Function from_fn

pub fn from_fn<'a, F, Fut, Output, Descr>(
    f: F,
    sig: HandlerSignature,
) -> Handler<'a, Output, Descr>
where
    F: Fn(DependencyMap, Cont<'a, Output>) -> Fut + Send + Sync + 'a,
    Fut: Future<Output = ControlFlow<Output, DependencyMap>> + Send + 'a,
    Descr: HandlerDescription,

Constructs a handler from a function.

sig is the run-time handler signature used for type inference and checking.

Most of the time, you do not want to use this function. Take a look at more specialised functions: crate::endpoint, crate::filter, crate::filter_map, etc.