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nan_maybe_pre_43_inl.h
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nan_maybe_pre_43_inl.h
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/*********************************************************************
* 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_;
};
template<typename T>
class Maybe {
public:
inline bool IsNothing() const { return !has_value_; }
inline bool IsJust() const { return has_value_; }
inline T FromJust() const {
#if defined(V8_ENABLE_CHECKS)
assert(IsJust() && "FromJust is Nothing");
#endif // V8_ENABLE_CHECKS
return value_;
}
inline T FromMaybe(const T& default_value) const {
return has_value_ ? value_ : default_value;
}
inline bool operator==(const Maybe &other) const {
return (IsJust() == other.IsJust()) &&
(!IsJust() || FromJust() == other.FromJust());
}
inline bool operator!=(const Maybe &other) const {
return !operator==(other);
}
private:
Maybe() : has_value_(false) {}
explicit Maybe(const T& t) : has_value_(true), value_(t) {}
bool has_value_;
T value_;
template<typename U>
friend Maybe<U> Nothing();
template<typename U>
friend Maybe<U> Just(const U& u);
};
template<typename T>
inline Maybe<T> Nothing() {
return Maybe<T>();
}
template<typename T>
inline Maybe<T> Just(const T& t) {
return Maybe<T>(t);
}
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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