Add stream_traits.hpp:

get_lowest_layer, lowest_layer_type are located here now.

CHANGELOG.md

@@ -3,6 +3,7 @@ Version 210:
 * Tidy up read implementation
 * Fix stable_async_op_base javadoc
 * Better handling of stream timeouts
+* Add stream_traits.hpp
 
 --------------------------------------------------------------------------------
 

include/boost/beast/core.hpp

@@ -33,7 +33,6 @@
 #include <boost/beast/core/file_win32.hpp>
 #include <boost/beast/core/flat_buffer.hpp>
 #include <boost/beast/core/flat_static_buffer.hpp>
-#include <boost/beast/core/get_lowest_layer.hpp>
 #include <boost/beast/core/handler_ptr.hpp>
 #include <boost/beast/core/make_printable.hpp>
 #include <boost/beast/core/multi_buffer.hpp>
@@ -42,6 +41,7 @@
 #include <boost/beast/core/span.hpp>
 #include <boost/beast/core/static_buffer.hpp>
 #include <boost/beast/core/static_string.hpp>
+#include <boost/beast/core/stream_traits.hpp>
 #include <boost/beast/core/string.hpp>
 #include <boost/beast/core/string_param.hpp>
 #include <boost/beast/core/timeout_stream.hpp>

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

@@ -7,8 +7,8 @@
 // Official repository: https://github.com/boostorg/beast
 //
 
-#ifndef BOOST_BEAST_DETAIL_GET_LOWEST_LAYER_HPP
-#define BOOST_BEAST_DETAIL_GET_LOWEST_LAYER_HPP
+#ifndef BOOST_BEAST_DETAIL_STREAM_TRAITS_HPP
+#define BOOST_BEAST_DETAIL_STREAM_TRAITS_HPP
 
 #include <boost/type_traits/make_void.hpp>
 #include <type_traits>
@@ -17,6 +17,13 @@ namespace boost {
 namespace beast {
 namespace detail {
 
+//------------------------------------------------------------------------------
+//
+// get_lowest_layer
+// lowest_layer_type
+// detail::has_next_layer
+//
+
 template <class T>
 std::false_type has_next_layer_impl(void*) {}
 
@@ -29,8 +36,6 @@ auto has_next_layer_impl(decltype(nullptr)) ->
 template <class T>
 using has_next_layer = decltype(has_next_layer_impl<T>(nullptr));
 
-//---
-
 template<class T, bool = has_next_layer<T>::value>
 struct lowest_layer_type_impl
 {
@@ -48,8 +53,6 @@ template<class T>
 using lowest_layer_type = typename
     lowest_layer_type_impl<T>::type;
 
-//---
-
 template<class T>
 T&
 get_lowest_layer_impl(
@@ -68,6 +71,8 @@ get_lowest_layer_impl(
             decltype(t.next_layer())>::type>{});
 }
 
+//------------------------------------------------------------------------------
+
 } // detail
 } // beast
 } // boost

include/boost/beast/core/stream_traits.hpp

@@ -7,11 +7,11 @@
 // Official repository: https://github.com/boostorg/beast
 //
 
-#ifndef BOOST_BEAST_GET_LOWEST_LAYER_HPP
-#define BOOST_BEAST_GET_LOWEST_LAYER_HPP
+#ifndef BOOST_BEAST_STREAM_TRAITS_HPP
+#define BOOST_BEAST_STREAM_TRAITS_HPP
 
 #include <boost/beast/core/detail/config.hpp>
-#include <boost/beast/core/detail/get_lowest_layer.hpp>
+#include <boost/beast/core/detail/stream_traits.hpp>
 
 namespace boost {
 namespace beast {

test/beast/core/CMakeLists.txt

@@ -50,7 +50,6 @@ add_executable (tests-beast-core
     file_win32.cpp
     flat_buffer.cpp
     flat_static_buffer.cpp
-    get_lowest_layer.cpp
     handler_ptr.cpp
     make_printable.cpp
     multi_buffer.cpp
@@ -60,6 +59,7 @@ add_executable (tests-beast-core
     span.cpp
     static_buffer.cpp
     static_string.cpp
+    stream_traits.cpp
     string.cpp
     string_param.cpp
     timeout_stream.cpp

test/beast/core/Jamfile

@@ -38,7 +38,6 @@ local SOURCES =
     file_win32.cpp
     flat_buffer.cpp
     flat_static_buffer.cpp
-    get_lowest_layer.cpp
     handler_ptr.cpp
     make_printable.cpp
     multi_buffer.cpp
@@ -48,6 +47,7 @@ local SOURCES =
     span.cpp
     static_buffer.cpp
     static_string.cpp
+    stream_traits.cpp
     string.cpp
     string_param.cpp
     timeout_stream.cpp

test/beast/core/close_socket.cpp

@@ -12,7 +12,7 @@
 
 #include <boost/beast/_experimental/unit_test/suite.hpp>
 #include <boost/beast/_experimental/test/stream.hpp>
-#include <boost/beast/core/get_lowest_layer.hpp>
+#include <boost/beast/core/stream_traits.hpp>
 #include <boost/beast/core/string.hpp>
 
 #include <boost/asio/ip/tcp.hpp>

test/beast/core/stream_traits.cpp

@@ -8,7 +8,7 @@
 //
 
 // Test that header file is self-contained.
-#include <boost/beast/core/get_lowest_layer.hpp>
+#include <boost/beast/core/stream_traits.hpp>
 
 #include <boost/beast/_experimental/unit_test/suite.hpp>
 #include <boost/beast/core/error.hpp>
@@ -17,7 +17,7 @@
 namespace boost {
 namespace beast {
 
-class get_lowest_layer_test
+class stream_traits_test
     : public beast::unit_test::suite
 {
 public:
@@ -186,7 +186,7 @@ public:
     }
 };
 
-BEAST_DEFINE_TESTSUITE(beast,core,get_lowest_layer);
+BEAST_DEFINE_TESTSUITE(beast,core,stream_traits);
 
 } // beast
 } // boost