loplugin:stringadd convert chained append to +

which can use the more efficient *StringConcat

Also fix a crash in stringview plugin which
started happening while I working on this.

Change-Id: I91a5b9b7707d1594d27d80b73930f5afac8ae608
Reviewed-on: https://gerrit.libreoffice.org/c/core/+/114568
Tested-by: Jenkins
Reviewed-by: Noel Grandin <noel.grandin@collabora.co.uk>

115 files changed, 521 insertions, 577 deletions

diff --git a/UnoControls/source/controls/progressmonitor.cxx b/UnoControls/source/controls/progressmonitor.cxx
index 05296e35915b..de9d596513de 100644
--- a/UnoControls/source/controls/progressmonitor.cxx
+++ b/UnoControls/source/controls/progressmonitor.cxx
@@ -722,7 +722,7 @@ void ProgressMonitor::impl_rebuildFixedText ()
         // "\n" MUST BE at the end of line!!! => Else ... topic and his text are not in the same line!!!
         for (auto const & pSearchItem : maTextlist_Top)
         {
-            aCollectString.append(pSearchItem->sTopic).append("\n");
+            aCollectString.append(pSearchItem->sTopic + "\n");
         }
 
         m_xTopic_Top->setText ( aCollectString.makeStringAndClear() );
@@ -737,7 +737,7 @@ void ProgressMonitor::impl_rebuildFixedText ()
         // "\n" MUST BE at the end of line!!! => Else ... topic and his text are not in the same line!!!
         for (auto const & pSearchItem : maTextlist_Top)
         {
-            aCollectString.append(pSearchItem->sText).append("\n");
+            aCollectString.append(pSearchItem->sText + "\n");
         }
 
         m_xText_Top->setText ( aCollectString.makeStringAndClear() );
@@ -754,7 +754,7 @@ void ProgressMonitor::impl_rebuildFixedText ()
         // "\n" MUST BE at the end of line!!! => Else ... topic and his text are not in the same line!!!
         for (auto const & pSearchItem : maTextlist_Bottom)
         {
-            aCollectString.append(pSearchItem->sTopic).append("\n");
+            aCollectString.append(pSearchItem->sTopic + "\n");
         }
 
         m_xTopic_Bottom->setText ( aCollectString.makeStringAndClear() );
@@ -770,7 +770,7 @@ void ProgressMonitor::impl_rebuildFixedText ()
     // "\n" MUST BE at the end of line!!! => Else ... topic and his text are not in the same line!!!
     for (auto const & pSearchItem : maTextlist_Bottom)
     {
-        aCollectString.append(pSearchItem->sText).append("\n");
+        aCollectString.append(pSearchItem->sText + "\n");
     }
 
     m_xText_Bottom->setText ( aCollectString.makeStringAndClear() );
diff --git a/avmedia/source/viewer/mediawindow.cxx b/avmedia/source/viewer/mediawindow.cxx
index e823c2e8dac5..0807de0f5a45 100644
--- a/avmedia/source/viewer/mediawindow.cxx
+++ b/avmedia/source/viewer/mediawindow.cxx
@@ -225,7 +225,7 @@ bool MediaWindow::executeMediaURLDialog(weld::Window* pParent, OUString& rURL, b
             if( !aAllTypes.isEmpty() )
                 aAllTypes.append(aSeparator);
 
-            aAllTypes.append(aWildcard).append(aFilters[ i ].second.getToken( 0, ';', nIndex ));
+            aAllTypes.append(aWildcard + aFilters[ i ].second.getToken( 0, ';', nIndex ));
         }
     }
 
@@ -241,7 +241,7 @@ bool MediaWindow::executeMediaURLDialog(weld::Window* pParent, OUString& rURL, b
             if( !aTypes.isEmpty() )
                 aTypes.append(aSeparator);
 
-            aTypes.append(aWildcard).append(aFilters[ i ].second.getToken( 0, ';', nIndex ));
+            aTypes.append(aWildcard + aFilters[ i ].second.getToken( 0, ';', nIndex ));
         }
 
         // add single filters
diff --git a/basctl/source/basicide/baside2b.cxx b/basctl/source/basicide/baside2b.cxx
index cdc69b96b355..73cedfd04776 100644
--- a/basctl/source/basicide/baside2b.cxx
+++ b/basctl/source/basicide/baside2b.cxx
@@ -1885,7 +1885,7 @@ void StackWindow::UpdateCalls()
             OUStringBuffer aEntry( OUString::number(nScope ));
             if ( aEntry.getLength() < 2 )
                 aEntry.insert(0, " ");
-            aEntry.append(": ").append(pMethod->GetName());
+            aEntry.append(": " + pMethod->GetName());
             SbxArray* pParams = pMethod->GetParameters();
             SbxInfo* pInfo = pMethod->GetInfo();
             if ( pParams )
diff --git a/basic/source/runtime/methods.cxx b/basic/source/runtime/methods.cxx
index 0276a41c1b17..910b95f084fa 100644
--- a/basic/source/runtime/methods.cxx
+++ b/basic/source/runtime/methods.cxx
@@ -4643,7 +4643,7 @@ void SbRtl_Partition(StarBASIC *, SbxArray & rPar, bool)
             aRetStr.append(" ");
         }
     }
-    aRetStr.append( aLowerValue ).append(":");
+    aRetStr.append( aLowerValue + ":");
     if( nLen > nLen2 )
     {
         // appending the leading spaces for the uppervalue
diff --git a/chart2/source/tools/ExponentialRegressionCurveCalculator.cxx b/chart2/source/tools/ExponentialRegressionCurveCalculator.cxx
index 1aa962ab5e3e..1d389d6f99bf 100644
--- a/chart2/source/tools/ExponentialRegressionCurveCalculator.cxx
+++ b/chart2/source/tools/ExponentialRegressionCurveCalculator.cxx
@@ -183,13 +183,13 @@ OUString ExponentialRegressionCurveCalculator::ImplGetRepresentation(
         // if nValueLength not calculated then nullptr
     sal_Int32* pValueLength = nValueLength ? &nValueLength : nullptr;
     if ( m_fSign < 0.0 )
-        aTmpBuf.append( OUStringChar(aMinusSign) ).append( " " );
+        aTmpBuf.append( OUStringChar(aMinusSign) + " " );
     if ( bHasIntercept )
     {
         OUString aValueString = getFormattedString( xNumFormatter, nNumberFormatKey, fIntercept, pValueLength );
         if ( aValueString != "1" )  // aValueString may be rounded to 1 if nValueLength is small
         {
-            aTmpBuf.append( aValueString ).append( " " );
+            aTmpBuf.append( aValueString + " " );
             addStringToEquation( aBuf, nLineLength, aTmpBuf, pFormulaMaxWidth );
             aTmpBuf.truncate();
         }
@@ -208,16 +208,16 @@ OUString ExponentialRegressionCurveCalculator::ImplGetRepresentation(
         }
     }
     if ( m_fLogSlope < 0.0 )
-        aTmpBuf.append( OUStringChar(aMinusSign) ).append( " " );
+        aTmpBuf.append( OUStringChar(aMinusSign) + " " );
     if ( bHasLogSlope )
     {
         OUString aValueString = getFormattedString( xNumFormatter, nNumberFormatKey, fabs(m_fLogSlope), pValueLength );
         if ( aValueString != "1" )  // aValueString may be rounded to 1 if nValueLength is small
         {
-            aTmpBuf.append( aValueString ).append( " " );
+            aTmpBuf.append( aValueString + " " );
         }
     }
-    aTmpBuf.append( mXName ).append(" )");
+    aTmpBuf.append( mXName + " )");
     addStringToEquation( aBuf, nLineLength, aTmpBuf, pFormulaMaxWidth );
 
     return aBuf.makeStringAndClear();
diff --git a/chart2/source/tools/LogarithmicRegressionCurveCalculator.cxx b/chart2/source/tools/LogarithmicRegressionCurveCalculator.cxx
index c09eab50975c..bfa5d9e4be5d 100644
--- a/chart2/source/tools/LogarithmicRegressionCurveCalculator.cxx
+++ b/chart2/source/tools/LogarithmicRegressionCurveCalculator.cxx
@@ -156,17 +156,17 @@ OUString LogarithmicRegressionCurveCalculator::ImplGetRepresentation(
     {
         if( m_fSlope < 0.0 )
         {
-            aTmpBuf.append( OUStringChar(aMinusSign) ).append( " " );
+            aTmpBuf.append( OUStringChar(aMinusSign) + " " );
         }
         if( bHasSlope )
         {
             OUString aValueString = getFormattedString( xNumFormatter, nNumberFormatKey, fabs(m_fSlope), pValueLength );
             if ( aValueString != "1" )  // aValueString may be rounded to 1 if nValueLength is small
             {
-                aTmpBuf.append( aValueString ).append( " " );
+                aTmpBuf.append( aValueString + " " );
             }
         }
-        aTmpBuf.append( "ln(" ).append( mXName ).append( ") " );
+        aTmpBuf.append( "ln(" + mXName + ") " );
         addStringToEquation( aBuf, nLineLength, aTmpBuf, pFormulaMaxWidth );
         aTmpBuf.truncate();
 
@@ -175,7 +175,7 @@ OUString LogarithmicRegressionCurveCalculator::ImplGetRepresentation(
     }
              // add intercept value
     if( m_fIntercept < 0.0 )
-        aTmpBuf.append( OUStringChar(aMinusSign) ).append( " " );
+        aTmpBuf.append( OUStringChar(aMinusSign) + " " );
     OUString aValueString = getFormattedString( xNumFormatter, nNumberFormatKey, fabs(m_fIntercept), pValueLength );
     if ( aValueString != "0" )  // aValueString may be rounded to 0 if nValueLength is small
     {
diff --git a/chart2/source/tools/PolynomialRegressionCurveCalculator.cxx b/chart2/source/tools/PolynomialRegressionCurveCalculator.cxx
index b3585b71f5e3..38e326cbbbc4 100644
--- a/chart2/source/tools/PolynomialRegressionCurveCalculator.cxx
+++ b/chart2/source/tools/PolynomialRegressionCurveCalculator.cxx
@@ -345,7 +345,7 @@ OUString PolynomialRegressionCurveCalculator::ImplGetRepresentation(
         {
             if ( bFindValue ) // if it is not the first aValue
                 aTmpBuf.append( " " );
-            aTmpBuf.append( OUStringChar(aMinusSign) ).append(" ");
+            aTmpBuf.append( OUStringChar(aMinusSign) + " ");
             aValue = - aValue;
         }
         else
diff --git a/chart2/source/tools/PotentialRegressionCurveCalculator.cxx b/chart2/source/tools/PotentialRegressionCurveCalculator.cxx
index eb054bd8db66..89f6dc5b9e6e 100644
--- a/chart2/source/tools/PotentialRegressionCurveCalculator.cxx
+++ b/chart2/source/tools/PotentialRegressionCurveCalculator.cxx
@@ -170,18 +170,18 @@ OUString PotentialRegressionCurveCalculator::ImplGetRepresentation(
         // if nValueLength not calculated then nullptr
         sal_Int32* pValueLength = nValueLength ? &nValueLength : nullptr;
         if ( m_fIntercept < 0.0 )    // add intercept value
-             aTmpBuf.append( OUStringChar(aMinusSign) ).append( " " );
+             aTmpBuf.append( OUStringChar(aMinusSign) + " " );
         if( bHasIntercept )
         {
             OUString aValueString = getFormattedString( xNumFormatter, nNumberFormatKey, fabs(m_fIntercept), pValueLength );
             if ( aValueString != "1" )  // aValueString may be rounded to 1 if nValueLength is small
             {
-                aTmpBuf.append( aValueString ).append( " " );
+                aTmpBuf.append( aValueString + " " );
             }
         }
         if( m_fSlope != 0.0 )  // add slope value
         {
-            aTmpBuf.append( mXName ).append( "^" );
+            aTmpBuf.append( mXName + "^" );
             aTmpBuf.append( getFormattedString( xNumFormatter, nNumberFormatKey, m_fSlope, pValueLength ));
         }
         addStringToEquation( aBuf, nLineLength, aTmpBuf, pFormulaMaxWidth );
diff --git a/chart2/source/view/charttypes/VSeriesPlotter.cxx b/chart2/source/view/charttypes/VSeriesPlotter.cxx
index 39a97c618a47..fda17a91964b 100644
--- a/chart2/source/view/charttypes/VSeriesPlotter.cxx
+++ b/chart2/source/view/charttypes/VSeriesPlotter.cxx
@@ -1542,7 +1542,7 @@ void VSeriesPlotter::createRegressionCurveEquationShapes(
         }
         if( bShowCorrCoeff )
         {
-            aFormula.append( "R" ).append( OUStringChar( aSuperscriptFigures[2] ) ).append( " = " );
+            aFormula.append( "R" + OUStringChar( aSuperscriptFigures[2] )  + " = " );
             double fR( xRegressionCurveCalculator->getCorrelationCoefficient());
             if (m_apNumberFormatterWrapper)
             {
diff --git a/comphelper/source/misc/xmlsechelper.cxx b/comphelper/source/misc/xmlsechelper.cxx
index c01743b36615..8f7184d2abee 100644
--- a/comphelper/source/misc/xmlsechelper.cxx
+++ b/comphelper/source/misc/xmlsechelper.cxx
@@ -61,7 +61,7 @@ namespace comphelper::xmlsec
                 s2.append('\n');
             }
             s1.append(i->second);
-            s2.append(i->first).append(" = ").append(i->second);
+            s2.append(i->first + " = " + i->second);
         }
         return make_pair(s1.makeStringAndClear(), s2.makeStringAndClear());
     }
diff --git a/compilerplugins/clang/stringadd.cxx b/compilerplugins/clang/stringadd.cxx
index 5723b5bb6e3b..9c6d11fd55b1 100644
--- a/compilerplugins/clang/stringadd.cxx
+++ b/compilerplugins/clang/stringadd.cxx
@@ -72,6 +72,7 @@ public:
 
     bool VisitCompoundStmt(CompoundStmt const*);
     bool VisitCXXOperatorCallExpr(CXXOperatorCallExpr const*);
+    bool VisitCXXMemberCallExpr(CXXMemberCallExpr const*);
 
 private:
     enum class Summands
@@ -262,6 +263,63 @@ bool StringAdd::VisitCXXOperatorCallExpr(CXXOperatorCallExpr const* operatorCall
     return true;
 }
 
+bool StringAdd::VisitCXXMemberCallExpr(CXXMemberCallExpr const* methodCall)
+{
+    if (ignoreLocation(methodCall))
+        return true;
+
+    auto methodDecl = methodCall->getMethodDecl();
+    if (!methodDecl || !methodDecl->getIdentifier() || methodDecl->getName() != "append"
+        || methodCall->getNumArgs() == 0)
+        return true;
+    auto tc1 = loplugin::TypeCheck(methodCall->getType());
+    if (!tc1.Class("OUStringBuffer").Namespace("rtl").GlobalNamespace()
+        && !tc1.Class("OStringBuffer").Namespace("rtl").GlobalNamespace())
+        return true;
+    auto paramType = methodDecl->getParamDecl(0)->getType();
+    // if we convert one of the number append methods, we need to create an extra temporary to hold the string convertion of the number
+    if (paramType->isIntegerType())
+        return true;
+    if (paramType->isCharType())
+        return true;
+    if (paramType->isFloatingType())
+        return true;
+    auto arg = methodCall->getArg(0);
+    // I don't think the OUStringAppend functionality can handle this efficiently
+    if (isa<ConditionalOperator>(ignore(arg)))
+        return true;
+
+    auto methodCall2 = dyn_cast<CXXMemberCallExpr>(ignore(methodCall->getImplicitObjectArgument()));
+    if (!methodCall2)
+        return true;
+    auto tc = loplugin::TypeCheck(methodCall2->getType());
+    if (!tc.Class("OUStringBuffer").Namespace("rtl").GlobalNamespace()
+        && !tc.Class("OStringBuffer").Namespace("rtl").GlobalNamespace())
+        return true;
+    auto methodDecl2 = methodCall2->getMethodDecl();
+    if (!methodDecl2->getIdentifier() || methodDecl2->getName() != "append"
+        || methodCall2->getNumArgs() == 0)
+        return true;
+    auto paramType2 = methodDecl2->getParamDecl(0)->getType();
+    // if we convert one of the number append methods, we need to create an extra temporary to hold the string convertion of the number
+    if (paramType2->isIntegerType())
+        return true;
+    if (paramType2->isCharType())
+        return true;
+    if (paramType2->isFloatingType())
+        return true;
+    arg = methodCall2->getArg(0);
+    // I don't think the OUStringAppend functionality can handle this efficiently
+    if (isa<ConditionalOperator>(ignore(arg)))
+        return true;
+    report(DiagnosticsEngine::Warning,
+           "chained append, rather use single append call and + operator",
+           compat::getBeginLoc(methodCall2))
+        << methodCall2->getSourceRange();
+
+    return true;
+}
+
 Expr const* StringAdd::ignore(Expr const* expr)
 {
     return compat::IgnoreImplicit(compat::IgnoreImplicit(expr)->IgnoreParens());
diff --git a/compilerplugins/clang/stringview.cxx b/compilerplugins/clang/stringview.cxx
index 5df91dcad054..95d7d6368572 100644
--- a/compilerplugins/clang/stringview.cxx
+++ b/compilerplugins/clang/stringview.cxx
@@ -70,7 +70,7 @@ bool StringView::VisitCXXOperatorCallExpr(CXXOperatorCallExpr const* cxxOperator
         if (!memberCallExpr)
             return;
         auto methodDecl = memberCallExpr->getMethodDecl();
-        if (!methodDecl->getIdentifier() || methodDecl->getName() != "copy")
+        if (!methodDecl || !methodDecl->getIdentifier() || methodDecl->getName() != "copy")
             return;
         report(DiagnosticsEngine::Warning, "rather than copy, pass with a view using subView()",
                compat::getBeginLoc(expr))
diff --git a/compilerplugins/clang/test/stringadd.cxx b/compilerplugins/clang/test/stringadd.cxx
index a953e44062bb..a18b562a052f 100644
--- a/compilerplugins/clang/test/stringadd.cxx
+++ b/compilerplugins/clang/test/stringadd.cxx
@@ -217,6 +217,10 @@ void f1(OUString s, OUString t, int i, const char* pChar)
     // no warning expected
     OUString c;
     c = c + OUString(pChar, strlen(pChar), RTL_TEXTENCODING_UTF8);
+
+    OUStringBuffer buf;
+    // expected-error@+1 {{chained append, rather use single append call and + operator [loplugin:stringadd]}}
+    buf.append(" ").append(b);
 }
 void f2(char ch)
 {
diff --git a/connectivity/source/commontools/dbtools2.cxx b/connectivity/source/commontools/dbtools2.cxx
index 907bc7fd3698..9805f63afba4 100644
--- a/connectivity/source/commontools/dbtools2.cxx
+++ b/connectivity/source/commontools/dbtools2.cxx
@@ -261,8 +261,8 @@ namespace
         for(sal_Int32 i=0;i<nColCount;++i)
         {
             if ( (_xColumns->getByIndex(i) >>= xColProp) && xColProp.is() )
-                sSql.append( ::dbtools::quoteName(sQuote,::comphelper::getString(xColProp->getPropertyValue(rPropMap.getNameByIndex(PROPERTY_ID_NAME)))) )
-                        .append(",");
+                sSql.append( ::dbtools::quoteName(sQuote,::comphelper::getString(xColProp->getPropertyValue(rPropMap.getNameByIndex(PROPERTY_ID_NAME)))) +
+                            ",");
         }
 
         if ( nColCount )
diff --git a/connectivity/source/commontools/sqlerror.cxx b/connectivity/source/commontools/sqlerror.cxx
index dee6f36f0b61..9f8608384d1d 100644
--- a/connectivity/source/commontools/sqlerror.cxx
+++ b/connectivity/source/commontools/sqlerror.cxx
@@ -222,13 +222,9 @@ namespace connectivity
 
     OUString SQLError_Impl::impl_getErrorMessage( ErrorCondition _eCondition )
     {
-        OUStringBuffer aMessage;
-
         OUString sResMessage(Translate::get(lcl_getResourceErrorID(_eCondition), m_aResources));
         OSL_ENSURE( !sResMessage.isEmpty(), "SQLError_Impl::impl_getErrorMessage: illegal error condition, or invalid resource!" );
-        aMessage.append( getMessagePrefix() ).append( " " ).append( sResMessage );
-
-        return aMessage.makeStringAndClear();
+        return getMessagePrefix() + " " + sResMessage;
     }
 
     OUString SQLError_Impl::impl_getSQLState( ErrorCondition _eCondition )
diff --git a/connectivity/source/drivers/firebird/Util.cxx b/connectivity/source/drivers/firebird/Util.cxx
index 3bf3cfbc4d82..46b87d7caf12 100644
--- a/connectivity/source/drivers/firebird/Util.cxx
+++ b/connectivity/source/drivers/firebird/Util.cxx
@@ -51,7 +51,7 @@ OUString firebird::StatusVectorToString(const ISC_STATUS_ARRAY& rStatusVector,
     {
         SAL_WARN("connectivity.firebird", "ignore fb_interpret exception");
     }
-    buf.append("\ncaused by\n'").append(rCause).append("'\n");
+    buf.append(OUString::Concat("\ncaused by\n'") + rCause + "'\n");
 
     OUString error = buf.makeStringAndClear();
     SAL_WARN("connectivity.firebird", error);
diff --git a/connectivity/source/drivers/postgresql/pq_xkeys.cxx b/connectivity/source/drivers/postgresql/pq_xkeys.cxx
index 88d8b5b1189b..84507202fa9a 100644
--- a/connectivity/source/drivers/postgresql/pq_xkeys.cxx
+++ b/connectivity/source/drivers/postgresql/pq_xkeys.cxx
@@ -172,10 +172,9 @@ void Keys::refresh()
 
             if( css::sdbcx::KeyType::FOREIGN == keyType )
             {
-                OUStringBuffer buf( 128 );
-                buf.append( xRow->getString( 6 ) ).append( "." ).append( xRow->getString( 5 ) );
+                OUString buf = xRow->getString( 6 ) + "." + xRow->getString( 5 );
                 pKey->setPropertyValue_NoBroadcast_public(
-                    st.REFERENCED_TABLE, makeAny( buf.makeStringAndClear() ) );
+                    st.REFERENCED_TABLE, makeAny( buf ) );
 
                 Int2StringMap foreignMap;
                 fillAttnum2attnameMap( foreignMap, m_origin, xRow->getString(6), xRow->getString(5));
diff --git a/connectivity/source/drivers/postgresql/pq_xviews.cxx b/connectivity/source/drivers/postgresql/pq_xviews.cxx
index 3f36c168b6d2..d71219fa6420 100644
--- a/connectivity/source/drivers/postgresql/pq_xviews.cxx
+++ b/connectivity/source/drivers/postgresql/pq_xviews.cxx
@@ -149,7 +149,7 @@ void Views::appendByDescriptor(
 
     buf.append( "CREATE VIEW ");
     bufferQuoteQualifiedIdentifier( buf, schema, name, m_pSettings );
-    buf.append(" AS " ).append( command );
+    buf.append(" AS " + command );
 
     stmt->executeUpdate( buf.makeStringAndClear() );
 
diff --git a/cui/source/customize/cfg.cxx b/cui/source/customize/cfg.cxx
index fe1b68db85b9..3ab8e4288703 100644
--- a/cui/source/customize/cfg.cxx
+++ b/cui/source/customize/cfg.cxx
@@ -3075,7 +3075,7 @@ void SvxIconSelectorDialog::ImportGraphics(
           fPath = OUString::Concat(rPaths[0].subView(8)) + "/";
     for ( sal_Int32 i = 0; i < rejectedCount; ++i )
     {
-        message.append(fPath).append(rejected[i]).append("\n");
+        message.append(fPath + rejected[i] + "\n");
     }
 
     SvxIconChangeDialog aDialog(m_xDialog.get(), message.makeStringAndClear());
diff --git a/dbaccess/source/core/api/CacheSet.cxx b/dbaccess/source/core/api/CacheSet.cxx
index e6f31962834f..366a727be58d 100644
--- a/dbaccess/source/core/api/CacheSet.cxx
+++ b/dbaccess/source/core/api/CacheSet.cxx
@@ -160,7 +160,7 @@ void OCacheSet::insertRow( const ORowSetRow& _rInsertRow,const connectivity::OSQ
     connectivity::ORowVector< ORowSetValue > ::Vector::iterator aEnd = _rInsertRow->end();
     for(; aIter != aEnd;++aIter)
     {
-        aSql.append(::dbtools::quoteName( aQuote,m_xSetMetaData->getColumnName(i++)) ).append(",");
+        aSql.append(::dbtools::quoteName( aQuote,m_xSetMetaData->getColumnName(i++)) + ",");
         aValues.append("?,");
     }
 
