prepack/lib/intrinsics/ecma262/SetPrototype.js

Execute a JS bundle, serialize global state and side effects to a snapshot that can be quickly restored.

"use strict";

Object.defineProperty(exports, "__esModule", {
  value: true
});

exports.default = function (realm, obj) {
  // ECMA262 23.2.3.1
  obj.defineNativeMethod("add", 1, (context, [value]) => {
    // 1. Let S be the this value.
    let S = context.throwIfNotConcrete();

    // 2. If Type(S) is not Object, throw a TypeError exception.
    if (!(S instanceof _index.ObjectValue)) {
      throw realm.createErrorThrowCompletion(realm.intrinsics.TypeError);
    }

    // 3. If S does not have a [[SetData]] internal slot, throw a TypeError exception.
    if (!S.$SetData) {
      throw realm.createErrorThrowCompletion(realm.intrinsics.TypeError);
    }

    // 4. Let entries be the List that is the value of S's [[SetData]] internal slot.
    realm.recordModifiedProperty(S.$SetData_binding);
    let entries = S.$SetData;
    (0, _invariant2.default)(entries !== undefined);

    // 5. Repeat for each e that is an element of entries,
    for (let e of entries) {
      // a. If e is not empty and SameValueZero(e, value) is true, then
      if (e && (0, _index2.SameValueZeroPartial)(realm, e, value)) {
        // i. Return S.
        return S;
      }
    }

    // 6. If value is -0, let value be +0.
    value = value.throwIfNotConcrete();
    if (value instanceof _index.NumberValue && Object.is(value.value, -0)) {
      value = realm.intrinsics.zero;
    }

    // 7. Append value as the last element of entries.
    entries.push(value);

    // 8. Return S.
    return S;
  });

  // ECMA262 23.2.3.2
  obj.defineNativeMethod("clear", 0, context => {
    // 1. Let S be the this value.
    let S = context.throwIfNotConcrete();

    // 2. If Type(S) is not Object, throw a TypeError exception.
    if (!(S instanceof _index.ObjectValue)) {
      throw realm.createErrorThrowCompletion(realm.intrinsics.TypeError);
    }

    // 3. If S does not have a [[SetData]] internal slot, throw a TypeError exception.
    if (!S.$SetData) {
      throw realm.createErrorThrowCompletion(realm.intrinsics.TypeError);
    }

    // All of these steps can be replace with just reseting [[SetData]]
    // 4. Let entries be the List that is the value of S's [[SetData]] internal slot.
    // 5. Repeat for each e that is an element of entries,
    // 5.a Replace the element of entries whose value is e with an element whose value is empty.
    realm.recordModifiedProperty(S.$SetData_binding);
    S.$SetData = [];

    // 6. Return undefined.
    return realm.intrinsics.undefined;
  });

  // ECMA262 23.2.3.4
  obj.defineNativeMethod("delete", 1, (context, [value]) => {
    // 1. Let S be the this value.
    let S = context.throwIfNotConcrete();

    // 2. If Type(S) is not Object, throw a TypeError exception.
    if (!(S instanceof _index.ObjectValue)) {
      throw realm.createErrorThrowCompletion(realm.intrinsics.TypeError);
    }

    // 3. If S does not have a [[SetData]] internal slot, throw a TypeError exception.
    if (!S.$SetData) {
      throw realm.createErrorThrowCompletion(realm.intrinsics.TypeError);
    }

    // 4. Let entries be the List that is the value of S's [[SetData]] internal slot.
    realm.recordModifiedProperty(S.$SetData_binding);
    let entries = S.$SetData;
    (0, _invariant2.default)(entries !== undefined);

    // 5. Repeat for each e that is an element of entries,
    for (let i = 0; i < entries.length; i++) {
      let e = entries[i];

      // a. If e is not empty and SameValueZero(e, value) is true, then
      if (e !== undefined && (0, _index2.SameValueZeroPartial)(realm, e, value)) {
        // i. Replace the element of entries whose value is e with an element whose value is empty.
        entries[i] = undefined;

        // ii. Return true.
        return realm.intrinsics.true;
      }
    }

    // 6. Return false.
    return realm.intrinsics.false;
  });

  // ECMA262 23.2.3.5
  obj.defineNativeMethod("entries", 0, context => {
    // 1. Let S be the this value.
    let S = context;

    // 2. Return ? CreateSetIterator(S, "key+value").
    return (0, _index2.CreateSetIterator)(realm, S, "key+value");
  });

  // ECMA262 23.2.3.6
  obj.defineNativeMethod("forEach", 1, (context, [callbackfn, thisArg]) => {
    // 1. Let S be the this value.
    let S = context.throwIfNotConcrete();

    // 2. If Type(S) is not Object, throw a TypeError exception.
    if (!(S instanceof _index.ObjectValue)) {
      throw realm.createErrorThrowCompletion(realm.intrinsics.TypeError);
    }

