QSQL: Getting a list of placeholders to bind, prior to binding

It would be good if it was possible to have the list of placeholders to bind, prior to binding.
Right now you can only retrieve the already bound values.

Apparently this is available from SQLite, when compiled with the proper
switch:

http://www.sqlite.org/c3ref/bind_parameter_count.html
http://www.sqlite.org/c3ref/bind_parameter_name.html
http://www.sqlite.org/c3ref/bind_parameter_index.html