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s.golasch
2023-08-01 13:49:46 +02:00
commit 1fc239fd54
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build/node_modules/prepack/lib/react/hoisting.js generated vendored Normal file
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"use strict";
Object.defineProperty(exports, "__esModule", {
value: true
});
var _slicedToArray = function () { function sliceIterator(arr, i) { var _arr = []; var _n = true; var _d = false; var _e = undefined; try { for (var _i = arr[Symbol.iterator](), _s; !(_n = (_s = _i.next()).done); _n = true) { _arr.push(_s.value); if (i && _arr.length === i) break; } } catch (err) { _d = true; _e = err; } finally { try { if (!_n && _i["return"]) _i["return"](); } finally { if (_d) throw _e; } } return _arr; } return function (arr, i) { if (Array.isArray(arr)) { return arr; } else if (Symbol.iterator in Object(arr)) { return sliceIterator(arr, i); } else { throw new TypeError("Invalid attempt to destructure non-iterable instance"); } }; }(); /**
* Copyright (c) 2017-present, Facebook, Inc.
* All rights reserved.
*
* This source code is licensed under the BSD-style license found in the
* LICENSE file in the root directory of this source tree. An additional grant
* of patent rights can be found in the PATENTS file in the same directory.
*/
exports.canHoistFunction = canHoistFunction;
exports.canHoistReactElement = canHoistReactElement;
var _realm = require("../realm.js");
var _index = require("../values/index.js");
var _index2 = require("../methods/index.js");
var _invariant = require("../invariant.js");
var _invariant2 = _interopRequireDefault(_invariant);
var _utils = require("./utils.js");
var _ResidualHeapVisitor = require("../serializer/ResidualHeapVisitor.js");
function _interopRequireDefault(obj) { return obj && obj.__esModule ? obj : { default: obj }; }
// a nested object of a React Element should be hoisted where all its properties are known
// at evaluation time to be safe to hoist (because of the heuristics of a React render)
function canHoistObject(realm, object, residualHeapVisitor) {
if ((0, _utils.isReactElement)(object)) {
return canHoistReactElement(realm, object, residualHeapVisitor);
}
var _iteratorNormalCompletion = true;
var _didIteratorError = false;
var _iteratorError = undefined;
try {
for (var _iterator = object.properties[Symbol.iterator](), _step; !(_iteratorNormalCompletion = (_step = _iterator.next()).done); _iteratorNormalCompletion = true) {
var _ref = _step.value;
var _ref2 = _slicedToArray(_ref, 1);
var propName = _ref2[0];
var prop = (0, _index2.Get)(realm, object, propName);
if (!canHoistValue(realm, prop, residualHeapVisitor)) {
return false;
}
}
} catch (err) {
_didIteratorError = true;
_iteratorError = err;
} finally {
try {
if (!_iteratorNormalCompletion && _iterator.return) {
_iterator.return();
}
} finally {
if (_didIteratorError) {
throw _iteratorError;
}
}
}
var _iteratorNormalCompletion2 = true;
var _didIteratorError2 = false;
var _iteratorError2 = undefined;
try {
for (var _iterator2 = object.symbols[Symbol.iterator](), _step2; !(_iteratorNormalCompletion2 = (_step2 = _iterator2.next()).done); _iteratorNormalCompletion2 = true) {
var _ref3 = _step2.value;
var _ref4 = _slicedToArray(_ref3, 1);
var symbol = _ref4[0];
var prop = (0, _index2.Get)(realm, object, symbol);
if (!canHoistValue(realm, prop, residualHeapVisitor)) {
return false;
}
}
} catch (err) {
_didIteratorError2 = true;
_iteratorError2 = err;
} finally {
try {
if (!_iteratorNormalCompletion2 && _iterator2.return) {
_iterator2.return();
}
} finally {
if (_didIteratorError2) {
throw _iteratorError2;
}
}
}
return true;
}
function canHoistArray(realm, array, residualHeapVisitor) {
var lengthValue = (0, _index2.Get)(realm, array, "length");
(0, _invariant2.default)(lengthValue instanceof _index.NumberValue);
var length = lengthValue.value;
for (var i = 0; i < length; i++) {
var element = (0, _index2.Get)(realm, array, "" + i);
if (!canHoistValue(realm, element, residualHeapVisitor)) {
return false;
}
}
return true;
}
function canHoistFunction(realm, func, residualHeapVisitor) {
if (realm.react.hoistableFunctions.has(func)) {
// cast because Flow thinks that we may have set a value to be something other than a boolean?
