gecko-dev/third_party/rust/boxfnonce/README.md

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This library provide a safe way to box FnOnce types.  It doesn't use any
unstable features and is therefore fully compatible with rust stable.

This library is provided because `Box<FnOnce()>` doesn't work yet, and
`Box<FnBox()>` will never be available in rust stable.

The documentation is located at [https://stbuehler.github.io/rustdocs/boxfnonce/boxfnonce/](https://stbuehler.github.io/rustdocs/boxfnonce/boxfnonce/).