A more lightweight O[U]StringConcatenation

...compared to a full-blown O[U]String, for temporary objects holding an
O[U]StringConcat result that can then be used as a std::[u16]string_view.

It's instructive to see how some invocations of operator ==, operator !=, and
O[U]StringBuffer::insert with an O[U]StringConcat argument required implicit
materialization of an O[U]String temporary, and how that expensive operation has
now been made explicit with the explicit O[U]StringConcatenation ctor.

(The additional operator == and operator != overloads are necessary because the
overloads taking two std::[u16]string_view parameters wouldn't even be found
here with ADL.  And the OUString-related ones would cause ambiguities in at
least sal/qa/rtl/strings/test_oustring_stringliterals.cxx built with
RTL_STRING_UNITTEST, so have simply been disabled for that special test-code
case.)

Change-Id: Id29799fa8da21a09ff9794cbc7cc9b366e6803b8
Reviewed-on: https://gerrit.libreoffice.org/c/core/+/122890
Tested-by: Jenkins
Reviewed-by: Noel Grandin <noel.grandin@collabora.co.uk>
Reviewed-by: Stephan Bergmann <sbergman@redhat.com>

1 files changed, 8 insertions, 8 deletions

diff --git a/xmlsecurity/source/helper/documentsignaturehelper.cxx b/xmlsecurity/source/helper/documentsignaturehelper.cxx
index e05e1ee1aac2..5852d16afd39 100644
--- a/xmlsecurity/source/helper/documentsignaturehelper.cxx
+++ b/xmlsecurity/source/helper/documentsignaturehelper.cxx
@@ -199,7 +199,7 @@ DocumentSignatureHelper::CreateElementList(
                 {
                     Reference < css::embed::XStorage > xSubStore = rxStore->openStorageElement( aSubStorageName, css::embed::ElementModes::READ );
                     ImplFillElementList(
-                        aElements, xSubStore, OUString(aSubStorageName+aSep), true, mode);
+                        aElements, xSubStore, OUStringConcatenation(aSubStorageName+aSep), true, mode);
                 }
                 catch(css::io::IOException& )
                 {
@@ -211,7 +211,7 @@ DocumentSignatureHelper::CreateElementList(
                 {
                     Reference < css::embed::XStorage > xSubStore = rxStore->openStorageElement( aSubStorageName, css::embed::ElementModes::READ );
                     ImplFillElementList(
-                        aElements, xSubStore, OUString(aSubStorageName+aSep), true, mode);
+                        aElements, xSubStore, OUStringConcatenation(aSubStorageName+aSep), true, mode);
                     xSubStore.clear();
 
                     // Object folders...
@@ -222,7 +222,7 @@ DocumentSignatureHelper::CreateElementList(
                         {
                             Reference < css::embed::XStorage > xTmpSubStore = rxStore->openStorageElement( rName, css::embed::ElementModes::READ );
                             ImplFillElementList(
-                                aElements, xTmpSubStore, OUString(rName+aSep), true, mode);
+                                aElements, xTmpSubStore, OUStringConcatenation(rName+aSep), true, mode);
                         }
                     }
                 }
@@ -246,7 +246,7 @@ DocumentSignatureHelper::CreateElementList(
             {
                 Reference < css::embed::XStorage > xSubStore = rxStore->openStorageElement( aSubStorageName, css::embed::ElementModes::READ );
                 ImplFillElementList(
-                    aElements, xSubStore, OUString(aSubStorageName+aSep), true, mode);
+                    aElements, xSubStore, OUStringConcatenation(aSubStorageName+aSep), true, mode);
             }
             catch( css::io::IOException& )
             {
@@ -259,7 +259,7 @@ DocumentSignatureHelper::CreateElementList(
             {
                 Reference < css::embed::XStorage > xSubStore = rxStore->openStorageElement( aSubStorageName, css::embed::ElementModes::READ );
                 ImplFillElementList(
-                    aElements, xSubStore, OUString(aSubStorageName+aSep), true, mode);
+                    aElements, xSubStore, OUStringConcatenation(aSubStorageName+aSep), true, mode);
             }
             catch( css::io::IOException& )
             {
@@ -271,7 +271,7 @@ DocumentSignatureHelper::CreateElementList(
             {
                 Reference < css::embed::XStorage > xSubStore = rxStore->openStorageElement( aSubStorageName, css::embed::ElementModes::READ );
                 ImplFillElementList(
-                    aElements, xSubStore, OUString(aSubStorageName+aSep), true, mode);
+                    aElements, xSubStore, OUStringConcatenation(aSubStorageName+aSep), true, mode);
             }
             catch( css::io::IOException& )
             {
@@ -310,7 +310,7 @@ void DocumentSignatureHelper::AppendContentTypes(const uno::Reference<embed::XSt
     {
         auto it = std::find_if(rOverrides.begin(), rOverrides.end(), [&](const beans::StringPair& rPair)
         {
-            return rPair.First == "/" + rElement;
+            return rPair.First == OUStringConcatenation("/" + rElement);
         });
 
         if (it != rOverrides.end())
@@ -321,7 +321,7 @@ void DocumentSignatureHelper::AppendContentTypes(const uno::Reference<embed::XSt
 
         it = std::find_if(rDefaults.begin(), rDefaults.end(), [&](const beans::StringPair& rPair)
         {
-            return rElement.endsWith(OUString("." + rPair.First));
+            return rElement.endsWith(OUStringConcatenation("." + rPair.First));
         });
 
         if (it != rDefaults.end())