[protobuf] Question about set_allocated_foo/release_foo

[Kevin Regan]

I often have situations like this:

void do_something(const std::string& value)
{
       my_proto_buffer.set_value(value);
       // serialize my_proto_buffer to a stream
}

Would it be valid to do this:

void do_something(const std::string& value)
{
       my_proto_buffer.set_allocated_value(&((std::string&)value));
       try {
           // serialize my_proto_buffer to a stream
       }
       catch (...) {
            my_proto_buffer.release_value()
            throw;
       }
       my_proto_buffer.release_value();
}

or can I not rely on the internal string not being modified during 
serialization?

Thanks,
Kevin

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