[WIP Prototype] ES6 https://html.spec.whatwg.org/#fetch-a-single-module-script implementation

third_party/WebKit/Source/core/dom/ModuleScript.h

+// Copyright 2017 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 ModuleScript_h
+#define ModuleScript_h
+
+#include "bindings/core/v8/ScriptModule.h"
+#include "bindings/core/v8/ScriptValue.h"
+#include "platform/heap/Handle.h"
+#include "platform/weborigin/KURL.h"
+#include "public/platform/WebURLRequest.h"
+
+namespace blink {
+
+// https://html.spec.whatwg.org/multipage/webappapis.html#concept-module-script-instantiation-state
+enum class InstantiationState {
+  Uninstantiated,
+  Errored,
+  Instantiated,
+};
+
+// ModuleScript is a model object for the "module script" spec concept.
+// https://html.spec.whatwg.org/multipage/webappapis.html#module-script
+class ModuleScript final : public GarbageCollectedFinalized<ModuleScript> {
+ public:
+  static ModuleScript* create(ScriptModule record, const KURL& baseURL) {
+    return new ModuleScript(record, baseURL);
+  }
+  ~ModuleScript() = default;
+
+  ScriptModule record() { return m_record; }
+  const KURL& baseURL() { return m_baseURL; }
+
+  InstantiationState instantiationState() const { return m_instantiationState; }
+  void updateStateAfterInstantiation(ScriptValue maybeError);
+
+  void propagateUpstreamError(ScriptValue error);
+  void propagateUpstreamSuccess();
+
+  ScriptValue instantiationError() const { return m_instantiationError; }
+
+  DEFINE_INLINE_TRACE() {}
+
+ private:
+  ModuleScript(ScriptModule record, const KURL& baseURL)
+      : m_record(record), m_baseURL(baseURL) {}
+
+  // https://html.spec.whatwg.org/multipage/webappapis.html#concept-module-script-module-record
+  ScriptModule m_record;
+
+  // https://html.spec.whatwg.org/multipage/webappapis.html#concept-module-script-base-url
+  const KURL m_baseURL;
+
+  // https://html.spec.whatwg.org/multipage/webappapis.html#concept-module-script-instantiation-state
+  InstantiationState m_instantiationState = InstantiationState::Uninstantiated;
+
+  // https://html.spec.whatwg.org/multipage/webappapis.html#concept-module-script-instantiation-error
+  ScriptValue m_instantiationError;
+
+  // https://html.spec.whatwg.org/multipage/webappapis.html#concept-module-script-credentials-mode
+  // const WebURLRequest::FetchCredentialsMode m_credentialsMode;
+
+  // https://html.spec.whatwg.org/multipage/webappapis.html#concept-module-script-nonce
+  // const String m_nonce;
+
+  // https://html.spec.whatwg.org/multipage/webappapis.html#concept-module-script-parser
+  // const ParserDisposition m_parserState;
+};
+
+}  // namespace blink
+
+#endif