Matt S Trout
and 1 contributors


PerlX::AsyncAwait - async/await keywords in pure perl


This is batshit crazy, even for mst. No warranty, express or implied.


First recommendation:

  use Future::AsyncAwait; # instead

because it's XS and does suspend/resume properly and will perform better.

This module, on the other hand, is an attempt to make it all work in pure perl, by rewriting your code into a .pmc file that contains extra code to handle suspend/resume at the pure perl level. Which is great if you want fatpacking or support for older perls, but not the best solution otherwise.

That said:

  use PerlX::Generator::Runtime;
  use PerlX::Generator::Compiler;
  my $f = async_do {
    await some_future_returning_function();
    return ...;
  my $result = $loop->await($f);

  my $sub = async_sub {
    await some_future_returning_function($_[0]);
    return ...;
  my $result = $loop->await($sub->(...));

This will result in a .pmc file that depends only on PerlX::AsyncAwait::Runtime. See the examples/ directory for what the results end up looking like. Note that the order is important, you *must* use the runtime *before* the compiler or weirdness will ensue.

Note that since the .pmc does not require the compiler, on the author side you will need to depend on Module::Compile directly.


There should be details here but I'm shipping this now so the YAPC::EU crowd can play with it.


We rewrite foreach into a 3-arg for so you *can* await inside a foreach loop.

We do not handle 'local' in any way shape or form that. I'll add that later.


 mst - Matt S. Trout (cpan:MSTROUT) <>


None yet - maybe this software is perfect! (ahahahahahahahahaha)


Copyright (c) 2017 the PerlX::AsyncAwait "AUTHOR" and "CONTRIBUTORS" as listed above.


This library is free software and may be distributed under the same terms as perl itself.