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/picture.cpp
+++ b/source/gui/widgets/picture.cpp
@@ -74,7 +74,7 @@ namespace nana
 					: impl_{impl}
 				{}

-				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
 				{
 					//Picture doesn't provide a support of vfit and hfit
 					if (!limit_pixels)