In O[U]StringBuffer, make string_view params replacements for OUString ones

...for LIBO_INTERNAL_ONLY, instead of having them as additional overloads.  That
way, loplugin:bufferadd and loplugin:stringviewparam found many further
opportunities for simplification (all addressed here).  Some notes:

* There is no longer an implicit conversion from O[U]String to O[U]StringBuffer
(as that goes via user-defined conversions through string_view now), which was
most noticeable in copy initializations like

  OStringBuffer buf = someStr;

that had to be changed to direct initialization,

  OStringBuffer buf(someStr);

But then again, it wasn't too many places that were affected and I think we can
live with that.

* I made the O[U]StringBuffer ctors taking string_view non-explicit, mainly to
get them in line with their counterparts taking O[U]String.

* I added an OUStringBuffer::lastIndexOf string_view overload that was missing
(relative to OUStringBuffer::indexOf).

* loplugin:stringconstant needed some addition to keep the
compilerplugins/clang/test/stringconstant.cxx checks related to
OStringBuffer::append and OStringBuffer::insert working.

* loplugin:stringviewparam no longer needs the special O[U]StringBuffer-related
code that had been introduced in 1250aecd71fabde4dba990bfceb61bbe8e06b8ea
"loplugin:stringviewparam extend to new.."

Change-Id: Ib1bb8c4632d99b744e742605a9fef6eae959fd72
Reviewed-on: https://gerrit.libreoffice.org/c/core/+/122904
Tested-by: Jenkins
Reviewed-by: Stephan Bergmann <sbergman@redhat.com>

1 files changed, 2 insertions, 1 deletions

diff --git a/cppcanvas/source/mtfrenderer/implrenderer.cxx b/cppcanvas/source/mtfrenderer/implrenderer.cxx
index 14ecdebdaddd..308e4be259dc 100644
--- a/cppcanvas/source/mtfrenderer/implrenderer.cxx
+++ b/cppcanvas/source/mtfrenderer/implrenderer.cxx
@@ -69,6 +69,7 @@
 #include <vector>
 #include <algorithm>
 #include <memory>
+#include <string_view>
 #include "mtftools.hxx"
 
 using namespace ::com::sun::star;
@@ -215,7 +216,7 @@ namespace
         return BitmapEx( aSolid, aMask );
     }
 
-    OUString convertToLocalizedNumerals(const OUString& rStr,
+    OUString convertToLocalizedNumerals(std::u16string_view rStr,
         LanguageType eTextLanguage)
     {
         OUStringBuffer aBuf(rStr);