[async-iteration] implement Async-from-Sync Iterator

src/builtins/builtins.h

 // Copyright 2011 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_H_
 #define V8_BUILTINS_BUILTINS_H_
 
 #include "src/base/flags.h"
 #include "src/globals.h"
 
@@ skipping 828 matching lines @@
   TFS(ThrowWasmTrapMemOutOfBounds, BUILTIN, kNoExtraICState, WasmRuntimeCall,  \
       1)                                                                       \
   TFS(ThrowWasmTrapDivByZero, BUILTIN, kNoExtraICState, WasmRuntimeCall, 1)    \
   TFS(ThrowWasmTrapDivUnrepresentable, BUILTIN, kNoExtraICState,               \
       WasmRuntimeCall, 1)                                                      \
   TFS(ThrowWasmTrapRemByZero, BUILTIN, kNoExtraICState, WasmRuntimeCall, 1)    \
   TFS(ThrowWasmTrapFloatUnrepresentable, BUILTIN, kNoExtraICState,             \
       WasmRuntimeCall, 1)                                                      \
   TFS(ThrowWasmTrapFuncInvalid, BUILTIN, kNoExtraICState, WasmRuntimeCall, 1)  \
   TFS(ThrowWasmTrapFuncSigMismatch, BUILTIN, kNoExtraICState, WasmRuntimeCall, \
-      1)
+      1)                                                                       \
+                                                                               \
+  /* Async-from-Sync Iterator */                                               \
+                                                                               \
+  /* %AsyncFromSyncIteratorPrototype% */                                       \
+  /* (proposal-async-iteration/#sec-%asyncfromsynciteratorprototype%-object)*/ \
+  TFJ(AsyncFromSyncIteratorPrototypeNext, 1)                                   \
+  TFJ(AsyncFromSyncIteratorPrototypeThrow, 1)                                  \
+  TFJ(AsyncFromSyncIteratorPrototypeReturn, 1)                                 \
+                                                                               \
+  /* proposal-async-iteration/#sec-async-iterator-value-unwrap-functions */    \
+  TFJ(AsyncIteratorValueUnwrap, 1)
 
 #define IGNORE_BUILTIN(...)
 
 #define BUILTIN_LIST_ALL(V) BUILTIN_LIST(V, V, V, V, V, V, V)
 
 #define BUILTIN_LIST_C(V)                                            \
   BUILTIN_LIST(V, V, IGNORE_BUILTIN, IGNORE_BUILTIN, IGNORE_BUILTIN, \
                IGNORE_BUILTIN, IGNORE_BUILTIN)
 
 #define BUILTIN_LIST_A(V)                                                      \
@@ skipping 134 matching lines @@
 
   friend class Isolate;
 
   DISALLOW_COPY_AND_ASSIGN(Builtins);
 };
 
 }  // namespace internal
 }  // namespace v8
 
 #endif  // V8_BUILTINS_BUILTINS_H_