cfg-if

library1.0.4rscratesunverified

A macro to ergonomically define an item depending on a large number of #[cfg] parameters, structured like an if-else chain.

utility

# Cargo.toml
[dependencies]
cfg-if = "1.0.4"

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SIG · CFG-IF

cfg-if

utilityrustv1.0.4

harness data pending

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Code

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Verified import paths — ran on the pinned version, not inferred.

cfg_if

✓ use cfg_if::cfg_if;

Shows how to use cfg_if! to conditionally compile code based on platform.

use cfg_if::cfg_if; cfg_if! { if #[cfg(unix)] { fn platform() -> &'static str { "unix" } } else if #[cfg(windows)] { fn platform() -> &'static str { "windows" } } else { fn platform() -> &'static str { "unknown" } } } fn main() { println!("{}", platform()); }

Debug

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Version history

1.0.4latest on crates.io

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Resources

githubhttps://github.com/rust-lang/cfg-if ↗

homepagehttps://github.com/rust-lang/cfg-if ↗

docshttps://docs.rs/cfg-if/ ↗