No longer need to forward declare the io_context implementation.

asio/include/asio/impl/io_context.hpp

@@ -27,10 +27,10 @@
 
 #include "asio/detail/push_options.hpp"
 
-#if !defined(GENERATING_DOCUMENTATION)
-
 namespace asio {
 
+#if !defined(GENERATING_DOCUMENTATION)
+
 template <typename Service>
 inline Service& use_service(io_context& ioc)
 {
@@ -48,22 +48,8 @@ inline detail::io_context_impl& use_service<detail::io_context_impl>(
   return ioc.impl_;
 }
 
-} // namespace asio
-
 #endif // !defined(GENERATING_DOCUMENTATION)
 
-#include "asio/detail/pop_options.hpp"
-
-#if defined(ASIO_HAS_IOCP)
-# include "asio/detail/win_iocp_io_context.hpp"
-#else
-# include "asio/detail/scheduler.hpp"
-#endif
-
-#include "asio/detail/push_options.hpp"
-
-namespace asio {
-
 inline io_context::executor_type
 io_context::get_executor() ASIO_NOEXCEPT
 {

asio/include/asio/io_context.hpp

@@ -36,16 +36,22 @@
 # include "asio/detail/signal_init.hpp"
 #endif
 
+#if defined(ASIO_HAS_IOCP)
+# include "asio/detail/win_iocp_io_context.hpp"
+#else
+# include "asio/detail/scheduler.hpp"
+#endif
+
 #include "asio/detail/push_options.hpp"
 
 namespace asio {
 
 namespace detail {
 #if defined(ASIO_HAS_IOCP)
-  typedef class win_iocp_io_context io_context_impl;
+  typedef win_iocp_io_context io_context_impl;
   class win_iocp_overlapped_ptr;
 #else
-  typedef class scheduler io_context_impl;
+  typedef scheduler io_context_impl;
 #endif
 
   struct io_context_bits