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>

4 files changed, 4 insertions, 4 deletions

diff --git a/sw/inc/pch/precompiled_msword.hxx b/sw/inc/pch/precompiled_msword.hxx
index 92377e666028..3e8c55bf5942 100644
--- a/sw/inc/pch/precompiled_msword.hxx
+++ b/sw/inc/pch/precompiled_msword.hxx
@@ -340,7 +340,7 @@
 #include <i18nutil/transliteration.hxx>
 #include <o3tl/cow_wrapper.hxx>
 #include <o3tl/enumarray.hxx>
-#include <o3tl/optional.hxx>
+#include <optional>
 #include <o3tl/safeint.hxx>
 #include <o3tl/sorted_vector.hxx>
 #include <o3tl/strong_int.hxx>
diff --git a/sw/inc/pch/precompiled_sw.hxx b/sw/inc/pch/precompiled_sw.hxx
index 83ced7f22e1c..bfd07f24abad 100644
--- a/sw/inc/pch/precompiled_sw.hxx
+++ b/sw/inc/pch/precompiled_sw.hxx
@@ -274,7 +274,7 @@
 #include <o3tl/any.hxx>
 #include <o3tl/cow_wrapper.hxx>
 #include <o3tl/deleter.hxx>
-#include <o3tl/optional.hxx>
+#include <optional>
 #include <o3tl/safeint.hxx>
 #include <o3tl/sorted_vector.hxx>
 #include <o3tl/strong_int.hxx>
diff --git a/sw/inc/pch/precompiled_swui.hxx b/sw/inc/pch/precompiled_swui.hxx
index f84dfe35cd5c..39909eb342bc 100644
--- a/sw/inc/pch/precompiled_swui.hxx
+++ b/sw/inc/pch/precompiled_swui.hxx
@@ -367,7 +367,7 @@
 #include <i18nutil/transliteration.hxx>
 #include <o3tl/cow_wrapper.hxx>
 #include <o3tl/deleter.hxx>
-#include <o3tl/optional.hxx>
+#include <optional>
 #include <o3tl/safeint.hxx>
 #include <o3tl/sorted_vector.hxx>
 #include <o3tl/strong_int.hxx>
diff --git a/sw/inc/pch/precompiled_vbaswobj.hxx b/sw/inc/pch/precompiled_vbaswobj.hxx
index b19ca8c76888..26ed24e28f76 100644
--- a/sw/inc/pch/precompiled_vbaswobj.hxx
+++ b/sw/inc/pch/precompiled_vbaswobj.hxx
@@ -247,7 +247,7 @@
 #include <editeng/svxenum.hxx>
 #include <i18nlangtag/lang.h>
 #include <o3tl/cow_wrapper.hxx>
-#include <o3tl/optional.hxx>
+#include <optional>
 #include <o3tl/sorted_vector.hxx>
 #include <o3tl/strong_int.hxx>
 #include <o3tl/typed_flags_set.hxx>