For optional features of the crate, see our list of feature flags.
If you are targeting an older release of Rust, you will be interested in the compatibility section.
For upgrading from a previous version, review the upgrading guide.
Attributes understood by the
Rust version compatibility
Optional extensions to the crate
Using generic types
How to create opaque error types for public APIs
SNAFU's design philosophy
Details about the output of the
Upgrading from previous releases