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@nomeyer nomeyer/code.ts
Created Sep 11, 2019

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Anonymised Abstract Syntax Tree example
const lines = [
'I am a string',
'I am not a string',
'Lies',
'You got me',
];
function printLines(callback: () => void) {
lines.forEach((line, i) => console.log(`Line ${i}: ${line}`));
callback();
}
{
"type": "FunctionDeclaration",
"start": 88,
"end": 212,
"loc": {
"start": {
"line": 8,
"column": 0
},
"end": {
"line": 11,
"column": 1
}
},
"id": {
"type": "Identifier",
"start": 97,
"end": 107,
"loc": {
"start": {
"line": 8,
"column": 9
},
"end": {
"line": 8,
"column": 19
},
"identifierName": "eab75b094e80638be4554d3bb0c8782ad8bc628f"
},
"name": "eab75b094e80638be4554d3bb0c8782ad8bc628f"
},
"generator": false,
"async": false,
"params": [
{
"type": "Identifier",
"start": 108,
"end": 128,
"loc": {
"start": {
"line": 8,
"column": 20
},
"end": {
"line": 8,
"column": 40
},
"identifierName": "b4d5b37bf7a986c138ede89e0806f366b5cb1830"
},
"name": "b4d5b37bf7a986c138ede89e0806f366b5cb1830",
"typeAnnotation": {
"type": "TSTypeAnnotation",
"start": 116,
"end": 128,
"loc": {
"start": {
"line": 8,
"column": 28
},
"end": {
"line": 8,
"column": 40
}
},
"typeAnnotation": {
"type": "TSFunctionType",
"start": 118,
"end": 128,
"loc": {
"start": {
"line": 8,
"column": 30
},
"end": {
"line": 8,
"column": 40
}
},
"parameters": [],
"typeAnnotation": {
"type": "TSTypeAnnotation",
"start": 121,
"end": 128,
"loc": {
"start": {
"line": 8,
"column": 33
},
"end": {
"line": 8,
"column": 40
}
},
"typeAnnotation": {
"type": "TSVoidKeyword",
"start": 124,
"end": 128,
"loc": {
"start": {
"line": 8,
"column": 36
},
"end": {
"line": 8,
"column": 40
}
}
}
}
}
}
}
],
"body": {
"type": "BlockStatement",
"start": 130,
"end": 212,
"loc": {
"start": {
"line": 8,
"column": 42
},
"end": {
"line": 11,
"column": 1
}
},
"body": [
{
"type": "ExpressionStatement",
"start": 134,
"end": 196,
"loc": {
"start": {
"line": 9,
"column": 2
},
"end": {
"line": 9,
"column": 64
}
},
"expression": {
"type": "CallExpression",
"start": 134,
"end": 195,
"loc": {
"start": {
"line": 9,
"column": 2
},
"end": {
"line": 9,
"column": 63
}
},
"callee": {
"type": "MemberExpression",
"start": 134,
"end": 147,
"loc": {
"start": {
"line": 9,
"column": 2
},
"end": {
"line": 9,
"column": 15
}
},
"object": {
"type": "Identifier",
"start": 134,
"end": 139,
"loc": {
"start": {
"line": 9,
"column": 2
},
"end": {
"line": 9,
"column": 7
},
"identifierName": "8525aaa8359e52b9251c3d249c0cad272acd6251"
},
"name": "8525aaa8359e52b9251c3d249c0cad272acd6251"
},
"property": {
"type": "Identifier",
"start": 140,
"end": 147,
"loc": {
"start": {
"line": 9,
"column": 8
},
"end": {
"line": 9,
"column": 15
},
"identifierName": "edc5ee22beb2b82f4da41914d8d41cca9c53020f"
},
"name": "edc5ee22beb2b82f4da41914d8d41cca9c53020f"
},
"computed": false
},
"arguments": [
{
"type": "ArrowFunctionExpression",
"start": 148,
"end": 194,
"loc": {
"start": {
"line": 9,
"column": 16
},
"end": {
"line": 9,
"column": 62
}
},
"id": null,
"generator": false,
"async": false,
"params": [
{
"type": "Identifier",
"start": 149,
"end": 153,
"loc": {
"start": {
"line": 9,
"column": 17
},
"end": {
