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SetPrototype.js
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331 lines (262 loc) · 8.98 KB
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/*
* Copyright (C) 2016 Yusuke Suzuki <utatane.tea@gmail.com>.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY APPLE INC. ``AS IS'' AND ANY
* EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR
* CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
* EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
* PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
* PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY
* OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
function forEach(callback /*, thisArg */)
{
"use strict";
if (!@isSet(this))
@throwTypeError("Set operation called on non-Set object");
if (!@isCallable(callback))
@throwTypeError("Set.prototype.forEach callback must be a function");
var thisArg = @argument(1);
var bucket = @setBucketHead(this);
do {
bucket = @setBucketNext(bucket);
if (bucket === @sentinelSetBucket)
break;
var key = @setBucketKey(bucket);
callback.@call(thisArg, key, key, this);
} while (true);
}
// https://tc39.es/proposal-set-methods/#sec-getsetrecord (steps 1-7)
@linkTimeConstant
@alwaysInline
function getSetSizeAsInt(other)
{
if (!@isObject(other))
@throwTypeError("Set operation expects first argument to be an object");
var size = @toNumber(other.size);
if (size !== size) // is NaN?
@throwTypeError("Set operation expects first argument to have non-NaN 'size' property");
var sizeInt = @toIntegerOrInfinity(size);
if (sizeInt < 0)
@throwRangeError("Set operation expects first argument to have non-negative 'size' property");
return sizeInt;
}
function union(other)
{
"use strict";
if (!@isSet(this))
@throwTypeError("Set operation called on non-Set object");
// Get Set Record
var size = @getSetSizeAsInt(other); // unused but @getSetSizeAsInt call is observable
var has = other.has;
if (!@isCallable(has))
@throwTypeError("Set.prototype.union expects other.has to be callable");
var keys = other.keys;
if (!@isCallable(keys))
@throwTypeError("Set.prototype.union expects other.keys to be callable");
var iterator = keys.@call(other, keys);
var wrapper = {
@@iterator: function () { return iterator; }
};
var result = @setClone(this);
for (var key of wrapper)
result.@add(key);
return result;
}
function intersection(other)
{
"use strict";
if (!@isSet(this))
@throwTypeError("Set operation called on non-Set object");
// Get Set Record
var size = @getSetSizeAsInt(other);
var has = other.has;
if (!@isCallable(has))
@throwTypeError("Set.prototype.intersection expects other.has to be callable");
var keys = other.keys;
if (!@isCallable(keys))
@throwTypeError("Set.prototype.intersection expects other.keys to be callable");
var result = new @Set();
if (this.@size <= size) {
var bucket = @setBucketHead(this);
do {
bucket = @setBucketNext(bucket);
if (bucket === @sentinelSetBucket)
break;
var key = @setBucketKey(bucket);
if (has.@call(other, key))
result.@add(key);
} while (true);
} else {
var iterator = keys.@call(other, keys);
var wrapper = {
@@iterator: function () { return iterator; }
};
for (var key of wrapper) {
if (this.@has(key))
result.@add(key);
}
}
return result;
}
function difference(other)
{
"use strict";
if (!@isSet(this))
@throwTypeError("Set operation called on non-Set object");
// Get Set Record
var size = @getSetSizeAsInt(other);
var has = other.has;
if (!@isCallable(has))
@throwTypeError("Set.prototype.difference expects other.has to be callable");
var keys = other.keys;
if (!@isCallable(keys))
@throwTypeError("Set.prototype.difference expects other.keys to be callable");
var result = @setClone(this);
if (this.@size <= size) {
var bucket = @setBucketHead(this);
while (true) {
bucket = @setBucketNext(bucket);
if (bucket === @sentinelSetBucket)
break;
var key = @setBucketKey(bucket);
if (has.@call(other, key))
result.@delete(key);
}
} else {
var iterator = keys.@call(other, keys);
var wrapper = {
@@iterator: function () { return iterator; }
};
for (var key of wrapper) {
if (this.@has(key))
result.@delete(key);
}
}
return result;
}
function symmetricDifference(other)
{
"use strict";
if (!@isSet(this))
@throwTypeError("Set operation called on non-Set object");
// Get Set Record
var size = @getSetSizeAsInt(other); // unused but @getSetSizeAsInt call is observable
var has = other.has;
if (!@isCallable(has))
@throwTypeError("Set.prototype.symmetricDifference expects other.has to be callable");
var keys = other.keys;
if (!@isCallable(keys))
@throwTypeError("Set.prototype.symmetricDifference expects other.keys to be callable");
var iterator = keys.@call(other, keys);
var wrapper = {
@@iterator: function () { return iterator; }
};
var result = @setClone(this);
for (var key of wrapper) {
if (this.@has(key))
result.@delete(key);
else
result.@add(key);
}
return result;
}
function isSubsetOf(other)
{
"use strict";
if (!@isSet(this))
@throwTypeError("Set operation called on non-Set object");
// Get Set Record
var size = @getSetSizeAsInt(other);
var has = other.has;
if (!@isCallable(has))
@throwTypeError("Set.prototype.isSubsetOf expects other.has to be callable");
var keys = other.keys;
if (!@isCallable(keys))
@throwTypeError("Set.prototype.isSubsetOf expects other.keys to be callable");
if (this.@size > size)
return false;
var bucket = @setBucketHead(this);
do {
bucket = @setBucketNext(bucket);
if (bucket === @sentinelSetBucket)
break;
var key = @setBucketKey(bucket);
if (!has.@call(other, key))
return false;
} while (true);
return true;
}
function isSupersetOf(other)
{
"use strict";
if (!@isSet(this))
@throwTypeError("Set operation called on non-Set object");
// Get Set Record
var size = @getSetSizeAsInt(other);
var has = other.has;
if (!@isCallable(has))
@throwTypeError("Set.prototype.isSupersetOf expects other.has to be callable");
var keys = other.keys;
if (!@isCallable(keys))
@throwTypeError("Set.prototype.isSupersetOf expects other.keys to be callable");
if (this.@size < size)
return false;
var iterator = keys.@call(other, keys);
var wrapper = {
@@iterator: function () { return iterator; }
};
for (var key of wrapper) {
if (!this.@has(key))
return false;
}
return true;
}
function isDisjointFrom(other)
{
"use strict";
if (!@isSet(this))
@throwTypeError("Set operation called on non-Set object");
// Get Set Record
var size = @getSetSizeAsInt(other);
var has = other.has;
if (!@isCallable(has))
@throwTypeError("Set.prototype.isDisjointFrom expects other.has to be callable");
var keys = other.keys;
if (!@isCallable(keys))
@throwTypeError("Set.prototype.isDisjointFrom expects other.keys to be callable");
if (this.@size <= size) {
var bucket = @setBucketHead(this);
do {
bucket = @setBucketNext(bucket);
if (bucket === @sentinelSetBucket)
break;
var key = @setBucketKey(bucket);
if (has.@call(other, key))
return false;
} while (true);
} else {
var iterator = keys.@call(other, keys);
var wrapper = {
@@iterator: function () { return iterator; }
};
for (var key of wrapper) {
if (this.@has(key))
return false;
}
}
return true;
}