compilerplugins/clang/stringview.cxx               |   10 ++++++++--
 compilerplugins/clang/test/stringview-c++03.cxx    |   21 +++++++++++++++++++++
 compilerplugins/clang/test/stringview.cxx          |    8 ++++++++
 linguistic/source/hyphdsp.cxx                      |    2 +-
 sc/source/core/tool/compiler.cxx                   |    2 +-
 solenv/CompilerTest_compilerplugins_clang-c++03.mk |   20 ++++++++++++++++++++
 solenv/Module_solenv.mk                            |    1 +
 solenv/gbuild/CompilerTest.mk                      |    2 ++
 svl/source/numbers/zforlist.cxx                    |    4 ++--
 9 files changed, 64 insertions(+), 6 deletions(-)

New commits:
commit c6db02a2afe4263e060fe6166db8e5426dd2ecd1
Author:     Stephan Bergmann <sberg...@redhat.com>
AuthorDate: Wed Feb 16 18:15:46 2022 +0100
Commit:     Stephan Bergmann <sberg...@redhat.com>
CommitDate: Wed Feb 16 22:45:42 2022 +0100

    Extend loplugin:stringview to OUStringBuffer::copy
    
    (Somewhat oddly, there is no OStringBuffer::copy counterpart.)
    
    This required some modification to StringView::VisitCXXConstructExpr to 
avoid
    
    > In file included from odk/qa/checkapi/checkapi.cxx:29:
    > In file included from 
workdir/CustomTarget/odk/allheaders/allheaders.hxx:351:
    > In file included from instdir/sdk/include/rtl/math.hxx:31:
    > instdir/sdk/include/rtl/ustrbuf.hxx:1687:16: error: rather than copy, 
pass with a view using subView() [loplugin:stringview]
    >         return copy( beginIndex, getLength() - beginIndex );
    >                ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
    
    while building CppunitTest_odk_checkapi as external C++03 code, where the
    returned value is wrapped in a CXXConstructExpr.  And testing for that case
    required a new CompilerTest_compilerplugins_clang-c++03 that uses 
gb_CXX03FLAGS
    and needs to not set LIBO_INTERNAL_ONLY (via 
gb_CompilerTest_set_external_code),
    as compiling as C++03 would otherwise generate lots of errors like unknown
    char16_t at include/sal/types.h:118.  (There was a choice whether to name 
the
    new test "-c++03" or "-external", but the issue it tests is caused more by 
the
    code being compiled with C++03 than by this being external code, see above.)
    
    Change-Id: I873a9c5a70d3ea949cf13a169d46920b71282712
    Reviewed-on: https://gerrit.libreoffice.org/c/core/+/130036
    Tested-by: Jenkins
    Reviewed-by: Stephan Bergmann <sberg...@redhat.com>