@@ -261,7 +261,7 @@ void OCacheSet::fillParameters( const ORowSetRow& _rRow
         }
         if(aIter->isModified())
         {
-            _sParameter.append(::dbtools::quoteName( aQuote,aColumnName) ).append("?,");
+            _sParameter.append(::dbtools::quoteName( aQuote,aColumnName) + "?,");
         }
     }
 }
@@ -282,7 +282,7 @@ void OCacheSet::updateRow(const ORowSetRow& _rInsertRow ,const ORowSetRow& _rOri
     {
         aCondition.setLength(aCondition.getLength()-5);
 
-        aSql.append(" WHERE " ).append( aCondition.makeStringAndClear());
+        aSql.append(" WHERE " + aCondition.makeStringAndClear());
     }
     else
         ::dbtools::throwSQLException(
diff --git a/dbaccess/source/core/api/KeySet.cxx b/dbaccess/source/core/api/KeySet.cxx
index e61259bf61b1..8999ded1e3c7 100644
--- a/dbaccess/source/core/api/KeySet.cxx
+++ b/dbaccess/source/core/api/KeySet.cxx
@@ -220,11 +220,11 @@ namespace
             fullName = OUString::Concat(tblName) + "." + colName;
         if ( _rValue.isNull() )
         {
-            o_buf.append(fullName).append(" IS NULL ");
+            o_buf.append(fullName + " IS NULL ");
         }
         else
         {
-            o_buf.append(fullName).append(" = ? ");
+            o_buf.append(fullName + " = ? ");
         }
     }
 }
@@ -496,7 +496,7 @@ void OKeySet::updateRow(const ORowSetRow& _rInsertRow ,const ORowSetRow& _rOrigi
         }
         if((*_rInsertRow)[columnName.second.nPosition].isModified())
         {
-            aSql.append(::dbtools::quoteName( aQuote,columnName.second.sRealName)).append(aPara);
+            aSql.append(::dbtools::quoteName( aQuote,columnName.second.sRealName) + aPara);
         }
         ++i;
     }
@@ -513,7 +513,7 @@ void OKeySet::updateRow(const ORowSetRow& _rInsertRow ,const ORowSetRow& _rOrigi
         aSql.append(" WHERE ");
         if(!sKeyCondition.isEmpty() && !sIndexCondition.isEmpty())
         {
-            aSql.append(sKeyCondition.makeStringAndClear()).append(sIndexCondition.makeStringAndClear());
+            aSql.append(sKeyCondition.makeStringAndClear() + sIndexCondition.makeStringAndClear());
         }
         else if(!sKeyCondition.isEmpty())
         {
@@ -611,7 +611,7 @@ void OKeySet::insertRow( const ORowSetRow& _rInsertRow,const connectivity::OSQLT
             {
                 bRefetch = std::find(m_aFilterColumns.begin(),m_aFilterColumns.end(),columnName.second.sRealName) == m_aFilterColumns.end();
             }
-            aSql.append(::dbtools::quoteName( aQuote,columnName.second.sRealName)).append(",");
+            aSql.append(::dbtools::quoteName( aQuote,columnName.second.sRealName) + ",");
             aValues.append("?,");
             bModified = true;
         }
@@ -717,7 +717,7 @@ void OKeySet::executeInsert( const ORowSetRow& _rInsertRow,const OUString& i_sSQ
             SelectColumnsMetaData::const_iterator aFind = m_pKeyColumnNames->find(autoColumn);
             if ( aFind != aEnd )
             {
-                sMaxStmt.append(" MAX(").append(::dbtools::quoteName( sQuote,aFind->second.sRealName)).append("),");
+                sMaxStmt.append(" MAX(" + ::dbtools::quoteName( sQuote,aFind->second.sRealName) + "),");
             }
         }
 
diff --git a/dbaccess/source/core/api/OptimisticSet.cxx b/dbaccess/source/core/api/OptimisticSet.cxx
index 4cec7ed6839b..c214402f50c5 100644
--- a/dbaccess/source/core/api/OptimisticSet.cxx
+++ b/dbaccess/source/core/api/OptimisticSet.cxx
@@ -188,7 +188,7 @@ void OptimisticSet::updateRow(const ORowSetRow& _rInsertRow ,const ORowSetRow& _
             OUStringBuffer& rPart = aSql[columnName.second.sTableName];
             if ( !rPart.isEmpty() )
                 rPart.append(", ");
-            rPart.append(sQuotedColumnName).append(" = ?");
+            rPart.append(sQuotedColumnName + " = ?");
         }
     }
 
@@ -211,7 +211,7 @@ void OptimisticSet::updateRow(const ORowSetRow& _rInsertRow ,const ORowSetRow& _
                                        " SET " + elem.second.toString());
             OUStringBuffer& rCondition = aKeyConditions[elem.first];
             if ( !rCondition.isEmpty() )
-                sSql.append(" WHERE ").append( rCondition );
+                sSql.append(" WHERE " + rCondition );
 
             executeUpdate(_rInsertRow ,_rOriginalRow,sSql.makeStringAndClear(),elem.first);
         }
diff --git a/dbaccess/source/core/api/SingleSelectQueryComposer.cxx b/dbaccess/source/core/api/SingleSelectQueryComposer.cxx
index 879342932cc0..2284f1db3e3f 100644
--- a/dbaccess/source/core/api/SingleSelectQueryComposer.cxx
+++ b/dbaccess/source/core/api/SingleSelectQueryComposer.cxx
@@ -174,28 +174,28 @@ namespace
         switch( i_nFilterOperator )
         {
             case SQLFilterOperator::EQUAL:
-                o_sRet.append(" = " ).append( i_sValue);
+                o_sRet.append(OUString::Concat(" = ") + i_sValue);
                 break;
             case SQLFilterOperator::NOT_EQUAL:
-                o_sRet.append(" <> " ).append( i_sValue);
+                o_sRet.append(OUString::Concat(" <> ") + i_sValue);
                 break;
             case SQLFilterOperator::LESS:
-                o_sRet.append(" < " ).append( i_sValue);
+                o_sRet.append(OUString::Concat(" < ") + i_sValue);
                 break;
             case SQLFilterOperator::GREATER:
-                o_sRet.append(" > " ).append( i_sValue);
+                o_sRet.append(OUString::Concat(" > ") + i_sValue);
                 break;
             case SQLFilterOperator::LESS_EQUAL:
-                o_sRet.append(" <= " ).append( i_sValue);
+                o_sRet.append(OUString::Concat(" <= ") + i_sValue);
                 break;
             case SQLFilterOperator::GREATER_EQUAL:
-                o_sRet.append(" >= " ).append( i_sValue);
+                o_sRet.append(OUString::Concat(" >= ") + i_sValue);
                 break;
             case SQLFilterOperator::LIKE:
-                o_sRet.append(" LIKE " ).append( i_sValue);
+                o_sRet.append(OUString::Concat(" LIKE ") + i_sValue);
                 break;
             case SQLFilterOperator::NOT_LIKE:
-                o_sRet.append(" NOT LIKE " ).append( i_sValue);
+                o_sRet.append(OUString::Concat(" NOT LIKE ") + i_sValue);
                 break;
             case SQLFilterOperator::SQLNULL:
                 o_sRet.append(" IS NULL");
@@ -759,7 +759,7 @@ Reference< XNameAccess > SAL_CALL OSingleSelectQueryComposer::getColumns(  )
         OUString sOriginalWhereClause = getSQLPart( Where, m_aSqlIterator, false );
         if ( !sOriginalWhereClause.isEmpty() )
         {
-            aSQL.append( " AND ( " ).append( sOriginalWhereClause ).append( " ) " );
+            aSQL.append( " AND ( " + sOriginalWhereClause + " ) " );
         }
 
         OUString sGroupBy = getSQLPart( Group, m_aSqlIterator, true );
@@ -1665,7 +1665,7 @@ void OSingleSelectQueryComposer::setConditionByColumn( const Reference< XPropert
                         const ::sal_Int64 nLength = xClob->length();
                         if ( sal_Int64(nLength + aSQL.getLength() + STR_LIKE.getLength() ) < sal_Int64(SAL_MAX_INT32) )
                         {
-                            aSQL.append("'").append(xClob->getSubString(1,static_cast<sal_Int32>(nLength))).append("'");
+                            aSQL.append("'" + xClob->getSubString(1,static_cast<sal_Int32>(nLength)) + "'");
                         }
                     }
                     else
diff --git a/dbaccess/source/core/dataaccess/ContentHelper.cxx b/dbaccess/source/core/dataaccess/ContentHelper.cxx
index e237d8ea3b88..94cb7168d037 100644
--- a/dbaccess/source/core/dataaccess/ContentHelper.cxx
+++ b/dbaccess/source/core/dataaccess/ContentHelper.cxx
@@ -123,7 +123,7 @@ OUString OContentHelper::impl_getHierarchicalName( bool _includingRootContainer
             xProp->getPropertyValue( PROPERTY_NAME ) >>= sName;
 
             OUString sPrevious = aHierarchicalName.makeStringAndClear();
-            aHierarchicalName.append( sName ).append( "/" ).append( sPrevious );
+            aHierarchicalName.append( sName + "/" + sPrevious );
         }
     }
     OUString sHierarchicalName( aHierarchicalName.makeStringAndClear() );
diff --git a/dbaccess/source/filter/xml/xmlServerDatabase.cxx b/dbaccess/source/filter/xml/xmlServerDatabase.cxx
index 590db077437b..654a9f403402 100644
--- a/dbaccess/source/filter/xml/xmlServerDatabase.cxx
+++ b/dbaccess/source/filter/xml/xmlServerDatabase.cxx
@@ -74,46 +74,46 @@ OXMLServerDatabase::OXMLServerDatabase( ODBFilter& rImport,
     OUStringBuffer sURL;
     if  ( sType == "sdbc:mysql:jdbc" || sType == "sdbc:mysqlc" || sType == "sdbc:mysql:mysqlc" )
     {
-        sURL.append( sType ).append( ":" ).append(sHostName);
+        sURL.append( sType + ":" + sHostName);
         if ( !sPortNumber.isEmpty() )
         {
-            sURL.append(":").append(sPortNumber);
+            sURL.append(":" + sPortNumber);
         }
         if ( !sDatabaseName.isEmpty() )
         {
-            sURL.append("/").append(sDatabaseName);
+            sURL.append("/" + sDatabaseName);
         }
     }
     else if ( sType == "jdbc:oracle:thin" )
     {
-        sURL.append("jdbc:oracle:thin:@").append(sHostName);
+        sURL.append("jdbc:oracle:thin:@" + sHostName);
         if ( !sPortNumber.isEmpty() )
         {
-            sURL.append(":").append(sPortNumber);
+            sURL.append(":" + sPortNumber);
         }
         if ( !sDatabaseName.isEmpty() )
         {
-            sURL.append(":").append(sDatabaseName);
+            sURL.append(":" + sDatabaseName);
         }
     }
     else if ( sType == "sdbc:address:ldap" )
     {
-        sURL.append("sdbc:address:ldap:").append(sHostName);
+        sURL.append("sdbc:address:ldap:" + sHostName);
         if ( !sPortNumber.isEmpty() )
         {
-            sURL.append(":").append(sPortNumber);
+            sURL.append(":" + sPortNumber);
         }
     }
     else
     {
-        sURL.append(sType).append(":").append(sHostName);
+        sURL.append(sType + ":" + sHostName);
         if ( !sPortNumber.isEmpty() )
         {
-            sURL.append(":").append(sPortNumber);
+            sURL.append(":" + sPortNumber);
         }
         if ( !sDatabaseName.isEmpty() )
         {
-            sURL.append(":").append(sDatabaseName);
+            sURL.append(":" + sDatabaseName);
         }
     }
     try
diff --git a/dbaccess/source/ui/dlg/directsql.cxx b/dbaccess/source/ui/dlg/directsql.cxx
index fc8191707c44..ac3425999cf9 100644
--- a/dbaccess/source/ui/dlg/directsql.cxx
+++ b/dbaccess/source/ui/dlg/directsql.cxx
@@ -258,7 +258,7 @@ namespace dbaui
                 for (;;)
                 {
                     // be dumb, treat everything as a string
-                    out.append(xRow->getString(i)).append(",");
+                    out.append(xRow->getString(i) + ",");
                     i++;
                 }
             }
diff --git a/dbaccess/source/ui/dlg/tablespage.cxx b/dbaccess/source/ui/dlg/tablespage.cxx
index 8162126a3749..91456123ec58 100644
--- a/dbaccess/source/ui/dlg/tablespage.cxx
+++ b/dbaccess/source/ui/dlg/tablespage.cxx
@@ -381,7 +381,7 @@ namespace dbaui
                                 bCatalogWildcard = m_xTablesList->isWildcardChecked(*xCatalog);
                                 if (m_bCatalogAtStart)
                                 {
-                                    sComposedName.append(m_xTablesList->GetWidget().get_text(*xCatalog)).append(m_sCatalogSeparator);
+                                    sComposedName.append(m_xTablesList->GetWidget().get_text(*xCatalog) + m_sCatalogSeparator);
                                     if (bCatalogWildcard)
                                         sComposedName.append(sWildcard);
                                 }
@@ -396,7 +396,7 @@ namespace dbaui
                             }
                         }
                         bSchemaWildcard = m_xTablesList->isWildcardChecked(*xSchema);
-                        sComposedName.append(m_xTablesList->GetWidget().get_text(*xSchema)).append(".");
+                        sComposedName.append(m_xTablesList->GetWidget().get_text(*xSchema) + ".");
                     }
 
                     if (bSchemaWildcard)
diff --git a/dbaccess/source/ui/misc/WCopyTable.cxx b/dbaccess/source/ui/misc/WCopyTable.cxx
index 4420b83bf428..05d6181ca881 100644
--- a/dbaccess/source/ui/misc/WCopyTable.cxx
+++ b/dbaccess/source/ui/misc/WCopyTable.cxx
@@ -230,7 +230,7 @@ OUString ObjectCopySource::getSelectStatement() const
                 aSQL.append( ", " );
         }
 
-        aSQL.append( "FROM " ).append( ::dbtools::composeTableNameForSelect( m_xConnection, m_xObject ) );
+        aSQL.append( "FROM " + ::dbtools::composeTableNameForSelect( m_xConnection, m_xObject ) );
 
         sSelectStatement = aSQL.makeStringAndClear();
     }
diff --git a/dbaccess/source/ui/uno/copytablewizard.cxx b/dbaccess/source/ui/uno/copytablewizard.cxx
index 50fa22f6dad4..12e3575dbafd 100644
--- a/dbaccess/source/ui/uno/copytablewizard.cxx
+++ b/dbaccess/source/ui/uno/copytablewizard.cxx
@@ -1448,7 +1448,7 @@ OUString CopyTableWizard::impl_getServerSideCopyStatement_throw(const Reference<
         {
             if ( !sColumns.isEmpty() )
                 sColumns.append(",");
-            sColumns.append(sQuote).append(aDestColumnNames[rColumnPositionPair.second - 1]).append(sQuote);
+            sColumns.append(sQuote + aDestColumnNames[rColumnPositionPair.second - 1] + sQuote);
         }
     }
     const OUString sComposedTableName = ::dbtools::composeTableName( xDestMetaData, _xTable, ::dbtools::EComposeRule::InDataManipulation, true );
diff --git a/desktop/source/deployment/registry/component/dp_component.cxx b/desktop/source/deployment/registry/component/dp_component.cxx
index 5bf230c17f68..ac859a3d946f 100644
--- a/desktop/source/deployment/registry/component/dp_component.cxx
+++ b/desktop/source/deployment/registry/component/dp_component.cxx
@@ -1090,7 +1090,7 @@ Reference<XComponentContext> raise_uno_process(
     catch (...) {
         OUStringBuffer sMsg = "error starting process: " + url;
         for(const auto& arg : args)
-            sMsg.append(" ").append(arg);
+            sMsg.append(" " + arg);
         throw uno::RuntimeException(sMsg.makeStringAndClear());
     }
     try {
diff --git a/extensions/source/propctrlr/selectlabeldialog.cxx b/extensions/source/propctrlr/selectlabeldialog.cxx
index 9cefcb72b273..1987de8d85c5 100644
--- a/extensions/source/propctrlr/selectlabeldialog.cxx
+++ b/extensions/source/propctrlr/selectlabeldialog.cxx
@@ -205,10 +205,9 @@ namespace pcr
             if (!::comphelper::hasProperty(PROPERTY_LABEL, xAsSet))
                 continue;
 
-            OUString sDisplayName = OUStringBuffer(
-                ::comphelper::getString(xAsSet->getPropertyValue(PROPERTY_LABEL))).
-                append(" (").append(sName).append(')').
-                makeStringAndClear();
+            OUString sDisplayName =
+                ::comphelper::getString(xAsSet->getPropertyValue(PROPERTY_LABEL)) +
+                " (" + sName + ")";
 
             // all requirements met -> insert
             m_xUserData.emplace_back(new Reference<XPropertySet>(xAsSet));
diff --git a/filter/source/config/cache/filtercache.cxx b/filter/source/config/cache/filtercache.cxx
index b3ac1594fade..c97d39f2319b 100644
--- a/filter/source/config/cache/filtercache.cxx
+++ b/filter/source/config/cache/filtercache.cxx
@@ -995,13 +995,13 @@ void FilterCache::impl_validateAndOptimize()
         aType[PROPNAME_NAME] >>= sInternalTypeNameCheck;
         if (sInternalTypeNameCheck != sType)
         {
-            sLog.append("Warning\t:\t" "The type \"").append(sType).append("\" does support the property \"Name\" correctly.\n");
+            sLog.append("Warning\t:\t" "The type \"" + sType + "\" does support the property \"Name\" correctly.\n");
             ++nWarnings;
         }
 
         if (!ce && !cu)
         {
-            sLog.append("Warning\t:\t" "The type \"").append(sType).append("\" does not contain any URL pattern nor any extensions.\n");
+            sLog.append("Warning\t:\t" "The type \"" + sType + "\" does not contain any URL pattern nor any extensions.\n");
             ++nWarnings;
         }
 #endif
@@ -1077,7 +1077,7 @@ void FilterCache::impl_validateAndOptimize()
                 (!bReferencedByHandler)
                )
             {
-                sLog.append("Warning\t:\t" "The type \"").append(sType).append("\" is not used by any filter, loader or content handler.\n");
+                sLog.append("Warning\t:\t" "The type \"" + sType + "\" is not used by any filter, loader or content handler.\n");
                 ++nWarnings;
             }
         }
@@ -1098,7 +1098,7 @@ void FilterCache::impl_validateAndOptimize()
                     sLog.append("warning\t:\t");
                 }
 
-                sLog.append("The type \"").append(sType).append("\" points to an invalid filter \"").append(sPrefFilter).append("\".\n");
+                sLog.append("The type \"" + sType + "\" points to an invalid filter \"" + sPrefFilter + "\".\n");
                 continue;
             }
 
@@ -1107,10 +1107,10 @@ void FilterCache::impl_validateAndOptimize()
             aPrefFilter[PROPNAME_TYPE] >>= sFilterTypeReg;
             if (sFilterTypeReg != sType)
             {
-                sLog.append("error\t:\t" "The preferred filter \"")
-                    .append(sPrefFilter).append("\" of type \"").append(sType)
-                    .append("\" is registered for another type \"").append(sFilterTypeReg)
-                    .append("\".\n");
+                sLog.append("error\t:\t" "The preferred filter \"" +
+                        sPrefFilter + "\" of type \"" + sType +
+                        "\" is registered for another type \"" + sFilterTypeReg +
+                        "\".\n");
                 ++nErrors;
             }
 
@@ -1118,8 +1118,8 @@ void FilterCache::impl_validateAndOptimize()
             aPrefFilter[PROPNAME_FLAGS] >>= nFlags;
             if (!(static_cast<SfxFilterFlags>(nFlags) & SfxFilterFlags::IMPORT))
             {
-                sLog.append("error\t:\t" "The preferred filter \"").append(sPrefFilter).append("\" of type \"")
-                            .append(sType).append("\" is not an IMPORT filter!\n");
+                sLog.append("error\t:\t" "The preferred filter \"" + sPrefFilter + "\" of type \"" +
+                                sType + "\" is not an IMPORT filter!\n");
                 ++nErrors;
             }
 
@@ -1127,8 +1127,8 @@ void FilterCache::impl_validateAndOptimize()
             aPrefFilter[PROPNAME_NAME] >>= sInternalFilterNameCheck;
             if (sInternalFilterNameCheck !=  sPrefFilter)
             {
-                sLog.append("Warning\t:\t" "The filter \"").append(sPrefFilter)
-                            .append("\" does support the property \"Name\" correctly.\n");
+                sLog.append("Warning\t:\t" "The filter \"" + sPrefFilter +
+                                "\" does support the property \"Name\" correctly.\n");
                 ++nWarnings;
             }
         }
diff --git a/forms/source/xforms/model_ui.cxx b/forms/source/xforms/model_ui.cxx
index 8591186b4bbb..4592fa3efe97 100644
--- a/forms/source/xforms/model_ui.cxx
+++ b/forms/source/xforms/model_ui.cxx
@@ -287,7 +287,7 @@ OUString Model::getNodeDisplayName( const css::uno::Reference<css::xml::dom::XNo
             OUString sContent = xNode->getNodeValue();
             if( bDetail || ! lcl_isWhitespace( sContent ) )
             {
-                aBuffer.append("\"").append(Convert::collapseWhitespace( sContent )).append("\"");
+                aBuffer.append("\"" + Convert::collapseWhitespace( sContent ) + "\"");
             }
         }
         break;
diff --git a/framework/source/accelerators/storageholder.cxx b/framework/source/accelerators/storageholder.cxx
index 4c7702e579ca..e8a26845f489 100644
--- a/framework/source/accelerators/storageholder.cxx
+++ b/framework/source/accelerators/storageholder.cxx
@@ -345,7 +345,7 @@ css::uno::Reference< css::embed::XStorage > StorageHolder::getParentStorage(cons
         sal_Int32       i = 0;
         for (i = 0; i < c - 1; ++i)
         {
-            sParentPath.append(lFolders[i]).append(PATH_SEPARATOR);
+            sParentPath.append(lFolders[i] + PATH_SEPARATOR);
         }
 
         auto pParent = m_lStorages.find(sParentPath.makeStringAndClear());
diff --git a/i18nlangtag/source/languagetag/languagetag.cxx b/i18nlangtag/source/languagetag/languagetag.cxx
index acdb3374b6ff..41f23973020f 100644
--- a/i18nlangtag/source/languagetag/languagetag.cxx
+++ b/i18nlangtag/source/languagetag/languagetag.cxx
@@ -1115,11 +1115,11 @@ bool LanguageTagImpl::canonicalize()
                                 1 + aCountry.getLength() + 1 + aVariants.getLength());
                         aBuf.append( aLanguage);
                         if (!aScript.isEmpty())
-                            aBuf.append("-").append(aScript);
+                            aBuf.append("-" + aScript);
                         if (!aCountry.isEmpty())
-                            aBuf.append("-").append(aCountry);
+                            aBuf.append("-" + aCountry);
                         if (!aVariants.isEmpty())
-                            aBuf.append("-").append(aVariants);
+                            aBuf.append("-" + aVariants);
                         OUString aStr( aBuf.makeStringAndClear());
 
                         if (maBcp47 != aStr)
diff --git a/i18npool/source/collator/collator_unicode.cxx b/i18npool/source/collator/collator_unicode.cxx
index 8c8255a18229..2cff45a6d68d 100644
--- a/i18npool/source/collator/collator_unicode.cxx
+++ b/i18npool/source/collator/collator_unicode.cxx
@@ -160,10 +160,10 @@ Collator_Unicode::loadCollatorAlgorithm(const OUString& rAlgorithm, const lang::
 #ifdef SAL_DLLPREFIX
             aBuf.append(SAL_DLLPREFIX);
 #endif
-            aBuf.append( "collator_data" ).append( SAL_DLLEXTENSION );
+            aBuf.append( "collator_data" SAL_DLLEXTENSION );
             hModule = osl_loadModuleRelative( &thisModule, aBuf.makeStringAndClear().pData, SAL_LOADMODULE_DEFAULT );
             if (hModule) {
-                aBuf.append("get_").append(rLocale.Language).append("_");
+                aBuf.append("get_" + rLocale.Language + "_");
                 if ( rLocale.Language == "zh" ) {
                     OUString func_base = aBuf.makeStringAndClear();
                     if (OUString("TW HK MO").indexOf(rLocale.Country) >= 0)
diff --git a/lotuswordpro/source/filter/lwptblformula.cxx b/lotuswordpro/source/filter/lwptblformula.cxx
index 6c9f29f722af..301b414e1b4d 100644
--- a/lotuswordpro/source/filter/lwptblformula.cxx
+++ b/lotuswordpro/source/filter/lwptblformula.cxx
@@ -428,7 +428,7 @@ OUString LwpFormulaFunc::ToString(LwpTableLayout* pCellsMap)
     //Append args
     for (auto const& elem : m_aArgs)
     {
-        aFormula.append(elem->ToArgString(pCellsMap)).append("|"); //separator
+        aFormula.append(elem->ToArgString(pCellsMap) + "|"); //separator
     }
 
