R1KO / Async

Simple async library example

Async

Usage

Async "Hello World". Just for fun %)

$fn = async(static function () {
    echo yield 1;

    return async(static function () {
        echo yield 2;
        echo yield 3;

        return 'Word';
    });
});

$prom = async(static function () use ($fn) {
    echo yield 4;

    return $fn;
})->then(static function ($value) {
    $promise = async(static function () use ($value) {
        echo yield 5;
        echo yield 6;

        return $value;
    });

    $promise->then(static function ($value) {
        echo "\nHell Or $value\n";
    });
});

All you need to know

1. Function async returns a Promise.
2. Result of a promise is an return value of given closure.
3. Every yield expression is an EventLoop "tick".
4. Every yield Promise or return Promise waits for completion, and then returns the result.

Examples

$promise = async(fn () => 23)
$promise->then(fn ($value) => echo $value)

// 23

---

$promise = async(function () {
    echo yield 1;
    echo yield 2;
    
    return 3;
});
$promise->then(fn ($value) => echo $value)

// 123

---

async(function () {
    echo yield 1;
    echo yield 3;
});

async(function () {
    echo yield 2;
    echo yield 4;
});

// 1234

---

async(function() {
    $promise = async(fn () => 23);
    
    echo yield $promise; // 23
});

---

$promise = async(function() {
    return async(fn () => 23);
});

$promise->then(fn ($value) => echo $value);
// 23

TL;DR; Do not us it =)

License

See LICENSE