diff --git a/compilerplugins/clang/stringview.cxx 
b/compilerplugins/clang/stringview.cxx
index 4c31c348b357..c81b04ebace5 100644
--- a/compilerplugins/clang/stringview.cxx
+++ b/compilerplugins/clang/stringview.cxx
@@ -134,7 +134,8 @@ void StringView::handleSubExprThatCouldBeView(Expr const* 
subExpr)
     auto const e = e0->IgnoreParens();
     auto const tc = loplugin::TypeCheck(e->getType());
     if (!(tc.Class("OString").Namespace("rtl").GlobalNamespace()
-          || tc.Class("OUString").Namespace("rtl").GlobalNamespace()))
+          || tc.Class("OUString").Namespace("rtl").GlobalNamespace()
+          || tc.Class("OUStringBuffer").Namespace("rtl").GlobalNamespace()))
     {
         return;
     }
@@ -272,7 +273,8 @@ void StringView::handleCXXMemberCallExpr(CXXMemberCallExpr 
const* expr)
     if (auto const dc2 = dc1.Function("copy"))
     {
         if (dc2.Class("OString").Namespace("rtl").GlobalNamespace()
-            || dc2.Class("OUString").Namespace("rtl").GlobalNamespace())
+            || dc2.Class("OUString").Namespace("rtl").GlobalNamespace()
+            || dc2.Class("OUStringBuffer").Namespace("rtl").GlobalNamespace())
         {
             report(DiagnosticsEngine::Warning, "rather than copy, pass with a 
view using subView()",
                    expr->getExprLoc())
@@ -343,6 +345,10 @@ bool StringView::VisitCXXConstructExpr(CXXConstructExpr 
const* expr)
     {
         return true;
     }
+    if (!compat::CPlusPlus17(compiler.getLangOpts()) && expr->isElidable()) // 
external C++03 code
+    {
+        return true;
+    }
     if (expr->getNumArgs() > 0)
         handleSubExprThatCouldBeView(expr->getArg(0));
     return true;
diff --git a/compilerplugins/clang/test/stringview-c++03.cxx 
b/compilerplugins/clang/test/stringview-c++03.cxx
new file mode 100644
index 000000000000..1824ac9d02ce
--- /dev/null
+++ b/compilerplugins/clang/test/stringview-c++03.cxx
@@ -0,0 +1,21 @@
+/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4; 
fill-column: 100 -*- */
+/*
+ * This file is part of the LibreOffice project.
+ *
+ * This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/.
+ */
+
+#include <sal/config.h>
+
+#include <rtl/ustrbuf.hxx>
+
+// expected-no-diagnostics
+
+rtl::OUStringBuffer nowarn(rtl::OUStringBuffer const& s, sal_Int32 n)
+{
+    return s.copy(n, s.getLength() - n);
+}
+
+/* vim:set shiftwidth=4 softtabstop=4 expandtab cinoptions=b1,g0,N-s 
cinkeys+=0=break: */
diff --git a/compilerplugins/clang/test/stringview.cxx 
b/compilerplugins/clang/test/stringview.cxx
index 16e294a6eeb7..a679ec59ea45 100644
--- a/compilerplugins/clang/test/stringview.cxx
+++ b/compilerplugins/clang/test/stringview.cxx
@@ -61,6 +61,14 @@ void f1(OString s1)
 }
 void f1(OUStringBuffer s1)
 {
+    // expected-error@+1 {{rather than copy, pass with a view using subView() 
[loplugin:stringview]}}
+    call_view(s1.copy(1, 2));
+    // expected-error@+1 {{rather than copy, pass with a view using subView() 
[loplugin:stringview]}}
+    call_view(s1.copy(1));
+    // expected-error@+1 {{rather than copy, pass with a view using subView() 
[loplugin:stringview]}}
+    ConstructWithView(s1.copy(1, 2));
+    // expected-error@+1 {{rather than copy, pass with a view using subView() 
[loplugin:stringview]}}
+    ConstructWithView(s1.copy(1));
     // expected-error@+1 {{rather than call toString, pass with a view 
[loplugin:stringview]}}
     call_view(s1.toString());
     // expected-error@+1 {{rather than call toString, pass with a view 
[loplugin:stringview]}}
diff --git a/linguistic/source/hyphdsp.cxx b/linguistic/source/hyphdsp.cxx
index 17c0bff0e872..6113960d4c9e 100644
--- a/linguistic/source/hyphdsp.cxx
+++ b/linguistic/source/hyphdsp.cxx
@@ -158,7 +158,7 @@ Reference<XHyphenatedWord>  
HyphenatorDispatcher::buildHyphWord(
                         OUStringBuffer aTmp2 ( aTmp.copy(0, std::max 
(nHyphenationPos + 1 - split, 0) ) );
                         aTmp2.append( aText.subView( nOrigHyphPos + 1, 
endhyphpat - nOrigHyphPos - 1) );
                         nHyphenPos = aTmp2.getLength();
