Adding upstream version 124.0.1.upstream/124.0.1

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

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+# num-derive
+
+[![crate](https://img.shields.io/crates/v/num-derive.svg)](https://crates.io/crates/num-derive)
+[![documentation](https://docs.rs/num-derive/badge.svg)](https://docs.rs/num-derive)
+[![minimum rustc 1.56](https://img.shields.io/badge/rustc-1.56+-red.svg)](https://rust-lang.github.io/rfcs/2495-min-rust-version.html)
+[![build status](https://github.com/rust-num/num-derive/workflows/master/badge.svg)](https://github.com/rust-num/num-derive/actions)
+
+Procedural macros to derive numeric traits in Rust.
+
+## Usage
+
+Add this to your `Cargo.toml`:
+
+```toml
+[dependencies]
+num-traits = "0.2"
+num-derive = "0.4"
+```
+
+and this to your crate root:
+
+```rust
+#[macro_use]
+extern crate num_derive;
+```
+
+Then you can derive traits on your own types:
+
+```rust
+#[derive(FromPrimitive, ToPrimitive)]
+enum Color {
+    Red,
+    Blue,
+    Green,
+}
+```
+
+## Optional features
+
+- **`full-syntax`** — Enables `num-derive` to handle enum discriminants
+  represented by complex expressions. Usually can be avoided by
+  [utilizing constants], so only use this feature if namespace pollution is
+  undesired and [compile time doubling] is acceptable.
+
+[utilizing constants]: https://github.com/rust-num/num-derive/pull/3#issuecomment-359044704
+[compile time doubling]: https://github.com/rust-num/num-derive/pull/3#issuecomment-359172588
+
+## Releases
+
+Release notes are available in [RELEASES.md](RELEASES.md).
+
+## Compatibility
+
+The `num-derive` crate is tested for rustc 1.56 and greater.
+
+## License
+
+Licensed under either of
+
+ * [Apache License, Version 2.0](http://www.apache.org/licenses/LICENSE-2.0)
+ * [MIT license](http://opensource.org/licenses/MIT)
+
+at your option.
+
+### Contribution
+
+Unless you explicitly state otherwise, any contribution intentionally submitted
+for inclusion in the work by you, as defined in the Apache-2.0 license, shall be
+dual licensed as above, without any additional terms or conditions.