Drop o3tl::optional wrapper

...now that macOS builds are guaranteed to have std::optional since
358146bbbd1b9775c12770fb5e497b6ec5adfc51 "Bump macOS build baseline to
Xcode 11.3 and macOS 10.14.4".

The change is done mostly mechanically with

> for i in $(git grep -Fl optional); do
>  sed -i -e 's:<o3tl/optional\.hxx>\|\"o3tl/optional\.hxx\":<optional>:' \
>   -e 's/\<o3tl::optional\>/std::optional/g' \
>   -e 's/\<o3tl::make_optional\>/std::make_optional/g' "$i"
> done
> for i in $(git grep -Flw o3tl::nullopt); do
>  sed -i -e 's/\<o3tl::nullopt\>/std::nullopt/g' "$i"
> done

(though that causes some of the resulting

#include <optional>

to appear at different places relative to other includes than if they had been
added manually), plus a few manual modifications:

* adapt bin/find-unneeded-includes
* adapt desktop/IwyuFilter_desktop.yaml
* remove include/o3tl/optional.hxx
* quote resulting "<"/">" as "&lt;"/"&gt;" in officecfg/registry/cppheader.xsl
* and then solenv/clang-format/reformat-formatted-files

Change-Id: I68833d9f7945e57aa2bc703349cbc5a56b342273
Reviewed-on: https://gerrit.libreoffice.org/c/core/+/89165
Tested-by: Jenkins
Reviewed-by: Stephan Bergmann <sbergman@redhat.com>

1 files changed, 3 insertions, 3 deletions

diff --git a/include/vcl/event.hxx b/include/vcl/event.hxx
index 900838d11b5c..177442cb474b 100644
--- a/include/vcl/event.hxx
+++ b/include/vcl/event.hxx
@@ -27,7 +27,7 @@
 #include <vcl/vclptr.hxx>
 #include <vcl/outdev.hxx>
 #include <vcl/window.hxx>
-#include <o3tl/optional.hxx>
+#include <optional>
 
 class CommandEvent;
 
@@ -109,7 +109,7 @@ private:
     sal_uInt16          mnCode;
 
     // Set, if the document relative logic position are available
-    o3tl::optional<Point> maLogicPosition;
+    std::optional<Point> maLogicPosition;
 
 public:
     explicit        MouseEvent();
@@ -127,7 +127,7 @@ public:
         maLogicPosition = aLogicPosition;
     }
 
-    o3tl::optional<Point> getLogicPosition() const
+    std::optional<Point> getLogicPosition() const
     {
         return maLogicPosition;
     }