return realm.react.hoistableFunctions.get(func);
}
if (residualHeapVisitor === undefined) {
return false;
}
// get the function instance
var functionInstance = residualHeapVisitor.functionInstances.get(func);
// we can safely hoist the function if the residual bindings hoistable too
if (functionInstance !== undefined) {
(0, _invariant2.default)(functionInstance.residualFunctionBindings instanceof Map);
var residualBindings = functionInstance.residualFunctionBindings;
var _iteratorNormalCompletion3 = true;
var _didIteratorError3 = false;
var _iteratorError3 = undefined;
try {
for (var _iterator3 = residualBindings[Symbol.iterator](), _step3; !(_iteratorNormalCompletion3 = (_step3 = _iterator3.next()).done); _iteratorNormalCompletion3 = true) {
var _ref5 = _step3.value;
var _ref6 = _slicedToArray(_ref5, 2);
var _ref6$ = _ref6[1];
var declarativeEnvironmentRecord = _ref6$.declarativeEnvironmentRecord;
var value = _ref6$.value;
// if declarativeEnvironmentRecord is null, it's likely a global binding
// so we can assume that we can still hoist this function
if (declarativeEnvironmentRecord !== null) {
(0, _invariant2.default)(value instanceof _index.Value);
if (!canHoistValue(realm, value, residualHeapVisitor)) {
return false;
}
}
}
} catch (err) {
_didIteratorError3 = true;
_iteratorError3 = err;
} finally {
try {
if (!_iteratorNormalCompletion3 && _iterator3.return) {
_iterator3.return();
}
} finally {
if (_didIteratorError3) {
throw _iteratorError3;
}
}
}
realm.react.hoistableFunctions.set(func, true);
return true;
}
realm.react.hoistableFunctions.set(func, false);
return false;
}
function canHoistAbstract(realm, abstract, residualHeapVisitor) {
// get the scopes for this abstract value
var scopes = residualHeapVisitor.values.get(abstract);
// we can safely hoist abstracts that are created in the common scope
if (scopes !== undefined) {
var _iteratorNormalCompletion4 = true;
var _didIteratorError4 = false;
var _iteratorError4 = undefined;
try {
for (var _iterator4 = scopes[Symbol.iterator](), _step4; !(_iteratorNormalCompletion4 = (_step4 = _iterator4.next()).done); _iteratorNormalCompletion4 = true) {
var scope = _step4.value;
var currentAdditionalFunction = residualHeapVisitor.commonScope;
(0, _invariant2.default)(currentAdditionalFunction instanceof _index.FunctionValue);
if (scope === currentAdditionalFunction.parent) {
return true;
}
}
} catch (err) {
_didIteratorError4 = true;
_iteratorError4 = err;
} finally {
try {
if (!_iteratorNormalCompletion4 && _iterator4.return) {
_iterator4.return();
}
} finally {
if (_didIteratorError4) {
throw _iteratorError4;
}
}
}
}
return false;
}
function isPrimitive(realm, value) {
return value instanceof _index.StringValue || value instanceof _index.NumberValue || value instanceof _index.SymbolValue || value instanceof _index.BooleanValue || value === realm.intrinsics.null || value === realm.intrinsics.undefined;
}
function canHoistValue(realm, value, residualHeapVisitor) {
if (value instanceof _index.ArrayValue && canHoistArray(realm, value, residualHeapVisitor) || value instanceof _index.FunctionValue && canHoistFunction(realm, value, residualHeapVisitor) || value instanceof _index.ObjectValue && canHoistObject(realm, value, residualHeapVisitor) || value instanceof _index.AbstractValue && canHoistAbstract(realm, value, residualHeapVisitor) || isPrimitive(realm, value)) {
return true;
}
return false;
}
function canHoistReactElement(realm, reactElement, residualHeapVisitor) {
if (realm.react.hoistableReactElements.has(reactElement)) {
// cast because Flow thinks that we may have set a value to be something other than a boolean?
return realm.react.hoistableReactElements.get(reactElement);
}
if (residualHeapVisitor === undefined) {
return false;
}
var type = (0, _index2.Get)(realm, reactElement, "type");
var ref = (0, _index2.Get)(realm, reactElement, "ref");
var key = (0, _index2.Get)(realm, reactElement, "key");
var props = (0, _index2.Get)(realm, reactElement, "props");
if (canHoistValue(realm, type, residualHeapVisitor) &&
// we can't hoist string "refs" or if they're abstract, as they might be abstract strings
!(ref instanceof String || ref instanceof _index.AbstractValue) && canHoistValue(realm, ref, residualHeapVisitor) && canHoistValue(realm, key, residualHeapVisitor) && canHoistValue(realm, props, residualHeapVisitor)) {
realm.react.hoistableReactElements.set(reactElement, true);
return true;
}
realm.react.hoistableReactElements.set(reactElement, false);
return false;
}
//# sourceMappingURL=hoisting.js.map