Document out param for getPentagonIndexes
@@ -908,7 +908,8 @@ int H3_EXPORT(pentagonIndexCount)() { return NUM_PENTAGONS; }
/**
* Generates all pentagons at the specified resolution
*
- * @param res The resolution to produce pentagons at
+ * @param res The resolution to produce pentagons at.
+ * @param out Output array. Must be of size pentagonIndexCount().
*/
void H3_EXPORT(getPentagonIndexes)(int res, H3Index* out) {
int i = 0;
