Function decode_tree_with_codec_and_limits 

pub fn decode_tree_with_codec_and_limits(
    cx: &mut Cx,
    symbol: &Symbol,
    input: Input,
    read_policy: ReadPolicy,
    source_id: impl Into<String>,
    limits: DecodeLimits,
) -> Result<LocatedExprTree>

Full-tree decode under explicit DecodeLimits; see decode_tree_with_codec.