История

Kartikaya Gupta e1dbbcbce0 Bug 1436058 - Update Cargo lockfiles and re-vendor rust dependencies. r=jrmuizel MozReview-Commit-ID: GiRingn0bX1 --HG-- extra : rebase_source : 55e472428534e366a49ccc887f67b8c7836171b1		2018-02-12 11:32:10 -05:00
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src	Bug 1436058 - Update Cargo lockfiles and re-vendor rust dependencies. r=jrmuizel	2018-02-12 11:32:10 -05:00
tests	Bug 1436058 - Update Cargo lockfiles and re-vendor rust dependencies. r=jrmuizel	2018-02-12 11:32:10 -05:00
.cargo-checksum.json	Bug 1436058 - Update Cargo lockfiles and re-vendor rust dependencies. r=jrmuizel	2018-02-12 11:32:10 -05:00
.travis.yml	Bug 1436058 - Update Cargo lockfiles and re-vendor rust dependencies. r=jrmuizel	2018-02-12 11:32:10 -05:00
Cargo.toml	Bug 1436058 - Update Cargo lockfiles and re-vendor rust dependencies. r=jrmuizel	2018-02-12 11:32:10 -05:00
LICENSE-APACHE	Bug 1436058 - Update Cargo lockfiles and re-vendor rust dependencies. r=jrmuizel	2018-02-12 11:32:10 -05:00
LICENSE-MIT	Bug 1436058 - Update Cargo lockfiles and re-vendor rust dependencies. r=jrmuizel	2018-02-12 11:32:10 -05:00
README.md	Bug 1436058 - Update Cargo lockfiles and re-vendor rust dependencies. r=jrmuizel	2018-02-12 11:32:10 -05:00

README.md

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.

[dependencies]
cfg-if = "0.1"

Example

#[macro_use]
extern crate cfg_if;

cfg_if! {
    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

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.