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RFC3239: Implement compact cfg(target(..))

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Loïc BRANSTETT 2022-04-22 16:34:56 +02:00 • committed by Urgau
parent ae38533ed7
commit 8345571cd0
4 changed files with 24 additions and 0 deletions
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19
compiler/rustc_attr/src/builtin.rs
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@ -630,6 +630,25 @@ pub fn eval_condition(
!eval_condition(mis[0].meta_item().unwrap(), sess, features, eval)
}
sym::target => {
if let Some(features) = features && !features.cfg_target_compact {
feature_err(
sess,
sym::cfg_target_compact,
cfg.span,
&"compact `cfg(target(..))` is experimental and subject to change"
).emit();
}
mis.iter().fold(true, |res, mi| {
let mut mi = mi.meta_item().unwrap().clone();
if let [seg, ..] = &mut mi.path.segments[..] {
seg.ident.name = Symbol::intern(&format!("target_{}", seg.ident.name));
}
res & eval_condition(&mi, sess, features, eval)
})
}
_ => {
struct_span_err!(
sess.span_diagnostic,