     //erase the last "|"
diff --git a/oox/source/core/xmlfilterbase.cxx b/oox/source/core/xmlfilterbase.cxx
index bb63873f5540..b46392d1a246 100644
--- a/oox/source/core/xmlfilterbase.cxx
+++ b/oox/source/core/xmlfilterbase.cxx
@@ -602,7 +602,7 @@ writeElement( const FSHelperPtr& pDoc, sal_Int32 nXmlElement, const Sequence< OU
 
     for( const OUString& rItem : aItems )
     {
-        sRep.append( " " ).append( rItem );
+        sRep.append( " " + rItem );
     }
 
     writeElement( pDoc, nXmlElement, sRep.makeStringAndClear() );
diff --git a/oox/source/dump/dumperbase.cxx b/oox/source/dump/dumperbase.cxx
index b73c24accef0..1638d51a6964 100644
--- a/oox/source/dump/dumperbase.cxx
+++ b/oox/source/dump/dumperbase.cxx
@@ -2409,7 +2409,7 @@ void XmlStreamObject::implDumpText( TextInputStream& rTextStrm )
                 matching end element on the same line in the next iteration. */
             if( bStartElem )
             {
-                aOldStartElem.append( aElem ).append( aText );
+                aOldStartElem.append( aElem + aText );
             }
             else
             {
diff --git a/oox/source/export/drawingml.cxx b/oox/source/export/drawingml.cxx
index c6c81a9bec3c..dfb81a27e713 100644
--- a/oox/source/export/drawingml.cxx
+++ b/oox/source/export/drawingml.cxx
@@ -4735,8 +4735,7 @@ OString DrawingML::WriteWdpPicture( const OUString& rFileId, const Sequence< sal
     OUString sFileName = "media/hdphoto" + OUString::number( mnWdpImageCounter++ ) + ".wdp";
     Reference< XOutputStream > xOutStream = mpFB->openFragmentStream( OUStringBuffer()
                                                                       .appendAscii( GetComponentDir() )
-                                                                      .append( "/" )
-                                                                      .append( sFileName )
+                                                                      .append( "/" + sFileName )
                                                                       .makeStringAndClear(),
                                                                       "image/vnd.ms-photo" );
     OUString sId;
diff --git a/oox/source/export/vmlexport.cxx b/oox/source/export/vmlexport.cxx
index 36d35a7ed18b..0506041e67d5 100644
--- a/oox/source/export/vmlexport.cxx
+++ b/oox/source/export/vmlexport.cxx
@@ -1120,15 +1120,9 @@ void VMLExport::AddLineDimensions( const tools::Rectangle& rRectangle )
         aBottom = OString::number( rRectangle.Bottom() );
     }
 
-    m_pShapeAttrList->add( XML_from,
-            OStringBuffer( 20 ).append( aLeft )
-            .append( "," ).append( aTop )
-            .makeStringAndClear() );
-
-    m_pShapeAttrList->add( XML_to,
-            OStringBuffer( 20 ).append( aRight )
-            .append( "," ).append( aBottom )
-            .makeStringAndClear() );
+    m_pShapeAttrList->add( XML_from, aLeft + "," + aTop );
+
+    m_pShapeAttrList->add( XML_to, aRight + "," + aBottom );
 }
 
 void VMLExport::AddRectangleDimensions( OStringBuffer& rBuffer, const tools::Rectangle& rRectangle, bool rbAbsolutePos)
diff --git a/oox/source/ole/vbamodule.cxx b/oox/source/ole/vbamodule.cxx
index 47c676cdc086..ade0bd97aeae 100644
--- a/oox/source/ole/vbamodule.cxx
+++ b/oox/source/ole/vbamodule.cxx
@@ -301,8 +301,7 @@ void VbaModule::createModule( std::u16string_view rVBASourceCode,
     else
     {
         // add a subroutine named after the module itself
-        aSourceCode.append( "Sub " ).
-            append( maName.replace( ' ', '_' ) ).append( '\n' );
+        aSourceCode.append( "Sub " + maName.replace( ' ', '_' ) + "\n" );
     }
 
     // append passed VBA source code
diff --git a/reportdesign/source/filter/xml/xmlControlProperty.cxx b/reportdesign/source/filter/xml/xmlControlProperty.cxx
index 1bc323d466c1..4cebfa18a7ea 100644
--- a/reportdesign/source/filter/xml/xmlControlProperty.cxx
+++ b/reportdesign/source/filter/xml/xmlControlProperty.cxx
@@ -188,9 +188,9 @@ Any OXMLControlProperty::convertString(const css::uno::Type& _rExpectedType, con
             bool bSuccess =
                 ::sax::Converter::convertBool(bValue, _rReadCharacters);
             OSL_ENSURE(bSuccess,
-                    OStringBuffer("OXMLControlProperty::convertString: could not convert \"").
-                append(OUStringToOString(_rReadCharacters, RTL_TEXTENCODING_ASCII_US)).
-                append("\" into a boolean!").getStr());
+                    OStringBuffer("OXMLControlProperty::convertString: could not convert \"" +
+                    OUStringToOString(_rReadCharacters, RTL_TEXTENCODING_ASCII_US) +
+                    "\" into a boolean!").getStr());
             aReturn <<= bValue;
         }
         break;
@@ -201,9 +201,9 @@ Any OXMLControlProperty::convertString(const css::uno::Type& _rExpectedType, con
                 bool bSuccess =
                     ::sax::Converter::convertNumber(nValue, _rReadCharacters);
                 OSL_ENSURE(bSuccess,
-                        OStringBuffer("OXMLControlProperty::convertString: could not convert \"").
-                    append(OUStringToOString(_rReadCharacters, RTL_TEXTENCODING_ASCII_US)).
-                    append("\" into an integer!").getStr());
+                        OStringBuffer("OXMLControlProperty::convertString: could not convert \"" +
+                        OUStringToOString(_rReadCharacters, RTL_TEXTENCODING_ASCII_US) +
+                        "\" into an integer!").getStr());
                 if (TypeClass_SHORT == _rExpectedType.getTypeClass())
                     aReturn <<= static_cast<sal_Int16>(nValue);
                 else
@@ -221,9 +221,9 @@ Any OXMLControlProperty::convertString(const css::uno::Type& _rExpectedType, con
             bool bSuccess =
                 ::sax::Converter::convertDouble(nValue, _rReadCharacters);
             OSL_ENSURE(bSuccess,
-                    OStringBuffer("OXMLControlProperty::convertString: could not convert \"").
-                append(OUStringToOString(_rReadCharacters, RTL_TEXTENCODING_ASCII_US)).
-                append("\" into a double!").getStr());
+                    OStringBuffer("OXMLControlProperty::convertString: could not convert \"" +
+                    OUStringToOString(_rReadCharacters, RTL_TEXTENCODING_ASCII_US) +
+                    "\" into a double!").getStr());
             aReturn <<= nValue;
         }
         break;
@@ -250,9 +250,9 @@ Any OXMLControlProperty::convertString(const css::uno::Type& _rExpectedType, con
                     bool bSuccess =
                         ::sax::Converter::convertDouble(nValue, _rReadCharacters);
                     OSL_ENSURE(bSuccess,
-                            OStringBuffer("OPropertyImport::convertString: could not convert \"").
-                        append(OUStringToOString(_rReadCharacters, RTL_TEXTENCODING_ASCII_US)).
-                        append("\" into a double!").getStr());
+                            OStringBuffer("OPropertyImport::convertString: could not convert \"" +
+                            OUStringToOString(_rReadCharacters, RTL_TEXTENCODING_ASCII_US) +
+                            "\" into a double!").getStr());
 
                     // then convert it into the target type
                     switch (nType)
diff --git a/sc/source/core/data/postit.cxx b/sc/source/core/data/postit.cxx
index 84633a640de8..882cc8c190bb 100644
--- a/sc/source/core/data/postit.cxx
+++ b/sc/source/core/data/postit.cxx
@@ -1169,7 +1169,7 @@ ScCaptionPtr ScNoteUtil::CreateTempCaption(
     if( pNote && !pNote->IsCaptionShown() )
     {
         if( !aBuffer.isEmpty() )
-            aBuffer.append( "\n--------\n" ).append( pNote->GetText() );
+            aBuffer.append( "\n--------\n" + pNote->GetText() );
         pNoteCaption = pNote->GetOrCreateCaption( rPos );
     }
 
diff --git a/sc/source/core/tool/address.cxx b/sc/source/core/tool/address.cxx
index 06ffd08c7d44..283f45ee8d0a 100644
--- a/sc/source/core/tool/address.cxx
+++ b/sc/source/core/tool/address.cxx
@@ -2185,7 +2185,7 @@ static void lcl_ScRange_Format_XL_Header( OUStringBuffer& rString, const ScRange
         default:
             if (!aDocName.isEmpty())
             {
-                rString.append("[").append(aDocName).append("]");
+                rString.append("[" + aDocName + "]");
             }
             rString.append(aTabName);
         break;
diff --git a/sc/source/core/tool/chgtrack.cxx b/sc/source/core/tool/chgtrack.cxx
index 7abcc01864ac..ebe614ed7b81 100644
--- a/sc/source/core/tool/chgtrack.cxx
+++ b/sc/source/core/tool/chgtrack.cxx
@@ -426,20 +426,15 @@ void ScChangeAction::GetDescription(
     // not properly restored in formulas. See specification at
     // http://specs.openoffice.org/calc/ease-of-use/redlining_comment.sxw
 
-    OUStringBuffer aBuf(rStr); // Take the original string.
     if (GetType() == SC_CAT_MOVE)
     {
-        aBuf.append(
-            ScResId(STR_CHANGED_MOVE_REJECTION_WARNING)).append(" ");
-        rStr = aBuf.makeStringAndClear();
+        rStr += ScResId(STR_CHANGED_MOVE_REJECTION_WARNING) + " ";
         return;
     }
 
     if (IsInsertType())
     {
-        aBuf.append(
-            ScResId(STR_CHANGED_DELETE_REJECTION_WARNING)).append(" ");
-        rStr = aBuf.makeStringAndClear();
+        rStr += ScResId(STR_CHANGED_DELETE_REJECTION_WARNING) + " ";
         return;
     }
 
@@ -454,19 +449,13 @@ void ScChangeAction::GetDescription(
 
     if (pReject->GetType() == SC_CAT_MOVE)
     {
-        aBuf.append(
-            ScResId(STR_CHANGED_MOVE_REJECTION_WARNING));
-        aBuf.append(' ');
-        rStr = aBuf.makeStringAndClear();
+        rStr += ScResId(STR_CHANGED_MOVE_REJECTION_WARNING) + " ";
         return;
     }
 
     if (pReject->IsDeleteType())
     {
-        aBuf.append(
-            ScResId(STR_CHANGED_DELETE_REJECTION_WARNING));
-        aBuf.append(' ');
-        rStr = aBuf.makeStringAndClear();
+        rStr += ScResId(STR_CHANGED_DELETE_REJECTION_WARNING) + " ";
         return;
     }
 
@@ -482,15 +471,9 @@ void ScChangeAction::GetDescription(
         return;
 
     if( itChangeAction->second->GetType() == SC_CAT_MOVE)
-        aBuf.append(
-            ScResId(STR_CHANGED_MOVE_REJECTION_WARNING));
+        rStr += ScResId(STR_CHANGED_MOVE_REJECTION_WARNING) + " ";
     else
-        aBuf.append(
-            ScResId(STR_CHANGED_DELETE_REJECTION_WARNING));
-
-    aBuf.append(' ');
-    rStr = aBuf.makeStringAndClear();
-    return;
+        rStr += ScResId(STR_CHANGED_DELETE_REJECTION_WARNING) + " ";
 }
 
 OUString ScChangeAction::GetRefString(
@@ -707,15 +690,13 @@ void ScChangeActionIns::GetDescription(
         return;
 
     // Construct a range string to replace '#1' first.
-    OUStringBuffer aBuf(ScResId(pWhatId));
-    aBuf.append(' ');
-    aBuf.append(GetRefString(GetBigRange(), rDoc));
-    OUString aRangeStr = aBuf.makeStringAndClear();
+    OUString aRangeStr = ScResId(pWhatId) +
+        " " +
+        GetRefString(GetBigRange(), rDoc);
 
     aRsc = aRsc.replaceAt(nPos, 2, aRangeStr); // replace '#1' with the range string.
 
-    aBuf.append(rStr).append(aRsc);
-    rStr = aBuf.makeStringAndClear();
+    rStr += aRsc;
 }
 
 bool ScChangeActionIns::IsEndOfList() const
@@ -955,15 +936,11 @@ void ScChangeActionDel::GetDescription(
         return;
 
     // Build a string to replace with.
-    OUStringBuffer aBuf;
-    aBuf.append(ScResId(pWhatId));
-    aBuf.append(' ');
-    aBuf.append(GetRefString(aTmpRange, rDoc));
-    OUString aRangeStr = aBuf.makeStringAndClear();
+    OUString aRangeStr = ScResId(pWhatId) + " " +
+        GetRefString(aTmpRange, rDoc);
     aRsc = aRsc.replaceAt(nPos, 2, aRangeStr); // replace '#1' with the string.
 
-    aBuf.append(rStr).append(aRsc);
-    rStr = aBuf.makeStringAndClear(); // append to the original.
+    rStr += aRsc; // append to the original.
 }
 
 bool ScChangeActionDel::Reject( ScDocument& rDoc )
diff --git a/sc/source/core/tool/compiler.cxx b/sc/source/core/tool/compiler.cxx
index 233038b90c24..488e5ab1fd9f 100644
--- a/sc/source/core/tool/compiler.cxx
+++ b/sc/source/core/tool/compiler.cxx
@@ -688,7 +688,7 @@ static OUString lcl_makeExternalNameStr(const OUString& rFile, const OUString& r
     OUStringBuffer aBuf(aFile.getLength() + aName.getLength() + 9);
     if (bODF)
         aBuf.append( '[');
-    aBuf.append( "'" ).append( aFile ).append( "'" ).append( OUStringChar(cSep) );
+    aBuf.append( "'" + aFile + "'" + OUStringChar(cSep) );
     if (bODF)
         aBuf.append( "$$'" );
     aBuf.append( aName);
@@ -952,7 +952,7 @@ struct ConventionOOO_A1 : public Convention_A1
             else
                 aFile = INetURLObject::decode(rFileName, INetURLObject::DecodeMechanism::Unambiguous);
 
-            rBuffer.append("'").append(aFile.replaceAll("'", "''")).append("'#");
+            rBuffer.append("'" + aFile.replaceAll("'", "''") + "'#");
 
             if (!rRef.IsTabRel())
                 rBuffer.append('$');
diff --git a/sc/source/filter/dif/difimp.cxx b/sc/source/filter/dif/difimp.cxx
index 2e68d4ba57ec..a640ebfba70a 100644
--- a/sc/source/filter/dif/difimp.cxx
+++ b/sc/source/filter/dif/difimp.cxx
@@ -502,9 +502,7 @@ DATASET DifParser::GetNextDataset()
                 ReadNextLine( aTmpLine );
                 if ( eRet == D_SYNT_ERROR )
                 {   // for broken records write "#ERR: data" to cell
-                    m_aData = "#ERR: ";
-                    m_aData.append(pCurrentBuffer).append(" (");
-                    m_aData.append(aTmpLine).append(')');
+                    m_aData = OUString::Concat("#ERR: ") + pCurrentBuffer + " (" +  aTmpLine + ")";
                     eRet = D_STRING;
                 }
                 else
diff --git a/sc/source/filter/excel/xehelper.cxx b/sc/source/filter/excel/xehelper.cxx
index d7b769e2c811..d841789e8b5e 100644
--- a/sc/source/filter/excel/xehelper.cxx
+++ b/sc/source/filter/excel/xehelper.cxx
@@ -739,7 +739,7 @@ void XclExpHFConverter::AppendPortion( const EditTextObject* pTextObj, sal_Unico
                                  (aFontData.mbItalic != aNewData.mbItalic);
                 if( bNewFont || (bNewStyle && pFontList) )
                 {
-                    aParaText.append("&\"").append(aNewData.maName);
+                    aParaText.append("&\"" + aNewData.maName);
                     if( pFontList )
                     {
                         FontMetric aFontMetric( pFontList->Get(
@@ -748,7 +748,7 @@ void XclExpHFConverter::AppendPortion( const EditTextObject* pTextObj, sal_Unico
                             aNewData.mbItalic ? ITALIC_NORMAL : ITALIC_NONE ) );
                         aNewData.maStyle = pFontList->GetStyleName( aFontMetric );
                         if( !aNewData.maStyle.isEmpty() )
-                            aParaText.append(",").append(aNewData.maStyle);
+                            aParaText.append("," + aNewData.maStyle);
                     }
                     aParaText.append("\"");
                 }
@@ -784,7 +784,7 @@ void XclExpHFConverter::AppendPortion( const EditTextObject* pTextObj, sal_Unico
                 aNewData.maColor = aFont.GetColor();
                 if ( !aFontData.maColor.IsRGBEqual( aNewData.maColor ) )
                 {
-                    aParaText.append("&K").append(aNewData.maColor.AsRGBHexString());
+                    aParaText.append("&K" + aNewData.maColor.AsRGBHexString());
                 }
 
                 // strikeout
diff --git a/sc/source/filter/html/htmlexp.cxx b/sc/source/filter/html/htmlexp.cxx
index 5d527f6ca167..ca93cdc02f34 100644
--- a/sc/source/filter/html/htmlexp.cxx
+++ b/sc/source/filter/html/htmlexp.cxx
@@ -490,7 +490,7 @@ OString ScHTMLExport::BorderToStyle(const char* pBorderName,
             aOut.append("; ");
 
         // which border
-        aOut.append("border-").append(pBorderName).append(": ");
+        aOut.append(OString::Concat("border-") + pBorderName + ": ");
 
         // thickness
         int nWidth = pLine->GetWidth();
@@ -715,19 +715,18 @@ void ScHTMLExport::WriteTables()
         // more <TABLE ...>
         if ( bTabAlignedLeft )
         {
-            aByteStrOut.append(' ').append(OOO_STRING_SVTOOLS_HTML_O_align).
-                append("=\"").
-                append(OOO_STRING_SVTOOLS_HTML_AL_left).append('"');
+            aByteStrOut.append(" " OOO_STRING_SVTOOLS_HTML_O_align
+                    "=\""
+                    OOO_STRING_SVTOOLS_HTML_AL_left "\"");
         }
             // ALIGN=LEFT allow text and graphics to flow around
         // CELLSPACING
-        aByteStrOut.append(' ').append(OOO_STRING_SVTOOLS_HTML_O_cellspacing).
-            append("=\"").
+        aByteStrOut.append(" " OOO_STRING_SVTOOLS_HTML_O_cellspacing
+                "=\"").
             append(static_cast<sal_Int32>(nCellSpacing)).append('"');
 
         // BORDER=0, we do the styling of the cells in <TD>
-        aByteStrOut.append(' ').append(OOO_STRING_SVTOOLS_HTML_O_border).
-            append("=\"0\"");
+        aByteStrOut.append(" " OOO_STRING_SVTOOLS_HTML_O_border "=\"0\"");
         IncIndent(1); TAG_ON_LF( aByteStrOut.makeStringAndClear().getStr() );
 
         // --- <COLGROUP> ----
@@ -877,8 +876,7 @@ void ScHTMLExport::WriteCell( sc::ColumnBlockPosition& rBlockPos, SCCOL nCol, SC
     const SvxBoxItem* pBorder = pDoc->GetAttr( nCol, nRow, nTab, ATTR_BORDER );
     if ( pBorder && (pBorder->GetTop() || pBorder->GetBottom() || pBorder->GetLeft() || pBorder->GetRight()) )
     {
-        aStrTD.append(' ').append(OOO_STRING_SVTOOLS_HTML_style).
-            append("=\"");
+        aStrTD.append(" " OOO_STRING_SVTOOLS_HTML_style "=\"");
 
         bool bInsertSemicolon = false;
         aStrTD.append(BorderToStyle("top", pBorder->GetTop(),
@@ -937,8 +935,7 @@ void ScHTMLExport::WriteCell( sc::ColumnBlockPosition& rBlockPos, SCCOL nCol, SC
 
     if ( bTableDataHeight )
     {
-        aStrTD.append(' ').append(OOO_STRING_SVTOOLS_HTML_O_height).
-            append("=\"").
+        aStrTD.append(" " OOO_STRING_SVTOOLS_HTML_O_height "=\"").
             append(static_cast<sal_Int32>(nHeightPixel)).append('"');
     }
 
@@ -1016,8 +1013,8 @@ void ScHTMLExport::WriteCell( sc::ColumnBlockPosition& rBlockPos, SCCOL nCol, SC
         default:                        pChar = OOO_STRING_SVTOOLS_HTML_AL_left;    break;
     }
 
