From a92b3e4274a183fe85015530b208ef9e2d88e47a Mon Sep 17 00:00:00 2001
From: Leonardo Backes Vargas <awesomecpp@gmail.com>
Date: Sun, 28 May 2017 12:16:26 -0300
Subject: [PATCH] Fix constness on const functions with nana::any and related
 casts.

---
 include/nana/gui/widgets/listbox.hpp | 2 +-
 include/nana/gui/widgets/tabbar.hpp  | 4 ++--
 2 files changed, 3 insertions(+), 3 deletions(-)

diff --git a/include/nana/gui/widgets/listbox.hpp b/include/nana/gui/widgets/listbox.hpp
index f3cc09df..552b2e36 100644
--- a/include/nana/gui/widgets/listbox.hpp
+++ b/include/nana/gui/widgets/listbox.hpp
@@ -893,7 +893,7 @@ namespace nana
 				}
 
 				template<typename T>
-				T* value_ptr() const
+				T const * value_ptr() const
 				{
 					return any_cast<T>(_m_value());
 				}
diff --git a/include/nana/gui/widgets/tabbar.hpp b/include/nana/gui/widgets/tabbar.hpp
index f22e6e5c..0e2e2e9c 100644
--- a/include/nana/gui/widgets/tabbar.hpp
+++ b/include/nana/gui/widgets/tabbar.hpp
@@ -237,9 +237,9 @@ namespace nana
 			return this->get_drawer_trigger().activated();
 		}
 
-		value_type & at(std::size_t pos) const        /// Returns pos'th element
+		value_type const & at(std::size_t pos) const        /// Returns pos'th element
 		{
-			return static_cast<value_type&>(this->get_drawer_trigger().at(pos));
+			return any_cast<value_type&>(this->get_drawer_trigger().at(pos));
 		}
 
 		void close_fly(bool fly)                    /// Draw or not a close button in each tab.