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// Copyright 2017 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.
#ifndef V8_BUILTINS_BUILTINS_ITERATOR_GEN_H_
#define V8_BUILTINS_BUILTINS_ITERATOR_GEN_H_
#include "src/codegen/code-stub-assembler.h"
namespace v8 {
namespace internal {
using compiler::Node;
class IteratorBuiltinsAssembler : public CodeStubAssembler {
public:
explicit IteratorBuiltinsAssembler(compiler::CodeAssemblerState* state)
: CodeStubAssembler(state) {}
using IteratorRecord = TorqueStructIteratorRecord;
// Returns object[Symbol.iterator].
TNode<Object> GetIteratorMethod(Node* context, Node* object);
// https://tc39.github.io/ecma262/#sec-getiterator --- never used for
// @@asyncIterator.
IteratorRecord GetIterator(Node* context, Node* object,
Label* if_exception = nullptr,
Variable* exception = nullptr);
IteratorRecord GetIterator(Node* context, Node* object, Node* method,
Label* if_exception = nullptr,
Variable* exception = nullptr);
// https://tc39.github.io/ecma262/#sec-iteratorstep
// If the iterator is done, goto {if_done}, otherwise returns an iterator
// result.
// `fast_iterator_result_map` refers to the map for the JSIteratorResult
// object, loaded from the native context.
TNode<JSReceiver> IteratorStep(
TNode<Context> context, const IteratorRecord& iterator, Label* if_done,
base::Optional<TNode<Map>> fast_iterator_result_map = base::nullopt,
Label* if_exception = nullptr, Variable* exception = nullptr);
TNode<JSReceiver> IteratorStep(
TNode<Context> context, const IteratorRecord& iterator,
base::Optional<TNode<Map>> fast_iterator_result_map, Label* if_done) {
return IteratorStep(context, iterator, if_done, fast_iterator_result_map);
}
// https://tc39.github.io/ecma262/#sec-iteratorvalue
// Return the `value` field from an iterator.
// `fast_iterator_result_map` refers to the map for the JSIteratorResult
// object, loaded from the native context.
TNode<Object> IteratorValue(
TNode<Context> context, TNode<JSReceiver> result,
base::Optional<TNode<Map>> fast_iterator_result_map = base::nullopt,
Label* if_exception = nullptr, Variable* exception = nullptr);
// https://tc39.github.io/ecma262/#sec-iteratorclose
void IteratorCloseOnException(Node* context, const IteratorRecord& iterator,
Label* if_exception, Variable* exception);
void IteratorCloseOnException(Node* context, const IteratorRecord& iterator,
TNode<Object> exception);
// #sec-iterabletolist
// Build a JSArray by iterating over {iterable} using {iterator_fn},
// following the ECMAscript operation with the same name.
TNode<JSArray> IterableToList(TNode<Context> context, TNode<Object> iterable,
TNode<Object> iterator_fn);
// Currently at https://tc39.github.io/proposal-intl-list-format/
// #sec-createstringlistfromiterable
TNode<JSArray> StringListFromIterable(TNode<Context> context,
TNode<Object> iterable);
void FastIterableToList(TNode<Context> context, TNode<Object> iterable,
TVariable<Object>* var_result, Label* slow);
};
} // namespace internal
} // namespace v8
#endif // V8_BUILTINS_BUILTINS_ITERATOR_GEN_H_
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