-    aStrTD.append(' ').append(OOO_STRING_SVTOOLS_HTML_O_align).
-        append("=\"").append(pChar).append('"');
+    aStrTD.append(" " OOO_STRING_SVTOOLS_HTML_O_align "=\"" +
+        OString::Concat(pChar) + "\"");
 
     switch( rVerJustifyItem.GetValue() )
     {
@@ -1093,8 +1090,7 @@ void ScHTMLExport::WriteCell( sc::ColumnBlockPosition& rBlockPos, SCCOL nCol, SC
         OStringBuffer aStr(OOO_STRING_SVTOOLS_HTML_font);
         if ( bSetFontName )
         {
-            aStr.append(' ').append(OOO_STRING_SVTOOLS_HTML_O_face).
-                append("=\"");
+            aStr.append(" " OOO_STRING_SVTOOLS_HTML_O_face "=\"");
 
             if (!rFontItem.GetFamilyName().isEmpty())
             {
diff --git a/sc/source/filter/oox/formulabase.cxx b/sc/source/filter/oox/formulabase.cxx
index f6553af07cd9..a6e058c5c453 100644
--- a/sc/source/filter/oox/formulabase.cxx
+++ b/sc/source/filter/oox/formulabase.cxx
@@ -1292,9 +1292,9 @@ bool OpCodeProviderImpl::initOpCode( sal_Int32& ornOpCode, const ApiTokenMap& rT
         }
         return true;
     }
-    OSL_FAIL( OStringBuffer( "OpCodeProviderImpl::initOpCode - opcode for \"" ).
-        append( OUStringToOString( rOdfName, RTL_TEXTENCODING_ASCII_US ) ).
-        append( "\" not found" ).getStr() );
+    OSL_FAIL( OStringBuffer( "OpCodeProviderImpl::initOpCode - opcode for \"" +
+            OUStringToOString( rOdfName, RTL_TEXTENCODING_ASCII_US ) +
+            "\" not found" ).getStr() );
     return false;
 }
 
diff --git a/sc/source/filter/oox/numberformatsbuffer.cxx b/sc/source/filter/oox/numberformatsbuffer.cxx
index 70146cd0747c..eaf960f9e9e2 100644
--- a/sc/source/filter/oox/numberformatsbuffer.cxx
+++ b/sc/source/filter/oox/numberformatsbuffer.cxx
@@ -2040,9 +2040,9 @@ void NumberFormatsBuffer::insertBuiltinFormats()
     BuiltinVec aBuiltinVec;
     BuiltinMap::const_iterator aMIt = aBuiltinMap.find( maLocaleStr ), aMEnd = aBuiltinMap.end();
     OSL_ENSURE( aMIt != aMEnd,
-        OStringBuffer( "NumberFormatsBuffer::insertBuiltinFormats - locale '" ).
-        append( OUStringToOString( maLocaleStr, RTL_TEXTENCODING_ASCII_US ) ).
-        append( "' not supported (#i29949#)" ).getStr() );
+        OStringBuffer( "NumberFormatsBuffer::insertBuiltinFormats - locale '"  +
+            OUStringToOString( maLocaleStr, RTL_TEXTENCODING_ASCII_US ) +
+            "' not supported (#i29949#)" ).getStr() );
     // start with default table, if no table has been found
     if( aMIt == aMEnd )
         aMIt = aBuiltinMap.find( "*" );
diff --git a/sc/source/filter/oox/querytablebuffer.cxx b/sc/source/filter/oox/querytablebuffer.cxx
index 0f561c5ab629..14974c30da71 100644
--- a/sc/source/filter/oox/querytablebuffer.cxx
+++ b/sc/source/filter/oox/querytablebuffer.cxx
@@ -69,7 +69,7 @@ void lclAppendWebQueryTableName( OUStringBuffer& rTables, std::u16string_view rT
     {
         if( !rTables.isEmpty() )
             rTables.append( ';' );
-        rTables.append( "HTML__" ).append( rTableName );
+        rTables.append( OUString::Concat("HTML__") + rTableName );
     }
 }
 
diff --git a/sc/source/ui/app/inputhdl.cxx b/sc/source/ui/app/inputhdl.cxx
index 168334f5cce9..3abf07641963 100644
--- a/sc/source/ui/app/inputhdl.cxx
+++ b/sc/source/ui/app/inputhdl.cxx
@@ -1455,7 +1455,7 @@ void ScInputHandler::ShowFuncList( const ::std::vector< OUString > & rFuncStrVec
     {
         if ( !ppFDesc->getFunctionName().isEmpty() )
         {
-            aTipStr.append(" : ").append(ppFDesc->getDescription());
+            aTipStr.append(" : " + ppFDesc->getDescription());
         }
     }
     ShowTip( aTipStr.makeStringAndClear() );
diff --git a/sc/source/ui/cctrl/checklistmenu.cxx b/sc/source/ui/cctrl/checklistmenu.cxx
index 55072f5d5f9c..4200457956fe 100644
--- a/sc/source/ui/cctrl/checklistmenu.cxx
+++ b/sc/source/ui/cctrl/checklistmenu.cxx
@@ -1349,7 +1349,7 @@ void ScCheckListMenuControl::getResult(ResultType& rResult)
                 std::unique_ptr<weld::TreeIter> xIter(mpChecks->make_iterator(maMembers[i].mxParent.get()));
                 do
                 {
-                    aLabel.append(";").append(mpChecks->get_text(*xIter));
+                    aLabel.append(";" + mpChecks->get_text(*xIter));
                 }
                 while (mpChecks->iter_parent(*xIter));
             }
diff --git a/sc/source/ui/condformat/condformathelper.cxx b/sc/source/ui/condformat/condformathelper.cxx
index 3ae4f301a1a5..b595b6f8d157 100644
--- a/sc/source/ui/condformat/condformathelper.cxx
+++ b/sc/source/ui/condformat/condformathelper.cxx
@@ -204,7 +204,7 @@ OUString ScCondFormatHelper::GetExpression( ScCondFormatEntryType eType, sal_Int
         aBuffer.append(getExpression(nIndex));
         if(nIndex <= 7 || nIndex >= 19)
         {
-            aBuffer.append(" ").append(aStr1);
+            aBuffer.append(OUString::Concat(" ") + aStr1);
             if(nIndex == 6 || nIndex == 7)
             {
                 aBuffer.append(" ");
@@ -216,7 +216,7 @@ OUString ScCondFormatHelper::GetExpression( ScCondFormatEntryType eType, sal_Int
     }
     else if(eType == FORMULA)
     {
-        aBuffer.append(" ").append(aStr1);
+        aBuffer.append(OUString::Concat(" ") + aStr1);
     }
     else if(eType == DATE)
     {
diff --git a/sc/source/ui/dataprovider/datatransformation.cxx b/sc/source/ui/dataprovider/datatransformation.cxx
index 7a03f7ed3871..dfdc72375cb1 100644
--- a/sc/source/ui/dataprovider/datatransformation.cxx
+++ b/sc/source/ui/dataprovider/datatransformation.cxx
@@ -135,7 +135,7 @@ void MergeColumnTransformation::Transform(ScDocument& rDoc) const
         {
             if (itr != nTargetCol)
             {
-                aStr.append(maMergeString).append(rDoc.GetString(itr, nRow, 0));
+                aStr.append(maMergeString + rDoc.GetString(itr, nRow, 0));
             }
         }
         rDoc.SetString(nTargetCol, nRow, 0, aStr.makeStringAndClear());
diff --git a/sc/source/ui/dbgui/asciiopt.cxx b/sc/source/ui/dbgui/asciiopt.cxx
index 5dcb1cbd251f..0d584b5291a6 100644
--- a/sc/source/ui/dbgui/asciiopt.cxx
+++ b/sc/source/ui/dbgui/asciiopt.cxx
@@ -228,17 +228,17 @@ OUString ScAsciiOptions::WriteToString() const
 
     aOutStr.append(",")
                //Token 5: Language
-               .append(static_cast<sal_Int32>(static_cast<sal_uInt16>(eLang))).append(",")
+               .append(static_cast<sal_Int32>(static_cast<sal_uInt16>(eLang))).append("," +
                //Token 6: Import quoted field as text.
-               .append(OUString::boolean( bQuotedFieldAsText )).append(",")
+               OUString::boolean( bQuotedFieldAsText ) + "," +
                //Token 7: Detect special numbers.
-               .append(OUString::boolean( bDetectSpecialNumber )).append(",")
+               OUString::boolean( bDetectSpecialNumber ) + "," +
                // Token 8: used for "Save as shown" in export options
-               .append(OUString::boolean( bSaveAsShown )).append(",")
+               OUString::boolean( bSaveAsShown ) +"," +
                // Token 9: used for "Save cell formulas" in export options
-               .append(OUString::boolean( bSaveFormulas )).append(",")
+               OUString::boolean( bSaveFormulas ) + "," +
                //Token 10: Trim Space
-               .append(OUString::boolean( bRemoveSpace ));
+               OUString::boolean( bRemoveSpace ));
     return aOutStr.makeStringAndClear();
 }
 
diff --git a/sc/source/ui/optdlg/tpusrlst.cxx b/sc/source/ui/optdlg/tpusrlst.cxx
index 0dc4692645d9..c7bcf1c8b893 100644
--- a/sc/source/ui/optdlg/tpusrlst.cxx
+++ b/sc/source/ui/optdlg/tpusrlst.cxx
@@ -363,7 +363,7 @@ void ScTpUserLists::CopyListFromArea( const ScRefAddress& rStartPos,
 
                         if ( !aStrField.isEmpty() )
                         {
-                            aStrList.append(aStrField).append("\n");
+                            aStrList.append(aStrField + "\n");
                         }
                     }
                     else
@@ -386,7 +386,7 @@ void ScTpUserLists::CopyListFromArea( const ScRefAddress& rStartPos,
 
                         if ( !aStrField.isEmpty() )
                         {
-                            aStrList.append(aStrField).append("\n");
+                            aStrList.append(aStrField + "\n");
                         }
                     }
                     else
diff --git a/sc/source/ui/unoobj/PivotTableDataProvider.cxx b/sc/source/ui/unoobj/PivotTableDataProvider.cxx
index 03e53c640718..9d167d862e0e 100644
--- a/sc/source/ui/unoobj/PivotTableDataProvider.cxx
+++ b/sc/source/ui/unoobj/PivotTableDataProvider.cxx
@@ -615,7 +615,7 @@ PivotTableDataProvider::assignLabelsToDataSequence(size_t nIndex)
             }
             else
             {
-                aLabel.append(" - ").append(rItem.m_aString);
+                aLabel.append(" - " + rItem.m_aString);
             }
         }
     }
diff --git a/sc/source/ui/vba/vbahyperlink.cxx b/sc/source/ui/vba/vbahyperlink.cxx
index 9b5140cd0fb1..2bd35542130b 100644
--- a/sc/source/ui/vba/vbahyperlink.cxx
+++ b/sc/source/ui/vba/vbahyperlink.cxx
@@ -78,7 +78,7 @@ ScVbaHyperlink::ScVbaHyperlink( const uno::Reference< XHelperInterface >& rxAnch
             {
                 OUStringBuffer aBuffer( aUrlComp.first );
                 if( !aUrlComp.second.isEmpty() )
-                    aBuffer.append( " - " ).append( aUrlComp.second );
+                    aBuffer.append( " - " + aUrlComp.second );
                 aTextToDisplay = aBuffer.makeStringAndClear();
             }
         }
diff --git a/sc/source/ui/vba/vbanames.cxx b/sc/source/ui/vba/vbanames.cxx
index 7c145f83bda8..8eba8097b236 100644
--- a/sc/source/ui/vba/vbanames.cxx
+++ b/sc/source/ui/vba/vbanames.cxx
@@ -211,7 +211,7 @@ ScVbaNames::Add( const css::uno::Any& Name ,
                 OUString sRangeAdd = xArea->Address( aAny2, aAny2 , aAny2 , aAny2, aAny2 );
                 if ( nArea > 1 )
                     sTmp.append(",");
-                sTmp.append("'").append(xRange->getWorksheet()->getName()).append("'.").append(sRangeAdd);
+                sTmp.append("'" + xRange->getWorksheet()->getName() + "'." + sRangeAdd);
             }
             mxNames->addNewByName( sName, sTmp.makeStringAndClear(), aCellAddr, 0/*nUnoType*/);
             return Item( uno::makeAny( sName ), uno::Any() );
diff --git a/sc/source/ui/view/tabview.cxx b/sc/source/ui/view/tabview.cxx
index f4581d394dd0..b727d817e185 100644
--- a/sc/source/ui/view/tabview.cxx
+++ b/sc/source/ui/view/tabview.cxx
@@ -2411,11 +2411,11 @@ void lcl_createGroupsData(
                 bool bGroupHidden = pEntry->IsHidden();
 
                 rGroupsBuffer
-                    .append("{ \"level\": ").append(sal_Int32(nLevel + 1)).append(", ")
-                    .append("\"index\": ").append(sal_Int32(nIndex)).append(", ")
-                    .append("\"startPos\": ").append(rGroupStartPositions[nLevel]).append(", ")
-                    .append("\"endPos\": ").append(nTotalPx).append(", ")
-                    .append("\"hidden\": ").append(sal_Int32(bGroupHidden ? 1 : 0)).append(" }");
+                    .append("{ \"level\": ").append(sal_Int32(nLevel + 1)).append(", "
+                        "\"index\": ").append(sal_Int32(nIndex)).append(", "
+                        "\"startPos\": ").append(rGroupStartPositions[nLevel]).append(", "
+                        "\"endPos\": ").append(nTotalPx).append(", "
+                        "\"hidden\": ").append(sal_Int32(bGroupHidden ? 1 : 0)).append(" }");
 
                 // look for the next visible group control at level nLevel
                 bool bFound = false;
diff --git a/sd/source/filter/eppt/pptx-epptooxml.cxx b/sd/source/filter/eppt/pptx-epptooxml.cxx
index 13ec3572b701..afed524c0452 100644
--- a/sd/source/filter/eppt/pptx-epptooxml.cxx
+++ b/sd/source/filter/eppt/pptx-epptooxml.cxx
@@ -1746,20 +1746,12 @@ void PowerPointExport::WriteDefaultColorSchemes(const FSHelperPtr& pFS)
             break;
         }
 
-        OUString sOpenColorScheme = OUStringBuffer()
-            .append("<a:")
-            .append(sName)
-            .append(">")
-            .makeStringAndClear();
+        OUString sOpenColorScheme = "<a:" + sName + ">";
         pFS->write(sOpenColorScheme);
 
         pFS->singleElementNS(XML_a, XML_srgbClr, XML_val, I32SHEX(nColor));
 
-        OUString sCloseColorScheme = OUStringBuffer()
-            .append("</a:")
-            .append(sName)
-            .append(">")
-            .makeStringAndClear();
+        OUString sCloseColorScheme = "</a:" + sName + ">";
         pFS->write(sCloseColorScheme);
     }
 }
@@ -1799,20 +1791,12 @@ bool PowerPointExport::WriteColorSchemes(const FSHelperPtr& pFS, const OUString&
                         }
                     }
 
-                    OUString sOpenColorScheme = OUStringBuffer()
-                        .append("<a:")
-                        .append(sName)
-                        .append(">")
-                        .makeStringAndClear();
+                    OUString sOpenColorScheme ="<a:" + sName + ">";
                     pFS->write(sOpenColorScheme);
 
                     pFS->singleElementNS(XML_a, XML_srgbClr, XML_val, I32SHEX(nColor));
 
-                    OUString sCloseColorScheme = OUStringBuffer()
-                        .append("</a:")
-                        .append(sName)
-                        .append(">")
-                        .makeStringAndClear();
+                    OUString sCloseColorScheme = "</a:" + sName + ">";
                     pFS->write(sCloseColorScheme);
                 }
 
diff --git a/sd/source/filter/html/htmlex.cxx b/sd/source/filter/html/htmlex.cxx
index e9aba13346e3..78914a0adf14 100644
--- a/sd/source/filter/html/htmlex.cxx
+++ b/sd/source/filter/html/htmlex.cxx
@@ -325,9 +325,9 @@ OUString getParagraphStyle( SdrOutliner* pOutliner, sal_Int32 nPara )
 void lclAppendStyle(OUStringBuffer& aBuffer, std::u16string_view aTag, std::u16string_view aStyle)
 {
     if (aStyle.empty())
-        aBuffer.append("<").append(aTag).append(">");
+        aBuffer.append(OUString::Concat("<") + aTag + ">");
     else
-        aBuffer.append("<").append(aTag).append(" style=\"").append(aStyle).append("\">");
+        aBuffer.append(OUString::Concat("<") + aTag + " style=\"" + aStyle + "\">");
 }
 
 } // anonymous namespace
@@ -1334,7 +1334,7 @@ void HtmlExport::WriteOutlinerParagraph(OUStringBuffer& aStr, SdrOutliner* pOutl
             lclAppendStyle(aStr, aTag, getParagraphStyle(pOutliner, nIndex));
 
             aStr.append(aParaText);
-            aStr.append("</").append(aTag).append(">\r\n");
+            aStr.append("</" + aTag + ">\r\n");
         }
         else
         {
@@ -1578,7 +1578,7 @@ bool HtmlExport::CreateHtmlForPresPages()
         // HTML Head
         OUStringBuffer aStr(gaHTMLHeader);
         aStr.append(CreateMetaCharset());
-        aStr.append("  <title>" ).append( StringToHTMLString(maPageNames[nSdPage]) ).append("</title>\r\n");
+        aStr.append("  <title>" + StringToHTMLString(maPageNames[nSdPage]) + "</title>\r\n");
 
         // insert timing information
         pPage = maPages[ nSdPage ];
@@ -2793,7 +2793,7 @@ OUString HtmlExport::CreateHTMLPolygonArea( const ::basegfx::B2DPolyPolygon& rPo
             if (nPoint < nNoOfPoints - 1)
                 aStr.append(',');
         }
-        aStr.append("\" href=\"").append(rHRef).append("\">\n");
+        aStr.append(OUString::Concat("\" href=\"") + rHRef + "\">\n");
     }
 
     return aStr.makeStringAndClear();
diff --git a/sd/source/ui/remotecontrol/Communicator.cxx b/sd/source/ui/remotecontrol/Communicator.cxx
index a500d9191131..de55f38f8514 100644
--- a/sd/source/ui/remotecontrol/Communicator.cxx
+++ b/sd/source/ui/remotecontrol/Communicator.cxx
@@ -82,13 +82,12 @@ void Communicator::execute()
                                       Transmitter::PRIORITY_HIGH );
         }
 
-        OStringBuffer aBuffer;
-        aBuffer
-          .append( "slideshow_info\n" )
-          .append( OUStringToOString( ::comphelper::DocumentInfo::getDocumentTitle( xFrame->getController()->getModel() ), RTL_TEXTENCODING_UTF8 ) )
-          .append("\n\n");
+        OString aBuffer =
+            "slideshow_info\n" +
+            OUStringToOString( ::comphelper::DocumentInfo::getDocumentTitle( xFrame->getController()->getModel() ), RTL_TEXTENCODING_UTF8 ) +
+            "\n\n";
 
-        pTransmitter->addMessage( aBuffer.makeStringAndClear(), Transmitter::PRIORITY_LOW );
+        pTransmitter->addMessage( aBuffer.getStr(), Transmitter::PRIORITY_LOW );
     }
     catch (uno::RuntimeException &)
     {
diff --git a/sd/source/ui/remotecontrol/DiscoveryService.cxx b/sd/source/ui/remotecontrol/DiscoveryService.cxx
index 90f88a6c5374..9ed2ae727761 100644
--- a/sd/source/ui/remotecontrol/DiscoveryService.cxx
+++ b/sd/source/ui/remotecontrol/DiscoveryService.cxx
@@ -164,10 +164,9 @@ void SAL_CALL DiscoveryService::run()
             OString aString( aBuffer, strlen( "LOREMOTE_SEARCH" ) );
             if ( aString == "LOREMOTE_SEARCH" )
             {
-                OStringBuffer aStringBuffer("LOREMOTE_ADVERTISE\n");
-                aStringBuffer.append( OUStringToOString(
-                                              osl::SocketAddr::getLocalHostname(), RTL_TEXTENCODING_UTF8 ) )
-                    .append( "\n\n" );
+                OString aStringBuffer = "LOREMOTE_ADVERTISE\n" +
+                    OUStringToOString(osl::SocketAddr::getLocalHostname(), RTL_TEXTENCODING_UTF8 ) +
+                    "\n\n";
                 if ( sendto( mSocket, aStringBuffer.getStr(),
                              aStringBuffer.getLength(), 0, reinterpret_cast<sockaddr*>(&aAddr),
                              sizeof(aAddr) ) <= 0 )
diff --git a/sfx2/source/appl/newhelp.cxx b/sfx2/source/appl/newhelp.cxx
index 4657c87f89c9..102738a8705e 100644
--- a/sfx2/source/appl/newhelp.cxx
+++ b/sfx2/source/appl/newhelp.cxx
@@ -945,10 +945,11 @@ SearchTabPage_Impl::~SearchTabPage_Impl()
 
     for ( sal_Int32 i = 0; i < nCount; ++i )
     {
-        aUserData.append(";").append(INetURLObject::encode(
-            m_xSearchED->get_text(i),
-            INetURLObject::PART_UNO_PARAM_VALUE,
-            INetURLObject::EncodeMechanism::All ));
+        aUserData.append(";" +
+            INetURLObject::encode(
+                m_xSearchED->get_text(i),
+                INetURLObject::PART_UNO_PARAM_VALUE,
+                INetURLObject::EncodeMechanism::All ));
     }
 
     Any aUserItem = makeAny( aUserData.makeStringAndClear() );
diff --git a/sfx2/source/bastyp/frmhtmlw.cxx b/sfx2/source/bastyp/frmhtmlw.cxx
index 4c8b237bb90a..1b83c2be8b1e 100644
--- a/sfx2/source/bastyp/frmhtmlw.cxx
+++ b/sfx2/source/bastyp/frmhtmlw.cxx
@@ -61,13 +61,13 @@ void SfxFrameHTMLWriter::OutMeta( SvStream& rStrm,
         rStrm.WriteCharPtr( pIndent );
 
     OStringBuffer sOut;
-    sOut.append('<').append(OOO_STRING_SVTOOLS_HTML_meta).append(' ')
+    sOut.append("<" OOO_STRING_SVTOOLS_HTML_meta " ")
         .append(bHTTPEquiv ? OOO_STRING_SVTOOLS_HTML_O_httpequiv : OOO_STRING_SVTOOLS_HTML_O_name).append("=\"");
     rStrm.WriteOString( sOut.makeStringAndClear() );
 
     HTMLOutFuncs::Out_String( rStrm, rName, eDestEnc, pNonConvertableChars );
 
-    sOut.append("\" ").append(OOO_STRING_SVTOOLS_HTML_O_content).append("=\"");
+    sOut.append("\" " OOO_STRING_SVTOOLS_HTML_O_content "=\"");
     rStrm.WriteOString( sOut.makeStringAndClear() );
 
     HTMLOutFuncs::Out_String( rStrm, rContent, eDestEnc, pNonConvertableChars ).WriteCharPtr( "\"/>" );
@@ -239,8 +239,7 @@ void SfxFrameHTMLWriter::Out_FrameDescriptor(
             {
                 aURL = URIHelper::simpleNormalizedMakeRelative(
                     rBaseURL, aURL );
-                sOut.append(' ').append(OOO_STRING_SVTOOLS_HTML_O_src)
-                    .append("=\"");
+                sOut.append(" " OOO_STRING_SVTOOLS_HTML_O_src "=\"");
                 rOut.WriteOString( sOut.makeStringAndClear() );
                 HTMLOutFuncs::Out_String( rOut, aURL, eDestEnc, pNonConvertableChars );
                 sOut.append('\"');
@@ -250,8 +249,7 @@ void SfxFrameHTMLWriter::Out_FrameDescriptor(
         aAny = xSet->getPropertyValue("FrameName");
         if ( (aAny >>= aStr) && !aStr.isEmpty() )
         {
-            sOut.append(' ').append(OOO_STRING_SVTOOLS_HTML_O_name)
-                .append("=\"");
+            sOut.append(" " OOO_STRING_SVTOOLS_HTML_O_name "=\"");
             rOut.WriteOString( sOut.makeStringAndClear() );
             HTMLOutFuncs::Out_String( rOut, aStr, eDestEnc, pNonConvertableChars );
             sOut.append('\"');
@@ -279,8 +277,8 @@ void SfxFrameHTMLWriter::Out_FrameDescriptor(
             if ( aAny >>= bVal )
             {
                 const char *pStr = bVal ? sHTML_SC_yes : sHTML_SC_no;
-                sOut.append(' ').append(OOO_STRING_SVTOOLS_HTML_O_scrolling)
-                    .append(pStr);
+                sOut.append(OString::Concat(" " OOO_STRING_SVTOOLS_HTML_O_scrolling) +
+                        pStr);
             }
         }
 
diff --git a/sfx2/source/control/unoctitm.cxx b/sfx2/source/control/unoctitm.cxx
index fbecef81125e..830df11c319b 100644
--- a/sfx2/source/control/unoctitm.cxx
+++ b/sfx2/source/control/unoctitm.cxx
@@ -538,8 +538,7 @@ void UsageInfo::save()
         OStringBuffer aUsageInfoMsg("Document Type;Command;Count");
 
         for (auto const& elem : maUsage)
-            aUsageInfoMsg.append("\n").append(elem.first.toUtf8())
-                .append(";").append(static_cast<sal_Int32>(elem.second));
+            aUsageInfoMsg.append("\n" + elem.first.toUtf8() + ";").append(static_cast<sal_Int32>(elem.second));
 
         sal_uInt64 written = 0;
         auto s = aUsageInfoMsg.makeStringAndClear();
@@ -1309,7 +1308,7 @@ static void InterceptLOKStateChangeEvent(sal_uInt16 nSID, SfxViewFrame* pViewFra
                 aBuffer.append(u'{');
                 for (sal_Int32 itSeq = 0; itSeq < aSeq.getLength(); itSeq++)
                 {
-                    aBuffer.append("\"").append(aSeq[itSeq]);
+                    aBuffer.append("\"" + aSeq[itSeq]);
                     if (itSeq != aSeq.getLength() - 1)
                         aBuffer.append("\":true,");
                     else
diff --git a/sfx2/source/dialog/templdlg.cxx b/sfx2/source/dialog/templdlg.cxx
index efc99c1af294..54ae8fc0e2db 100644
--- a/sfx2/source/dialog/templdlg.cxx
+++ b/sfx2/source/dialog/templdlg.cxx
@@ -1777,7 +1777,7 @@ void SfxCommonTemplateDialog_Impl::DeleteHdl()
     const SfxStyleFamilyItem* pItem = GetFamilyItem_Impl();
 
     OUStringBuffer aMsg;
-    aMsg.append(SfxResId(STR_DELETE_STYLE_USED)).append(SfxResId(STR_DELETE_STYLE));
+    aMsg.append(SfxResId(STR_DELETE_STYLE_USED) + SfxResId(STR_DELETE_STYLE));
 
     pTreeView->selected_foreach([this, pTreeView, pItem, &aList, &bUsedStyle, &aMsg](weld::TreeIter& rEntry){
         aList.emplace_back(pTreeView->make_iterator(&rEntry));
diff --git a/sfx2/source/view/lokhelper.cxx b/sfx2/source/view/lokhelper.cxx
index a19498de467d..d334177d71e6 100644
--- a/sfx2/source/view/lokhelper.cxx
+++ b/sfx2/source/view/lokhelper.cxx
@@ -477,14 +477,14 @@ void SfxLokHelper::notifyWindow(const SfxViewShell* pThisView,
 
