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发帖数: 8443 | 2 https://github.com/ternjs/acorn
npm install acorn
https://github.com/MatAtBread/acorn-es7-plugin/
var code = "async function x(){ if (x) return await(x-1) ; return 0 ; }\n";
var ast = acorn.parse(code,{
// Specify use of the plugin
plugins:{asyncawait:true},
// Specify the ecmaVersion
ecmaVersion:7
}) ;
// Show the AST
console.log(JSON.stringify(ast,null,2)) ;
output:
{
"type": "Program",
"body": [
{
"type": "FunctionDeclaration",
"id": {
"type": "Identifier",
"name": "x"
},
"generator": false,
"expression": false,
"params": [],
"body": {
"type": "BlockStatement",
"body": [
{
"type": "IfStatement",
"test": {
"type": "Identifier",
"name": "x"
},
"consequent": {
"type": "ReturnStatement",
"argument": {
"type": "AwaitExpression",
"operator": "await",
"argument": {
"type": "BinaryExpression",
"left": {
"type": "Identifier",
"name": "x"
},
"operator": "-",
"right": {
"type": "Literal",
"value": 1,
"raw": "1"
}
}
}
},
"alternate": null
},
{
"type": "ReturnStatement",
"argument": {
"type": "Literal",
"value": 0,
"raw": "0"
}
}
]
},
"async": true
}
],
"sourceType": "script"
} |