"line": 9,
"column": 21
},
"identifierName": "264f39cab871e4cfd65b3a002f7255888bb5ed97"
},
"name": "264f39cab871e4cfd65b3a002f7255888bb5ed97"
},
{
"type": "Identifier",
"start": 155,
"end": 156,
"loc": {
"start": {
"line": 9,
"column": 23
},
"end": {
"line": 9,
"column": 24
},
"identifierName": "042dc4512fa3d391c5170cf3aa61e6a638f84342"
},
"name": "042dc4512fa3d391c5170cf3aa61e6a638f84342"
}
],
"body": {
"type": "CallExpression",
"start": 161,
"end": 194,
"loc": {
"start": {
"line": 9,
"column": 29
},
"end": {
"line": 9,
"column": 62
}
},
"callee": {
"type": "MemberExpression",
"start": 161,
"end": 172,
"loc": {
"start": {
"line": 9,
"column": 29
},
"end": {
"line": 9,
"column": 40
}
},
"object": {
"type": "Identifier",
"start": 161,
"end": 168,
"loc": {
"start": {
"line": 9,
"column": 29
},
"end": {
"line": 9,
"column": 36
},
"identifierName": "e2346381bb8eb382eb8b3877a9d3838996c5ca2d"
},
"name": "e2346381bb8eb382eb8b3877a9d3838996c5ca2d"
},
"property": {
"type": "Identifier",
"start": 169,
"end": 172,
"loc": {
"start": {
"line": 9,
"column": 37
},
"end": {
"line": 9,
"column": 40
},
"identifierName": "7babc233de26ab19ead1b9c278128d5c434910ee"
},
"name": "7babc233de26ab19ead1b9c278128d5c434910ee"
},
"computed": false
},
"arguments": [
{
"type": "TemplateLiteral",
"start": 173,
"end": 193,
"loc": {
"start": {
"line": 9,
"column": 41
},
"end": {
"line": 9,
"column": 61
}
},
"expressions": [
{
"type": "Identifier",
"start": 181,
"end": 182,
"loc": {
"start": {
"line": 9,
"column": 49
},
"end": {
"line": 9,
"column": 50
},
"identifierName": "042dc4512fa3d391c5170cf3aa61e6a638f84342"
},
"name": "042dc4512fa3d391c5170cf3aa61e6a638f84342"
},
{
"type": "Identifier",
"start": 187,
"end": 191,
"loc": {
"start": {
"line": 9,
"column": 55
},
"end": {
"line": 9,
"column": 59
},
"identifierName": "264f39cab871e4cfd65b3a002f7255888bb5ed97"
},
"name": "264f39cab871e4cfd65b3a002f7255888bb5ed97"
}
],
"quasis": [
{
"type": "TemplateElement",
"start": 174,
"end": 179,
"loc": {
"start": {
"line": 9,
"column": 42
},
"end": {
"line": 9,
"column": 47
}
},
"value": "f1a5b8929ea454f44e7d470d0c2b59d040b4a5f0",
"tail": false
},
{
"type": "TemplateElement",
"start": 183,
"end": 185,
"loc": {
"start": {
"line": 9,
"column": 51
},
"end": {
"line": 9,
"column": 53
}
},
"value": "2334a9f235c7e28bbfce7b8a455691070dd3e203",
"tail": false
},
{
"type": "TemplateElement",
"start": 192,
"end": 192,
"loc": {
"start": {
"line": 9,
"column": 60
},
"end": {
"line": 9,
"column": 60
}
},
"value": "bb11830d6a9912de5cba701c214e0430ceb7f250",
"tail": true
}
]
}
]
}
}
]
}
},
{
"type": "ExpressionStatement",
"start": 199,
"end": 210,
"loc": {
"start": {
"line": 10,
"column": 2
},
"end": {
"line": 10,
"column": 13
}
},
"expression": {
"type": "CallExpression",
"start": 199,
"end": 209,
"loc": {
"start": {
"line": 10,
"column": 2
},
"end": {
"line": 10,
"column": 12
}
},
"callee": {
"type": "Identifier",
"start": 199,
"end": 207,
"loc": {
"start": {
"line": 10,
"column": 2
},
"end": {
"line": 10,
"column": 10
},
"identifierName": "b4d5b37bf7a986c138ede89e0806f366b5cb1830"
},
"name": "b4d5b37bf7a986c138ede89e0806f366b5cb1830"
},
"arguments": []
}
}
],
"directives": []
}
}
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