const union value *current_value = case_data (c, cdr->key);
const int key_width = var_get_width (cdr->key);
const double weight = cdr->weight ? case_data (c, cdr->weight)->f : 1.0;
const struct ccase *next_case = casereader_peek (cdr->clone, cdr->n + 1);
const union value *current_value = case_data (c, cdr->key);
const int key_width = var_get_width (cdr->key);
const double weight = cdr->weight ? case_data (c, cdr->weight)->f : 1.0;
const struct ccase *next_case = casereader_peek (cdr->clone, cdr->n + 1);