cfg-if

Documentation

A macro to ergonomically define an item depending on a large number of #[cfg] parameters. Structured like an if-else chain, the first matching branch is the item that gets emitted.

toml [dependencies] cfg-if = "0.1"

Example

```rust cfgif::cfgif! { if #[cfg(unix)] { fn foo() { /* unix specific functionality / } } else if #[cfg(target_pointer_width = "32")] { fn foo() { / non-unix, 32-bit functionality / } } else { fn foo() { / fallback implementation */ } } }

fn main() { foo(); } ```

License

This project is licensed under either of

• Apache License, Version 2.0, (LICENSE-APACHE or http://www.apache.org/licenses/LICENSE-2.0)
• MIT license (LICENSE-MIT or http://opensource.org/licenses/MIT)

at your option.

Contribution

Unless you explicitly state otherwise, any contribution intentionally submitted for inclusion in cfg-if by you, as defined in the Apache-2.0 license, shall be dual licensed as above, without any additional terms or conditions.