Polling async Function - No Method Named poll

[Phlopsi]

I posted a minimum working example for resolving futures here:

Sync/Async best practices

When async came out, I wanted to experiment with it a bit, trying to understand how it works (never worked with asynchronous code before). I was a bit surprised, when I found out, that Rust didn't include any way to "syncify" async code by resolving futures. I didn't want to use full-blown third-party crates for some simple experimentation, so I had to implement my own version. I looked at the available packages on crates.io, that dealt with this problem already and then went on to implement the…