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Native Abstractions for Node.js: C++ header for Node 0.8 -> 18 compatibility
There is a newer version: 2.19.0
/*********************************************************************
 * NAN - Native Abstractions for Node.js
 *
 * Copyright (c) 2018 NAN contributors
 *
 * MIT License 
 ********************************************************************/

#ifndef NAN_MAYBE_43_INL_H_
#define NAN_MAYBE_43_INL_H_

template
using MaybeLocal = v8::MaybeLocal;

inline
MaybeLocal ToDetailString(v8::Local val) {
  v8::Isolate *isolate = v8::Isolate::GetCurrent();
  v8::EscapableHandleScope scope(isolate);
  return scope.Escape(val->ToDetailString(isolate->GetCurrentContext())
                          .FromMaybe(v8::Local()));
}

inline
MaybeLocal ToArrayIndex(v8::Local val) {
  v8::Isolate *isolate = v8::Isolate::GetCurrent();
  v8::EscapableHandleScope scope(isolate);
  return scope.Escape(val->ToArrayIndex(isolate->GetCurrentContext())
                          .FromMaybe(v8::Local()));
}

inline
Maybe Equals(v8::Local a, v8::Local(b)) {
  v8::Isolate *isolate = v8::Isolate::GetCurrent();
  v8::HandleScope scope(isolate);
  return a->Equals(isolate->GetCurrentContext(), b);
}

inline
MaybeLocal NewInstance(v8::Local h) {
  v8::Isolate *isolate = v8::Isolate::GetCurrent();
  v8::EscapableHandleScope scope(isolate);
  return scope.Escape(h->NewInstance(isolate->GetCurrentContext())
                          .FromMaybe(v8::Local()));
}

inline
MaybeLocal NewInstance(
      v8::Local h
    , int argc
    , v8::Local argv[]) {
  v8::Isolate *isolate = v8::Isolate::GetCurrent();
  v8::EscapableHandleScope scope(isolate);
  return scope.Escape(h->NewInstance(isolate->GetCurrentContext(), argc, argv)
                          .FromMaybe(v8::Local()));
}

inline
MaybeLocal NewInstance(v8::Local h) {
  v8::Isolate *isolate = v8::Isolate::GetCurrent();
  v8::EscapableHandleScope scope(isolate);
  return scope.Escape(h->NewInstance(isolate->GetCurrentContext())
                          .FromMaybe(v8::Local()));
}


inline MaybeLocal GetFunction(
    v8::Local t) {
  v8::Isolate *isolate = v8::Isolate::GetCurrent();
  v8::EscapableHandleScope scope(isolate);
  return scope.Escape(t->GetFunction(isolate->GetCurrentContext())
                          .FromMaybe(v8::Local()));
}

inline Maybe Set(
    v8::Local obj
  , v8::Local key
  , v8::Local value) {
  v8::Isolate *isolate = v8::Isolate::GetCurrent();
  v8::HandleScope scope(isolate);
  return obj->Set(isolate->GetCurrentContext(), key, value);
}

inline Maybe Set(
    v8::Local obj
  , uint32_t index
  , v8::Local value) {
  v8::Isolate *isolate = v8::Isolate::GetCurrent();
  v8::HandleScope scope(isolate);
  return obj->Set(isolate->GetCurrentContext(), index, value);
}

#if NODE_MODULE_VERSION < NODE_4_0_MODULE_VERSION
#include "nan_define_own_property_helper.h"  // NOLINT(build/include)
#endif

inline Maybe DefineOwnProperty(
    v8::Local obj
  , v8::Local key
  , v8::Local value
  , v8::PropertyAttribute attribs = v8::None) {
  v8::Isolate *isolate = v8::Isolate::GetCurrent();
  v8::HandleScope scope(isolate);
#if NODE_MODULE_VERSION >= NODE_4_0_MODULE_VERSION
  return obj->DefineOwnProperty(isolate->GetCurrentContext(), key, value,
                                attribs);
#else
  Maybe maybeCurrent =
      obj->GetPropertyAttributes(isolate->GetCurrentContext(), key);
  if (maybeCurrent.IsNothing()) {
    return Nothing();
  }
  v8::PropertyAttribute current = maybeCurrent.FromJust();
  return imp::DefineOwnPropertyHelper(current, obj, key, value, attribs);
#endif
}

