+ continue;
+ }
+
+ size_t n_drop = 0;
+ bool drop_inner = false;
+ switch (at)
+ {
+ case CTAT_SUBTABLE:
+ if (t->clabels_from_axis == PIVOT_AXIS_LAYER)
+ n_drop = a != PIVOT_AXIS_LAYER;
+ else if (t->clabels_to_axis != PIVOT_AXIS_LAYER)
+ n_drop = a == t->clabels_from_axis ? 2 : 0;
+ else
+ {
+ drop_inner = a == t->clabels_from_axis;
+ n_drop = a != t->clabels_from_axis && a != PIVOT_AXIS_LAYER;
+ }
+ break;
+
+ case CTAT_LAYERROW:
+ n_drop = a == PIVOT_AXIS_ROW && t->label_axis[PIVOT_AXIS_ROW] == PIVOT_AXIS_COLUMN;
+ break;
+
+ case CTAT_LAYERCOL:
+ n_drop = a == PIVOT_AXIS_COLUMN && t->label_axis[PIVOT_AXIS_COLUMN] == PIVOT_AXIS_ROW;
+ break;
+
+ case CTAT_ROW:
+ if (a == PIVOT_AXIS_COLUMN && t->label_axis[PIVOT_AXIS_ROW] == PIVOT_AXIS_COLUMN)
+ n_drop = 0;
+ else if (a == PIVOT_AXIS_COLUMN && t->label_axis[PIVOT_AXIS_COLUMN] == PIVOT_AXIS_ROW)
+ {
+ drop_inner = true;
+ n_drop = 0;
+ }
+ else if (a == PIVOT_AXIS_COLUMN && t->label_axis[PIVOT_AXIS_COLUMN] == PIVOT_AXIS_LAYER)
+ {
+ drop_inner = true;
+ n_drop = 0;
+ }
+ else
+ {
+ n_drop = a == PIVOT_AXIS_COLUMN;
+ if (a == PIVOT_AXIS_ROW && t->label_axis[PIVOT_AXIS_ROW] == PIVOT_AXIS_COLUMN)
+ n_drop++;
+ }
+ break;
+
+ case CTAT_COL:
+ if (a == PIVOT_AXIS_ROW && t->label_axis[PIVOT_AXIS_ROW] == PIVOT_AXIS_COLUMN)
+ {
+ drop_inner = true;
+ n_drop = 0;
+ }
+ else if (a == PIVOT_AXIS_ROW && t->label_axis[PIVOT_AXIS_COLUMN] == PIVOT_AXIS_ROW)
+ n_drop = 0;
+ else if (a == PIVOT_AXIS_ROW && t->label_axis[PIVOT_AXIS_ROW] == PIVOT_AXIS_LAYER)
+ {
+ drop_inner = true;
+ n_drop = 0;
+ }
+ else
+ {
+ n_drop = a == PIVOT_AXIS_ROW;
+ if (a == PIVOT_AXIS_COLUMN && t->label_axis[PIVOT_AXIS_COLUMN] == PIVOT_AXIS_ROW)
+ n_drop++;
+ }
+ break;
+
+ case CTAT_LAYER:
+ case CTAT_TABLE:
+ n_drop = 0;
+ break;