     OStringBuffer aPayload;
     aPayload.append("{ \"id\": \"").append(static_cast<sal_Int64>(nLOKWindowId)).append('"');
-    aPayload.append(", \"action\": \"").append(OUStringToOString(rAction, RTL_TEXTENCODING_UTF8)).append('"');
+    aPayload.append(", \"action\": \"" + OUStringToOString(rAction, RTL_TEXTENCODING_UTF8) + "\"");
 
     for (const auto& rItem: rPayload)
     {
         if (!rItem.first.isEmpty() && !rItem.second.isEmpty())
         {
-            aPayload.append(", \"").append(rItem.first).append("\": \"")
-                .append(rItem.second).append('"');
+            aPayload.append(", \"" + rItem.first + "\": \"" +
+                    rItem.second).append('"');
         }
     }
     aPayload.append('}');
diff --git a/starmath/source/mathtype.cxx b/starmath/source/mathtype.cxx
index 6a3147d2f817..cb46776cc618 100644
--- a/starmath/source/mathtype.cxx
+++ b/starmath/source/mathtype.cxx
@@ -316,7 +316,7 @@ bool MathType::LookupChar(sal_Unicode nChar,OUStringBuffer &rRet,sal_uInt8 nVers
             break;
         case 0x2208: // in
         case 0x2209: // notin
-            rRet.append(" func ").append(OUStringChar(nChar)).append(" ");
+            rRet.append(" func " + OUStringChar(nChar) + " ");
             break;
         case 0x220d: // owns
             rRet.append(u" func \u220b ");
@@ -432,7 +432,7 @@ bool MathType::LookupChar(sal_Unicode nChar,OUStringBuffer &rRet,sal_uInt8 nVers
         case 0x2289: // nsupseteq
         case 0x22b2: // NORMAL SUBGROUP OF
         case 0x22b3: // CONTAINS AS NORMAL SUBGROUP
-            rRet.append(" func ").append(OUStringChar(nChar)).append(" ");
+            rRet.append(" func " + OUStringChar(nChar) + " ");
             break;
         case 0x22a5:
             pC = " ortho ";
@@ -1438,7 +1438,7 @@ bool MathType::HandleRecords(int nLevel, sal_uInt8 nSelector,
                                 else if (nPart == 1)
                                 {
                                     rRet.insert(0, sPush);
-                                    rRet.append(" over ").append(sMainTerm);
+                                    rRet.append(" over " + sMainTerm);
                                     sPush.clear();
                                     sMainTerm.clear();
                                 }
@@ -2891,7 +2891,7 @@ bool MathType::HandleChar(sal_Int32 &rTextStart, int &rSetSize, int nLevel,
 
                 aStr.clear();
                 TypeFaceToString(aStr,nTypeFace);
-                rRet.append(aStr).append("{");
+                rRet.append(aStr + "{");
             }
             else
                 rRet.append(" {");
@@ -2935,7 +2935,7 @@ bool MathType::HandleChar(sal_Int32 &rTextStart, int &rSetSize, int nLevel,
 
     if ((xfEMBELL(nTag)) && (!bSilent))
     {
-        rRet.append("}}").append(sPost);  // #i24340# make what would be "vec {A}_n" become "{vec {A}}_n"
+        rRet.append("}}" + sPost);  // #i24340# make what would be "vec {A}_n" become "{vec {A}}_n"
         rTextStart = rRet.getLength();
     }
     return bRet;
diff --git a/svl/source/misc/urihelper.cxx b/svl/source/misc/urihelper.cxx
index 43a4cd500e1b..f5ac858474c2 100644
--- a/svl/source/misc/urihelper.cxx
+++ b/svl/source/misc/urihelper.cxx
@@ -786,16 +786,16 @@ OUString URIHelper::resolveIdnaHost(OUString const & url) {
         return url;
     }
     OUStringBuffer buf(uri->getScheme());
-    buf.append("://").append(auth.subView(0, hostStart));
+    buf.append(OUString::Concat("://") + auth.subView(0, hostStart));
     buf.append(
         reinterpret_cast<sal_Unicode const *>(ascii.getBuffer()),
         ascii.length());
-    buf.append(auth.subView(hostEnd)).append(uri->getPath());
+    buf.append(auth.subView(hostEnd) + uri->getPath());
     if (uri->hasQuery()) {
-        buf.append('?').append(uri->getQuery());
+        buf.append("?" + uri->getQuery());
     }
     if (uri->hasFragment()) {
-        buf.append('#').append(uri->getFragment());
+        buf.append("#" + uri->getFragment());
     }
     return buf.makeStringAndClear();
 }
diff --git a/svl/source/numbers/zforlist.cxx b/svl/source/numbers/zforlist.cxx
index 85ee27638587..a3207d20831b 100644
--- a/svl/source/numbers/zforlist.cxx
+++ b/svl/source/numbers/zforlist.cxx
@@ -4335,7 +4335,7 @@ OUString NfCurrencyEntry::BuildSymbolString(bool bBank,
         if ( aSymbol.indexOf( '-' ) >= 0 ||
              aSymbol.indexOf( ']' ) >= 0)
         {
-            aBuf.append('"').append(aSymbol).append('"');
+            aBuf.append("\"" + aSymbol + "\"");
         }
         else
         {
@@ -4355,7 +4355,7 @@ OUString NfCurrencyEntry::Impl_BuildFormatStringNumChars( const LocaleDataWrappe
                                                           sal_uInt16 nDecimalFormat) const
 {
     OUStringBuffer aBuf;
-    aBuf.append('#').append(rLoc.getNumThousandSep()).append("##0");
+    aBuf.append("#" + rLoc.getNumThousandSep() + "##0");
     if (nDecimalFormat && nDigits)
     {
         aBuf.append(rLoc.getNumDecimalSep());
diff --git a/svl/source/numbers/zformat.cxx b/svl/source/numbers/zformat.cxx
index ade0dac4768f..de73817ff474 100644
--- a/svl/source/numbers/zformat.cxx
+++ b/svl/source/numbers/zformat.cxx
@@ -5136,7 +5136,7 @@ OUString SvNumberformat::GetMappedFormatstring( const NfKeywordTable& rKeywords,
         // lcl_insertLCID() below, in practice as long as it is used for system
         // time and date modifiers it shouldn't (i.e. there is no calendar or
         // numeral specified as well).
-        aStr.append("[$-").append( maLocale.generateCode()).append(']');
+        aStr.append("[$-" + maLocale.generateCode() + "]");
     }
     bool bDefault[4];
     // 1 subformat matches all if no condition specified,
diff --git a/svtools/source/svhtml/htmlout.cxx b/svtools/source/svhtml/htmlout.cxx
index 48beab0039cd..c75d293b6f77 100644
--- a/svtools/source/svhtml/htmlout.cxx
+++ b/svtools/source/svhtml/htmlout.cxx
@@ -625,11 +625,11 @@ SvStream& HTMLOutFuncs::Out_ImageMap( SvStream& rStream,
         return rStream;
 
     OStringBuffer sOut;
-    sOut.append('<')
-        .append(OOO_STRING_SVTOOLS_HTML_map)
-        .append(' ')
-        .append(OOO_STRING_SVTOOLS_HTML_O_name)
-        .append("=\"");
+    sOut.append(OString::Concat("<") +
+            OOO_STRING_SVTOOLS_HTML_map
+            " "
+            OOO_STRING_SVTOOLS_HTML_O_name
+            "=\"");
     rStream.WriteOString( sOut.makeStringAndClear() );
     Out_String( rStream, rOutName, eDestEnc, pNonConvertableChars );
     rStream.WriteCharPtr( "\">" );
@@ -718,11 +718,11 @@ SvStream& HTMLOutFuncs::Out_ImageMap( SvStream& rStream,
                 if( pIndentArea )
                     rStream.WriteCharPtr( pIndentArea );
 
-                sOut.append('<').append(OOO_STRING_SVTOOLS_HTML_area)
-                    .append(' ').append(OOO_STRING_SVTOOLS_HTML_O_shape)
-                    .append('=').append(pShape).append(' ')
-                    .append(OOO_STRING_SVTOOLS_HTML_O_coords).append("=\"")
-                    .append(aCoords).append("\" ");
+                sOut.append(OString::Concat("<") + OOO_STRING_SVTOOLS_HTML_area
+                        " " OOO_STRING_SVTOOLS_HTML_O_shape
+                        "=" + pShape + " "
+                        OOO_STRING_SVTOOLS_HTML_O_coords "=\"" +
+                        aCoords + "\" ");
                 rStream.WriteOString( sOut.makeStringAndClear() );
 
                 OUString aURL( pObj->GetURL() );
@@ -730,7 +730,7 @@ SvStream& HTMLOutFuncs::Out_ImageMap( SvStream& rStream,
                 {
                     aURL = URIHelper::simpleNormalizedMakeRelative(
                         rBaseURL, aURL );
-                    sOut.append(OOO_STRING_SVTOOLS_HTML_O_href).append("=\"");
+                    sOut.append(OOO_STRING_SVTOOLS_HTML_O_href "=\"");
                     rStream.WriteOString( sOut.makeStringAndClear() );
                     Out_String( rStream, aURL, eDestEnc, pNonConvertableChars ).WriteChar( '\"' );
                 }
@@ -740,8 +740,7 @@ SvStream& HTMLOutFuncs::Out_ImageMap( SvStream& rStream,
                 const OUString& rObjName = pObj->GetName();
                 if( !rObjName.isEmpty() )
                 {
-                    sOut.append(' ').append(OOO_STRING_SVTOOLS_HTML_O_name)
-                        .append("=\"");
+                    sOut.append(" " OOO_STRING_SVTOOLS_HTML_O_name "=\"");
                     rStream.WriteOString( sOut.makeStringAndClear() );
                     Out_String( rStream, rObjName, eDestEnc, pNonConvertableChars ).WriteChar( '\"' );
                 }
@@ -749,8 +748,7 @@ SvStream& HTMLOutFuncs::Out_ImageMap( SvStream& rStream,
                 const OUString& rTarget = pObj->GetTarget();
                 if( !rTarget.isEmpty() && pObj->IsActive() )
                 {
-                    sOut.append(' ').append(OOO_STRING_SVTOOLS_HTML_O_target)
-                        .append("=\"");
+                    sOut.append(" " OOO_STRING_SVTOOLS_HTML_O_target "=\"");
                     rStream.WriteOString( sOut.makeStringAndClear() );
                     Out_String( rStream, rTarget, eDestEnc, pNonConvertableChars ).WriteChar( '\"' );
                 }
@@ -761,8 +759,7 @@ SvStream& HTMLOutFuncs::Out_ImageMap( SvStream& rStream,
 
                 if( !rDesc.isEmpty() )
                 {
-                    sOut.append(' ').append(OOO_STRING_SVTOOLS_HTML_O_alt)
-                        .append("=\"");
+                    sOut.append(" " OOO_STRING_SVTOOLS_HTML_O_alt "=\"");
                     rStream.WriteOString( sOut.makeStringAndClear() );
                     Out_String( rStream, rDesc, eDestEnc, pNonConvertableChars ).WriteChar( '\"' );
                 }
@@ -808,9 +805,7 @@ SvStream& HTMLOutFuncs::OutScript( SvStream& rStrm,
 
     if( !rLanguage.isEmpty() )
     {
-        sOut.append(' ')
-            .append(OOO_STRING_SVTOOLS_HTML_O_language)
-            .append("=\"");
+        sOut.append(" " OOO_STRING_SVTOOLS_HTML_O_language "=\"");
         rStrm.WriteOString( sOut.makeStringAndClear() );
         Out_String( rStrm, rLanguage, eDestEnc, pNonConvertableChars );
         sOut.append('\"');
@@ -818,7 +813,7 @@ SvStream& HTMLOutFuncs::OutScript( SvStream& rStrm,
 
     if( !rSrc.isEmpty() )
     {
-        sOut.append(' ').append(OOO_STRING_SVTOOLS_HTML_O_src).append("=\"");
+        sOut.append(" " OOO_STRING_SVTOOLS_HTML_O_src "=\"");
         rStrm.WriteOString( sOut.makeStringAndClear() );
         Out_String( rStrm, URIHelper::simpleNormalizedMakeRelative(rBaseURL, rSrc), eDestEnc, pNonConvertableChars );
         sOut.append('\"');
@@ -826,8 +821,7 @@ SvStream& HTMLOutFuncs::OutScript( SvStream& rStrm,
 
     if( STARBASIC != eScriptType && pSBLibrary )
     {
-        sOut.append(' ').append(OOO_STRING_SVTOOLS_HTML_O_sdlibrary)
-            .append("=\"");
+        sOut.append(" " OOO_STRING_SVTOOLS_HTML_O_sdlibrary "=\"");
         rStrm.WriteOString( sOut.makeStringAndClear() );
         Out_String( rStrm, *pSBLibrary, eDestEnc, pNonConvertableChars );
         sOut.append('\"');
@@ -835,8 +829,7 @@ SvStream& HTMLOutFuncs::OutScript( SvStream& rStrm,
 
     if( STARBASIC != eScriptType && pSBModule )
     {
-        sOut.append(' ').append(OOO_STRING_SVTOOLS_HTML_O_sdmodule)
-            .append("=\"");
+        sOut.append(" " OOO_STRING_SVTOOLS_HTML_O_sdmodule "=\"");
         rStrm.WriteOString( sOut.makeStringAndClear() );
         Out_String( rStrm, *pSBModule, eDestEnc, pNonConvertableChars );
         sOut.append('\"');
@@ -860,19 +853,15 @@ SvStream& HTMLOutFuncs::OutScript( SvStream& rStrm,
         {
             if( pSBLibrary )
             {
-                sOut.append("' ")
-                    .append(OOO_STRING_SVTOOLS_HTML_SB_library)
-                    .append(' ')
-                    .append(OUStringToOString(*pSBLibrary, eDestEnc));
+                sOut.append("' " OOO_STRING_SVTOOLS_HTML_SB_library " " +
+                            OUStringToOString(*pSBLibrary, eDestEnc));
                 rStrm.WriteOString( sOut.makeStringAndClear() ).WriteCharPtr( SAL_NEWLINE_STRING );
             }
 
             if( pSBModule )
             {
-                sOut.append("' ")
-                    .append(OOO_STRING_SVTOOLS_HTML_SB_module)
-                    .append(' ')
-                    .append(OUStringToOString(*pSBModule, eDestEnc));
+                sOut.append("' " OOO_STRING_SVTOOLS_HTML_SB_module " " +
+                        OUStringToOString(*pSBModule, eDestEnc));
                 rStrm.WriteOString( sOut.makeStringAndClear() ).WriteCharPtr( SAL_NEWLINE_STRING );
             }
         }
@@ -948,16 +937,12 @@ OString HTMLOutFuncs::CreateTableDataOptionsValNum(
         OUString aValStr;
         rFormatter.GetInputLineString( fVal, 0, aValStr );
         OString sTmp(OUStringToOString(aValStr, eDestEnc));
-        aStrTD.append(' ').
-            append(OOO_STRING_SVTOOLS_HTML_O_SDval).
-            append("=\"").
-            append(sTmp).append('\"');
+        aStrTD.append(" " OOO_STRING_SVTOOLS_HTML_O_SDval "=\"" +
+                sTmp + "\"");
     }
     if ( bValue || nFormat )
     {
-        aStrTD.append(' ').
-            append(OOO_STRING_SVTOOLS_HTML_O_SDnum).
-            append("=\"").
+        aStrTD.append(" " OOO_STRING_SVTOOLS_HTML_O_SDnum "=\"").
             append(static_cast<sal_Int32>(static_cast<sal_uInt16>(
                 Application::GetSettings().GetLanguageTag().getLanguageType()))).
             append(';'); // Language for Format 0
diff --git a/sw/source/core/edit/editsh.cxx b/sw/source/core/edit/editsh.cxx
index 60a0b7eea389..9be63fb05251 100644
--- a/sw/source/core/edit/editsh.cxx
+++ b/sw/source/core/edit/editsh.cxx
@@ -576,7 +576,7 @@ OUString SwEditShell::Calculate()
                                                   pStart->nContent.GetIndex() );
                             bValidFields = true;
                         }
-                        aFormel.append("(").append(aCalc.GetStrResult( aCalc.VarLook( sVar )->nValue )).append(")");
+                        aFormel.append("(" + aCalc.GetStrResult( aCalc.VarLook( sVar )->nValue ) + ")");
                     }
                     else
                         aFormel.append(sVar);
diff --git a/sw/source/core/fields/cellfml.cxx b/sw/source/core/fields/cellfml.cxx
index 17c5dbf1d070..0ed5d21c293d 100644
--- a/sw/source/core/fields/cellfml.cxx
+++ b/sw/source/core/fields/cellfml.cxx
@@ -1115,17 +1115,17 @@ void SwTableFormula::SplitMergeBoxNm_( const SwTable& rTable, OUStringBuffer& rN
                 if( pFnd == rTableUpd.m_aData.pDelTable )
                 {
                     if( rTableUpd.m_pTable != &rTable ) // not the current one
-                        rNewStr.append(rTableUpd.m_pTable->GetFrameFormat()->GetName()).append("."); // set new table name
+                        rNewStr.append(rTableUpd.m_pTable->GetFrameFormat()->GetName() + "."); // set new table name
                     rTableUpd.m_bModified = true;
                 }
                 else if( pFnd != rTableUpd.m_pTable ||
                     ( rTableUpd.m_pTable != &rTable && &rTable != rTableUpd.m_aData.pDelTable))
-                    rNewStr.append(sTableNm).append("."); // keep table name
+                    rNewStr.append(sTableNm + "."); // keep table name
                 else
                     rTableUpd.m_bModified = true;
             }
             else
-                rNewStr.append(sTableNm).append(".");     // keep table name
+                rNewStr.append(sTableNm + ".");     // keep table name
         }
     }
     if( pTableNmBox == pLastBox )
@@ -1207,18 +1207,18 @@ void SwTableFormula::SplitMergeBoxNm_( const SwTable& rTable, OUStringBuffer& rN
             if( !bInNewTable )
             {
                 rTableUpd.m_bModified = true;
-                rNewStr.append(rTableUpd.m_pTable->GetFrameFormat()->GetName()).append(".");
+                rNewStr.append(rTableUpd.m_pTable->GetFrameFormat()->GetName() + ".");
             }
             else if( !sTableNm.isEmpty() )
-                rNewStr.append(sTableNm).append(".");
+                rNewStr.append(sTableNm + ".");
         }
         else if( bInNewTable )
         {
             rTableUpd.m_bModified = true;
-            rNewStr.append(*rTableUpd.m_aData.pNewTableNm).append(".");
+            rNewStr.append(*rTableUpd.m_aData.pNewTableNm + ".");
         }
         else if( !sTableNm.isEmpty() )
-            rNewStr.append(sTableNm).append(".");
+            rNewStr.append(sTableNm + ".");
     }
 
     if( pLastBox )
diff --git a/sw/source/filter/html/htmldrawwriter.cxx b/sw/source/filter/html/htmldrawwriter.cxx
index 504bf766f78c..f9ac9a39542c 100644
--- a/sw/source/filter/html/htmldrawwriter.cxx
+++ b/sw/source/filter/html/htmldrawwriter.cxx
@@ -152,8 +152,8 @@ Writer& OutHTML_DrawFrameFormatAsMarquee( Writer& rWrt,
 
     if( pStr )
     {
-        sOut.append(' ').append(OOO_STRING_SVTOOLS_HTML_O_behavior).
-            append("=\"").append(pStr).append("\"");
+        sOut.append(OString::Concat(" " OOO_STRING_SVTOOLS_HTML_O_behavior "=\"") +
+                pStr + "\"");
     }
 
     // DIRECTION
@@ -169,21 +169,21 @@ Writer& OutHTML_DrawFrameFormatAsMarquee( Writer& rWrt,
 
     if( pStr )
     {
-        sOut.append(' ').append(OOO_STRING_SVTOOLS_HTML_O_direction).
-            append("=\"").append(pStr).append("\"");
+        sOut.append(OString::Concat(" " OOO_STRING_SVTOOLS_HTML_O_direction
+                "=\"") + pStr + "\"");
     }
 
     // LOOP
     sal_Int32 nCount = rItemSet.Get( SDRATTR_TEXT_ANICOUNT ).GetValue();
     if( 0==nCount )
         nCount = SdrTextAniKind::Slide==eAniKind ? 1 : -1;
-    sOut.append(' ').append(OOO_STRING_SVTOOLS_HTML_O_loop).append("=\"").
+    sOut.append(" " OOO_STRING_SVTOOLS_HTML_O_loop "=\"").
         append(nCount).append("\"");
 
     // SCROLLDELAY
     sal_uInt16 nDelay = rItemSet.Get( SDRATTR_TEXT_ANIDELAY ).GetValue();
-    sOut.append(' ').append(OOO_STRING_SVTOOLS_HTML_O_scrolldelay).
-        append("=\"").append(static_cast<sal_Int32>(nDelay)).append("\"");
+    sOut.append(" " OOO_STRING_SVTOOLS_HTML_O_scrolldelay
+            "=\"").append(static_cast<sal_Int32>(nDelay)).append("\"");
 
     // SCROLLAMOUNT
     sal_Int16 nAmount = rItemSet.Get( SDRATTR_TEXT_ANIAMOUNT ).GetValue();
@@ -199,8 +199,8 @@ Writer& OutHTML_DrawFrameFormatAsMarquee( Writer& rWrt,
     }
     if( nAmount )
     {
-        sOut.append(' ').append(OOO_STRING_SVTOOLS_HTML_O_scrollamount).
-            append("=\"").append(static_cast<sal_Int32>(nAmount)).append("\"");
+        sOut.append(" " OOO_STRING_SVTOOLS_HTML_O_scrollamount
+                "=\"").append(static_cast<sal_Int32>(nAmount)).append("\"");
     }
 
     Size aTwipSz( pTextObj->GetLogicRect().GetSize() );
@@ -230,14 +230,14 @@ Writer& OutHTML_DrawFrameFormatAsMarquee( Writer& rWrt,
 
         if( aPixelSz.Width() )
         {
-            sOut.append(' ').append(OOO_STRING_SVTOOLS_HTML_O_width).
-                append("=\"").append(static_cast<sal_Int32>(aPixelSz.Width())).append("\"");
+            sOut.append(" " OOO_STRING_SVTOOLS_HTML_O_width
+                    "=\"").append(static_cast<sal_Int32>(aPixelSz.Width())).append("\"");
         }
 
         if( aPixelSz.Height() )
         {
-            sOut.append(' ').append(OOO_STRING_SVTOOLS_HTML_O_height).
-                append("=\"").append(static_cast<sal_Int32>(aPixelSz.Height())).append("\"");
+            sOut.append(" " OOO_STRING_SVTOOLS_HTML_O_height
+                    "=\"").append(static_cast<sal_Int32>(aPixelSz.Height())).append("\"");
         }
     }
 
@@ -249,7 +249,7 @@ Writer& OutHTML_DrawFrameFormatAsMarquee( Writer& rWrt,
         const Color& rFillColor =
             rItemSet.Get(XATTR_FILLCOLOR).GetColorValue();
 
-        sOut.append(' ').append(OOO_STRING_SVTOOLS_HTML_O_bgcolor).append("=");
+        sOut.append(" " OOO_STRING_SVTOOLS_HTML_O_bgcolor "=");
         rWrt.Strm().WriteOString( sOut.makeStringAndClear() );
         HTMLOutFuncs::Out_Color( rWrt.Strm(), rFillColor );
     }
diff --git a/sw/source/filter/html/htmlfldw.cxx b/sw/source/filter/html/htmlfldw.cxx
index dac2ffc2108b..a8c15702686c 100644
--- a/sw/source/filter/html/htmlfldw.cxx
+++ b/sw/source/filter/html/htmlfldw.cxx
@@ -284,16 +284,14 @@ static Writer& OutHTML_SwField( Writer& rWrt, const SwField* pField,
         }
         if( !aName.isEmpty() )
         {
-            sOut.append(' ').append(OOO_STRING_SVTOOLS_HTML_O_name).
-                append("=\"");
+            sOut.append(" " OOO_STRING_SVTOOLS_HTML_O_name "=\"");
             rWrt.Strm().WriteOString( sOut.makeStringAndClear() );
             HTMLOutFuncs::Out_String( rWrt.Strm(), aName, rHTMLWrt.m_eDestEnc, &rHTMLWrt.m_aNonConvertableCharacters );
             sOut.append('\"');
         }
         if( !aValue.isEmpty() )
         {
-            sOut.append(' ').append(OOO_STRING_SVTOOLS_HTML_O_value).
-                append("=\"");
+            sOut.append(" " OOO_STRING_SVTOOLS_HTML_O_value "=\"");
             rWrt.Strm().WriteOString( sOut.makeStringAndClear() );
             HTMLOutFuncs::Out_String( rWrt.Strm(), aValue, rHTMLWrt.m_eDestEnc, &rHTMLWrt.m_aNonConvertableCharacters );
             sOut.append('\"');
diff --git a/sw/source/filter/html/htmlflywriter.cxx b/sw/source/filter/html/htmlflywriter.cxx
index 2d323864a4e3..7064622fb7f9 100644
--- a/sw/source/filter/html/htmlflywriter.cxx
+++ b/sw/source/filter/html/htmlflywriter.cxx
@@ -436,9 +436,9 @@ void SwHTMLWriter::OutFrameFormat( AllHtmlFlags nMode, const SwFrameFormat& rFra
         aContainerStr = (HtmlContainerFlags::Div == nCntnrMode)
                             ? OOO_STRING_SVTOOLS_HTML_division
                             : OOO_STRING_SVTOOLS_HTML_span;
-        sOut.append('<').append(GetNamespace() + aContainerStr).append(' ')
-            .append(OOO_STRING_SVTOOLS_HTML_O_class).append("=\"")
-            .append("sd-abs-pos").append('\"');
+        sOut.append("<" + GetNamespace() + aContainerStr + " "
+                OOO_STRING_SVTOOLS_HTML_O_class "=\""
+                "sd-abs-pos\"");
         Strm().WriteOString( sOut.makeStringAndClear() );
 
