Macro gstuff::try_fus

source ·

macro_rules! try_fus {
    ($e: expr) => { ... };
}

Expand description

Lifts an error into a boxed future. Box<Future<Item=_, Error=String>>.

fn foo() -> Box<Future<Item=u32, Error=String>> {
  try_fus! (bar());
  let another_future = try_fus! (whatever());
  Box::new (another_future.then (move |something| Ok (123)))
}