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

[macro_use]

extern crate cfg_if;

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

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

License

cfg-if is primarily distributed under the terms of both the MIT license and the Apache License (Version 2.0), with portions covered by various BSD-like licenses.

See LICENSE-APACHE, and LICENSE-MIT for details.