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Normative: remove Symbol.species from InitializeTypedArrayFromTypedArray #2719

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Apr 13, 2022
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Normative: remove Symbol.species from InitializeTypedArrayFromTypedArray #2719

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17 changes: 5 additions & 12 deletions spec.html
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Original file line number Diff line number Diff line change
Expand Up @@ -39079,8 +39079,7 @@ <h1>
1. Else, let _same_ be SameValue(_srcBuffer_, _targetBuffer_).
1. If _same_ is *true*, then
1. Let _srcByteLength_ be _source_.[[ByteLength]].
1. Set _srcBuffer_ to ? <emu-meta suppress-effects="user-code">CloneArrayBuffer(_srcBuffer_, _srcByteOffset_, _srcByteLength_, %ArrayBuffer%)</emu-meta>.
1. NOTE: %ArrayBuffer% is used to clone _srcBuffer_ because is it known to not have any observable side-effects.
1. Set _srcBuffer_ to ? CloneArrayBuffer(_srcBuffer_, _srcByteOffset_, _srcByteLength_).
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1. Let _srcByteIndex_ be 0.
1. Else, let _srcByteIndex_ be _srcByteOffset_.
1. Let _targetByteIndex_ be _targetOffset_ &times; _targetElementSize_ + _targetByteOffset_.
Expand Down Expand Up @@ -39494,15 +39493,10 @@ <h1>
1. Let _srcByteOffset_ be _srcArray_.[[ByteOffset]].
1. Let _elementLength_ be _srcArray_.[[ArrayLength]].
1. Let _byteLength_ be _elementSize_ &times; _elementLength_.
1. If IsSharedArrayBuffer(_srcData_) is *false*, then
1. Let _bufferConstructor_ be ? SpeciesConstructor(_srcData_, %ArrayBuffer%).
1. Else,
1. Let _bufferConstructor_ be %ArrayBuffer%.
1. If _elementType_ is the same as _srcType_, then
1. Let _data_ be ? CloneArrayBuffer(_srcData_, _srcByteOffset_, _byteLength_, _bufferConstructor_).
1. Let _data_ be ? CloneArrayBuffer(_srcData_, _srcByteOffset_, _byteLength_).
1. Else,
1. Let _data_ be ? AllocateArrayBuffer(_bufferConstructor_, _byteLength_).
1. If IsDetachedBuffer(_srcData_) is *true*, throw a *TypeError* exception.
1. Let _data_ be ? <emu-meta suppress-effects="user-code">AllocateArrayBuffer(%ArrayBuffer%, _byteLength_)</emu-meta>.
1. If _srcArray_.[[ContentType]] &ne; _O_.[[ContentType]], throw a *TypeError* exception.
1. Let _srcByteIndex_ be _srcByteOffset_.
1. Let _targetByteIndex_ be 0.
Expand Down Expand Up @@ -40670,16 +40664,15 @@ <h1>
_srcBuffer_: an ArrayBuffer or a SharedArrayBuffer,
_srcByteOffset_: a non-negative integer,
_srcLength_: a non-negative integer,
_cloneConstructor_: a constructor,
): either a normal completion containing an ArrayBuffer or an abrupt completion
</h1>
<dl class="header">
<dt>description</dt>
<dd>It creates a new ArrayBuffer whose data is a copy of _srcBuffer_'s data over the range starting at _srcByteOffset_ and continuing for _srcLength_ bytes.</dd>
</dl>
<emu-alg>
1. Let _targetBuffer_ be ? AllocateArrayBuffer(_cloneConstructor_, _srcLength_).
1. If IsDetachedBuffer(_srcBuffer_) is *true*, throw a *TypeError* exception.
1. Assert: IsDetachedBuffer(_srcBuffer_) is *false*.
1. Let _targetBuffer_ be ? <emu-meta suppress-effects="user-code">AllocateArrayBuffer(%ArrayBuffer%, _srcLength_)</emu-meta>.
1. Let _srcBlock_ be _srcBuffer_.[[ArrayBufferData]].
1. Let _targetBlock_ be _targetBuffer_.[[ArrayBufferData]].
1. Perform CopyDataBlockBytes(_targetBlock_, 0, _srcBlock_, _srcByteOffset_, _srcLength_).
Expand Down