/*
 *  call-seq:
 *     index_reader.term_docs_for(field, term) -> TermDocEnum
 *
 *  Builds a TermDocEnum to iterate through the documents that contain the
 *  term +term+ in the field +field+. See TermDocEnum for more info.
 */
static VALUE
frt_ir_term_docs_for(VALUE self, VALUE rfield, VALUE rterm)
{
    IndexReader *ir = (IndexReader *)DATA_PTR(self);
    return frt_get_tde(self, ir_term_docs_for(ir,
                                              frt_field(rfield),
                                              StringValuePtr(rterm)));
}