bjoernager/rust
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passes: check implied feature exists

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Add a check confirming that features referenced in `implied_by` meta
items actually exist.

Signed-off-by: David Wood <david.wood@huawei.com>
This commit is contained in:
David Wood 2022-07-20 14:52:23 +01:00
parent 6246d66c6d
commit e5872990d1
5 changed files with 60 additions and 30 deletions
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14
compiler/rustc_middle/src/middle/mod.rs
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@ -3,14 +3,14 @@ pub mod dependency_format;
pub mod exported_symbols;
pub mod lang_items;
pub mod lib_features {
use rustc_data_structures::fx::{FxHashMap, FxHashSet};
use rustc_span::symbol::Symbol;
use rustc_data_structures::fx::FxHashMap;
use rustc_span::{symbol::Symbol, Span};
#[derive(HashStable, Debug)]
pub struct LibFeatures {
// A map from feature to stabilisation version.
pub stable: FxHashMap<Symbol, Symbol>,
pub unstable: FxHashSet<Symbol>,
/// A map from feature to stabilisation version.
pub stable: FxHashMap<Symbol, (Symbol, Span)>,
pub unstable: FxHashMap<Symbol, Span>,
}
impl LibFeatures {
@ -18,8 +18,8 @@ pub mod lib_features {
let mut all_features: Vec<_> = self
.stable
.iter()
.map(|(f, s)| (*f, Some(*s)))
.chain(self.unstable.iter().map(|f| (*f, None)))
.map(|(f, (s, _))| (*f, Some(*s)))
.chain(self.unstable.iter().map(|(f, _)| (*f, None)))
.collect();
all_features.sort_unstable_by(|a, b| a.0.as_str().partial_cmp(b.0.as_str()).unwrap());
all_features