apply folding expression and std::optional

2017-12-23 00:10:10 +08:00
parent 4917b18c70
commit be836b5b48
11 changed files with 58 additions and 28 deletions
--- a/source/gui/widgets/button.cpp
+++ b/source/gui/widgets/button.cpp
@@ -27,7 +27,7 @@ namespace nana{	namespace drawerbase
 				: trigger_{ t }
 			{}

-			optional<size> measure(graph_reference graph, unsigned limit_pixels, bool /*limit_width*/) const override
+			std::optional<size> measure(graph_reference graph, unsigned limit_pixels, bool /*limit_width*/) const override
 			{
 				//Button doesn't provide a support of vfit and hfit
 				if (limit_pixels)