif

include/boost/beast/http/basic_dynamic_body.hpp

@@ -12,7 +12,6 @@
 
 #include <boost/beast/core/detail/config.hpp>
 #include <boost/beast/core/buffer_size.hpp>
-#include <boost/beast/core/type_traits.hpp>
 #include <boost/beast/core/detail/buffer.hpp>
 #include <boost/beast/http/error.hpp>
 #include <boost/beast/http/message.hpp>

include/boost/beast/http/detail/chunk_encode.hpp

@@ -10,7 +10,6 @@
 #ifndef BOOST_BEAST_HTTP_DETAIL_CHUNK_ENCODE_HPP
 #define BOOST_BEAST_HTTP_DETAIL_CHUNK_ENCODE_HPP
 
-#include <boost/beast/core/type_traits.hpp>
 #include <boost/beast/http/type_traits.hpp>
 #include <boost/asio/buffer.hpp>
 #include <algorithm>

include/boost/beast/http/impl/basic_parser.ipp

@@ -12,7 +12,6 @@
 
 #include <boost/beast/core/buffer_size.hpp>
 #include <boost/beast/core/static_string.hpp>
-#include <boost/beast/core/type_traits.hpp>
 #include <boost/beast/core/detail/clamp.hpp>
 #include <boost/beast/core/detail/config.hpp>
 #include <boost/beast/http/error.hpp>

include/boost/beast/http/impl/file_body_win32.ipp

@@ -15,7 +15,6 @@
 #include <boost/beast/core/async_op_base.hpp>
 #include <boost/beast/core/bind_handler.hpp>
 #include <boost/beast/core/buffers_range.hpp>
-#include <boost/beast/core/type_traits.hpp>
 #include <boost/beast/core/detail/clamp.hpp>
 #include <boost/beast/http/serializer.hpp>
 #include <boost/asio/async_result.hpp>

include/boost/beast/http/impl/write.ipp

@@ -16,7 +16,6 @@
 #include <boost/beast/core/buffers_range.hpp>
 #include <boost/beast/core/ostream.hpp>
 #include <boost/beast/core/stream_traits.hpp>
-#include <boost/beast/core/type_traits.hpp>
 #include <boost/asio/coroutine.hpp>
 #include <boost/asio/post.hpp>
 #include <boost/asio/write.hpp>

include/boost/beast/http/serializer.hpp

@@ -15,7 +15,6 @@
 #include <boost/beast/core/buffers_prefix.hpp>
 #include <boost/beast/core/buffers_suffix.hpp>
 #include <boost/beast/core/string.hpp>
-#include <boost/beast/core/type_traits.hpp>
 #include <boost/beast/core/detail/variant.hpp>
 #include <boost/beast/http/message.hpp>
 #include <boost/beast/http/chunk_encode.hpp>

include/boost/beast/http/type_traits.hpp

@@ -13,7 +13,6 @@
 #include <boost/beast/core/detail/config.hpp>
 #include <boost/beast/core/error.hpp>
 #include <boost/beast/core/string.hpp>
-#include <boost/beast/core/type_traits.hpp>
 #include <boost/beast/http/detail/type_traits.hpp>
 #include <boost/asio/buffer.hpp>
 #include <boost/optional.hpp>

include/boost/beast/websocket/impl/close.hpp

@@ -15,7 +15,6 @@
 #include <boost/beast/core/async_op_base.hpp>
 #include <boost/beast/core/flat_static_buffer.hpp>
 #include <boost/beast/core/stream_traits.hpp>
-#include <boost/beast/core/type_traits.hpp>
 #include <boost/beast/core/detail/config.hpp>
 #include <boost/asio/coroutine.hpp>
 #include <boost/asio/post.hpp>

include/boost/beast/websocket/impl/handshake.hpp

@@ -17,7 +17,6 @@
 #include <boost/beast/http/write.hpp>
 #include <boost/beast/core/async_op_base.hpp>
 #include <boost/beast/core/stream_traits.hpp>
-#include <boost/beast/core/type_traits.hpp>
 #include <boost/asio/coroutine.hpp>
 #include <boost/assert.hpp>
 #include <boost/throw_exception.hpp>

include/boost/beast/websocket/impl/ping.hpp

@@ -13,7 +13,6 @@
 #include <boost/beast/core/async_op_base.hpp>
 #include <boost/beast/core/bind_handler.hpp>
 #include <boost/beast/core/stream_traits.hpp>
-#include <boost/beast/core/type_traits.hpp>
 #include <boost/beast/websocket/detail/frame.hpp>
 #include <boost/asio/coroutine.hpp>
 #include <boost/asio/post.hpp>

include/boost/beast/websocket/impl/read.hpp

@@ -19,7 +19,6 @@
 #include <boost/beast/core/buffers_suffix.hpp>
 #include <boost/beast/core/flat_static_buffer.hpp>
 #include <boost/beast/core/stream_traits.hpp>
-#include <boost/beast/core/type_traits.hpp>
 #include <boost/beast/core/detail/buffer.hpp>
 #include <boost/beast/core/detail/clamp.hpp>
 #include <boost/beast/core/detail/config.hpp>

include/boost/beast/websocket/impl/stream.hpp

@@ -23,7 +23,6 @@
 #include <boost/beast/core/buffers_prefix.hpp>
 #include <boost/beast/core/buffers_suffix.hpp>
 #include <boost/beast/core/flat_static_buffer.hpp>
-#include <boost/beast/core/type_traits.hpp>
 #include <boost/beast/core/detail/clamp.hpp>
 #include <boost/beast/core/detail/type_traits.hpp>
 #include <boost/asio/bind_executor.hpp>

include/boost/beast/websocket/impl/teardown.hpp

@@ -13,7 +13,7 @@
 #include <boost/beast/core/async_op_base.hpp>
 #include <boost/beast/core/bind_handler.hpp>
 #include <boost/beast/core/stream_traits.hpp>
-#include <boost/beast/core/type_traits.hpp>
+#include <boost/beast/core/detail/type_traits.hpp>
 #include <boost/asio/coroutine.hpp>
 #include <boost/asio/post.hpp>
 #include <memory>
@@ -168,7 +168,7 @@ async_teardown(
     net::ip::tcp::socket& socket,
     TeardownHandler&& handler)
 {
-    static_assert(beast::is_completion_handler<
+    static_assert(beast::detail::is_invocable<
         TeardownHandler, void(error_code)>::value,
             "TeardownHandler requirements not met");
     detail::teardown_tcp_op<typename std::decay<

include/boost/beast/websocket/impl/write.hpp

@@ -20,7 +20,6 @@
 #include <boost/beast/core/buffers_suffix.hpp>
 #include <boost/beast/core/flat_static_buffer.hpp>
 #include <boost/beast/core/stream_traits.hpp>
-#include <boost/beast/core/type_traits.hpp>
 #include <boost/beast/core/detail/clamp.hpp>
 #include <boost/beast/core/detail/config.hpp>
 #include <boost/beast/websocket/detail/frame.hpp>