for-await.js
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"use strict";
Object.defineProperty(exports, "__esModule", {
value: true
});
exports.default = _default;
var _core = require("@babel/core");
const buildForAwait = (0, _core.template)(`
async function wrapper() {
var ITERATOR_ABRUPT_COMPLETION = false;
var ITERATOR_HAD_ERROR_KEY = false;
var ITERATOR_ERROR_KEY;
try {
for (
var ITERATOR_KEY = GET_ITERATOR(OBJECT), STEP_KEY;
ITERATOR_ABRUPT_COMPLETION = !(STEP_KEY = await ITERATOR_KEY.next()).done;
ITERATOR_ABRUPT_COMPLETION = false
) {
}
} catch (err) {
ITERATOR_HAD_ERROR_KEY = true;
ITERATOR_ERROR_KEY = err;
} finally {
try {
if (ITERATOR_ABRUPT_COMPLETION && ITERATOR_KEY.return != null) {
await ITERATOR_KEY.return();
}
} finally {
if (ITERATOR_HAD_ERROR_KEY) {
throw ITERATOR_ERROR_KEY;
}
}
}
}
`);
function _default(path, {
getAsyncIterator
}) {
const {
node,
scope,
parent
} = path;
const stepKey = scope.generateUidIdentifier("step");
const stepValue = _core.types.memberExpression(stepKey, _core.types.identifier("value"));
const left = node.left;
let declar;
if (_core.types.isIdentifier(left) || _core.types.isPattern(left) || _core.types.isMemberExpression(left)) {
declar = _core.types.expressionStatement(_core.types.assignmentExpression("=", left, stepValue));
} else if (_core.types.isVariableDeclaration(left)) {
declar = _core.types.variableDeclaration(left.kind, [_core.types.variableDeclarator(left.declarations[0].id, stepValue)]);
}
let template = buildForAwait({
ITERATOR_HAD_ERROR_KEY: scope.generateUidIdentifier("didIteratorError"),
ITERATOR_ABRUPT_COMPLETION: scope.generateUidIdentifier("iteratorAbruptCompletion"),
ITERATOR_ERROR_KEY: scope.generateUidIdentifier("iteratorError"),
ITERATOR_KEY: scope.generateUidIdentifier("iterator"),
GET_ITERATOR: getAsyncIterator,
OBJECT: node.right,
STEP_KEY: _core.types.cloneNode(stepKey)
});
template = template.body.body;
const isLabeledParent = _core.types.isLabeledStatement(parent);
const tryBody = template[3].block.body;
const loop = tryBody[0];
if (isLabeledParent) {
tryBody[0] = _core.types.labeledStatement(parent.label, loop);
}
return {
replaceParent: isLabeledParent,
node: template,
declar,
loop
};
}
//# sourceMappingURL=for-await.js.map