         // Output a width for non-draw objects
@@ -532,8 +532,7 @@ OString SwHTMLWriter::OutFrameFormatOptions( const SwFrameFormat &rFrameFormat,
     {
         const char *pStr =
             (nFrameOpts & HtmlFrmOpts::Id) ? OOO_STRING_SVTOOLS_HTML_O_id : OOO_STRING_SVTOOLS_HTML_O_name;
-        sOut.append(' ').append(pStr).
-            append("=\"");
+        sOut.append(OString::Concat(" ") + pStr + "=\"");
         Strm().WriteOString( sOut.makeStringAndClear() );
         HTMLOutFuncs::Out_String( Strm(), rFrameFormat.GetName(), m_eDestEnc, &m_aNonConvertableCharacters );
         sOut.append('\"');
@@ -550,8 +549,7 @@ OString SwHTMLWriter::OutFrameFormatOptions( const SwFrameFormat &rFrameFormat,
     // ALT
     if( (nFrameOpts & HtmlFrmOpts::Alt) && !rAlternateText.isEmpty() )
     {
-        sOut.append(' ').append(OOO_STRING_SVTOOLS_HTML_O_alt).
-            append("=\"");
+        sOut.append(" " OOO_STRING_SVTOOLS_HTML_O_alt "=\"");
         Strm().WriteOString( sOut.makeStringAndClear() );
         HTMLOutFuncs::Out_String( Strm(), rAlternateText, m_eDestEnc, &m_aNonConvertableCharacters );
         sOut.append('\"');
@@ -597,8 +595,8 @@ OString SwHTMLWriter::OutFrameFormatOptions( const SwFrameFormat &rFrameFormat,
     }
     if( pStr )
     {
-        sOut.append(' ').append(OOO_STRING_SVTOOLS_HTML_O_align).append("=\"").
-            append(pStr).append("\"");
+        sOut.append(OString::Concat(" " OOO_STRING_SVTOOLS_HTML_O_align "=\"") +
+                pStr + "\"");
     }
 
     // HSPACE and VSPACE
@@ -634,14 +632,14 @@ OString SwHTMLWriter::OutFrameFormatOptions( const SwFrameFormat &rFrameFormat,
 
         if( aPixelSpc.Width() )
         {
-            sOut.append(' ').append(OOO_STRING_SVTOOLS_HTML_O_hspace).
-                append("=\"").append(static_cast<sal_Int32>(aPixelSpc.Width())).append("\"");
+            sOut.append(" " OOO_STRING_SVTOOLS_HTML_O_hspace
+                    "=\"").append(static_cast<sal_Int32>(aPixelSpc.Width())).append("\"");
         }
 
         if( aPixelSpc.Height() )
         {
-            sOut.append(' ').append(OOO_STRING_SVTOOLS_HTML_O_vspace).
-                append("=\"").append(static_cast<sal_Int32>(aPixelSpc.Height())).append("\"");
+            sOut.append(" " OOO_STRING_SVTOOLS_HTML_O_vspace
+                    "=\"").append(static_cast<sal_Int32>(aPixelSpc.Height())).append("\"");
         }
     }
 
@@ -708,8 +706,7 @@ OString SwHTMLWriter::OutFrameFormatOptions( const SwFrameFormat &rFrameFormat,
         if( (nFrameOpts & HtmlFrmOpts::Width) &&
             ((nPercentWidth && nPercentWidth!=255) || aPixelSz.Width()) )
         {
-            sOut.append(' ').append(OOO_STRING_SVTOOLS_HTML_O_width).
-                append("=\"");
+            sOut.append(" " OOO_STRING_SVTOOLS_HTML_O_width "=\"");
             if( nPercentWidth )
                 sOut.append(static_cast<sal_Int32>(nPercentWidth)).append('%');
             else
@@ -720,8 +717,7 @@ OString SwHTMLWriter::OutFrameFormatOptions( const SwFrameFormat &rFrameFormat,
         if( (nFrameOpts & HtmlFrmOpts::Height) &&
             ((nPercentHeight && nPercentHeight!=255) || aPixelSz.Height()) )
         {
-            sOut.append(' ').append(OOO_STRING_SVTOOLS_HTML_O_height).
-                append("=\"");
+            sOut.append(" " OOO_STRING_SVTOOLS_HTML_O_height "=\"");
             if( nPercentHeight )
                 sOut.append(static_cast<sal_Int32>(nPercentHeight)).append('%');
             else
@@ -791,9 +787,9 @@ OString SwHTMLWriter::OutFrameFormatOptions( const SwFrameFormat &rFrameFormat,
 
         if( pStr )
         {
-            sOut.append('<').append(OOO_STRING_SVTOOLS_HTML_linebreak).
-                append(' ').append(OOO_STRING_SVTOOLS_HTML_O_clear).
-                append("=\"").append(pStr).append("\">");
+            sOut.append("<" OOO_STRING_SVTOOLS_HTML_linebreak
+                    " " OOO_STRING_SVTOOLS_HTML_O_clear
+                    "=\"" + OString::Concat(pStr) + "\">");
             sRetEndTags = sOut.makeStringAndClear();
         }
     }
@@ -1494,17 +1490,17 @@ Writer& OutHTML_BulletImage( Writer& rWrt,
         sOut.append('<').append(pTag);
 
     sOut.append(' ');
-    sOut.append(OOO_STRING_SVTOOLS_HTML_O_style).append("=\"");
+    sOut.append(OOO_STRING_SVTOOLS_HTML_O_style "=\"");
     if(!aLink.isEmpty())
     {
-        sOut.append(OOO_STRING_SVTOOLS_HTML_O_src).append("=\"");
+        sOut.append(OOO_STRING_SVTOOLS_HTML_O_src "=\"");
         rWrt.Strm().WriteOString( sOut.makeStringAndClear() );
         HTMLOutFuncs::Out_String( rWrt.Strm(), aLink, rHTMLWrt.m_eDestEnc, &rHTMLWrt.m_aNonConvertableCharacters );
     }
     else
     {
-        sOut.append("list-style-image: ").append("url(").
-        append(OOO_STRING_SVTOOLS_HTML_O_data).append(":");
+        sOut.append("list-style-image: url("
+                OOO_STRING_SVTOOLS_HTML_O_data ":");
         rWrt.Strm().WriteOString( sOut.makeStringAndClear() );
         HTMLOutFuncs::Out_String( rWrt.Strm(), aGraphicInBase64, rHTMLWrt.m_eDestEnc, &rHTMLWrt.m_aNonConvertableCharacters );
         sOut.append(");");
@@ -1590,8 +1586,8 @@ static Writer & OutHTML_FrameFormatAsMulticol( Writer& rWrt,
     sal_uInt16 nCols = rFormatCol.GetNumCols();
     if( nCols )
     {
-        sOut.append(' ').append(OOO_STRING_SVTOOLS_HTML_O_cols).
-            append("=\"").append(static_cast<sal_Int32>(nCols)).append("\"");
+        sOut.append(" " OOO_STRING_SVTOOLS_HTML_O_cols
+                "=\"").append(static_cast<sal_Int32>(nCols)).append("\"");
     }
 
     // the Gutter width (minimum value) as GUTTER
@@ -1604,8 +1600,8 @@ static Writer & OutHTML_FrameFormatAsMulticol( Writer& rWrt,
                             ->LogicToPixel( Size(nGutter,0),
                                             MapMode(MapUnit::MapTwip) ).Width());
         }
-        sOut.append(' ').append(OOO_STRING_SVTOOLS_HTML_O_gutter).
-            append("=\"").append(static_cast<sal_Int32>(nGutter)).append("\"");
+        sOut.append(" " OOO_STRING_SVTOOLS_HTML_O_gutter
+                "=\"").append(static_cast<sal_Int32>(nGutter)).append("\"");
     }
 
     rWrt.Strm().WriteOString( sOut.makeStringAndClear() );
@@ -1941,8 +1937,8 @@ Writer& OutHTML_HeaderFooter( Writer& rWrt, const SwFrameFormat& rFrameFormat,
     // output as Multicol
     rHTMLWrt.OutNewLine();
     OStringBuffer sOut;
-    sOut.append(OOO_STRING_SVTOOLS_HTML_division).append(' ')
-        .append(OOO_STRING_SVTOOLS_HTML_O_title).append("=\"")
+    sOut.append(OOO_STRING_SVTOOLS_HTML_division " "
+            OOO_STRING_SVTOOLS_HTML_O_title "=\"")
         .append( bHeader ? "header" : "footer" ).append("\"");
     HTMLOutFuncs::Out_AsciiTag( rWrt.Strm(), OString(rHTMLWrt.GetNamespace() + sOut) );
 
@@ -1963,11 +1959,11 @@ Writer& OutHTML_HeaderFooter( Writer& rWrt, const SwFrameFormat& rFrameFormat,
         nSize = static_cast<sal_Int16>(Application::GetDefaultDevice()
             ->LogicToPixel( Size(nSize,0), MapMode(MapUnit::MapTwip) ).Width());
 
-        aSpacer = OStringBuffer(OOO_STRING_SVTOOLS_HTML_spacer).
-            append(' ').append(OOO_STRING_SVTOOLS_HTML_O_type).
-            append("=\"").append(OOO_STRING_SVTOOLS_HTML_SPTYPE_vertical).append("\"").
-            append(' ').append(OOO_STRING_SVTOOLS_HTML_O_size).
-            append("=\"").append(static_cast<sal_Int32>(nSize)).append("\"").
+        aSpacer = OStringBuffer(OOO_STRING_SVTOOLS_HTML_spacer
+                " " OOO_STRING_SVTOOLS_HTML_O_type
+                "=\"" OOO_STRING_SVTOOLS_HTML_SPTYPE_vertical "\""
+                " " OOO_STRING_SVTOOLS_HTML_O_size
+                "=\"").append(static_cast<sal_Int32>(nSize)).append("\"").
             makeStringAndClear();
     }
 
diff --git a/sw/source/filter/html/htmlftn.cxx b/sw/source/filter/html/htmlftn.cxx
index 4dbe9f3250dd..0f0a0098e1a8 100644
--- a/sw/source/filter/html/htmlftn.cxx
+++ b/sw/source/filter/html/htmlftn.cxx
@@ -434,18 +434,18 @@ void SwHTMLWriter::OutFootEndNoteSym( const SwFormatFootnote& rFormatFootnote,
     }
 
     OStringBuffer sOut;
-    sOut.append('<').append(GetNamespace() + OOO_STRING_SVTOOLS_HTML_anchor).append(' ')
-        .append(OOO_STRING_SVTOOLS_HTML_O_class).append("=\"");
+    sOut.append("<" + GetNamespace() + OOO_STRING_SVTOOLS_HTML_anchor " "
+            OOO_STRING_SVTOOLS_HTML_O_class "=\"");
     Strm().WriteOString( sOut.makeStringAndClear() );
     HTMLOutFuncs::Out_String( Strm(), sClass, m_eDestEnc, &m_aNonConvertableCharacters );
-    sOut.append("\" ").append(OOO_STRING_SVTOOLS_HTML_O_name).append("=\"");
+    sOut.append("\" " OOO_STRING_SVTOOLS_HTML_O_name "=\"");
     Strm().WriteOString( sOut.makeStringAndClear() );
     HTMLOutFuncs::Out_String( Strm(), sFootnoteName, m_eDestEnc, &m_aNonConvertableCharacters );
-    sOut.append(OOO_STRING_SVTOOLS_HTML_FTN_symbol).append("\" ")
-        .append(OOO_STRING_SVTOOLS_HTML_O_href).append("=\"#");
+    sOut.append(OOO_STRING_SVTOOLS_HTML_FTN_symbol "\" "
+            OOO_STRING_SVTOOLS_HTML_O_href "=\"#");
     Strm().WriteOString( sOut.makeStringAndClear() );
     HTMLOutFuncs::Out_String( Strm(), sFootnoteName, m_eDestEnc, &m_aNonConvertableCharacters );
-    sOut.append(OOO_STRING_SVTOOLS_HTML_FTN_anchor).append("\">");
+    sOut.append(OOO_STRING_SVTOOLS_HTML_FTN_anchor "\">");
     Strm().WriteOString( sOut.makeStringAndClear() );
 
     HTMLOutFuncs::Out_String( Strm(), rNum, m_eDestEnc, &m_aNonConvertableCharacters );
diff --git a/sw/source/filter/html/htmlplug.cxx b/sw/source/filter/html/htmlplug.cxx
index 95dbd157c620..9e82ac075e83 100644
--- a/sw/source/filter/html/htmlplug.cxx
+++ b/sw/source/filter/html/htmlplug.cxx
@@ -1235,8 +1235,7 @@ Writer& OutHTML_FrameFormatOLENode( Writer& rWrt, const SwFrameFormat& rFrameFor
 
         if( !aURL.isEmpty() )
         {
-            sOut.append(' ').append(OOO_STRING_SVTOOLS_HTML_O_src)
-                .append("=\"");
+            sOut.append(" " OOO_STRING_SVTOOLS_HTML_O_src "=\"");
             rWrt.Strm().WriteOString( sOut.makeStringAndClear() );
             HTMLOutFuncs::Out_String( rWrt.Strm(), aURL, rHTMLWrt.m_eDestEnc, &rHTMLWrt.m_aNonConvertableCharacters );
             sOut.append('\"');
@@ -1246,8 +1245,7 @@ Writer& OutHTML_FrameFormatOLENode( Writer& rWrt, const SwFrameFormat& rFrameFor
         aAny = xSet->getPropertyValue("PluginMimeType");
         if( (aAny >>= aType) && !aType.isEmpty() )
         {
-            sOut.append(' ').append(OOO_STRING_SVTOOLS_HTML_O_type)
-                .append("=\"");
+            sOut.append(" " OOO_STRING_SVTOOLS_HTML_O_type "=\"");
             rWrt.Strm().WriteOString( sOut.makeStringAndClear() );
             HTMLOutFuncs::Out_String( rWrt.Strm(), aType, rHTMLWrt.m_eDestEnc, &rHTMLWrt.m_aNonConvertableCharacters );
             sOut.append('\"');
@@ -1281,8 +1279,7 @@ Writer& OutHTML_FrameFormatOLENode( Writer& rWrt, const SwFrameFormat& rFrameFor
             OUString sCodeBase( URIHelper::simpleNormalizedMakeRelative(rWrt.GetBaseURL(), aCd) );
             if( !sCodeBase.isEmpty() )
             {
-                sOut.append(' ').append(OOO_STRING_SVTOOLS_HTML_O_codebase)
-                    .append("=\"");
+                sOut.append(" " OOO_STRING_SVTOOLS_HTML_O_codebase "=\"");
                 rWrt.Strm().WriteOString( sOut.makeStringAndClear() );
                 HTMLOutFuncs::Out_String( rWrt.Strm(), sCodeBase, rHTMLWrt.m_eDestEnc, &rHTMLWrt.m_aNonConvertableCharacters );
                 sOut.append('\"');
@@ -1293,8 +1290,7 @@ Writer& OutHTML_FrameFormatOLENode( Writer& rWrt, const SwFrameFormat& rFrameFor
         OUString aClass;
         aAny = xSet->getPropertyValue("AppletCode");
         aAny >>= aClass;
-        sOut.append(' ').append(OOO_STRING_SVTOOLS_HTML_O_code)
-            .append("=\"");
+        sOut.append(" " OOO_STRING_SVTOOLS_HTML_O_code "=\"");
         rWrt.Strm().WriteOString( sOut.makeStringAndClear() );
         HTMLOutFuncs::Out_String( rWrt.Strm(), aClass, rHTMLWrt.m_eDestEnc, &rHTMLWrt.m_aNonConvertableCharacters );
         sOut.append('\"');
@@ -1305,8 +1301,7 @@ Writer& OutHTML_FrameFormatOLENode( Writer& rWrt, const SwFrameFormat& rFrameFor
         aAny >>= aAppletName;
         if( !aAppletName.isEmpty() )
         {
-            sOut.append(' ').append(OOO_STRING_SVTOOLS_HTML_O_name)
-                .append("=\"");
+            sOut.append(" " OOO_STRING_SVTOOLS_HTML_O_name "=\"");
             rWrt.Strm().WriteOString( sOut.makeStringAndClear() );
             HTMLOutFuncs::Out_String( rWrt.Strm(), aAppletName, rHTMLWrt.m_eDestEnc, &rHTMLWrt.m_aNonConvertableCharacters );
             sOut.append('\"');
@@ -1390,13 +1385,12 @@ Writer& OutHTML_FrameFormatOLENode( Writer& rWrt, const SwFrameFormat& rFrameFor
             const OUString& rValue = rCommand.GetArgument();
             rHTMLWrt.OutNewLine();
             OStringBuffer sBuf;
-            sBuf.append('<').append(rHTMLWrt.GetNamespace() + OOO_STRING_SVTOOLS_HTML_param)
-                .append(' ').append(OOO_STRING_SVTOOLS_HTML_O_name)
-                .append("=\"");
+            sBuf.append("<" + rHTMLWrt.GetNamespace() + OOO_STRING_SVTOOLS_HTML_param
+                    " " OOO_STRING_SVTOOLS_HTML_O_name
+                    "=\"");
             rWrt.Strm().WriteOString( sBuf.makeStringAndClear() );
             HTMLOutFuncs::Out_String( rWrt.Strm(), rName, rHTMLWrt.m_eDestEnc, &rHTMLWrt.m_aNonConvertableCharacters );
-            sBuf.append("\" ").append(OOO_STRING_SVTOOLS_HTML_O_value)
-                .append("=\"");
+            sBuf.append("\" " OOO_STRING_SVTOOLS_HTML_O_value "=\"");
             rWrt.Strm().WriteOString( sBuf.makeStringAndClear() );
             HTMLOutFuncs::Out_String( rWrt.Strm(), rValue, rHTMLWrt.m_eDestEnc, &rHTMLWrt.m_aNonConvertableCharacters ).WriteCharPtr( "\">" );
         }
diff --git a/sw/source/filter/html/htmltabw.cxx b/sw/source/filter/html/htmltabw.cxx
index 817d74784356..e05d4124e6b5 100644
--- a/sw/source/filter/html/htmltabw.cxx
+++ b/sw/source/filter/html/htmltabw.cxx
@@ -309,13 +309,13 @@ void SwHTMLWrtTable::OutTableCell( SwHTMLWriter& rWrt,
     // output ROW- and COLSPAN
     if( nRowSpan>1 )
     {
-        sOut.append(' ').append(OOO_STRING_SVTOOLS_HTML_O_rowspan).
-            append("=\"").append(static_cast<sal_Int32>(nRowSpan)).append("\"");
+        sOut.append(" " OOO_STRING_SVTOOLS_HTML_O_rowspan
+                "=\"").append(static_cast<sal_Int32>(nRowSpan)).append("\"");
     }
     if( nColSpan > 1 )
     {
-        sOut.append(' ').append(OOO_STRING_SVTOOLS_HTML_O_colspan).
-            append("=\"").append(static_cast<sal_Int32>(nColSpan)).append("\"");
+        sOut.append(" " OOO_STRING_SVTOOLS_HTML_O_colspan
+                "=\"").append(static_cast<sal_Int32>(nColSpan)).append("\"");
     }
 
     tools::Long nWidth = 0;
@@ -367,8 +367,7 @@ void SwHTMLWrtTable::OutTableCell( SwHTMLWriter& rWrt,
     // output WIDTH: from layout or calculated
     if( bOutWidth )
     {
-        sOut.append(' ').append(OOO_STRING_SVTOOLS_HTML_O_width).
-            append("=\"");
+        sOut.append(" " OOO_STRING_SVTOOLS_HTML_O_width "=\"");
         if( nPercentWidth != SAL_MAX_UINT32 )
         {
             sOut.append(static_cast<sal_Int32>(nPercentWidth)).append('%');
@@ -388,8 +387,8 @@ void SwHTMLWrtTable::OutTableCell( SwHTMLWriter& rWrt,
 
     if( nHeight )
     {
-        sOut.append(' ').append(OOO_STRING_SVTOOLS_HTML_O_height)
-            .append("=\"").append(static_cast<sal_Int32>(aPixelSz.Height())).append("\"");
+        sOut.append(" " OOO_STRING_SVTOOLS_HTML_O_height
+                "=\"").append(static_cast<sal_Int32>(aPixelSz.Height())).append("\"");
     }
 
     const SfxItemSet& rItemSet = pBox->GetFrameFormat()->GetAttrSet();
@@ -403,8 +402,8 @@ void SwHTMLWrtTable::OutTableCell( SwHTMLWriter& rWrt,
         sal_Int16 eVertOri = pCell->GetVertOri();
         if( text::VertOrientation::TOP==eVertOri || text::VertOrientation::BOTTOM==eVertOri )
         {
-            sOut.append(' ').append(OOO_STRING_SVTOOLS_HTML_O_valign)
-                .append("=\"").append(text::VertOrientation::TOP==eVertOri ?
+            sOut.append(" " OOO_STRING_SVTOOLS_HTML_O_valign
+                    "=\"").append(text::VertOrientation::TOP==eVertOri ?
                     OOO_STRING_SVTOOLS_HTML_VA_top :
                     OOO_STRING_SVTOOLS_HTML_VA_bottom)
                 .append("\"");
@@ -544,8 +543,8 @@ void SwHTMLWrtTable::OutTableCells( SwHTMLWriter& rWrt,
     if( text::VertOrientation::TOP==eRowVertOri || text::VertOrientation::BOTTOM==eRowVertOri )
     {
         OStringBuffer sOut;
-        sOut.append(' ').append(OOO_STRING_SVTOOLS_HTML_O_valign)
-            .append("=\"").append(text::VertOrientation::TOP==eRowVertOri ? OOO_STRING_SVTOOLS_HTML_VA_top : OOO_STRING_SVTOOLS_HTML_VA_bottom)
+        sOut.append(" " OOO_STRING_SVTOOLS_HTML_O_valign
+                "=\"").append(text::VertOrientation::TOP==eRowVertOri ? OOO_STRING_SVTOOLS_HTML_VA_top : OOO_STRING_SVTOOLS_HTML_VA_bottom)
             .append("\"");
         rWrt.Strm().WriteOString( sOut.makeStringAndClear() );
     }
@@ -628,25 +627,24 @@ void SwHTMLWrtTable::Write( SwHTMLWriter& rWrt, sal_Int16 eAlign,
     // output ALIGN=
     if( text::HoriOrientation::RIGHT == eAlign )
     {
-        sOut.append(' ').append(OOO_STRING_SVTOOLS_HTML_O_align).
-            append("=\"").append(OOO_STRING_SVTOOLS_HTML_AL_right).append("\"");
+        sOut.append(" " OOO_STRING_SVTOOLS_HTML_O_align
+                "=\"" OOO_STRING_SVTOOLS_HTML_AL_right "\"");
     }
     else if( text::HoriOrientation::CENTER == eAlign )
     {
-        sOut.append(' ').append(OOO_STRING_SVTOOLS_HTML_O_align).
-            append("=\"").append(OOO_STRING_SVTOOLS_HTML_AL_center).append("\"");
+        sOut.append(" " OOO_STRING_SVTOOLS_HTML_O_align
+                "=\"" OOO_STRING_SVTOOLS_HTML_AL_center "\"");
     }
     else if( text::HoriOrientation::LEFT == eAlign )
     {
-        sOut.append(' ').append(OOO_STRING_SVTOOLS_HTML_O_align).
-            append("=\"").append(OOO_STRING_SVTOOLS_HTML_AL_left).append("\"");
+        sOut.append(" " OOO_STRING_SVTOOLS_HTML_O_align
+                "=\"" OOO_STRING_SVTOOLS_HTML_AL_left "\"");
     }
 
