Programmiererforum

Code: Select all

'use strict';
v8log ("******** C++ Promise start ********");
const promiseFromCpp = new GetCppPromise();
v8log ("promise created");
promiseFromCpp.then(value => {
v8log ("C++::GetCppPromise()::Resolve->v8::then ", value);
}).catch(error => {
v8log (error);
});
v8log ("******* C++ Promise end   ********");
< /code>
Es gibt eine Konstruktorfunktion, die < /p>
 bereitgestellt wird.class cpp2v8
{
public:
static v8::Local resolver;
static void getNewPromise(const v8::FunctionCallbackInfo& args) {
v8::Isolate* isolate = args.GetIsolate();
v8::HandleScope handle_scope(isolate);
v8::Local context = isolate->GetCurrentContext();

resolver = v8::Promise::Resolver::New(context).ToLocalChecked();
v8::Local promise = resolver->GetPromise();

args.GetReturnValue().Set(promise);
}
};
v8::Local cpp2v8::resolver;

Code: Select all

    {
v8::Isolate::Scope isolate_scope(isolate);
v8::HandleScope handle_scope(isolate);

v8::Local global = v8::ObjectTemplate::New(isolate);
v8api::registerLogToConsole(isolate, global);
//provide constructor function here
global->Set(v8::String::NewFromUtf8(isolate, "GetCppPromise").ToLocalChecked(), v8::FunctionTemplate::New(isolate, cpp2v8::getNewPromise));

v8::Local context = v8::Context::New(isolate, nullptr, global);
v8::Context::Scope context_scope(context);

context->Global();

// JavaScript code to create and use a Person object
const char* source = R"(
'use strict';
v8log ("******** C++ Promise start ********");
const promiseFromCpp = new GetCppPromise();
v8log ("promise created");
promiseFromCpp.then(value => {
v8log ("C++::GetCppPromise()::Resolve->v8::then ", value);
}).catch(error => {
v8log (error);
});
v8log ("******* C++ Promise end   ********");

)";

v8::Local source_str = v8::String::NewFromUtf8(isolate, source).ToLocalChecked();

v8::Local script = v8::Script::Compile(context, source_str).ToLocalChecked();
script->Run(context).ToLocalChecked();
cpp2v8::resolver->Resolve(context, v8::String::NewFromUtf8(isolate, "Promise resolved outside!").ToLocalChecked()).FromJust();
< /code>
Im obigen Code wird < /code> nie aufgerufen.class cpp2v8
{
public:
static void getNewPromise(const v8::FunctionCallbackInfo& args) {
v8::Isolate* isolate = args.GetIsolate();
v8::HandleScope handle_scope(isolate);
v8::Local context = isolate->GetCurrentContext();

v8::Local resolver = v8::Promise::Resolver::New(context).ToLocalChecked();
v8::Local promise = resolver->GetPromise();
//Resolve here, in constructor
resolver->Resolve(context, v8::String::NewFromUtf8(isolate, "Promise resolved in C++!").ToLocalChecked()).FromJust();

args.GetReturnValue().Set(promise);
}