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Handle null parent in {next,prev}_sibling

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This commit is contained in:
Max Brunsfeld 2014-08-25 11:28:09 -07:00
parent cef6827182
commit 1535ebd21c
2 changed files with 17 additions and 2 deletions
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10
src/runtime/node.c
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@ -53,11 +53,17 @@ const char *ts_node_string(const TSNode *node) {
TSNode *ts_node_parent(TSNode *child) { return child->parent; }
TSNode *ts_node_prev_sibling(TSNode *child) {
return ts_node_child(child->parent, child->index - 1);
if (child->parent)
return ts_node_child(child->parent, child->index - 1);
else
return NULL;
}
TSNode *ts_node_next_sibling(TSNode *child) {
return ts_node_child(child->parent, child->index + 1);
if (child->parent)
return ts_node_child(child->parent, child->index + 1);
else
return NULL;
}
size_t ts_node_child_count(const TSNode *parent) {