io/handle_manage.hpp: is_opened() が無さそうだったので、実装

diff --git a/roast/include/roast/io/handle_manage.hpp b/roast/include/roast/io/handle_manage.hpp
index a4401c6..8240b08 100644 (file)
--- a/roast/include/roast/io/handle_manage.hpp
+++ b/roast/include/roast/io/handle_manage.hpp
@@ -70,6 +70,8 @@ namespace roast
                
                ////////////////////////////////////////////////////
                
+               bool is_opened() const { return m_handle == _Impl::invalid_handle; }
+               
                _HandlerType get_handle(){ return m_handle; }
                const _HandlerType get_handle() const { return m_handle; }