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// Copyright 2019 the V8 project authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#include 'src/builtins/builtins-typed-array-gen.h'
namespace typed_array {
const kBuiltinNameOf: constexpr string = '%TypedArray%.of';
// %TypedArray%.of ( ...items )
// https://tc39.github.io/ecma262/#sec-%typedarray%.of
transitioning javascript builtin
TypedArrayOf(js-implicit context: NativeContext, receiver: JSAny)(
...arguments): JSTypedArray {
try {
// 1. Let len be the actual number of arguments passed to this function.
const len: uintptr = Unsigned(arguments.length);
// 2. Let items be the List of arguments passed to this function.
// 3. Let C be the this value.
// 4. If IsConstructor(C) is false, throw a TypeError exception.
const constructor = Cast<Constructor>(receiver) otherwise NotConstructor;
// 5. Let newObj be ? TypedArrayCreate(C, len).
const newObj = TypedArrayCreateByLength(
constructor, Convert<Number>(len), kBuiltinNameOf);
const accessor: TypedArrayAccessor =
GetTypedArrayAccessor(newObj.elements_kind);
// 6. Let k be 0.
// 7. Repeat, while k < len
for (let k: uintptr = 0; k < len; k++) {
// 7a. Let kValue be items[k].
const kValue: JSAny = arguments[Signed(k)];
// 7b. Let Pk be ! ToString(k).
// 7c. Perform ? Set(newObj, Pk, kValue, true).
// Buffer may be detached during executing ToNumber/ToBigInt.
accessor.StoreJSAny(context, newObj, k, kValue) otherwise IfDetached;
// 7d. Increase k by 1. (done by the loop).
}
// 8. Return newObj.
return newObj;
}
label NotConstructor deferred {
ThrowTypeError(MessageTemplate::kNotConstructor, receiver);
}
label IfDetached deferred {
ThrowTypeError(MessageTemplate::kDetachedOperation, kBuiltinNameOf);
}
}
}
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