Initial project import

tools/v/vlib/builtin/js/promise.js.v

@@ -0,0 +1,79 @@
+module builtin
+
+pub interface JS.Promise {
+	then(onFullfiled JS.Any, onRejected JS.Any)
+	catch(onCatch JS.Any) JS.Promise
+	finally(callback JS.Any) JS.Promise
+}
+
+@[use_new]
+pub fn JS.Promise.prototype.constructor(JS.Any) JS.Promise
+pub fn JS.Promise.reject(JS.Any) JS.Promise
+pub fn JS.Promise.resolve(JS.Any) JS.Promise
+pub fn JS.Promise.race(JS.Array) JS.Promise
+
+// Promise represents the eventual completion (or failure) of an asynchronous operation and its resulting value.
+pub struct Promise[T] {
+pub mut:
+	promise JS.Promise @[noinit]
+}
+
+pub fn promise_new[T](executor fn (resolve fn (T), reject fn (JS.Any))) Promise[T] {
+	promise := JS.Promise.prototype.constructor(executor)
+	return Promise[T]{promise}
+}
+
+pub fn (p Promise[T]) then(on_fulfilled fn (T), on_rejected fn (JS.Any)) {
+	p.promise.then(on_fulfilled, on_rejected)
+}
+
+// catch returns a Promise and deals with rejected cases only.
+pub fn (p Promise[T]) catch(callback fn (error JS.Any)) Promise[T] {
+	promise := p.promise.catch(callback)
+	return Promise[T]{promise}
+}
+
+pub fn (p Promise[T]) finally[U](callback fn ()) Promise[JS.Any] {
+	promise := p.promise.finally(callback)
+	return Promise[JS.Any]{promise}
+}
+
+// promise_reject returns promise which was rejected because of specified error.
+pub fn promise_reject(error JS.Any) Promise[JS.Any] {
+	promise := JS.Promise.reject(error)
+	return Promise[JS.Any]{promise}
+}
+
+// resolve returns promise which was resolved with specified value.
+pub fn promise_resolve[T](result T) Promise[T] {
+	promise := JS.Promise.resolve(result)
+	return Promise[T]{promise}
+}
+
+// promise_race returns a promise, that fulfills or rejects, as soon as one of the promises in an iterable fulfills or rejects.
+// It returns the value or reason from that first promise.
+pub fn promise_race[T](promises []Promise[T]) Promise[T] {
+	promises_ := JS.Array.prototype.constructor()
+
+	for elem in promises {
+		promises_.push(elem.promise)
+	}
+
+	promise := JS.Promise.race(promises_)
+	return Promise[T]{promise}
+}
+
+pub fn JS.Promise.all(JS.Array) JS.Promise
+pub fn JS.Promise.allSettled(JS.Array) JS.Promise
+
+/*
+pub type JsAny = JS.Any
+
+// all takes an iterable of promises as an input, and returns a single Promise that resolves to an array of the results of the input promises.
+pub fn all(array []JS.Promise) Promise<JS.Array, js.promise.JsAny> {
+	mut promise := JS.Promise(JS.Any(voidptr(0)))
+	#promise = Promise.all(array.arr.arr);
+
+	return Promise<JS.Array,JsAny>{promise}
+}
+*/