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// Copyright 2018 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-collections-gen.h'
namespace collections {
@export
macro LoadKeyValuePairNoSideEffects(implicit context: Context)(o: JSAny):
KeyValuePair labels MayHaveSideEffects {
typeswitch (o) {
case (a: FastJSArray): {
const length: Smi = a.length;
typeswitch (a.elements) {
case (elements: FixedArray): {
return KeyValuePair{
key: length > 0 ? array::LoadElementOrUndefined(elements, 0) :
Undefined,
value: length > 1 ? array::LoadElementOrUndefined(elements, 1) :
Undefined
};
}
case (elements: FixedDoubleArray): {
return KeyValuePair{
key: length > 0 ? array::LoadElementOrUndefined(elements, 0) :
Undefined,
value: length > 1 ? array::LoadElementOrUndefined(elements, 1) :
Undefined
};
}
case (FixedArrayBase): deferred {
unreachable;
}
}
}
case (JSReceiver): {
goto MayHaveSideEffects;
}
case (o: JSAny): deferred {
ThrowTypeError(MessageTemplate::kIteratorValueNotAnObject, o);
}
}
}
@export
transitioning macro LoadKeyValuePair(implicit context: Context)(o: JSAny):
KeyValuePair {
try {
return LoadKeyValuePairNoSideEffects(o) otherwise Generic;
} label Generic {
return KeyValuePair{
key: GetProperty(o, Convert<Smi>(0)),
value: GetProperty(o, Convert<Smi>(1))
};
}
}
}
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