babel/packages/babel-parser/test/fixtures/experimental/optional-chaining-assign/invalid-inc-prefix/output.json

{
  "type": "File",
  "start":0,"end":7,"loc":{"start":{"line":1,"column":0,"index":0},"end":{"line":1,"column":7,"index":7}},
  "errors": [
    "SyntaxError: Invalid optional chaining in the left-hand side of prefix operation. (1:2)"
  ],
  "program": {
    "type": "Program",
    "start":0,"end":7,"loc":{"start":{"line":1,"column":0,"index":0},"end":{"line":1,"column":7,"index":7}},
    "sourceType": "script",
    "interpreter": null,
    "body": [
      {
        "type": "ExpressionStatement",
        "start":0,"end":7,"loc":{"start":{"line":1,"column":0,"index":0},"end":{"line":1,"column":7,"index":7}},
        "expression": {
          "type": "UpdateExpression",
          "start":0,"end":6,"loc":{"start":{"line":1,"column":0,"index":0},"end":{"line":1,"column":6,"index":6}},
          "operator": "++",
          "prefix": true,
          "argument": {
            "type": "OptionalMemberExpression",
            "start":2,"end":6,"loc":{"start":{"line":1,"column":2,"index":2},"end":{"line":1,"column":6,"index":6}},
            "object": {
              "type": "Identifier",
              "start":2,"end":3,"loc":{"start":{"line":1,"column":2,"index":2},"end":{"line":1,"column":3,"index":3},"identifierName":"a"},
              "name": "a"
            },
            "computed": false,
            "property": {
              "type": "Identifier",
              "start":5,"end":6,"loc":{"start":{"line":1,"column":5,"index":5},"end":{"line":1,"column":6,"index":6},"identifierName":"b"},
              "name": "b"
            },
            "optional": true
          }
        }
      }
    ],
    "directives": []
  }
}