1.0.0

retry's API is now stable for the 1.0 series.

New features:

• Added a retry_with_index function that works like retry, but passes the number of the current try (as u64) as an argument to the supplied closure.

Improvements:

• retry::delay::{Exponential, Fibonacci} now implement From<std::time::Duration>.
• retry::delay::Range now implements From<std::ops::Range<std::time::Duration>> and From<std::ops::RangeInclusive<std::time::Duration>>.