// 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)) }; } } }