output.json

{
  "type": "File",
  "start": 0,
  "end": 9,
  "loc": {
    "start": {
      "line": 1,
      "column": 0
    },
    "end": {
      "line": 1,
      "column": 9
    }
  },
  "errors": [
    "SyntaxError: Invalid left-hand side in parenthesized expression (1:1)"
  ],
  "program": {
    "type": "Program",
    "start": 0,
    "end": 9,
    "loc": {
      "start": {
        "line": 1,
        "column": 0
      },
      "end": {
        "line": 1,
        "column": 9
      }
    },
    "sourceType": "script",
    "interpreter": null,
    "body": [
      {
        "type": "ExpressionStatement",
        "start": 0,
        "end": 9,
        "loc": {
          "start": {
            "line": 1,
            "column": 0
          },
          "end": {
            "line": 1,
            "column": 9
          }
        },
        "expression": {
          "type": "AssignmentExpression",
          "start": 0,
          "end": 9,
          "loc": {
            "start": {
              "line": 1,
              "column": 0
            },
            "end": {
              "line": 1,
              "column": 9
            }
          },
          "operator": "+=",
          "left": {
            "type": "ParenthesizedExpression",
            "start": 0,
            "end": 4,
            "loc": {
              "start": {
                "line": 1,
                "column": 0
              },
              "end": {
                "line": 1,
                "column": 4
              }
            },
            "expression": {
              "type": "UnaryExpression",
              "start": 1,
              "end": 3,
              "loc": {
                "start": {
                  "line": 1,
                  "column": 1
                },
                "end": {
                  "line": 1,
                  "column": 3
                }
              },
              "operator": "!",
              "prefix": true,
              "argument": {
                "type": "Identifier",
                "start": 2,
                "end": 3,
                "loc": {
                  "start": {
                    "line": 1,
                    "column": 2
                  },
                  "end": {
                    "line": 1,
                    "column": 3
                  },
                  "identifierName": "a"
                },
                "name": "a"
              }
            }
          },
          "right": {
            "type": "NumericLiteral",
            "start": 8,
            "end": 9,
            "loc": {
              "start": {
                "line": 1,
                "column": 8
              },
              "end": {
                "line": 1,
                "column": 9
              }
            },
            "extra": {
              "rawValue": 1,
              "raw": "1"
            },
            "value": 1
          }
        }
      }
    ],
    "directives": []
  }
}