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Remove unnecessary returns in asyncToGenerator helper (#5548)

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* Remove unnecessary returns in asyncToGenerator helper

* Reuse "then" callbacks in asyncToGenerator helpher
This commit is contained in:
Andres Suarez 2017-04-06 11:40:55 -04:00 committed by Henry Zhu
parent 452f8f150c
commit f0dc710a46
2 changed files with 5 additions and 7 deletions
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2
packages/babel-core/test/fixtures/transformation/misc/regression-2892/expected.js vendored
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@ -46,7 +46,7 @@ var foo = function () {
};
}();
function _asyncToGenerator(fn) { return function () { var gen = fn.apply(this, arguments); return new Promise(function (resolve, reject) { function step(key, arg) { try { var info = gen[key](arg); var value = info.value; } catch (error) { reject(error); return; } if (info.done) { resolve(value); } else { return Promise.resolve(value).then(function (value) { step("next", value); }, function (err) { step("throw", err); }); } } return step("next"); }); }; }
function _asyncToGenerator(fn) { return function () { var gen = fn.apply(this, arguments); return new Promise(function (resolve, reject) { function step(key, arg) { try { var info = gen[key](arg); var value = info.value; } catch (error) { reject(error); return; } if (info.done) { resolve(value); } else { Promise.resolve(value).then(_next, _throw); } } function _next(value) { step("next", value); } function _throw(err) { step("throw", err); } _next(); }); }; }
function _classCallCheck(instance, Constructor) { if (!(instance instanceof Constructor)) { throw new TypeError("Cannot call a class as a function"); } }

10
packages/babel-helpers/src/helpers.js
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@ -230,15 +230,13 @@ helpers.asyncToGenerator = template(`
if (info.done) {
resolve(value);
} else {
return Promise.resolve(value).then(function (value) {
step("next", value);
}, function (err) {
step("throw", err);
});
Promise.resolve(value).then(_next, _throw);
}
}
function _next(value) { step("next", value); }
function _throw(err) { step("throw", err); }
return step("next");
_next();
});
};
})