+ continue;
+ }
+ else if (at == CTAT_LAYERROW && a == PIVOT_AXIS_COLUMN && t->label_axis[a] != a)
+ {
+ for (size_t k = nest->n - 1; k < nest->n; k--)
+ {
+ if (k == nest->scale_idx)
+ continue;
+ nest->areas[at][nest->n_areas[at]++] = k;
+ break;
+ }
+ continue;
+ }
+ else if (at == CTAT_LAYER && t->label_axis[a] == PIVOT_AXIS_LAYER)
+ {
+ for (size_t k = nest->n - 1; k < nest->n; k--)
+ {
+ if (k == nest->scale_idx)
+ continue;
+ nest->areas[at][nest->n_areas[at]++] = k;
+ break;
+ }
+ continue;
+ }
+
+ size_t n_drop;
+ if (at == CTAT_SUBTABLE && t->label_axis[PIVOT_AXIS_ROW] == PIVOT_AXIS_COLUMN)
+ {
+ n_drop = (a == PIVOT_AXIS_LAYER ? 0
+ : a == PIVOT_AXIS_ROW ? 2
+ : 0);
+ }
+ else if (at == CTAT_SUBTABLE && t->label_axis[PIVOT_AXIS_COLUMN] == PIVOT_AXIS_ROW)
+ {
+ n_drop = (a == PIVOT_AXIS_LAYER ? 0
+ : a == PIVOT_AXIS_COLUMN ? 2
+ : 0);
+ }
+ else if (at == CTAT_SUBTABLE && t->label_axis[PIVOT_AXIS_ROW] == PIVOT_AXIS_LAYER)
+ {
+ if (a == PIVOT_AXIS_COLUMN)
+ n_drop = 1;
+ else
+ {
+ if (a == PIVOT_AXIS_ROW)
+ {
+ size_t n = nest->n_areas[at];
+ if (n > 1)
+ {
+ nest->areas[at][n - 2] = nest->areas[at][n - 1];
+ nest->n_areas[at]--;
+ }
+ }
+ continue;
+ }
+ }
+ else if (at == CTAT_SUBTABLE && t->label_axis[PIVOT_AXIS_COLUMN] == PIVOT_AXIS_LAYER)
+ {
+ if (a == PIVOT_AXIS_ROW)
+ n_drop = 1;
+ else
+ {
+ if (a == PIVOT_AXIS_COLUMN)
+ {
+ size_t n = nest->n_areas[at];
+ if (n > 1)
+ {
+ nest->areas[at][n - 2] = nest->areas[at][n - 1];
+ nest->n_areas[at]--;
+ }
+ }
+ continue;
+ }
+ }
+ else if (at == CTAT_ROW && a == PIVOT_AXIS_COLUMN && t->label_axis[PIVOT_AXIS_ROW] == PIVOT_AXIS_COLUMN)
+ continue;
+ else if (at == CTAT_COL && a == PIVOT_AXIS_ROW && t->label_axis[PIVOT_AXIS_ROW] == PIVOT_AXIS_COLUMN)
+ {
+ size_t n = nest->n_areas[at];
+ if (n > 1)
+ {
+ nest->areas[at][n - 2] = nest->areas[at][n - 1];
+ nest->n_areas[at]--;
+ }
+ continue;
+ }
+ else if (at == CTAT_COL && a == PIVOT_AXIS_ROW && t->label_axis[PIVOT_AXIS_COLUMN] == PIVOT_AXIS_ROW)
+ continue;
+ else if (at == CTAT_ROW && a == PIVOT_AXIS_COLUMN && t->label_axis[PIVOT_AXIS_COLUMN] == PIVOT_AXIS_ROW)
+ {
+ size_t n = nest->n_areas[at];
+ if (n > 1)
+ {
+ nest->areas[at][n - 2] = nest->areas[at][n - 1];
+ nest->n_areas[at]--;
+ }
+ continue;
+ }
+ else if (at == CTAT_COL && a == PIVOT_AXIS_ROW && t->label_axis[PIVOT_AXIS_ROW] == PIVOT_AXIS_LAYER)
+ {
+ size_t n = nest->n_areas[at];
+ if (n > 1)
+ {
+ nest->areas[at][n - 2] = nest->areas[at][n - 1];
+ nest->n_areas[at]--;
+ }
+ continue;
+ }
+ else if (at == CTAT_ROW && a == PIVOT_AXIS_COLUMN && t->label_axis[PIVOT_AXIS_COLUMN] == PIVOT_AXIS_LAYER)
+ {
+ size_t n = nest->n_areas[at];
+ if (n > 1)
+ {
+ nest->areas[at][n - 2] = nest->areas[at][n - 1];
+ nest->n_areas[at]--;
+ }
+ continue;
+ }
+ else
+ {
+ bool drop_last = (at == CTAT_SUBTABLE ? a != PIVOT_AXIS_LAYER
+ : at == CTAT_ROW ? a == PIVOT_AXIS_COLUMN
+ : at == CTAT_COL ? a == PIVOT_AXIS_ROW
+ : false);
+ bool drop_additional
+ = ((t->label_axis[PIVOT_AXIS_ROW] == PIVOT_AXIS_COLUMN && (at == CTAT_ROW || at == CTAT_LAYERROW) && a == PIVOT_AXIS_ROW)
+ || (t->label_axis[PIVOT_AXIS_COLUMN] == PIVOT_AXIS_ROW && (at == CTAT_COL || at == CTAT_LAYERCOL) && a == PIVOT_AXIS_COLUMN));
+
+ n_drop = 0;
+ if (drop_last)
+ n_drop++;
+ if (drop_additional)
+ n_drop++;