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Description
Hi Community,
As I currently learn hacklang, It seems the sample code in this page https://docs.hhvm.com/hack/asynchronous-operations/some-basics is not runnable.
spec
hhvm --version
HipHop VM 4.18.0 (rel)
Compiler: 1565634828_N
Repo schema: 87cc9f3f8ece4c477c3bcf388b96a2a3031e653issue
I find that if the run the sample code of
<?hh // strict
namespace Hack\UserDocumentation\AsyncOps\Basics\Examples\AsyncCurl;
use namespace HH\Lib\Vec;
async function curl_A(): Awaitable<string> {
$x = await \HH\Asio\curl_exec("http://example.com/");
return $x;
}
async function curl_B(): Awaitable<string> {
$y = await \HH\Asio\curl_exec("http://example.net/");
return $y;
}
async function async_curl(): Awaitable<void> {
$start = \microtime(true);
list($a, $b) = await Vec\from_async(vec[curl_A(), curl_B()]);
$end = \microtime(true);
echo "Total time taken: " . \strval($end - $start) . " seconds\n";
}
<<__EntryPoint>>
function main():void {
\HH\Asio\join(async_curl());
}It will always throw following error
Fatal error: Uncaught Error: Call to undefined function HH\Lib\Vec\from_async() in /Users/alphawong/works/src/github.com/alphawong/hello-hhvm/bin/async_func.hack:20
Stack trace:
#0 /Users/alphawong/works/src/github.com/alphawong/hello-hhvm/bin/async_func.hack(27): Hack\UserDocumentation\AsyncOps\Basics\Examples\AsyncCurl\async_curl()
#1 (): Hack\UserDocumentation\AsyncOps\Basics\Examples\AsyncCurl\main()
#2 {main}When I Google it I find that I need to change require_once(__DIR__.'/../vendor/autoload.hack'); to require_once(__DIR__.'/../vendor/hh_autoload.hh); to make it runnable.
So I modify the currently sample code by split it to two file based on the hhvm version 4 like following added commit in order to let the tutorial working.
Please review my change.
#709
Best,
Alpha