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/sw/source/uibase/inc/PageBreakWin.hxx b/sw/source/uibase/inc/PageBreakWin.hxx
index 395006103614..982c81e157a4 100644
--- a/sw/source/uibase/inc/PageBreakWin.hxx
+++ b/sw/source/uibase/inc/PageBreakWin.hxx
@@ -13,7 +13,7 @@
 #include "FrameControl.hxx"
 #include <vcl/builder.hxx>
 #include <vcl/timer.hxx>
-#include <o3tl/optional.hxx>
+#include <optional>
 
 class Menu;
 class SwPageFrame;
@@ -34,7 +34,7 @@ class SwPageBreakWin : public SwFrameMenuButtonBase
     Timer                 m_aFadeTimer;
     bool                  m_bDestroyed;
 
-    o3tl::optional<Point> m_xMousePt;
+    std::optional<Point> m_xMousePt;
 
 public:
     SwPageBreakWin( SwEditWin* pEditWin, const SwFrame *pFrame );
@@ -46,7 +46,7 @@ public:
     virtual void MouseMove( const MouseEvent& rMEvt ) override;
     virtual void Activate( ) override;
 
-    void UpdatePosition(const o3tl::optional<Point>& xEvtPt = o3tl::optional<Point>());
+    void UpdatePosition(const std::optional<Point>& xEvtPt = std::optional<Point>());
 
     virtual void ShowAll( bool bShow ) override;
     virtual bool Contains( const Point &rDocPt ) const override;