{
  "_program": [
    ["_expression", "_program-tail"]
  ],
  "_program-tail": [
    ["_program"],
    []
  ],
  "_expression": [
    ["_dotted-chain"],
    ["_list"],
    ["_dotted-list"],
    ["_literal-list"],
    ["_object"],
    ["_atom"]
  ],
  "_list": [
    ["(", "_list-tail"]
  ],
  "_dotted-list": [
    ["(", ".", "_list-tail"]
  ],
  "_list-tail": [
    ["_expression", "_list-tail"],
    [")"]
  ],
  "_dotted-chain": [
    ["_obj-reference", ".", "identifier", "_dotted-chain-tail"]
  ],
  "_obj-reference": [
    ["_list"],
    ["_literal-list"],
    ["_object"],
    ["identifier"]
  ],
  "_dotted-chain-tail": [
    [".", "identifier", "_dotted-chain-tail"],
    []
  ],
  "_literal-list": [
    ["[", "_literal-list-tail"]
  ],
  "_literal-list-tail": [
    ["_expression", "_literal-list-tail"],
    ["]"]
  ],
  "_object": [
    ["{", "_object-tail"]
  ],
  "_object-tail": [
    ["_atom", "_expression", "_object-tail"],
    ["}"]
  ],
  "_atom": [
    ["identifier"],
    ["string"],
    ["number"],
    ["boolean"]
  ]
}