diff options
Diffstat (limited to '')
-rw-r--r-- | src/tools/rustfmt/tests/source/cfg_if/lib.rs | 49 |
1 files changed, 49 insertions, 0 deletions
diff --git a/src/tools/rustfmt/tests/source/cfg_if/lib.rs b/src/tools/rustfmt/tests/source/cfg_if/lib.rs new file mode 100644 index 000000000..8b3bb304f --- /dev/null +++ b/src/tools/rustfmt/tests/source/cfg_if/lib.rs @@ -0,0 +1,49 @@ +//! Run-time feature detection for the Rust standard library. +//! +//! To detect whether a feature is enabled in the system running the binary +//! use one of the appropriate macro for the target: +//! +//! * `x86` and `x86_64`: [`is_x86_feature_detected`] +//! * `arm`: [`is_arm_feature_detected`] +//! * `aarch64`: [`is_aarch64_feature_detected`] +//! * `mips`: [`is_mips_feature_detected`] +//! * `mips64`: [`is_mips64_feature_detected`] +//! * `powerpc`: [`is_powerpc_feature_detected`] +//! * `powerpc64`: [`is_powerpc64_feature_detected`] + +#![unstable(feature = "stdsimd", issue = "27731")] +#![feature(const_fn, staged_api, stdsimd, doc_cfg, allow_internal_unstable)] +#![allow(clippy::shadow_reuse)] +#![deny(clippy::missing_inline_in_public_items)] +#![cfg_attr(target_os = "linux", feature(linkage))] +#![cfg_attr(all(target_os = "freebsd", target_arch = "aarch64"), feature(asm))] +#![cfg_attr(stdsimd_strict, deny(warnings))] +#![cfg_attr(test, allow(unused_imports))] +#![no_std] + +#[macro_use] +extern crate cfg_if; + +cfg_if! { + if #[cfg(feature = "std_detect_file_io")] { + #[cfg_attr(test, macro_use(println))] + extern crate std; + + #[allow(unused_imports)] + use std::{arch, fs, io, mem, sync}; + } else { + #[cfg(test)] + #[macro_use(println)] + extern crate std; + + #[allow(unused_imports)] + use core::{arch, mem, sync}; + } +} + +#[cfg(feature = "std_detect_dlsym_getauxval")] +extern crate libc; + +#[doc(hidden)] +#[unstable(feature = "stdsimd", issue = "27731")] +pub mod detect; |