js-generator.tq

// 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.

extern class JSGeneratorObject extends JSObject {
  function: JSFunction;
  context: Context;
  receiver: JSAny;

  // For executing generators: the most recent input value.
  // For suspended generators: debug information (bytecode offset).
  // There is currently no need to remember the most recent input value for a
  // suspended generator.
  input_or_debug_pos: Object;

  // The most recent resume mode.
  resume_mode: Smi;

  // A positive value indicates a suspended generator.  The special
  // kGeneratorExecuting and kGeneratorClosed values indicate that a generator
  // cannot be resumed.
  continuation: Smi;

  // Saved interpreter register file.
  parameters_and_registers: FixedArray;
}

extern class JSAsyncFunctionObject extends JSGeneratorObject {
  promise: JSPromise;
}

extern class JSAsyncGeneratorObject extends JSGeneratorObject {
  // Pointer to the head of a singly linked list of AsyncGeneratorRequest, or
  // undefined.
  queue: HeapObject;
  // Whether or not the generator is currently awaiting.
  is_awaiting: Smi;
}

extern class AsyncGeneratorRequest extends Struct {
  next: AsyncGeneratorRequest|Undefined;
  resume_mode: Smi;
  value: Object;
  promise: JSPromise;
}