comphelper: Allow initializer lists for Sequences of NamedValues.

This is particularly useful for creation of sequences that are later
unwrapped using comphelper::SequenceAsHashMap.

Eg.

    uno::Sequence<uno::Any> aArguments(comphelper::InitAnySequence(
    {
        {"SomethingNamed", uno::makeAny(true)},
    }));

    Reference<XExporter> xExporter(aFactory->createInstanceWithArguments(..., aArguments), UNO_QUERY);

and in the implementation where the arguments are consumed:

    comphelper::SequenceAsHashMap aArgumentsMap(rArguments);
    mbSomething = aArgumentsMap.getUnpackedValueOrDefault("SomethingNamed", false);

Change-Id: Ib1135078a99ca08f50bf51184f2ec7d13f5e6b4d
Reviewed-on: https://gerrit.libreoffice.org/40201Reviewed-by: Jan Holesovsky <kendy@collabora.com>
Tested-by: Jan Holesovsky <kendy@collabora.com>

include/comphelper/propertysequence.hxx

@@ -14,10 +14,12 @@
 #include <initializer_list>
 #include <com/sun/star/uno/Any.hxx>
 #include <com/sun/star/uno/Sequence.hxx>
+#include <com/sun/star/beans/NamedValue.hpp>
 #include <com/sun/star/beans/PropertyValue.hpp>
 
 namespace comphelper
 {
+    /// Init list for property sequences.
     inline css::uno::Sequence< css::beans::PropertyValue > InitPropertySequence(
         ::std::initializer_list< ::std::pair< OUString, css::uno::Any > > vInit)
     {
@@ -33,6 +35,23 @@ namespace comphelper
         }
         return vResult;
     }
+
+    /// Init list for property sequences that wrap the NamedValues in Anys.
+    ///
+    /// This is particularly useful for creation of sequences that are later
+    /// unwrapped using comphelper::SequenceAsHashMap.
+    inline css::uno::Sequence< css::uno::Any > InitAnySequence(
+        ::std::initializer_list< ::std::pair< OUString, css::uno::Any > > vInit)
+    {
+        css::uno::Sequence<css::uno::Any> vResult{static_cast<sal_Int32>(vInit.size())};
+        size_t nCount{0};
+        for(const auto& aEntry : vInit)
+        {
+            vResult[nCount] <<= css::beans::NamedValue(aEntry.first, aEntry.second);
+            ++nCount;
+        }
+        return vResult;
+    }
 }   // namespace comphelper