--- /dev/null
+/*********************************************************************
+ * NAN - Native Abstractions for Node.js
+ *
+ * Copyright (c) 2018 NAN contributors
+ *
+ * MIT License <https://github.com/nodejs/nan/blob/master/LICENSE.md>
+ ********************************************************************/
+
+#ifndef NAN_MAYBE_PRE_43_INL_H_
+#define NAN_MAYBE_PRE_43_INL_H_
+
+template<typename T>
+class MaybeLocal {
+ public:
+ inline MaybeLocal() : val_(v8::Local<T>()) {}
+
+ template<typename S>
+# if NODE_MODULE_VERSION >= NODE_0_12_MODULE_VERSION
+ inline
+ MaybeLocal(v8::Local<S> that) : val_(that) {} // NOLINT(runtime/explicit)
+# else
+ inline
+ MaybeLocal(v8::Local<S> that) : // NOLINT(runtime/explicit)
+ val_(*reinterpret_cast<v8::Local<T>*>(&that)) {}
+# endif
+
+ inline bool IsEmpty() const { return val_.IsEmpty(); }
+
+ template<typename S>
+ inline bool ToLocal(v8::Local<S> *out) const {
+ *out = val_;
+ return !IsEmpty();
+ }
+
+ inline v8::Local<T> ToLocalChecked() const {
+#if defined(V8_ENABLE_CHECKS)
+ assert(!IsEmpty() && "ToLocalChecked is Empty");
+#endif // V8_ENABLE_CHECKS
+ return val_;
+ }
+
+ template<typename S>
+ inline v8::Local<S> FromMaybe(v8::Local<S> default_value) const {
+ return IsEmpty() ? default_value : v8::Local<S>(val_);
+ }
+
+ private:
+ v8::Local<T> val_;
+};
+
+inline
+MaybeLocal<v8::String> ToDetailString(v8::Handle<v8::Value> val) {
+ return MaybeLocal<v8::String>(val->ToDetailString());
+}
+
+inline
+MaybeLocal<v8::Uint32> ToArrayIndex(v8::Handle<v8::Value> val) {
+ return MaybeLocal<v8::Uint32>(val->ToArrayIndex());
+}
+
+inline
+Maybe<bool> Equals(v8::Handle<v8::Value> a, v8::Handle<v8::Value>(b)) {
+ return Just<bool>(a->Equals(b));
+}
+
+inline
+MaybeLocal<v8::Object> NewInstance(v8::Handle<v8::Function> h) {
+ return MaybeLocal<v8::Object>(h->NewInstance());
+}
+
+inline
+MaybeLocal<v8::Object> NewInstance(
+ v8::Local<v8::Function> h
+ , int argc
+ , v8::Local<v8::Value> argv[]) {
+ return MaybeLocal<v8::Object>(h->NewInstance(argc, argv));
+}
+
+inline
+MaybeLocal<v8::Object> NewInstance(v8::Handle<v8::ObjectTemplate> h) {
+ return MaybeLocal<v8::Object>(h->NewInstance());
+}
+
+inline
+MaybeLocal<v8::Function> GetFunction(v8::Handle<v8::FunctionTemplate> t) {
+ return MaybeLocal<v8::Function>(t->GetFunction());
+}
+
+inline Maybe<bool> Set(
+ v8::Handle<v8::Object> obj
+ , v8::Handle<v8::Value> key
+ , v8::Handle<v8::Value> value) {
+ return Just<bool>(obj->Set(key, value));
+}
+
+inline Maybe<bool> Set(
+ v8::Handle<v8::Object> obj
+ , uint32_t index
+ , v8::Handle<v8::Value> value) {
+ return Just<bool>(obj->Set(index, value));
+}
+
+#include "nan_define_own_property_helper.h" // NOLINT(build/include)
+
+inline Maybe<bool> DefineOwnProperty(
+ v8::Handle<v8::Object> obj
+ , v8::Handle<v8::String> key
+ , v8::Handle<v8::Value> value
+ , v8::PropertyAttribute attribs = v8::None) {
+ v8::PropertyAttribute current = obj->GetPropertyAttributes(key);
+ return imp::DefineOwnPropertyHelper(current, obj, key, value, attribs);
+}
+
+NAN_DEPRECATED inline Maybe<bool> ForceSet(
+ v8::Handle<v8::Object> obj
+ , v8::Handle<v8::Value> key
+ , v8::Handle<v8::Value> value
+ , v8::PropertyAttribute attribs = v8::None) {
+ return Just<bool>(obj->ForceSet(key, value, attribs));
+}
+
+inline MaybeLocal<v8::Value> Get(
+ v8::Handle<v8::Object> obj
+ , v8::Handle<v8::Value> key) {
+ return MaybeLocal<v8::Value>(obj->Get(key));
+}
+
+inline MaybeLocal<v8::Value> Get(
+ v8::Handle<v8::Object> obj
+ , uint32_t index) {
+ return MaybeLocal<v8::Value>(obj->Get(index));
+}
+
+inline Maybe<v8::PropertyAttribute> GetPropertyAttributes(
