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Add comment about why the regular unused-attributes infrastructure

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is not used for #[rustc_dirty]/#[rustc_clean].
This commit is contained in:
Michael Woerister 2017-02-06 03:56:58 -05:00
parent 14191eed41
commit ab3c8269f4
1 changed files with 6 additions and 0 deletions
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6
src/librustc_incremental/persist/dirty_clean.rs
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@ -89,6 +89,9 @@ pub fn check_dirty_clean_annotations<'a, 'tcx>(tcx: TyCtxt<'a, 'tcx, 'tcx>,
};
intravisit::walk_crate(&mut all_attrs, krate);
// Note that we cannot use the existing "unused attribute"-infrastructure
// here, since that is running before trans. This is also the reason why
// all trans-specific attributes are `Whitelisted` in syntax::feature_gate.
all_attrs.report_unchecked_attrs(&dirty_clean_visitor.checked_attrs);
}
@ -237,6 +240,9 @@ pub fn check_dirty_clean_metadata<'a, 'tcx>(tcx: TyCtxt<'a, 'tcx, 'tcx>,
};
intravisit::walk_crate(&mut all_attrs, krate);
// Note that we cannot use the existing "unused attribute"-infrastructure
// here, since that is running before trans. This is also the reason why
// all trans-specific attributes are `Whitelisted` in syntax::feature_gate.
all_attrs.report_unchecked_attrs(&dirty_clean_visitor.checked_attrs);
});
}