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query: Handle captured wildcard nodes at the root of patterns

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This commit is contained in:
Max Brunsfeld 2020-10-08 12:34:08 -07:00
parent 1f3248a3e0
commit 857a9ed07b
5 changed files with 212 additions and 35 deletions
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27
lib/src/tree_cursor.c
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@ -364,6 +364,33 @@ void ts_tree_cursor_current_status(
}
}
TSNode ts_tree_cursor_parent_node(const TSTreeCursor *_self) {
const TreeCursor *self = (const TreeCursor *)_self;
for (int i = (int)self->stack.size - 2; i >= 0; i--) {
TreeCursorEntry *entry = &self->stack.contents[i];
bool is_visible = true;
TSSymbol alias_symbol = 0;
if (i > 0) {
TreeCursorEntry *parent_entry = &self->stack.contents[i - 1];
alias_symbol = ts_language_alias_at(
self->tree->language,
parent_entry->subtree->ptr->production_id,
entry->structural_child_index
);
is_visible = (alias_symbol != 0) || ts_subtree_visible(*entry->subtree);
}
if (is_visible) {
return ts_node_new(
self->tree,
entry->subtree,
entry->position,
alias_symbol
);
}
}
return ts_node_new(NULL, NULL, length_zero(), 0);
}
TSFieldId ts_tree_cursor_current_field_id(const TSTreeCursor *_self) {
const TreeCursor *self = (const TreeCursor *)_self;