+ v8::Handle<v8::Object> obj
+ , v8::Handle<v8::Value> key) {
+ return Just<v8::PropertyAttribute>(obj->GetPropertyAttributes(key));
+}
+
+inline Maybe<bool> Has(
+ v8::Handle<v8::Object> obj
+ , v8::Handle<v8::String> key) {
+ return Just<bool>(obj->Has(key));
+}
+
+inline Maybe<bool> Has(
+ v8::Handle<v8::Object> obj
+ , uint32_t index) {
+ return Just<bool>(obj->Has(index));
+}
+
+inline Maybe<bool> Delete(
+ v8::Handle<v8::Object> obj
+ , v8::Handle<v8::String> key) {
+ return Just<bool>(obj->Delete(key));
+}
+
+inline Maybe<bool> Delete(
+ v8::Handle<v8::Object> obj
+ , uint32_t index) {
+ return Just<bool>(obj->Delete(index));
+}
+
+inline
+MaybeLocal<v8::Array> GetPropertyNames(v8::Handle<v8::Object> obj) {
+ return MaybeLocal<v8::Array>(obj->GetPropertyNames());
+}
+
+inline
+MaybeLocal<v8::Array> GetOwnPropertyNames(v8::Handle<v8::Object> obj) {
+ return MaybeLocal<v8::Array>(obj->GetOwnPropertyNames());
+}
+
+inline Maybe<bool> SetPrototype(
+ v8::Handle<v8::Object> obj
+ , v8::Handle<v8::Value> prototype) {
+ return Just<bool>(obj->SetPrototype(prototype));
+}
+
+inline MaybeLocal<v8::String> ObjectProtoToString(
+ v8::Handle<v8::Object> obj) {
+ return MaybeLocal<v8::String>(obj->ObjectProtoToString());
+}
+
+inline Maybe<bool> HasOwnProperty(
+ v8::Handle<v8::Object> obj
+ , v8::Handle<v8::String> key) {
+ return Just<bool>(obj->HasOwnProperty(key));
+}
+
+inline Maybe<bool> HasRealNamedProperty(
+ v8::Handle<v8::Object> obj
+ , v8::Handle<v8::String> key) {
+ return Just<bool>(obj->HasRealNamedProperty(key));
+}
+
+inline Maybe<bool> HasRealIndexedProperty(
+ v8::Handle<v8::Object> obj
+ , uint32_t index) {
+ return Just<bool>(obj->HasRealIndexedProperty(index));
+}
+
+inline Maybe<bool> HasRealNamedCallbackProperty(
+ v8::Handle<v8::Object> obj
+ , v8::Handle<v8::String> key) {
+ return Just<bool>(obj->HasRealNamedCallbackProperty(key));
+}
+
+inline MaybeLocal<v8::Value> GetRealNamedPropertyInPrototypeChain(
+ v8::Handle<v8::Object> obj
+ , v8::Handle<v8::String> key) {
+ return MaybeLocal<v8::Value>(
+ obj->GetRealNamedPropertyInPrototypeChain(key));
+}
+
+inline MaybeLocal<v8::Value> GetRealNamedProperty(
+ v8::Handle<v8::Object> obj
+ , v8::Handle<v8::String> key) {
+ return MaybeLocal<v8::Value>(obj->GetRealNamedProperty(key));
+}
+
+inline MaybeLocal<v8::Value> CallAsFunction(
+ v8::Handle<v8::Object> obj
+ , v8::Handle<v8::Object> recv
+ , int argc
+ , v8::Handle<v8::Value> argv[]) {
+ return MaybeLocal<v8::Value>(obj->CallAsFunction(recv, argc, argv));
+}
+
+inline MaybeLocal<v8::Value> CallAsConstructor(
+ v8::Handle<v8::Object> obj
+ , int argc
+ , v8::Local<v8::Value> argv[]) {
+ return MaybeLocal<v8::Value>(obj->CallAsConstructor(argc, argv));
+}
+
+inline
+MaybeLocal<v8::String> GetSourceLine(v8::Handle<v8::Message> msg) {
+ return MaybeLocal<v8::String>(msg->GetSourceLine());
+}
+
+inline Maybe<int> GetLineNumber(v8::Handle<v8::Message> msg) {
+ return Just<int>(msg->GetLineNumber());
+}
+
+inline Maybe<int> GetStartColumn(v8::Handle<v8::Message> msg) {
+ return Just<int>(msg->GetStartColumn());
+}
+
+inline Maybe<int> GetEndColumn(v8::Handle<v8::Message> msg) {
+ return Just<int>(msg->GetEndColumn());
+}
+
+inline MaybeLocal<v8::Object> CloneElementAt(
+ v8::Handle<v8::Array> array
+ , uint32_t index) {
+ return MaybeLocal<v8::Object>(array->CloneElementAt(index));
+}
+
+inline MaybeLocal<v8::Value> Call(
+ v8::Local<v8::Function> fun
+ , v8::Local<v8::Object> recv
+ , int argc
+ , v8::Local<v8::Value> argv[]) {
+ return MaybeLocal<v8::Value>(fun->Call(recv, argc, argv));
+}
+
+#endif // NAN_MAYBE_PRE_43_INL_H_
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