+ /*
+ * If a span cell is found first, raise a warning and abort the
+ * parse. If a span cell is found and the last layout element
+ * isn't a "normal" layout, bail.
+ *
+ * FIXME: recover from this somehow?
+ */
+
+ if (TBL_CELL_SPAN == c) {
+ if (NULL == rp->first) {
+ mandoc_msg(MANDOCERR_TBLLAYOUT, tbl->parse,
+ ln, *pos, NULL);
+ return(0);
+ } else if (rp->last)
+ switch (rp->last->pos) {
+ case TBL_CELL_HORIZ:
+ /* FALLTHROUGH */
+ case TBL_CELL_DHORIZ:
+ mandoc_msg(MANDOCERR_TBLLAYOUT,
+ tbl->parse, ln, *pos, NULL);
+ return(0);
+ default:
+ break;
+ }
+ }
+
+ /*
+ * If a vertical spanner is found, we may not be in the first
+ * row.
+ */
+
+ if (TBL_CELL_DOWN == c && rp == tbl->first_row) {
+ mandoc_msg(MANDOCERR_TBLLAYOUT, tbl->parse, ln, *pos, NULL);
+ return(0);
+ }
+
+ (*pos)++;