    // 3. If S does not have a [[SetData]] internal slot, throw a TypeError exception.
    if (!S.$SetData) {
      throw realm.createErrorThrowCompletion(realm.intrinsics.TypeError);
    }

    // 4. If IsCallable(callbackfn) is false, throw a TypeError exception.
    if (!(0, _index2.IsCallable)(realm, callbackfn)) {
      throw realm.createErrorThrowCompletion(realm.intrinsics.TypeError);
    }

    // 5. If thisArg was supplied, let T be thisArg; else let T be undefined.
    let T = thisArg || realm.intrinsics.undefined;

    // 6. Let entries be the List that is the value of S's [[SetData]] internal slot.
    let entries = S.$SetData;
    (0, _invariant2.default)(entries);

    // 7. Repeat for each e that is an element of entries, in original insertion order
    for (let e of entries) {
      // a. If e is not empty, then
      if (e) {
        // i. Perform ? Call(callbackfn, T, « e, e, S »).
        (0, _index2.Call)(realm, callbackfn, T, [e, e, S]);
      }
    }

    // 8. Return undefined.
    return realm.intrinsics.undefined;
  });

  // ECMA262 23.2.3.7
  obj.defineNativeMethod("has", 1, (context, [value]) => {
    // 1. Let S be the this value.
    let S = context.throwIfNotConcrete();

    // 2. If Type(S) is not Object, throw a TypeError exception.
    if (!(S instanceof _index.ObjectValue)) {
      throw realm.createErrorThrowCompletion(realm.intrinsics.TypeError);
    }

    // 3. If S does not have a [[SetData]] internal slot, throw a TypeError exception.
    if (!S.$SetData) {
      throw realm.createErrorThrowCompletion(realm.intrinsics.TypeError);
    }

    // 4. Let entries be the List that is the value of S's [[SetData]] internal slot.
    let entries = S.$SetData;

    // 5. Repeat for each e that is an element of entries,
    for (let e of entries) {
      // a. If e is not empty and SameValueZero(e, value) is true, return true.
      if (e && (0, _index2.SameValueZeroPartial)(realm, e, value)) return realm.intrinsics.true;
    }

    // 6. Return false.
    return realm.intrinsics.false;
  });

  // ECMA262 23.2.3.9 get Set.prototype.size
  obj.$DefineOwnProperty("size", {
    get: new _index.NativeFunctionValue(realm, undefined, "get size", 0, context => {
      // 1. Let S be the this value.
      let S = context.throwIfNotConcrete();

      // 2. If Type(S) is not Object, throw a TypeError exception.
      if (!(S instanceof _index.ObjectValue)) {
        throw realm.createErrorThrowCompletion(realm.intrinsics.TypeError);
      }

      // 3. If S does not have a [[SetData]] internal slot, throw a TypeError exception.
      if (!S.$SetData) {
        throw realm.createErrorThrowCompletion(realm.intrinsics.TypeError);
      }

      // 4. Let entries be the List that is the value of S's [[SetData]] internal slot.
      let entries = S.$SetData;

      // 5. Let count be 0.
      let count = 0;

      // 6. For each e that is an element of entries
      for (let e of entries) {
        // a. If e is not empty, set count to count+1.
        if (e) count++;
      }

      // 7. Return count.
      return new _index.NumberValue(realm, count);
    }),
    configurable: true
  });

  // ECMA262 23.2.3.10
  obj.defineNativeMethod("values", 0, context => {
    // 1. Let S be the this value.
    let S = context;

    // 2. Return ? CreateSetIterator(S, "value").
    return (0, _index2.CreateSetIterator)(realm, S, "value");
  });

  // ECMA262 23.2.3.8
  let valuesPropertyDescriptor = obj.$GetOwnProperty("values");
  (0, _invariant2.default)(valuesPropertyDescriptor);
  _singletons.Properties.ThrowIfMightHaveBeenDeleted(valuesPropertyDescriptor.value);
  obj.defineNativeProperty("keys", undefined, valuesPropertyDescriptor);

  // ECMA262 23.2.3.11
  obj.defineNativeProperty(realm.intrinsics.SymbolIterator, undefined, valuesPropertyDescriptor);

  // ECMA262 23.2.3.12 Set.prototype [ @@toStringTag ]
  obj.defineNativeProperty(realm.intrinsics.SymbolToStringTag, new _index.StringValue(realm, "Set"), { writable: false });
};

var _index = require("../../values/index.js");

var _index2 = require("../../methods/index.js");

var _singletons = require("../../singletons.js");

var _invariant = require("../../invariant.js");

var _invariant2 = _interopRequireDefault(_invariant);

function _interopRequireDefault(obj) { return obj && obj.__esModule ? obj : { default: obj }; }
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