output.json

{
  "type": "File",
  "start":0,"end":36,"loc":{"start":{"line":1,"column":0},"end":{"line":1,"column":36}},
  "program": {
    "type": "Program",
    "start":0,"end":36,"loc":{"start":{"line":1,"column":0},"end":{"line":1,"column":36}},
    "sourceType": "module",
    "interpreter": null,
    "body": [
      {
        "type": "VariableDeclaration",
        "start":0,"end":36,"loc":{"start":{"line":1,"column":0},"end":{"line":1,"column":36}},
        "declarations": [
          {
            "type": "VariableDeclarator",
            "start":4,"end":35,"loc":{"start":{"line":1,"column":4},"end":{"line":1,"column":35}},
            "id": {
              "type": "Identifier",
              "start":4,"end":5,"loc":{"start":{"line":1,"column":4},"end":{"line":1,"column":5},"identifierName":"f"},
              "name": "f"
            },
            "init": {
              "type": "ArrowFunctionExpression",
              "start":8,"end":35,"loc":{"start":{"line":1,"column":8},"end":{"line":1,"column":35}},
              "predicate": null,
              "returnType": {
                "type": "TypeAnnotation",
                "start":11,"end":28,"loc":{"start":{"line":1,"column":11},"end":{"line":1,"column":28}},
                "typeAnnotation": {
                  "type": "FunctionTypeAnnotation",
                  "start":14,"end":27,"loc":{"start":{"line":1,"column":14},"end":{"line":1,"column":27}},
                  "params": [
                    {
                      "type": "FunctionTypeParam",
                      "start":14,"end":23,"loc":{"start":{"line":1,"column":14},"end":{"line":1,"column":23}},
                      "name": null,
                      "optional": false,
                      "typeAnnotation": {
                        "type": "NumberTypeAnnotation",
                        "start":14,"end":20,"loc":{"start":{"line":1,"column":14},"end":{"line":1,"column":20}}
                      }
                    }
                  ],
                  "rest": null,
                  "this": null,
                  "returnType": {
                    "type": "NumberLiteralTypeAnnotation",
                    "start":24,"end":27,"loc":{"start":{"line":1,"column":24},"end":{"line":1,"column":27}},
                    "extra": {
                      "rawValue": 123,
                      "raw": "123"
                    },
                    "value": 123
                  },
                  "typeParameters": null
                }
              },
              "id": null,
              "generator": false,
              "async": false,
              "params": [
                {
                  "type": "Identifier",
                  "start":9,"end":10,"loc":{"start":{"line":1,"column":9},"end":{"line":1,"column":10},"identifierName":"x"},
                  "name": "x"
                }
              ],
              "body": {
                "type": "NumericLiteral",
                "start":32,"end":35,"loc":{"start":{"line":1,"column":32},"end":{"line":1,"column":35}},
                "extra": {
                  "rawValue": 123,
                  "raw": "123"
                },
                "value": 123
              }
            }
          }
        ],
        "kind": "var"
      }
    ],
    "directives": []
  }
}