+ continue;
+ }
+
+ enum pivot_axis_type ata, atb;
+ if (at == CTAT_ROW || at == CTAT_LAYERROW)
+ {
+ ata = PIVOT_AXIS_ROW;
+ atb = PIVOT_AXIS_COLUMN;
+ }
+ else if (at == CTAT_COL || at == CTAT_LAYERCOL)
+ {
+ ata = PIVOT_AXIS_COLUMN;
+ atb = PIVOT_AXIS_ROW;
+ }
+
+ 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
+ {
+ n_drop = a != PIVOT_AXIS_LAYER && a != t->clabels_from_axis;
+ drop_inner = a == t->clabels_from_axis;
+ }
+ break;
+
+ case CTAT_LAYERROW:
+ case CTAT_LAYERCOL:
+ n_drop = a == ata && t->label_axis[ata] == atb;
+ break;
+
+ case CTAT_ROW:
+ case CTAT_COL:
+ if (a == atb)
+ {
+ if (t->label_axis[ata] == atb)
+ ;
+ else if (t->label_axis[atb] == ata)
+ drop_inner = true;
+ else if (t->label_axis[atb] == PIVOT_AXIS_LAYER)
+ drop_inner = true;
+ else
+ n_drop = 1;
+ }
+ if (a == ata && t->label_axis[ata] == atb)
+ n_drop++;
+ break;
+
+ case CTAT_LAYER:
+ case CTAT_TABLE:
+ n_drop = 0;
+ break;