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Extract for-of iterator handling to a helper (#11262)

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* Extract for-of iterator handling to a helper

Dis greatly recudes the code size when for-of is used multiple times across the
codebase. Also, makes it easier to read what's happening in a compiled loop.

* Unify spec and loose code

* Legacy implementation fallback

* Update tmp var name

* Updates from review and after rebase
This commit is contained in:
Nicolò Ribaudo
2020-03-17 00:45:34 +01:00
committed by GitHub
parent a11855e586
commit 59976680df
51 changed files with 624 additions and 576 deletions
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2
packages/babel-plugin-transform-parameters/test/fixtures/parameters/options.json vendored
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@@ -1,7 +1,7 @@
{
"plugins": [
"proposal-class-properties",
"external-helpers",
["external-helpers", { "helperVersion": "7.100.0" }],
"syntax-typescript",
"syntax-flow",
"transform-parameters",

20
packages/babel-plugin-transform-parameters/test/fixtures/parameters/rest-member-expression-deoptimisation/output.js vendored
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@@ -153,28 +153,18 @@ function forOf() {
rest[_key16] = arguments[_key16];
}
var _iteratorNormalCompletion = true;
var _didIteratorError = false;
var _iteratorError = undefined;
var _iterator = babelHelpers.createForOfIteratorHelper(this),
_step;
try {
for (var _iterator = this[Symbol.iterator](), _step; !(_iteratorNormalCompletion = (_step = _iterator.next()).done); _iteratorNormalCompletion = true) {
for (_iterator.s(); !(_step = _iterator.n()).done;) {
rest[0] = _step.value;
;
}
} catch (err) {
_didIteratorError = true;
_iteratorError = err;
_iterator.e(err);
} finally {
try {
if (!_iteratorNormalCompletion && _iterator.return != null) {
_iterator.return();
}
} finally {
if (_didIteratorError) {
throw _iteratorError;
}
}
_iterator.f();
}
}

6
packages/babel-plugin-transform-parameters/test/fixtures/parameters/rest-nested-iife/output.js vendored
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@@ -1,7 +1,3 @@
function _createSuper(Derived) { return function () { var Super = babelHelpers.getPrototypeOf(Derived), result; if (_isNativeReflectConstruct()) { var NewTarget = babelHelpers.getPrototypeOf(this).constructor; result = Reflect.construct(Super, arguments, NewTarget); } else { result = Super.apply(this, arguments); } return babelHelpers.possibleConstructorReturn(this, result); }; }
function _isNativeReflectConstruct() { if (typeof Reflect === "undefined" || !Reflect.construct) return false; if (Reflect.construct.sham) return false; if (typeof Proxy === "function") return true; try { Date.prototype.toString.call(Reflect.construct(Date, [], function () {})); return true; } catch (e) { return false; } }
function broken(x) {
if (true) {
var Foo = /*#__PURE__*/function (_Bar) {
@@ -9,7 +5,7 @@ function broken(x) {
babelHelpers.inherits(Foo, _Bar);
var _super = _createSuper(Foo);
var _super = babelHelpers.createSuper(Foo);
function Foo() {
babelHelpers.classCallCheck(this, Foo);