On Wed, Oct 23, 2013 at 8:01 AM, Ivan L <abys...@gmail.com> wrote: > I have a code like: > > > TestMessage* output; > ::google::protobuf::Message* input; > auto reflection = output->GetReflection(); > > ... > auto extension_field = input->GetDescriptor->extension(i); > ... > > auto output_field = > reflection->FindKnownExtensionByName(extension_field->full_name()); > reflection->MutableMessage(output, output_field)->CopyFrom(*input); > > > How can I do a setting of preallocated `input` without copying - in last > statement? > You can use Swap() rather than CopyFrom() to avoid the copy.
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