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Erica FischerandCursor
1a7075e3ab
In the C++ port, json_free was just `o.reset()`, which dropped the caller's reference but left the subtree alive: the parent's vector slot kept it allocated, and for line-delimited streams the parser's jp->root co-owned it until the next top-level value started parsing. That defeated the geojson-loop pattern of calling json_free on each feature after serializing it, which is supposed to release the feature so it doesn't sit in memory while subsequent ones are parsed. Restore the historical "remove this from the tree" semantics by splicing the node out of its parent (sharing splice_from_parent with json_disconnect) and clearing jp->root when the node is the parser's current top-level value, then dropping the caller's reference. Two unit tests pin this down: a pruning test parses "[[1, 2], [3, 4], [5, 6]]" element-wise and confirms that calling json_free on [3, 4] leaves the outer array with just [1, 2] and [5, 6]; a top-level test uses a weak_ptr observer to confirm that json_free on the parser's root really destroys the tree. Co-authored-by: Cursor <cursoragent@cursor.com>