     // output WIDTH: from layout or calculated
     if( m_nTabWidth )
     {
-        sOut.append(' ').append(OOO_STRING_SVTOOLS_HTML_O_width).
-            append("=\"");
+        sOut.append(" " OOO_STRING_SVTOOLS_HTML_O_width "=\"");
         if( HasRelWidths() )
             sOut.append(static_cast<sal_Int32>(m_nTabWidth)).append('%');
         else if( Application::GetDefaultDevice() )
@@ -678,24 +676,24 @@ void SwHTMLWrtTable::Write( SwHTMLWriter& rWrt, sal_Int16 eAlign,
 
         if( aPixelSpc.Width() )
         {
-            sOut.append(' ').append(OOO_STRING_SVTOOLS_HTML_O_hspace).
-                append("=\"").append(static_cast<sal_Int32>(aPixelSpc.Width())).append("\"");
+            sOut.append(" " OOO_STRING_SVTOOLS_HTML_O_hspace
+                    "=\"").append(static_cast<sal_Int32>(aPixelSpc.Width())).append("\"");
         }
 
         if( aPixelSpc.Height() )
         {
-            sOut.append(' ').append(OOO_STRING_SVTOOLS_HTML_O_vspace).
-                append("=\"").append(static_cast<sal_Int32>(aPixelSpc.Height())).append("\"");
+            sOut.append(" " OOO_STRING_SVTOOLS_HTML_O_vspace
+                    "=\"").append(static_cast<sal_Int32>(aPixelSpc.Height())).append("\"");
         }
     }
 
     // output CELLPADDING: from layout or calculated
-    sOut.append(' ').append(OOO_STRING_SVTOOLS_HTML_O_cellpadding).
-        append("=\"").append(static_cast<sal_Int32>(SwHTMLWriter::ToPixel(m_nCellPadding,false))).append("\"");
+    sOut.append(" " OOO_STRING_SVTOOLS_HTML_O_cellpadding
+            "=\"").append(static_cast<sal_Int32>(SwHTMLWriter::ToPixel(m_nCellPadding,false))).append("\"");
 
     // output CELLSPACING: from layout or calculated
-    sOut.append(' ').append(OOO_STRING_SVTOOLS_HTML_O_cellspacing).
-        append("=\"").append(static_cast<sal_Int32>(SwHTMLWriter::ToPixel(m_nCellSpacing,false))).append("\"");
+    sOut.append(" " OOO_STRING_SVTOOLS_HTML_O_cellspacing
+            "=\"").append(static_cast<sal_Int32>(SwHTMLWriter::ToPixel(m_nCellSpacing,false))).append("\"");
 
     rWrt.Strm().WriteOString( sOut.makeStringAndClear() );
 
@@ -718,7 +716,7 @@ void SwHTMLWrtTable::Write( SwHTMLWriter& rWrt, sal_Int16 eAlign,
     {
         rWrt.OutNewLine(); // <CAPTION> in new line
         OStringBuffer sOutStr(OOO_STRING_SVTOOLS_HTML_caption);
-        sOutStr.append(' ').append(OOO_STRING_SVTOOLS_HTML_O_align).append("=\"")
+        sOutStr.append(" " OOO_STRING_SVTOOLS_HTML_O_align "=\"")
                .append(bTopCaption ? OOO_STRING_SVTOOLS_HTML_VA_top : OOO_STRING_SVTOOLS_HTML_VA_bottom)
                .append("\"");
         HTMLOutFuncs::Out_AsciiTag( rWrt.Strm(), OString(rWrt.GetNamespace() + sOutStr) );
diff --git a/sw/source/filter/html/swhtml.cxx b/sw/source/filter/html/swhtml.cxx
index 768361341d01..078dae27f0ac 100644
--- a/sw/source/filter/html/swhtml.cxx
+++ b/sw/source/filter/html/swhtml.cxx
@@ -2103,7 +2103,7 @@ void SwHTMLParser::NextToken( HtmlTokenId nToken )
         if( !aToken.isEmpty() )
         {
             UnescapeToken();
-            aComment.append(" ").append(aToken);
+            aComment.append(" " + aToken);
         }
         aComment.append(">");
         InsertComment( aComment.makeStringAndClear() );
diff --git a/sw/source/filter/ww8/docxattributeoutput.cxx b/sw/source/filter/ww8/docxattributeoutput.cxx
index 2b7cb420d6c6..48f1e1512f79 100644
--- a/sw/source/filter/ww8/docxattributeoutput.cxx
+++ b/sw/source/filter/ww8/docxattributeoutput.cxx
@@ -9038,8 +9038,8 @@ void DocxAttributeOutput::FormatVertOrientation( const SwFormatVertOrient& rFlyV
     {
         m_rExport.SdrExporter().getTextFrameStyle().append(";margin-top:").append(double(rFlyVert.GetPos()) / 20).append("pt");
         if ( !sAlign.isEmpty() )
-            m_rExport.SdrExporter().getTextFrameStyle().append(";mso-position-vertical:").append(sAlign);
-        m_rExport.SdrExporter().getTextFrameStyle().append(";mso-position-vertical-relative:").append(sVAnchor);
+            m_rExport.SdrExporter().getTextFrameStyle().append(";mso-position-vertical:" + sAlign);
+        m_rExport.SdrExporter().getTextFrameStyle().append(";mso-position-vertical-relative:" + sVAnchor);
     }
     else if (m_rExport.SdrExporter().getDMLTextFrameSyntax())
     {
@@ -9064,8 +9064,8 @@ void DocxAttributeOutput::FormatHorizOrientation( const SwFormatHoriOrient& rFly
     {
         m_rExport.SdrExporter().getTextFrameStyle().append(";margin-left:").append(double(rFlyHori.GetPos()) / 20).append("pt");
         if ( !sAlign.isEmpty() )
-            m_rExport.SdrExporter().getTextFrameStyle().append(";mso-position-horizontal:").append(sAlign);
-        m_rExport.SdrExporter().getTextFrameStyle().append(";mso-position-horizontal-relative:").append(sHAnchor);
+            m_rExport.SdrExporter().getTextFrameStyle().append(";mso-position-horizontal:" + sAlign);
+        m_rExport.SdrExporter().getTextFrameStyle().append(";mso-position-horizontal-relative:" + sHAnchor);
     }
     else if (m_rExport.SdrExporter().getDMLTextFrameSyntax())
     {
diff --git a/sw/source/filter/ww8/docxsdrexport.cxx b/sw/source/filter/ww8/docxsdrexport.cxx
index 1803ae90084a..539eb63c20b1 100644
--- a/sw/source/filter/ww8/docxsdrexport.cxx
+++ b/sw/source/filter/ww8/docxsdrexport.cxx
@@ -1622,11 +1622,7 @@ void DocxSdrExport::writeVMLTextFrame(ww8::Frame const* pParentFrame, bool bText
     if (!bTextBoxOnly)
     {
         OString sRotation(OString::number(m_pImpl->getDMLandVMLTextFrameRotation().get() / -100));
-        m_pImpl->getExport()
-            .SdrExporter()
-            .getTextFrameStyle()
-            .append(";rotation:")
-            .append(sRotation);
+        m_pImpl->getExport().SdrExporter().getTextFrameStyle().append(";rotation:" + sRotation);
     }
     m_pImpl->getExport().OutputFormat(pParentFrame->GetFrameFormat(), false, false, true);
     m_pImpl->getFlyAttrList()->add(XML_style, m_pImpl->getTextFrameStyle().makeStringAndClear());
diff --git a/sw/source/filter/ww8/rtfattributeoutput.cxx b/sw/source/filter/ww8/rtfattributeoutput.cxx
index 63fd05d4d225..978e44ded2c0 100644
--- a/sw/source/filter/ww8/rtfattributeoutput.cxx
+++ b/sw/source/filter/ww8/rtfattributeoutput.cxx
@@ -451,34 +451,28 @@ OString RtfAttributeOutput::MoveCharacterProperties(bool aAutoWriteRtlLtr)
     {
         if (!aAssocRtlch.isEmpty())
         {
-            aBuf.append(OOO_STRING_SVTOOLS_RTF_LTRCH)
-                .append(aAssocLtrch)
-                .append(' ')
-                .append(OOO_STRING_SVTOOLS_RTF_RTLCH)
-                .append(aAssocRtlch);
+            aBuf.append(OOO_STRING_SVTOOLS_RTF_LTRCH + aAssocLtrch
+                        + " " OOO_STRING_SVTOOLS_RTF_RTLCH + aAssocRtlch);
         }
     }
     else
     {
         if (!aAssocRtlch.isEmpty())
         {
-            aBuf.append(OOO_STRING_SVTOOLS_RTF_RTLCH)
-                .append(aAssocRtlch)
-                .append(' ')
-                .append(OOO_STRING_SVTOOLS_RTF_LTRCH)
-                .append(aAssocLtrch);
+            aBuf.append(OOO_STRING_SVTOOLS_RTF_RTLCH + aAssocRtlch
+                        + " " OOO_STRING_SVTOOLS_RTF_LTRCH + aAssocLtrch);
         }
         if (!aAssocHich.isEmpty())
         {
-            aBuf.append(OOO_STRING_SVTOOLS_RTF_HICH).append(aAssocHich);
+            aBuf.append(OOO_STRING_SVTOOLS_RTF_HICH + aAssocHich);
         }
         if (!aNormal.isEmpty())
         {
-            aBuf.append(OOO_STRING_SVTOOLS_RTF_LOCH).append(aNormal);
+            aBuf.append(OOO_STRING_SVTOOLS_RTF_LOCH + aNormal);
         }
         if (!aAssocDbch.isEmpty())
         {
-            aBuf.append(OOO_STRING_SVTOOLS_RTF_DBCH).append(aAssocDbch);
+            aBuf.append(OOO_STRING_SVTOOLS_RTF_DBCH + aAssocDbch);
         }
     }
 
@@ -1086,7 +1080,7 @@ void RtfAttributeOutput::EndTableRow()
             m_aAfterRuns.append(m_aTables.back());
             m_aTables.pop_back();
         }
-        m_aAfterRuns.append(OOO_STRING_SVTOOLS_RTF_ROW).append(OOO_STRING_SVTOOLS_RTF_PARD);
+        m_aAfterRuns.append(OOO_STRING_SVTOOLS_RTF_ROW OOO_STRING_SVTOOLS_RTF_PARD);
     }
     m_bTableRowEnded = true;
 }
@@ -2321,12 +2315,10 @@ void RtfAttributeOutput::OutputFlyFrame_Impl(const ww8::Frame& rFrame, const Poi
 
                             xPropSet->getPropertyValue("StringItemList") >>= aStrSeq;
                             for (const auto& rStr : std::as_const(aStrSeq))
-                                m_aRun
-                                    ->append(
-                                        "{" OOO_STRING_SVTOOLS_RTF_IGNORE OOO_STRING_SVTOOLS_RTF_FFL
-                                        " ")
-                                    .append(OUStringToOString(rStr, m_rExport.GetCurrentEncoding()))
-                                    .append('}');
+                                m_aRun->append(
+                                    "{" OOO_STRING_SVTOOLS_RTF_IGNORE OOO_STRING_SVTOOLS_RTF_FFL " "
+                                    + OUStringToOString(rStr, m_rExport.GetCurrentEncoding())
+                                    + "}");
 
                             m_aRun->append("}}");
 
diff --git a/sw/source/filter/ww8/rtfexport.cxx b/sw/source/filter/ww8/rtfexport.cxx
index f3bc81771ad1..ca3247ba3498 100644
--- a/sw/source/filter/ww8/rtfexport.cxx
+++ b/sw/source/filter/ww8/rtfexport.cxx
@@ -352,28 +352,23 @@ void RtfExport::DoFormText(const SwInputField* pField)
     m_pAttrOutput->RunText().append(OOO_STRING_SVTOOLS_RTF_FFTYPETXT "0");
 
     if (!sName.isEmpty())
-        m_pAttrOutput->RunText()
-            .append("{" OOO_STRING_SVTOOLS_RTF_IGNORE OOO_STRING_SVTOOLS_RTF_FFNAME " ")
-            .append(msfilter::rtfutil::OutString(sName, m_eDefaultEncoding))
-            .append("}");
+        m_pAttrOutput->RunText().append(
+            "{" OOO_STRING_SVTOOLS_RTF_IGNORE OOO_STRING_SVTOOLS_RTF_FFNAME " "
+            + msfilter::rtfutil::OutString(sName, m_eDefaultEncoding) + "}");
     if (!rHelp.isEmpty())
-        m_pAttrOutput->RunText()
-            .append("{" OOO_STRING_SVTOOLS_RTF_IGNORE OOO_STRING_SVTOOLS_RTF_FFHELPTEXT " ")
-            .append(msfilter::rtfutil::OutString(rHelp, m_eDefaultEncoding))
-            .append("}");
-    m_pAttrOutput->RunText()
-        .append("{" OOO_STRING_SVTOOLS_RTF_IGNORE OOO_STRING_SVTOOLS_RTF_FFDEFTEXT " ")
-        .append(msfilter::rtfutil::OutString(sResult, m_eDefaultEncoding))
-        .append("}");
+        m_pAttrOutput->RunText().append(
+            "{" OOO_STRING_SVTOOLS_RTF_IGNORE OOO_STRING_SVTOOLS_RTF_FFHELPTEXT " "
+            + msfilter::rtfutil::OutString(rHelp, m_eDefaultEncoding) + "}");
+    m_pAttrOutput->RunText().append(
+        "{" OOO_STRING_SVTOOLS_RTF_IGNORE OOO_STRING_SVTOOLS_RTF_FFDEFTEXT " "
+        + msfilter::rtfutil::OutString(sResult, m_eDefaultEncoding) + "}");
     if (!rStatus.isEmpty())
-        m_pAttrOutput->RunText()
-            .append("{" OOO_STRING_SVTOOLS_RTF_IGNORE OOO_STRING_SVTOOLS_RTF_FFSTATTEXT " ")
-            .append(msfilter::rtfutil::OutString(rStatus, m_eDefaultEncoding))
-            .append("}");
+        m_pAttrOutput->RunText().append(
+            "{" OOO_STRING_SVTOOLS_RTF_IGNORE OOO_STRING_SVTOOLS_RTF_FFSTATTEXT " "
+            + msfilter::rtfutil::OutString(rStatus, m_eDefaultEncoding) + "}");
     m_pAttrOutput->RunText().append("}}}{" OOO_STRING_SVTOOLS_RTF_FLDRSLT " ");
-    m_pAttrOutput->RunText()
-        .append(msfilter::rtfutil::OutString(sResult, m_eDefaultEncoding))
-        .append("}}");
+    m_pAttrOutput->RunText().append(msfilter::rtfutil::OutString(sResult, m_eDefaultEncoding)
+                                    + "}}");
 }
 
 sal_uLong RtfExport::ReplaceCr(sal_uInt8 /*nChar*/)
diff --git a/sw/source/filter/ww8/rtfsdrexport.cxx b/sw/source/filter/ww8/rtfsdrexport.cxx
index 59be0e879393..f4c2e3deca3e 100644
--- a/sw/source/filter/ww8/rtfsdrexport.cxx
+++ b/sw/source/filter/ww8/rtfsdrexport.cxx
@@ -435,10 +435,8 @@ void RtfSdrExport::Commit(EscherPropertyContainer& rProps, const tools::Rectangl
             case ESCHER_Prop_fillBlip:
             {
                 OStringBuffer aBuf;
-                aBuf.append('{')
-                    .append(OOO_STRING_SVTOOLS_RTF_PICT)
-                    .append(OOO_STRING_SVTOOLS_RTF_PNGBLIP)
-                    .append(SAL_NEWLINE_STRING);
+                aBuf.append("{" OOO_STRING_SVTOOLS_RTF_PICT OOO_STRING_SVTOOLS_RTF_PNGBLIP
+                                SAL_NEWLINE_STRING);
                 int nHeaderSize
                     = 25; // The first bytes are WW8-specific, we're only interested in the PNG
                 aBuf.append(msfilter::rtfutil::WriteHex(rOpt.nProp.data() + nHeaderSize,
@@ -486,19 +484,15 @@ void RtfSdrExport::AddRectangleDimensions(OStringBuffer& rBuffer,
     rBuffer.append(OOO_STRING_SVTOOLS_RTF_SHPBOTTOM).append(rRectangle.Bottom());
 }
 
-static void lcl_AppendSP(OStringBuffer& rRunText, const char cName[], std::string_view rValue)
+static void lcl_AppendSP(OStringBuffer& rRunText, const char* cName, std::string_view rValue)
 {
-    rRunText.append('{')
-        .append(OOO_STRING_SVTOOLS_RTF_SP)
-        .append('{')
-        .append(OOO_STRING_SVTOOLS_RTF_SN " ")
-        .append(cName)
-        .append('}')
-        .append('{')
-        .append(OOO_STRING_SVTOOLS_RTF_SV " ")
-        .append(rValue)
-        .append('}')
-        .append('}');
+    rRunText.append(OString::Concat("{" OOO_STRING_SVTOOLS_RTF_SP "{" OOO_STRING_SVTOOLS_RTF_SN " ")
+                    + cName
+                    + "}"
+                      "{" OOO_STRING_SVTOOLS_RTF_SV " "
+                    + rValue
+                    + "}"
+                      "}");
 }
 
 void RtfSdrExport::impl_writeGraphic()
@@ -536,7 +530,7 @@ void RtfSdrExport::impl_writeGraphic()
 
     // Add it to the properties.
     RtfStringBuffer aBuf;
-    aBuf->append('{').append(OOO_STRING_SVTOOLS_RTF_PICT).append(OOO_STRING_SVTOOLS_RTF_PNGBLIP);
+    aBuf->append("{" OOO_STRING_SVTOOLS_RTF_PICT OOO_STRING_SVTOOLS_RTF_PNGBLIP);
     aBuf->append(OOO_STRING_SVTOOLS_RTF_PICW).append(sal_Int32(aMapped.Width()));
     aBuf->append(OOO_STRING_SVTOOLS_RTF_PICH)
         .append(sal_Int32(aMapped.Height()))
@@ -556,10 +550,8 @@ sal_Int32 RtfSdrExport::StartShape()
         impl_writeGraphic();
 
     m_rAttrOutput.RunText().append('{').append(OOO_STRING_SVTOOLS_RTF_SHP);
-    m_rAttrOutput.RunText()
-        .append('{')
-        .append(OOO_STRING_SVTOOLS_RTF_IGNORE)
-        .append(OOO_STRING_SVTOOLS_RTF_SHPINST);
+    m_rAttrOutput.RunText().append(
+        "{" OOO_STRING_SVTOOLS_RTF_IGNORE OOO_STRING_SVTOOLS_RTF_SHPINST);
 
     m_rAttrOutput.RunText().append(m_aShapeStyle.makeStringAndClear());
     // Ignore \shpbxpage, \shpbxmargin, and \shpbxcolumn, in favor of the posrelh property.
diff --git a/sw/source/ui/dbui/createaddresslistdialog.cxx b/sw/source/ui/dbui/createaddresslistdialog.cxx
index 969bff35d7ad..39a8a1dc8a59 100644
--- a/sw/source/ui/dbui/createaddresslistdialog.cxx
+++ b/sw/source/ui/dbui/createaddresslistdialog.cxx
@@ -402,11 +402,11 @@ void lcl_WriteValues(const std::vector<OUString> *pFields, SvStream* pStream)
     {
         if (aIter==aBegin)
         {
-            sLine.append("\"").append(*aIter).append("\"");
+            sLine.append("\"" + *aIter + "\"");
         }
         else
         {
-            sLine.append("\t\"").append(*aIter).append("\"");
+            sLine.append("\t\"" + *aIter + "\"");
         }
     }
     pStream->WriteByteStringLine( sLine.makeStringAndClear(), RTL_TEXTENCODING_UTF8 );
diff --git a/sw/source/uibase/app/docstyle.cxx b/sw/source/uibase/app/docstyle.cxx
index 570d2575c6c1..ce8a92633018 100644
--- a/sw/source/uibase/app/docstyle.cxx
+++ b/sw/source/uibase/app/docstyle.cxx
@@ -1006,10 +1006,10 @@ OUString  SwDocStyleSheet::GetDescription(MapUnit eUnit)
         {
             if (!aDesc.isEmpty())
                 aDesc.append(sPlus);
-            aDesc.append(SwResId(STR_PAGEBREAK)).append(sPlus).append(sModel);
+            aDesc.append(SwResId(STR_PAGEBREAK) + sPlus + sModel);
             if (sPageNum != "0")
             {
-                aDesc.append(sPlus).append(SwResId(STR_PAGEOFFSET)).append(sPageNum);
+                aDesc.append(sPlus + SwResId(STR_PAGEOFFSET) + sPageNum);
             }
         }
         else if (!sBreak.isEmpty()) // Break can be valid only when NO Model
diff --git a/sw/source/uibase/shells/annotsh.cxx b/sw/source/uibase/shells/annotsh.cxx
index 70e1ef1086dd..d29ba3d24bb2 100644
--- a/sw/source/uibase/shells/annotsh.cxx
+++ b/sw/source/uibase/shells/annotsh.cxx
@@ -1647,7 +1647,7 @@ void SwAnnotationShell::StateUndo(SfxItemSet &rSet)
                     if( nCount )
                     {
                         for( sal_uInt16 n = 0; n < nCount; ++n )
-                            sList.append( (pUndoManager->*fnGetComment)( n, SfxUndoManager::TopLevel ) ).append("\n");
+                            sList.append( (pUndoManager->*fnGetComment)( n, SfxUndoManager::TopLevel ) + "\n");
                     }
 
                     SfxStringListItem aItem( nWhich );
diff --git a/sw/source/uibase/shells/drwtxtsh.cxx b/sw/source/uibase/shells/drwtxtsh.cxx
index 780b7260a5ae..d8f5fa419999 100644
--- a/sw/source/uibase/shells/drwtxtsh.cxx
+++ b/sw/source/uibase/shells/drwtxtsh.cxx
@@ -568,7 +568,7 @@ void SwDrawTextShell::StateUndo(SfxItemSet &rSet)
                     {
                         OUStringBuffer sList;
                         for( sal_uInt16 n = 0; n < nCount; ++n )
-                            sList.append( (pUndoManager->*fnGetComment)( n, SfxUndoManager::TopLevel ) ).append("\n");
+                            sList.append( (pUndoManager->*fnGetComment)( n, SfxUndoManager::TopLevel ) + "\n");
 
                         SfxStringListItem aItem( nWhich );
                         aItem.SetString( sList.makeStringAndClear() );
diff --git a/sw/source/uibase/wrtsh/wrtundo.cxx b/sw/source/uibase/wrtsh/wrtundo.cxx
index 49d73d75e579..6b087fad7b6d 100644
--- a/sw/source/uibase/wrtsh/wrtundo.cxx
+++ b/sw/source/uibase/wrtsh/wrtundo.cxx
@@ -130,7 +130,7 @@ void SwWrtShell::GetDoStrings( DoType eDoType, SfxStringListItem& rStrs ) const
     for (const OUString & comment : comments)
     {
         OSL_ENSURE(!comment.isEmpty(), "no Undo/Redo Text set");
-        buf.append(comment).append("\n");
+        buf.append(comment + "\n");
     }
     rStrs.SetString(buf.makeStringAndClear());
 }
diff --git a/ucb/source/core/provprox.cxx b/ucb/source/core/provprox.cxx
index 08836311b0cf..3424b27aca94 100644
--- a/ucb/source/core/provprox.cxx
+++ b/ucb/source/core/provprox.cxx
@@ -351,7 +351,9 @@ UcbContentProviderProxy::getContentProvider()
     }
 
     OSL_ENSURE( m_xProvider.is(),
-        OStringBuffer("UcbContentProviderProxy::getContentProvider - No provider for '").append(OUStringToOString(m_aService, osl_getThreadTextEncoding())).append(".").getStr() );
+        OStringBuffer("UcbContentProviderProxy::getContentProvider - No provider for '" +
+            OUStringToOString(m_aService, osl_getThreadTextEncoding()) +
+            ".").getStr() );
     return m_xTargetProvider;
 }
 
diff --git a/ucb/source/ucp/cmis/cmis_url.cxx b/ucb/source/ucp/cmis/cmis_url.cxx
index ae2bce9dd59a..38c63df8bf9f 100644
--- a/ucb/source/ucp/cmis/cmis_url.cxx
+++ b/ucb/source/ucp/cmis/cmis_url.cxx
@@ -90,7 +90,7 @@ namespace cmis
 
                 if ( !sSegment.isEmpty( ) )
                 {
-                    sEncodedPath.append("/").append(rtl::Uri::encode( sSegment,
+                    sEncodedPath.append("/" + rtl::Uri::encode( sSegment,
                             rtl_UriCharClassRelSegment,
                             rtl_UriEncodeKeepEscapes,
                             RTL_TEXTENCODING_UTF8 ));
diff --git a/ucb/source/ucp/ftp/ftpurl.cxx b/ucb/source/ucp/ftp/ftpurl.cxx
index da2db0eaa208..d6afdc8610df 100644
--- a/ucb/source/ucp/ftp/ftpurl.cxx
+++ b/ucb/source/ucp/ftp/ftpurl.cxx
@@ -332,7 +332,7 @@ OUString FTPURL::parent(bool internal) const
     if(last.isEmpty())
         bff.append("..");
     else if ( last == ".." )
-        bff.append(last).append("/..");
+        bff.append(last + "/..");
 
     bff.append(m_aType);
     return bff.makeStringAndClear();
diff --git a/unotools/source/config/bootstrap.cxx b/unotools/source/config/bootstrap.cxx
index 98a2ac802f69..ad6202cf1479 100644
--- a/unotools/source/config/bootstrap.cxx
+++ b/unotools/source/config/bootstrap.cxx
@@ -416,15 +416,14 @@ static void addFileError(OUStringBuffer& _rBuf, OUString const& _aPath, AsciiStr
     OUString sSimpleFileName = _aPath.copy(1 +_aPath.lastIndexOf(cURLSeparator));
 