-                        aTmp2.append( aTmp.copy( nHyphenationPos + 1 ) );
+                        aTmp2.append( aTmp.subView( nHyphenationPos + 1 ) );
                         //! take care of #i22591#
                         if (rOrigWord[ rOrigWord.getLength() - 1 ] == '.')
                             aTmp2.append( '.' );
diff --git a/sc/source/core/tool/compiler.cxx b/sc/source/core/tool/compiler.cxx
index 6b8c4f8b2fad..61fa95ca5f87 100644
--- a/sc/source/core/tool/compiler.cxx
+++ b/sc/source/core/tool/compiler.cxx
@@ -1574,7 +1574,7 @@ struct ConventionXL_OOX : public ConventionXL_A1
         {
             rBuffer.append('\'');
             ConventionXL_OOX::makeExternalDocStr( rBuffer, nFileId);
-            rBuffer.append( aBuf.copy(1));
+            rBuffer.append( aBuf.subView(1));
         }
         else
         {
diff --git a/solenv/CompilerTest_compilerplugins_clang-c++03.mk 
b/solenv/CompilerTest_compilerplugins_clang-c++03.mk
new file mode 100644
index 000000000000..8abe032203a0
--- /dev/null
+++ b/solenv/CompilerTest_compilerplugins_clang-c++03.mk
@@ -0,0 +1,20 @@
+# -*- Mode: makefile-gmake; tab-width: 4; indent-tabs-mode: t; fill-column: 
100 -*-
+#
+# This file is part of the LibreOffice project.
+#
+# This Source Code Form is subject to the terms of the Mozilla Public
+# License, v. 2.0. If a copy of the MPL was not distributed with this
+# file, You can obtain one at http://mozilla.org/MPL/2.0/.
+#
+
+$(eval $(call gb_CompilerTest_CompilerTest,compilerplugins_clang-c++03))
+
+$(eval $(call 
gb_CompilerTest_add_exception_objects,compilerplugins_clang-c++03, \
+    compilerplugins/clang/test/stringview-c++03 \
+))
+
+$(eval $(call 
gb_CompilerTest_add_cxxflags,compilerplugins_clang-c++03,$(gb_CXX03FLAGS)))
+
+$(eval $(call gb_CompilerTest_set_external_code,compilerplugins_clang-c++03))
+
+# vim: set noet sw=4 ts=4:
diff --git a/solenv/Module_solenv.mk b/solenv/Module_solenv.mk
index a26775f71083..6b9f7d0f1a8c 100644
--- a/solenv/Module_solenv.mk
+++ b/solenv/Module_solenv.mk
@@ -45,6 +45,7 @@ ifneq ($(COMPILER_PLUGINS),)
 ifeq ($(COMPILER_EXTERNAL_TOOL)$(COMPILER_PLUGIN_TOOL),)
 $(eval $(call gb_Module_add_check_targets,solenv, \
     CompilerTest_compilerplugins_clang \
+    CompilerTest_compilerplugins_clang-c++03 \
 ))
 endif
 endif
diff --git a/solenv/gbuild/CompilerTest.mk b/solenv/gbuild/CompilerTest.mk
index ad6c55411f19..fb5150f2cdf0 100644
--- a/solenv/gbuild/CompilerTest.mk
+++ b/solenv/gbuild/CompilerTest.mk
@@ -45,6 +45,8 @@ gb_CompilerTest_add_objcxxobject = $(call 
gb_CompilerTest__forward_to_Linktarget
 gb_CompilerTest_add_objcxxobjects = $(call 
gb_CompilerTest__forward_to_Linktarget,$(0),$(1),$(2),$(3))
 gb_CompilerTest_add_cxxclrobject = $(call 
gb_CompilerTest__forward_to_Linktarget,$(0),$(1),$(2),$(3))
 gb_CompilerTest_add_cxxclrobjects = $(call 
gb_CompilerTest__forward_to_Linktarget,$(0),$(1),$(2),$(3))
+gb_CompilerTest_add_cxxflags = $(call 
gb_CompilerTest__forward_to_Linktarget,$(0),$(1),$(2),$(3))
+gb_CompilerTest_set_external_code = $(call 
gb_CompilerTest__forward_to_Linktarget,$(0),$(1),$(2),$(3))
 gb_CompilerTest_use_externals = $(call 
gb_CompilerTest__forward_to_Linktarget,$(0),$(1),$(2),$(3))
 gb_CompilerTest_use_udk_api = $(call 
gb_CompilerTest__forward_to_Linktarget,$(0),$(1),$(2),$(3))
 
diff --git a/svl/source/numbers/zforlist.cxx b/svl/source/numbers/zforlist.cxx
index 98f607e6f07a..8606a4a24226 100644
--- a/svl/source/numbers/zforlist.cxx
+++ b/svl/source/numbers/zforlist.cxx
@@ -3231,9 +3231,9 @@ OUString SvNumberFormatter::GenerateFormat(sal_uInt32 
nIndex,
       {
         sal_Int32 nIndexSep = ImpPosToken( sOldFormatString, ';', nIndexE );
         if (nIndexSep > nIndexE)
-            sString.append( sOldFormatString.copy(nIndexE, nIndexSep - 
nIndexE) );
+            sString.append( sOldFormatString.subView(nIndexE, nIndexSep - 
nIndexE) );
         else
-            sString.append( sOldFormatString.copy(nIndexE) );
+            sString.append( sOldFormatString.subView(nIndexE) );
       }
     }
     else if (eType == SvNumFormatType::CURRENCY)

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