Created
July 5, 2019 21:35
-
-
Save koush/a1284f5c6618237c0fea98dd9d4cd9a2 to your computer and use it in GitHub Desktop.
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
let currentTypes = null; | |
function wrapWithTypes (types, fn) { | |
return function (...args) { | |
const oldTypes = currentTypes; | |
currentTypes = types; | |
try { | |
return fn.apply(this, args); | |
} finally { | |
currentTypes = oldTypes; | |
} | |
}; | |
} | |
function wrapDuktapeThread (argument) { | |
return [ | |
{ | |
"type": "VariableDeclaration", | |
"declarations": [ | |
{ | |
"type": "VariableDeclarator", | |
"id": { | |
"type": "Identifier", | |
"name": "__thread" | |
}, | |
"init": { | |
"type": "NewExpression", | |
"callee": { | |
"type": "MemberExpression", | |
"object": { | |
"type": "Identifier", | |
"name": "Duktape" | |
}, | |
"property": { | |
"type": "Identifier", | |
"name": "Thread" | |
}, | |
"computed": false | |
}, | |
"arguments": [ | |
argument | |
] | |
} | |
} | |
], | |
"kind": "var" | |
}, | |
{ | |
"type": "ReturnStatement", | |
"argument": { | |
"type": "ObjectExpression", | |
"properties": [ | |
{ | |
"type": "ObjectMethod", | |
"method": true, | |
"shorthand": false, | |
"computed": false, | |
"key": { | |
"type": "Identifier", | |
"name": "next" | |
}, | |
"kind": "method", | |
"id": null, | |
"generator": false, | |
"expression": false, | |
"async": false, | |
"params": [], | |
"body": { | |
"type": "BlockStatement", | |
"body": [ | |
{ | |
"type": "VariableDeclaration", | |
"declarations": [ | |
{ | |
"type": "VariableDeclarator", | |
"id": { | |
"type": "Identifier", | |
"name": "ret" | |
}, | |
"init": { | |
"type": "CallExpression", | |
"callee": { | |
"type": "MemberExpression", | |
"object": { | |
"type": "MemberExpression", | |
"object": { | |
"type": "Identifier", | |
"name": "Duktape" | |
}, | |
"property": { | |
"type": "Identifier", | |
"name": "Thread" | |
}, | |
"computed": false | |
}, | |
"property": { | |
"type": "Identifier", | |
"name": "resume" | |
}, | |
"computed": false | |
}, | |
"arguments": [ | |
{ | |
"type": "Identifier", | |
"name": "__thread" | |
} | |
] | |
} | |
} | |
], | |
"kind": "var" | |
}, | |
{ | |
"type": "IfStatement", | |
"test": { | |
"type": "LogicalExpression", | |
"left": { | |
"type": "Identifier", | |
"name": "ret" | |
}, | |
"operator": "&&", | |
"right": { | |
"type": "MemberExpression", | |
"object": { | |
"type": "Identifier", | |
"name": "ret" | |
}, | |
"property": { | |
"type": "Identifier", | |
"name": "__iter" | |
}, | |
"computed": false | |
} | |
}, | |
"consequent": { | |
"type": "BlockStatement", | |
"body": [ | |
{ | |
"type": "ReturnStatement", | |
"argument": { | |
"type": "MemberExpression", | |
"object": { | |
"type": "Identifier", | |
"name": "ret" | |
}, | |
"property": { | |
"type": "Identifier", | |
"name": "next" | |
}, | |
"computed": false | |
} | |
} | |
], | |
"directives": [] | |
}, | |
"alternate": null | |
}, | |
{ | |
"type": "ReturnStatement", | |
"argument": { | |
"type": "ObjectExpression", | |
"properties": [ | |
{ | |
"type": "ObjectProperty", | |
"method": false, | |
"shorthand": false, | |
"computed": false, | |
"key": { | |
"type": "Identifier", | |
"name": "value" | |
}, | |
"value": { | |
"type": "Identifier", | |
"name": "ret" | |
} | |
}, | |
{ | |
"type": "ObjectProperty", | |
"method": false, | |
"shorthand": false, | |
"computed": false, | |
"key": { | |
"type": "Identifier", | |
"name": "done" | |