     _rBuf.append("The configuration file");
-    _rBuf.append(" '").append(sSimpleFileName).append("' ");
+    _rBuf.append(" '" + sSimpleFileName + "' ");
     _rBuf.appendAscii(_sWhat).append(PERIOD);
 }
 
 static void addMissingDirectoryError(OUStringBuffer& _rBuf, std::u16string_view _aPath)
 {
-    _rBuf.append("The configuration directory");
-    _rBuf.append(" '").append(_aPath).append("' ");
-    _rBuf.append(IS_MISSING).append(PERIOD);
+    _rBuf.append(OUString::Concat("The configuration directory '") + _aPath + "' " +
+        IS_MISSING + PERIOD);
 }
 
 static void addUnexpectedError(OUStringBuffer& _rBuf, AsciiString _sExtraInfo = nullptr)
diff --git a/unotools/source/config/configpaths.cxx b/unotools/source/config/configpaths.cxx
index 8c206d03a3cd..8c3ee31f2641 100644
--- a/unotools/source/config/configpaths.cxx
+++ b/unotools/source/config/configpaths.cxx
@@ -53,7 +53,7 @@ void lcl_resolveCharEntities(OUString & aLocalString)
         OSL_ENSURE(ch,"Configuration path contains '&' that is not part of a valid character escape");
         if (ch)
         {
-            aResult.append(aLocalString.subView(nStart,nEscapePos-nStart)).append(ch);
+            aResult.append(aLocalString.subView(nStart,nEscapePos-nStart) + OUStringChar(ch));
 
             sal_Int32 nEscapeEnd=aLocalString.indexOf(';',nEscapePos);
             nStart = nEscapeEnd+1;
@@ -245,7 +245,7 @@ OUString lcl_wrapName(const OUString& _sContent, const OUString& _sType)
     OUStringBuffer aNormalized(_sType.getLength() + _sContent.getLength() + 4); // reserve approximate size initially
 
     // prefix: type, opening bracket and quote
-    aNormalized.append( _sType ).append( "['" );
+    aNormalized.append( _sType + "['" );
 
     // content: copy over each char and handle escaping
     for(const sal_Unicode* pCur = pBeginContent; pCur != pEndContent; ++pCur)
diff --git a/unotools/source/i18n/localedatawrapper.cxx b/unotools/source/i18n/localedatawrapper.cxx
index 0565e7f291a2..8c59d0a6267c 100644
--- a/unotools/source/i18n/localedatawrapper.cxx
+++ b/unotools/source/i18n/localedatawrapper.cxx
@@ -1384,13 +1384,13 @@ OUString LocaleDataWrapper::getLongDate( const Date& rDate, CalendarWrapper& rCa
     switch ( getLongDateOrder() )
     {
         case DateOrder::DMY :
-            aStr.append(aDay).append(getLongDateDaySep()).append(aMonth).append(getLongDateMonthSep()).append(aYear);
+            aStr.append(aDay + getLongDateDaySep() + aMonth + getLongDateMonthSep() + aYear);
         break;
         case DateOrder::MDY :
-            aStr.append(aMonth).append(getLongDateMonthSep()).append(aDay).append(getLongDateDaySep()).append(aYear);
+            aStr.append(aMonth + getLongDateMonthSep() + aDay + getLongDateDaySep() + aYear);
         break;
         default:    // YMD
-            aStr.append(aYear).append(getLongDateYearSep()).append(aMonth).append(getLongDateMonthSep()).append(aDay);
+            aStr.append(aYear + getLongDateYearSep() + aMonth + getLongDateMonthSep() + aDay);
     }
     return aStr.makeStringAndClear();
 }
diff --git a/unoxml/source/rdf/librdf_repository.cxx b/unoxml/source/rdf/librdf_repository.cxx
index 85b05260484a..7b4461aca83a 100644
--- a/unoxml/source/rdf/librdf_repository.cxx
+++ b/unoxml/source/rdf/librdf_repository.cxx
@@ -2150,9 +2150,9 @@ librdf_TypeConverter::extractResourceToCacheKey_NoLock(
     }
     uno::Reference< rdf::XBlankNode > xBlankNode(i_xResource, uno::UNO_QUERY);
     if (xBlankNode.is()) {
-        rBuffer.append("BlankNode ").append(xBlankNode->getStringValue());
+        rBuffer.append("BlankNode " + xBlankNode->getStringValue());
     } else { // assumption: everything else is URI
-        rBuffer.append("URI ").append(i_xResource->getStringValue());
+        rBuffer.append("URI " + i_xResource->getStringValue());
     }
 }
 
@@ -2242,10 +2242,10 @@ librdf_TypeConverter::extractNodeToCacheKey_NoLock(
     if (!xLiteral.is()) {
         return;
     }
-    rBuffer.append("Literal ").append(xLiteral->getValue()).append("\t").append(xLiteral->getLanguage());
+    rBuffer.append("Literal " + xLiteral->getValue() + "\t" + xLiteral->getLanguage());
     const uno::Reference< rdf::XURI > xType(xLiteral->getDatatype());
     if (xType.is())
-        rBuffer.append("\t").append(xType->getStringValue());
+        rBuffer.append("\t" + xType->getStringValue());
 }
 
 // create blank or URI or literal node
diff --git a/vcl/skia/gdiimpl.cxx b/vcl/skia/gdiimpl.cxx
index 145bbf19cc4c..f0b9fb2e0d5c 100644
--- a/vcl/skia/gdiimpl.cxx
+++ b/vcl/skia/gdiimpl.cxx
@@ -1627,10 +1627,9 @@ sk_sp<SkImage> SkiaSalGraphicsImpl::mergeCacheBitmaps(const SkiaSalBitmap& bitma
     keyBuf.append(targetSize.Width())
         .append("x")
         .append(targetSize.Height())
-        .append("_")
-        .append(bitmap.GetImageKey());
+        .append("_" + bitmap.GetImageKey());
     if (alphaBitmap)
-        keyBuf.append("_").append(alphaBitmap->GetAlphaImageKey());
+        keyBuf.append("_" + alphaBitmap->GetAlphaImageKey());
     key = keyBuf.makeStringAndClear();
     image = findCachedImage(key);
     if (image)
diff --git a/vcl/source/gdi/pdfobjectcopier.cxx b/vcl/source/gdi/pdfobjectcopier.cxx
index 121eddb8b6de..c9e332aba28f 100644
--- a/vcl/source/gdi/pdfobjectcopier.cxx
+++ b/vcl/source/gdi/pdfobjectcopier.cxx
@@ -230,7 +230,7 @@ OString PDFObjectCopier::copyExternalResources(filter::PDFObjectElement& rPage,
     OStringBuffer sRet("/" + rKind + "<<");
     for (const auto& rPair : aRet)
     {
-        sRet.append("/").append(rPair.first).append(" ").append(rPair.second).append(" 0 R");
+        sRet.append("/" + rPair.first + " ").append(rPair.second).append(" 0 R");
     }
     sRet.append(">>");
 
diff --git a/vcl/source/treelist/transfer.cxx b/vcl/source/treelist/transfer.cxx
index 932cdca68a18..5f57a7ff07b6 100644
--- a/vcl/source/treelist/transfer.cxx
+++ b/vcl/source/treelist/transfer.cxx
@@ -785,9 +785,9 @@ bool TransferableHelper::SetINetBookmark( const INetBookmark& rBmk,
             OString sDesc(OUStringToOString(rBmk.GetDescription(), eSysCSet));
             OStringBuffer sOut;
             sOut.append(sURL.getLength());
-            sOut.append('@').append(sURL);
+            sOut.append("@" + sURL);
             sOut.append(sDesc.getLength());
-            sOut.append('@').append(sDesc);
+            sOut.append("@" + sDesc);
 
             Sequence< sal_Int8 > aSeq(sOut.getLength());
             memcpy(aSeq.getArray(), sOut.getStr(), sOut.getLength());
diff --git a/vcl/source/treelist/treelistbox.cxx b/vcl/source/treelist/treelistbox.cxx
index 9af367f2f460..8fa1ff9bbd0f 100644
--- a/vcl/source/treelist/treelistbox.cxx
+++ b/vcl/source/treelist/treelistbox.cxx
@@ -1296,7 +1296,7 @@ OUString SvTreeListBox::SearchEntryTextWithHeadTitle( SvTreeListEntry* pEntry )
         if ( (rItem.GetType() == SvLBoxItemType::String) &&
              !static_cast<SvLBoxString&>( rItem ).GetText().isEmpty() )
         {
-            sRet.append(static_cast<SvLBoxString&>( rItem ).GetText()).append(",");
+            sRet.append(static_cast<SvLBoxString&>( rItem ).GetText() + ",");
         }
         nCur++;
     }
diff --git a/vcl/source/uitest/logger.cxx b/vcl/source/uitest/logger.cxx
index ffb6b1a8f6c8..8c23eb8b1cb2 100644
--- a/vcl/source/uitest/logger.cxx
+++ b/vcl/source/uitest/logger.cxx
@@ -99,21 +99,21 @@ void UITestLogger::logCommand(const OUString& rAction,
             {
                 sal_Int32 nValue = 0;
                 rProp.Value >>= nValue;
-                aBuffer.append("\"").append(rProp.Name).append("\": ");
+                aBuffer.append("\"" + rProp.Name + "\": ");
                 aBuffer.append(nValue).append(", ");
             }
             else if (aTypeName == "unsigned long")
             {
                 sal_uInt32 nValue = 0;
                 rProp.Value >>= nValue;
-                aBuffer.append("\"").append(rProp.Name).append("\": ");
+                aBuffer.append("\"" + rProp.Name + "\": ");
                 aBuffer.append(static_cast<sal_Int64>(nValue)).append(", ");
             }
             else if (aTypeName == "boolean")
             {
                 bool bValue = false;
                 rProp.Value >>= bValue;
-                aBuffer.append("\"").append(rProp.Name).append("\": ");
+                aBuffer.append("\"" + rProp.Name + "\": ");
                 if (bValue)
                     aBuffer.append("True, ");
                 else
@@ -333,11 +333,7 @@ OUString StringMapToOUString(const std::map<OUString, OUString>& rParameters)
     {
         if (itr != rParameters.begin())
             aParameterString.append(", ");
-        aParameterString.append("\"")
-            .append(itr->first)
-            .append("\": \"")
-            .append(itr->second)
-            .append("\"");
+        aParameterString.append("\"" + itr->first + "\": \"" + itr->second + "\"");
     }
 
     aParameterString.append("}");
diff --git a/vcl/source/uitest/uiobject.cxx b/vcl/source/uitest/uiobject.cxx
index 11c6e7ec7d6e..6861cd1bdfc3 100644
--- a/vcl/source/uitest/uiobject.cxx
+++ b/vcl/source/uitest/uiobject.cxx
@@ -370,7 +370,7 @@ void WindowUIObject::execute(const OUString& rAction,
         {
             OStringBuffer buf;
             for (auto const & rPair : rParameters)
-                buf.append(",").append(rPair.first.toUtf8()).append("=").append(rPair.second.toUtf8());
+                buf.append("," + rPair.first.toUtf8() + "=" + rPair.second.toUtf8());
             SAL_WARN("vcl.uitest", "missing parameter TEXT to action TYPE "
                 << buf.makeStringAndClear());
             throw std::logic_error("missing parameter TEXT to action TYPE");
@@ -384,7 +384,7 @@ void WindowUIObject::execute(const OUString& rAction,
     {
         OStringBuffer buf;
         for (auto const & rPair : rParameters)
-            buf.append(",").append(rPair.first.toUtf8()).append("=").append(rPair.second.toUtf8());
+            buf.append("," + rPair.first.toUtf8() + "=" + rPair.second.toUtf8());
         SAL_WARN("vcl.uitest", "unknown action for " << get_name()
             << ". Action: " << rAction << buf.makeStringAndClear());
         throw std::logic_error("unknown action");
diff --git a/xmloff/source/forms/elementimport.cxx b/xmloff/source/forms/elementimport.cxx
index 06d69218e294..8c94cd738c65 100644
--- a/xmloff/source/forms/elementimport.cxx
+++ b/xmloff/source/forms/elementimport.cxx
@@ -226,9 +226,9 @@ namespace xmloff
             for ( const auto& rCheck : m_aValues )
             {
                 OSL_ENSURE(m_xInfo->hasPropertyByName(rCheck.Name),
-                        OStringBuffer("OElementImport::implApplySpecificProperties: read a property (").
-                    append(OUStringToOString(rCheck.Name, RTL_TEXTENCODING_ASCII_US)).
-                    append(") which does not exist on the element!").getStr());
+                        OStringBuffer("OElementImport::implApplySpecificProperties: read a property (" +
+                            OUStringToOString(rCheck.Name, RTL_TEXTENCODING_ASCII_US) +
+                            ") which does not exist on the element!").getStr());
             }
         }
 #endif
@@ -286,9 +286,9 @@ namespace xmloff
             catch(const Exception&)
             {
                 DBG_UNHANDLED_EXCEPTION("xmloff.forms");
-                OSL_FAIL(OStringBuffer("OElementImport::implApplySpecificProperties: could not set the property \"").
-                    append(OUStringToOString(rPropValues.Name, RTL_TEXTENCODING_ASCII_US)).
-                    append("\"!").getStr());
+                OSL_FAIL(OStringBuffer("OElementImport::implApplySpecificProperties: could not set the property \"" +
+                        OUStringToOString(rPropValues.Name, RTL_TEXTENCODING_ASCII_US) +
+                        "\"!").getStr());
             }
         }
     }
@@ -430,9 +430,9 @@ namespace xmloff
             catch(const Exception&)
             {
                 DBG_UNHANDLED_EXCEPTION("xmloff.forms");
-                OSL_FAIL(OStringBuffer("OElementImport::EndElement: could not set the property \"").
-                    append(OUStringToOString(rPropValues.Name, RTL_TEXTENCODING_ASCII_US)).
-                    append("\"!").getStr());
+                OSL_FAIL(OStringBuffer("OElementImport::EndElement: could not set the property \"" +
+                            OUStringToOString(rPropValues.Name, RTL_TEXTENCODING_ASCII_US) +
+                            "\"!").getStr());
             }
         }
     }
@@ -562,7 +562,9 @@ namespace xmloff
             Reference< XComponentContext > xContext = m_rFormImport.getGlobalContext().GetComponentContext();
             Reference< XInterface > xPure = xContext->getServiceManager()->createInstanceWithContext(m_sServiceName, xContext);
             OSL_ENSURE(xPure.is(),
-                        OStringBuffer("OElementImport::createElement: service factory gave me no object (service name: ").append(OUStringToOString(m_sServiceName, RTL_TEXTENCODING_ASCII_US)).append(")!").getStr());
+                        OStringBuffer("OElementImport::createElement: service factory gave me no object (service name: " +
+                            OUStringToOString(m_sServiceName, RTL_TEXTENCODING_ASCII_US) +
+                            ")!").getStr());
             xReturn.set(xPure, UNO_QUERY);
         }
         else
diff --git a/xmloff/source/forms/layerimport.cxx b/xmloff/source/forms/layerimport.cxx
index 6039a1e303f0..40845d735a64 100644
--- a/xmloff/source/forms/layerimport.cxx
+++ b/xmloff/source/forms/layerimport.cxx
@@ -324,7 +324,9 @@ const SvXMLStyleContext* OFormLayerXMLImport_Impl::getStyleElement(const OUStrin
     const SvXMLStyleContext* pControlStyle =
         m_xAutoStyles.is() ? m_xAutoStyles->FindStyleChildContext( XmlStyleFamily::TEXT_PARAGRAPH, _rStyleName ) : nullptr;
     OSL_ENSURE( pControlStyle || !m_xAutoStyles.is(),
-                OStringBuffer("OFormLayerXMLImport_Impl::getStyleElement: did not find the style named \"").append(OUStringToOString(_rStyleName, RTL_TEXTENCODING_ASCII_US)).append("\"!").getStr() );
+                OStringBuffer("OFormLayerXMLImport_Impl::getStyleElement: did not find the style named \"" +
+                    OUStringToOString(_rStyleName, RTL_TEXTENCODING_ASCII_US) +
+                    "\"!").getStr() );
     return pControlStyle;
 }
 
diff --git a/xmloff/source/forms/propertyimport.cxx b/xmloff/source/forms/propertyimport.cxx
index ce1293baafea..ded9fa8565b1 100644
--- a/xmloff/source/forms/propertyimport.cxx
+++ b/xmloff/source/forms/propertyimport.cxx
@@ -100,9 +100,9 @@ Any PropertyConversion::convertString( const css::uno::Type& _rExpectedType,
             bool bSuccess =
                 ::sax::Converter::convertBool(bValue, _rReadCharacters);
             OSL_ENSURE(bSuccess,
-                    OStringBuffer("PropertyConversion::convertString: could not convert \"").
-                append(OUStringToOString(_rReadCharacters, RTL_TEXTENCODING_ASCII_US)).
-                append("\" into a boolean!").getStr());
+                    OStringBuffer("PropertyConversion::convertString: could not convert \"" +
+                        OUStringToOString(_rReadCharacters, RTL_TEXTENCODING_ASCII_US) +
+                        "\" into a boolean!").getStr());
             aReturn <<= (_bInvertBoolean ? !bValue : bValue);
         }
         break;
@@ -114,9 +114,9 @@ Any PropertyConversion::convertString( const css::uno::Type& _rExpectedType,
                 bool bSuccess =
                     ::sax::Converter::convertNumber(nValue, _rReadCharacters);
                 OSL_ENSURE(bSuccess,
-                        OStringBuffer("PropertyConversion::convertString: could not convert \"").
-                    append(OUStringToOString(_rReadCharacters, RTL_TEXTENCODING_ASCII_US)).
-                    append("\" into an integer!").getStr());
+                        OStringBuffer("PropertyConversion::convertString: could not convert \"" +
+                            OUStringToOString(_rReadCharacters, RTL_TEXTENCODING_ASCII_US) +
+                            "\" into an integer!").getStr());
                 if (TypeClass_SHORT == _rExpectedType.getTypeClass())
                     aReturn <<= static_cast<sal_Int16>(nValue);
                 else
@@ -151,9 +151,9 @@ Any PropertyConversion::convertString( const css::uno::Type& _rExpectedType,
             bool bSuccess =
                 ::sax::Converter::convertDouble(nValue, _rReadCharacters);
             OSL_ENSURE(bSuccess,
-                    OStringBuffer("PropertyConversion::convertString: could not convert \"").
-                append(OUStringToOString(_rReadCharacters, RTL_TEXTENCODING_ASCII_US)).
-                append("\" into a double!").getStr());
+                    OStringBuffer(OString::Concat("PropertyConversion::convertString: could not convert \"") +
+                        OUStringToOString(_rReadCharacters, RTL_TEXTENCODING_ASCII_US) +
+                        "\" into a double!").getStr());
             aReturn <<= nValue;
         }
         break;
@@ -177,9 +177,9 @@ Any PropertyConversion::convertString( const css::uno::Type& _rExpectedType,
                 bool bSuccess =
                     ::sax::Converter::convertDouble(nValue, _rReadCharacters);
                 OSL_ENSURE(bSuccess,
-                        OStringBuffer("PropertyConversion::convertString: could not convert \"").
-                    append(OUStringToOString(_rReadCharacters, RTL_TEXTENCODING_ASCII_US)).
-                    append("\" into a double!").getStr());
+                        OStringBuffer("PropertyConversion::convertString: could not convert \"" +
+                            OUStringToOString(_rReadCharacters, RTL_TEXTENCODING_ASCII_US) +
+                            "\" into a double!").getStr());
 
                 // then convert it into the target type
                 switch (nType)
diff --git a/xmloff/source/style/xmlexppr.cxx b/xmloff/source/style/xmlexppr.cxx
index 291c2ee36041..bd3ee809ec1a 100644
--- a/xmloff/source/style/xmlexppr.cxx
+++ b/xmloff/source/style/xmlexppr.cxx
@@ -1005,7 +1005,7 @@ void SvXMLExportPropertyMapper::_exportXML(
                                 sPrefix = pNamespaceMap->GetPrefixByKey( nKey );
                             }
                             // In any case, the attribute name has to be adapted.
-                            sNameBuffer.append(sPrefix).append(":").append(rAttribName.subView(nColonPos+1));
+                            sNameBuffer.append(sPrefix + ":" + rAttribName.subView(nColonPos+1));
                             sAttribName = sNameBuffer.makeStringAndClear();
                         }
 
@@ -1017,9 +1017,8 @@ void SvXMLExportPropertyMapper::_exportXML(
                                 pNamespaceMap = pNewNamespaceMap.get();
                             }
                             pNewNamespaceMap->Add( sPrefix, sNamespace );
-                            sNameBuffer.append( GetXMLToken(XML_XMLNS) ).append( ":" ).append( sPrefix );
-                            rAttrList.AddAttribute( sNameBuffer.makeStringAndClear(),
-                                                    sNamespace );
+                            OUString sAttr = GetXMLToken(XML_XMLNS) + ":" + sPrefix;
+                            rAttrList.AddAttribute( sAttr, sNamespace );
                         }
                     }
                 }
diff --git a/xmloff/source/style/xmlnumfi.cxx b/xmloff/source/style/xmlnumfi.cxx
index 8bfaf4d35464..a62133cfff99 100644
--- a/xmloff/source/style/xmlnumfi.cxx
+++ b/xmloff/source/style/xmlnumfi.cxx
@@ -1857,7 +1857,7 @@ void SvXMLNumFormatContext::AddCurrency( const OUString& rContent, LanguageType
         if ( nLang != LANGUAGE_SYSTEM )
         {
             //  '-' sign and language code in hex:
-            aFormatCode.append("-").append(OUString(OUString::number(sal_uInt16(nLang), 16)).toAsciiUpperCase());
+            aFormatCode.append("-" + OUString(OUString::number(sal_uInt16(nLang), 16)).toAsciiUpperCase());
         }
 
         aFormatCode.append( ']' );    // end of "new" currency symbol
@@ -1885,7 +1885,7 @@ void SvXMLNumFormatContext::AddNfKeyword( sal_uInt16 nIndex )
         if ( !bTruncate && !bHasDateTime )
         {
             //  with truncate-on-overflow = false, add "[]" to first time part
-            aFormatCode.append("[").append(sKeyword).append("]");
+            aFormatCode.append("[" + sKeyword + "]");
         }
         else
         {
@@ -2011,7 +2011,7 @@ void SvXMLNumFormatContext::AddCondition( const sal_Int32 nIndex )
                 sRealCond = sRealCond.replaceAt( nPos, 1, rDecSep );
             }
         }
-        aConditions.append("[").append(sRealCond).append("]");
+        aConditions.append("[" + sRealCond + "]");
     }
 
     const SvNumberformat* pFormat = pFormatter->GetEntry(l_nKey);
diff --git a/xmlsecurity/source/framework/saxeventkeeperimpl.cxx b/xmlsecurity/source/framework/saxeventkeeperimpl.cxx
index 41b0a89b57ad..738fec308546 100644
--- a/xmlsecurity/source/framework/saxeventkeeperimpl.cxx
+++ b/xmlsecurity/source/framework/saxeventkeeperimpl.cxx
@@ -295,15 +295,15 @@ OUString SAXEventKeeperImpl::printBufferNode(
         rc.append("[B]");
     }
 
-    rc.append(" ").append(m_xXMLDocument->getNodeName(pBufferNode->getXMLElement()));
+    rc.append(" " + m_xXMLDocument->getNodeName(pBufferNode->getXMLElement()));
 
     BufferNode* pParent = const_cast<BufferNode*>(pBufferNode->getParent());
     if (pParent != nullptr)
     {
-        rc.append("[").append(m_xXMLDocument->getNodeName(pParent->getXMLElement())).append("]");
+        rc.append("[" + m_xXMLDocument->getNodeName(pParent->getXMLElement()) + "]");
     }
 
-    rc.append(":EC=").append(pBufferNode->printChildren()).append(" BR=");
+    rc.append(":EC=" + pBufferNode->printChildren() + " BR=");
 
     ElementMark * pBlocker = pBufferNode->getBlocker();
     if (pBlocker != nullptr)