Fix uses of char16_t*/wchar_t* stream inserters

...that are helpfully deleted in C++20, as now implemented at least by VS 2019
16.6.4 when using --with-latest-c++

Change-Id: Iaf80f793e73fc90768bb146c9cf3d300d6747c8c
Reviewed-on: https://gerrit.libreoffice.org/c/core/+/99170
Tested-by: Jenkins
Reviewed-by: Stephan Bergmann <sbergman@redhat.com>

basic/source/runtime/methods.cxx

@@ -367,9 +367,10 @@ extern "C" void invalidParameterHandler(
 {
     SAL_INFO(
         "basic",
-        "invalid parameter during _wgetdcwd; \"" << (expression ? o3tl::toU(expression) : u"???")
-            << "\" (" << (function ? o3tl::toU(function) : u"???") << ") at "
-            << (file ? o3tl::toU(file) : u"???") << ":" << line);
+        "invalid parameter during _wgetdcwd; \""
+            << (expression ? OUString(o3tl::toU(expression)) : OUString("???"))
+            << "\" (" << (function ? OUString(o3tl::toU(function)) : OUString("???")) << ") at "
+            << (file ? OUString(o3tl::toU(file)) : OUString("???")) << ":" << line);
 }
 
 }

extensions/source/ole/unoobjw.cxx

@@ -1162,7 +1162,7 @@ COM_DECLSPEC_NOTHROW STDMETHODIMP InterfaceOleWrapper::GetIDsOfNames(REFIID /*ri
         // Initialise returned rgdispid values.
         rgdispid[i] = DISPID_UNKNOWN;
 
-        SAL_INFO("extensions.olebridge", " " << o3tl::toU(rgszNames[i]));
+        SAL_INFO("extensions.olebridge", " " << OUString(o3tl::toU(rgszNames[i])));
     }
 
     HRESULT ret = DISP_E_UNKNOWNNAME;

include/comphelper/windowsdebugoutput.hxx

@@ -487,7 +487,8 @@ inline std::basic_ostream<charT, traits>& operator<<(std::basic_ostream<charT, t
         case VT_SAFEARRAY:
             break; // FIXME
         case VT_LPSTR:
-            stream << rVariant.bstrVal;
+            stream << std::wstring_convert<std::codecvt_utf8<wchar_t>, wchar_t>().to_bytes(
+                rVariant.bstrVal);
             break;
         case VT_LPWSTR:
             stream << std::wstring_convert<std::codecvt_utf8<wchar_t>, wchar_t>().to_bytes(

tools/qa/cppunit/test_pathutils.cxx

@@ -33,7 +33,7 @@ void buildPath(
     wchar_t p[MAX_PATH];
     wchar_t * e = tools::buildPath(
         p, front, front + std::wcslen(front), back, std::wcslen(back));
-    CPPUNIT_ASSERT_EQUAL(p + std::wcslen(path), e);
+    CPPUNIT_ASSERT_EQUAL(static_cast<void *>(p + std::wcslen(path)), static_cast<void *>(e));
     CPPUNIT_ASSERT_EQUAL(0, std::wcscmp(path, p));
 #else
     (void) front;