}, | |
"value": { | |
"type": "BooleanLiteral", | |
"value": true | |
} | |
} | |
] | |
} | |
} | |
], | |
"directives": [] | |
} | |
} | |
] | |
} | |
} | |
]; | |
} | |
function wrapYieldStatement (argument) { | |
return { | |
"type": "ExpressionStatement", | |
"expression": { | |
"type": "CallExpression", | |
"callee": { | |
"type": "MemberExpression", | |
"object": { | |
"type": "MemberExpression", | |
"object": { | |
"type": "Identifier", | |
"name": "Duktape" | |
}, | |
"property": { | |
"type": "Identifier", | |
"name": "Thread" | |
}, | |
"computed": false | |
}, | |
"property": { | |
"type": "Identifier", | |
"name": "yield" | |
}, | |
"computed": false | |
}, | |
"arguments": [ | |
{ | |
"type": "ObjectExpression", | |
"properties": [ | |
{ | |
"type": "ObjectProperty", | |
"method": false, | |
"shorthand": false, | |
"computed": false, | |
"key": { | |
"type": "Identifier", | |
"name": "__iter" | |
}, | |
"value": { | |
"type": "BooleanLiteral", | |
"value": true | |
} | |
}, | |
{ | |
"type": "ObjectProperty", | |
"method": false, | |
"shorthand": false, | |
"computed": false, | |
"key": { | |
"type": "Identifier", | |
"name": "next" | |
}, | |
"value": { | |
"type": "ObjectExpression", | |
"properties": [ | |
{ | |
"type": "ObjectProperty", | |
"method": false, | |
"shorthand": false, | |
"computed": false, | |
"key": { | |
"type": "Identifier", | |
"name": "done" | |
}, | |
"value": { | |
"type": "BooleanLiteral", | |
"value": false | |
} | |
}, | |
{ | |
"type": "ObjectProperty", | |
"method": false, | |
"shorthand": false, | |
"computed": false, | |
"key": { | |
"type": "Identifier", | |
"name": "value" | |
}, | |
"value": argument | |
} | |
] | |
} | |
} | |
] | |
} | |
] | |
} | |
} | |
} | |
module.exports = ({ types: t }) => { | |
return { | |
visitor: { | |
YieldExpression (path, state) { | |
console.log(); | |
const node = t.cloneNode(path.get("argument").node); | |
// path.get(body).set("body", ) | |
path.replaceWith(wrapYieldStatement(node)); | |
}, | |
Method (path, state) { | |
let node = path.node; | |
if (!shouldRegenerate(node, state)) return; | |
const container = t.functionExpression( | |
null, | |
[], | |
t.cloneNode(node.body, false), | |
node.generator, | |
node.async, | |
); | |
path.get("body").set("body", [ | |
t.returnStatement( | |
t.callExpression(container, []), | |
), | |
]); | |
// Regardless of whether or not the wrapped function is a an async method | |
// or generator the outer function should not be | |
node.generator = false; | |
// Unwrap the wrapper IIFE's environment so super and this and such still work. | |
path | |
.get("body.body.0.argument.callee") | |
.unwrapFunctionEnvironment(); | |
}, | |
Function: { | |
exit: wrapWithTypes(t, function (path, state) { | |
console.log(); | |
let node = path.node; | |
if (!shouldRegenerate(node, state)) return; | |
const container = t.functionExpression( | |
null, | |
[], | |
t.cloneNode(node.body, false), | |
false, | |
node.async, | |
); | |
node.generator = false; | |
path.get("body").set("body", | |
wrapDuktapeThread(container) | |
); | |
path | |
.get("body.body.0.declarations.0.init.arguments.0") | |
.unwrapFunctionEnvironment(); | |
}) | |
} | |
} | |
} | |
} | |
// Check if a node should be transformed by regenerator | |
function shouldRegenerate (node, state) { | |
return node.generator | |
} |
Sign up for free
to join this conversation on GitHub.
Already have an account?
Sign in to comment