#[target]Expand description
Provides a less verbose equivalent to the cfg(target_arch) and target_feature attributes.
A function tagged with #[target("x86_64+avx+avx2")], for example, is equivalent to a
function tagged with each of:
#[cfg(target_arch = "x86_64")]#[target_feature(enable = "avx")]#[target_feature(enable = "avx2")]
The target attribute is intended to be used in tandem with the multiversion attribute
to produce hand-written multiversioned functions.