Response construction with a ReadableStream

third_party/WebKit/Source/bindings/core/v8/V8IteratorResultValue.h

 // Copyright 2014 The Chromium 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 V8IteratorResultValue_h
 #define V8IteratorResultValue_h
 
 #include "bindings/core/v8/ScriptValue.h"
 #include "bindings/core/v8/ToV8.h"
 #include "core/CoreExport.h"
 #include <v8.h>
 
 namespace blink {
 
 CORE_EXPORT v8::Local<v8::Object> v8IteratorResultValue(v8::Isolate*, bool done, v8::Local<v8::Value>);
 
+// Unpacks |item|, stores the value of "done" member to |done| and returns
+// the value of "value" member. Returns an empty handle when errored.
+CORE_EXPORT v8::MaybeLocal<v8::Value> v8IterationItemUnpack(ScriptState*, v8::Local<v8::Object> item, bool* done);

[haraken, 2015/12/10 14:24:35]

v8IterationItemUnpack => v8UnpackIteratorResultValue or v8GetIteratorResultValue
?

[yhirano, 2015/12/11 03:27:18]

Fixed.

Here "iterator result" means an object having two members "done" and 
"value".

 - v8IteratorResultValue takes a value and returns {done: true, value}.
 - v8IteratorResultDone returns {done: false}.
 - v8UnpackIteratorResult takes an iterator result and returns its done and
value members.

Makes sense?

[yhirano, 2015/12/11 03:42:56]

correction:
 - v8IteratorResult takes a value and returns {done: true, value}.
 - v8IteratorResultDone returns {done: false}.
 - v8IteratorResultValue takes two values for done and value members and returns
{done, value}.
 - v8UnpackIteratorResult takes an iterator result and returns its done and
value members.

+
 template<typename T>
 inline ScriptValue v8IteratorResult(ScriptState* scriptState, const T& value)
 {
     return ScriptValue(
         scriptState,
         v8IteratorResultValue(
             scriptState->isolate(),
             false,
             toV8(value, scriptState->context()->Global(), scriptState->isolate())));
 }
 
 inline ScriptValue v8IteratorResultDone(ScriptState* scriptState)
 {
     return ScriptValue(
         scriptState,
         v8IteratorResultValue(
             scriptState->isolate(),
             true,
             v8::Undefined(scriptState->isolate())));
 }
 
 } // namespace blink
 
 #endif // V8IteratorResultValue_h