NAN_DEPRECATED inline Maybe ForceSet(
    v8::Local obj
  , v8::Local key
  , v8::Local value
  , v8::PropertyAttribute attribs = v8::None) {
  v8::Isolate *isolate = v8::Isolate::GetCurrent();
  v8::HandleScope scope(isolate);
#if NODE_MODULE_VERSION >= NODE_9_0_MODULE_VERSION
  return key->IsName()
             ? obj->DefineOwnProperty(isolate->GetCurrentContext(),
                                      key.As(), value, attribs)
             : Nothing();
#else
  return obj->ForceSet(isolate->GetCurrentContext(), key, value, attribs);
#endif
}

inline MaybeLocal Get(
    v8::Local obj
  , v8::Local key) {
  v8::Isolate *isolate = v8::Isolate::GetCurrent();
  v8::EscapableHandleScope scope(isolate);
  return scope.Escape(obj->Get(isolate->GetCurrentContext(), key)
                          .FromMaybe(v8::Local()));
}

inline
MaybeLocal Get(v8::Local obj, uint32_t index) {
  v8::Isolate *isolate = v8::Isolate::GetCurrent();
  v8::EscapableHandleScope scope(isolate);
  return scope.Escape(obj->Get(isolate->GetCurrentContext(), index)
                          .FromMaybe(v8::Local()));
}

inline v8::PropertyAttribute GetPropertyAttributes(
    v8::Local obj
  , v8::Local key) {
  v8::Isolate *isolate = v8::Isolate::GetCurrent();
  v8::HandleScope scope(isolate);
  return obj->GetPropertyAttributes(isolate->GetCurrentContext(), key)
      .FromJust();
}

inline Maybe Has(
    v8::Local obj
  , v8::Local key) {
  v8::Isolate *isolate = v8::Isolate::GetCurrent();
  v8::HandleScope scope(isolate);
  return obj->Has(isolate->GetCurrentContext(), key);
}

inline Maybe Has(v8::Local obj, uint32_t index) {
  v8::Isolate *isolate = v8::Isolate::GetCurrent();
  v8::HandleScope scope(isolate);
  return obj->Has(isolate->GetCurrentContext(), index);
}

inline Maybe Delete(
    v8::Local obj
  , v8::Local key) {
  v8::Isolate *isolate = v8::Isolate::GetCurrent();
  v8::HandleScope scope(isolate);
  return obj->Delete(isolate->GetCurrentContext(), key);
}

inline
Maybe Delete(v8::Local obj, uint32_t index) {
  v8::Isolate *isolate = v8::Isolate::GetCurrent();
  v8::HandleScope scope(isolate);
  return obj->Delete(isolate->GetCurrentContext(), index);
}

inline
MaybeLocal GetPropertyNames(v8::Local obj) {
  v8::Isolate *isolate = v8::Isolate::GetCurrent();
  v8::EscapableHandleScope scope(isolate);
  return scope.Escape(obj->GetPropertyNames(isolate->GetCurrentContext())
                          .FromMaybe(v8::Local()));
}

inline
MaybeLocal GetOwnPropertyNames(v8::Local obj) {
  v8::Isolate *isolate = v8::Isolate::GetCurrent();
  v8::EscapableHandleScope scope(isolate);
  return scope.Escape(obj->GetOwnPropertyNames(isolate->GetCurrentContext())
                          .FromMaybe(v8::Local()));
}

inline Maybe SetPrototype(
    v8::Local obj
  , v8::Local prototype) {
  v8::Isolate *isolate = v8::Isolate::GetCurrent();
  v8::HandleScope scope(isolate);
  return obj->SetPrototype(isolate->GetCurrentContext(), prototype);
}

inline MaybeLocal ObjectProtoToString(
    v8::Local obj) {
  v8::Isolate *isolate = v8::Isolate::GetCurrent();
  v8::EscapableHandleScope scope(isolate);
  return scope.Escape(obj->ObjectProtoToString(isolate->GetCurrentContext())
                          .FromMaybe(v8::Local()));
}

inline Maybe HasOwnProperty(
    v8::Local obj
  , v8::Local key) {
  v8::Isolate *isolate = v8::Isolate::GetCurrent();
  v8::HandleScope scope(isolate);
  return obj->HasOwnProperty(isolate->GetCurrentContext(), key);
}

inline Maybe HasRealNamedProperty(
    v8::Local obj
  , v8::Local key) {
  v8::Isolate *isolate = v8::Isolate::GetCurrent();
  v8::HandleScope scope(isolate);
  return obj->HasRealNamedProperty(isolate->GetCurrentContext(), key);
}

inline Maybe HasRealIndexedProperty(
    v8::Local obj
  , uint32_t index) {
  v8::Isolate *isolate = v8::Isolate::GetCurrent();
  v8::HandleScope scope(isolate);
  return obj->HasRealIndexedProperty(isolate->GetCurrentContext(), index);
}

