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Add compile-time tests against unexpected target features cfgs

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Urgau 2024-11-07 00:28:43 +01:00 • committed by Amanieu d'Antras
parent f62e1daa2d
commit 7956142f92
1 changed files with 24 additions and 0 deletions
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24
library/stdarch/crates/std_detect/src/detect/macros.rs
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@ -14,6 +14,21 @@ macro_rules! detect_feature {
};
}
#[allow(unused_macros, reason = "it's used in the features! macro below")]
macro_rules! check_cfg_feature {
($feature:tt, $feature_lit:tt) => {
check_cfg_feature!($feature, $feature_lit : $feature_lit)
};
($feature:tt, $feature_lit:tt : $($target_feature_lit:tt),*) => {
$(cfg!(target_feature = $target_feature_lit);)*
};
($feature:tt, $feature_lit:tt, without cfg check: $feature_cfg_check:literal) => {
// FIXME: Enable once rust-lang/rust#132577 hit's nightly
// #[expect(unexpected_cfgs, reason = $feature_lit)]
// { cfg!(target_feature = $feature_lit) }
};
}
#[allow(unused)]
macro_rules! features {
(
@ -117,6 +132,15 @@ macro_rules! features {
};
}
#[test]
#[deny(unexpected_cfgs)]
#[deny(unfulfilled_lint_expectations)]
fn unexpected_cfgs() {
$(
check_cfg_feature!($feature, $feature_lit $(, without cfg check: $feature_cfg_check)? $(: $($target_feature_lit),*)?);
)*
}
/// Each variant denotes a position in a bitset for a particular feature.
///
/// PLEASE: do not use this, it is an implementation detail subject