Adapt the remaining OUString functions to std string_view

...for LIBO_INTERNAL_ONLY.  These had been missed by
1b43cceaea2084a0489db68cd0113508f34b6643 "Make many OUString functions take
std::u16string_view parameters" because they did not match the multi-overload
pattern that was addressed there, but they nevertheless benefit from being
changed just as well (witness e.g. the various resulting changes from copy() to
subView()).

This showed a conversion from OStringChar to std::string_view to be missing
(while the corresponding conversion form OUStringChar to std::u16string_view was
already present).

The improvement to loplugin:stringadd became necessary to fix

> [CPT] compilerplugins/clang/test/stringadd.cxx
> error: 'error' diagnostics expected but not seen:
>   File ~/lo/core/compilerplugins/clang/test/stringadd.cxx Line 43 (directive at ~/lo/core/compilerplugins/clang/test/stringadd.cxx:42): simplify by merging with the preceding assignment [loplugin:stringadd]
>   File ~/lo/core/compilerplugins/clang/test/stringadd.cxx Line 61 (directive at ~/lo/core/compilerplugins/clang/test/stringadd.cxx:60): simplify by merging with the preceding assignment [loplugin:stringadd]
> 2 errors generated.

Change-Id: Ie40de0616a66e60e289c1af0ca60aed6f9ecc279
Reviewed-on: https://gerrit.libreoffice.org/c/core/+/107602
Tested-by: Jenkins
Reviewed-by: Stephan Bergmann <sbergman@redhat.com>

1 files changed, 2 insertions, 2 deletions

diff --git a/vcl/source/uitest/logger.cxx b/vcl/source/uitest/logger.cxx
index 9262302e8493..0193bf76074e 100644
--- a/vcl/source/uitest/logger.cxx
+++ b/vcl/source/uitest/logger.cxx
@@ -181,12 +181,12 @@ void UITestLogger::logAction(vcl::Window* const& xUIWin, VclEventId nEvent)
         maStream.WriteLine(OUStringToOString(aAction, RTL_TEXTENCODING_UTF8));
 }
 
-void UITestLogger::log(const OUString& rString)
+void UITestLogger::log(std::u16string_view rString)
 {
     if (!mbValid)
         return;
 
-    if (rString.isEmpty())
+    if (rString.empty())
         return;
 
     maStream.WriteLine(OUStringToOString(rString, RTL_TEXTENCODING_UTF8));