inline Maybe HasRealNamedCallbackProperty(
    v8::Local obj
  , v8::Local key) {
  v8::Isolate *isolate = v8::Isolate::GetCurrent();
  v8::HandleScope scope(isolate);
  return obj->HasRealNamedCallbackProperty(isolate->GetCurrentContext(), key);
}

inline MaybeLocal GetRealNamedPropertyInPrototypeChain(
    v8::Local obj
  , v8::Local key) {
  v8::Isolate *isolate = v8::Isolate::GetCurrent();
  v8::EscapableHandleScope scope(isolate);
  return scope.Escape(obj->GetRealNamedPropertyInPrototypeChain(
                             isolate->GetCurrentContext(), key)
                          .FromMaybe(v8::Local()));
}

inline MaybeLocal GetRealNamedProperty(
    v8::Local obj
  , v8::Local key) {
  v8::Isolate *isolate = v8::Isolate::GetCurrent();
  v8::EscapableHandleScope scope(isolate);
  return scope.Escape(
      obj->GetRealNamedProperty(isolate->GetCurrentContext(), key)
          .FromMaybe(v8::Local()));
}

inline MaybeLocal CallAsFunction(
    v8::Local obj
  , v8::Local recv
  , int argc
  , v8::Local argv[]) {
  v8::Isolate *isolate = v8::Isolate::GetCurrent();
  v8::EscapableHandleScope scope(isolate);
  return scope.Escape(
      obj->CallAsFunction(isolate->GetCurrentContext(), recv, argc, argv)
          .FromMaybe(v8::Local()));
}

inline MaybeLocal CallAsConstructor(
    v8::Local obj
  , int argc, v8::Local argv[]) {
  v8::Isolate *isolate = v8::Isolate::GetCurrent();
  v8::EscapableHandleScope scope(isolate);
  return scope.Escape(
      obj->CallAsConstructor(isolate->GetCurrentContext(), argc, argv)
          .FromMaybe(v8::Local()));
}

inline
MaybeLocal GetSourceLine(v8::Local msg) {
  v8::Isolate *isolate = v8::Isolate::GetCurrent();
  v8::EscapableHandleScope scope(isolate);
  return scope.Escape(msg->GetSourceLine(isolate->GetCurrentContext())
                          .FromMaybe(v8::Local()));
}

inline Maybe GetLineNumber(v8::Local msg) {
  v8::Isolate *isolate = v8::Isolate::GetCurrent();
  v8::HandleScope scope(isolate);
  return msg->GetLineNumber(isolate->GetCurrentContext());
}

inline Maybe GetStartColumn(v8::Local msg) {
  v8::Isolate *isolate = v8::Isolate::GetCurrent();
  v8::HandleScope scope(isolate);
  return msg->GetStartColumn(isolate->GetCurrentContext());
}

inline Maybe GetEndColumn(v8::Local msg) {
  v8::Isolate *isolate = v8::Isolate::GetCurrent();
  v8::HandleScope scope(isolate);
  return msg->GetEndColumn(isolate->GetCurrentContext());
}

inline MaybeLocal CloneElementAt(
    v8::Local array
  , uint32_t index) {
#if (NODE_MODULE_VERSION >= NODE_6_0_MODULE_VERSION)
  v8::Isolate *isolate = v8::Isolate::GetCurrent();
  v8::EscapableHandleScope scope(isolate);
  v8::Local context = isolate->GetCurrentContext();
  v8::Local elem;
  v8::Local obj;
  if (!array->Get(context, index).ToLocal(&elem)) {
    return scope.Escape(obj);
  }
  if (!elem->ToObject(context).ToLocal(&obj)) {
    return scope.Escape(v8::Local());
  }
  return scope.Escape(obj->Clone());
#else
  v8::Isolate *isolate = v8::Isolate::GetCurrent();
  v8::EscapableHandleScope scope(isolate);
  return scope.Escape(array->CloneElementAt(isolate->GetCurrentContext(), index)
                          .FromMaybe(v8::Local()));
#endif
}

inline MaybeLocal Call(
    v8::Local fun
  , v8::Local recv
  , int argc
  , v8::Local argv[]) {
  v8::Isolate *isolate = v8::Isolate::GetCurrent();
  v8::EscapableHandleScope scope(isolate);
  return scope.Escape(fun->Call(isolate->GetCurrentContext(), recv, argc, argv)
                          .FromMaybe(v8::Local()));
}

#endif  // NAN_MAYBE_43_INL_H_