{ "type": "File", "start": 0, "end": 20, "loc": { "start": { "line": 1, "column": 0 }, "end": { "line": 1, "column": 20 } }, "program": { "type": "Program", "start": 0, "end": 20, "loc": { "start": { "line": 1, "column": 0 }, "end": { "line": 1, "column": 20 } }, "sourceType": "script", "body": [ { "type": "ExpressionStatement", "start": 0, "end": 20, "loc": { "start": { "line": 1, "column": 0 }, "end": { "line": 1, "column": 20 } }, "expression": { "type": "ArrowFunctionExpression", "start": 0, "end": 20, "loc": { "start": { "line": 1, "column": 0 }, "end": { "line": 1, "column": 20 } }, "id": null, "generator": false, "expression": true, "async": false, "params": [ { "type": "Identifier", "start": 1, "end": 5, "loc": { "start": { "line": 1, "column": 1 }, "end": { "line": 1, "column": 5 }, "identifierName": "eval" }, "name": "eval" }, { "type": "AssignmentPattern", "start": 7, "end": 13, "loc": { "start": { "line": 1, "column": 7 }, "end": { "line": 1, "column": 13 } }, "left": { "type": "Identifier", "start": 7, "end": 8, "loc": { "start": { "line": 1, "column": 7 }, "end": { "line": 1, "column": 8 }, "identifierName": "a" }, "name": "a" }, "right": { "type": "NumericLiteral", "start": 11, "end": 13, "loc": { "start": { "line": 1, "column": 11 }, "end": { "line": 1, "column": 13 } }, "extra": { "rawValue": 10, "raw": "10" }, "value": 10 } } ], "body": { "type": "NumericLiteral", "start": 18, "end": 20, "loc": { "start": { "line": 1, "column": 18 }, "end": { "line": 1, "column": 20 } }, "extra": { "rawValue": 42, "raw": "42" }, "value": 42 } } } ], "directives": [] } }