/*!
* \param sel Selection to append (can be NULL, in which
* case nothing is done).
* \param last Last selection, or NULL if not present or not known.
* \param scanner Scanner data structure.
* \returns The last selection after the append.
*
* Appends \p sel after the last root element, and returns either \p sel
* (if it was non-NULL) or the last element (if \p sel was NULL).
*/
SelectionTreeElementPointer
_gmx_sel_append_selection(const gmx::SelectionTreeElementPointer &sel,
gmx::SelectionTreeElementPointer last,
yyscan_t scanner)
{
gmx_ana_selcollection_t *sc = _gmx_sel_lexer_selcollection(scanner);
/* Append sel after last, or the last element of sc if last is NULL */
if (last)
{
last->next = sel;
}
else
{
if (sc->root)
{
last = sc->root;
while (last->next)
{
last = last->next;
}
last->next = sel;
}
else
{
sc->root = sel;
}
}
/* Initialize a selection object if necessary */
if (sel)
{
last = sel;
/* Add the new selection to the collection if it is not a variable. */
if (sel->child->type != SEL_SUBEXPR)
{
gmx::SelectionDataPointer selPtr(
new gmx::internal::SelectionData(
sel.get(), _gmx_sel_lexer_pselstr(scanner)));
sc->sel.push_back(gmx::move(selPtr));
}
}
/* Clear the selection string now that we've saved it */
_gmx_sel_lexer_clear_pselstr(scanner);
return last;
}
