dptree

Function inspect

Source 
pub fn inspect<'a, F, Output, Args, Descr>(f: F) -> Handler<'a, Output, Descr>
where
    Asyncify<F>: Injectable<(), Args> + Send + Sync + 'a,
    Output: 'a,
    Descr: HandlerDescription,
Expand description

Constructs a handler that inspects current state. Like map but does not add return value of f to the container.