bendns' repos / rust-analyzer
Unnamed repository; edit this file 'description' to name the repository.
Diffstat (limited to 'crates/cfg/src/lib.rs')
-rw-r--r--crates/cfg/src/lib.rs21
1 files changed, 19 insertions, 2 deletions
diff --git a/crates/cfg/src/lib.rs b/crates/cfg/src/lib.rs
index 08545b6851..906106ca5d 100644
--- a/crates/cfg/src/lib.rs
+++ b/crates/cfg/src/lib.rs
@@ -9,7 +9,7 @@ use std::fmt;
use rustc_hash::FxHashSet;
-use intern::{sym, Symbol};
+use intern::{Symbol, sym};
pub use cfg_expr::{CfgAtom, CfgExpr};
pub use dnf::DnfExpr;
@@ -31,7 +31,7 @@ pub struct CfgOptions {
impl Default for CfgOptions {
fn default() -> Self {
- Self { enabled: FxHashSet::from_iter([CfgAtom::Flag(sym::true_.clone())]) }
+ Self { enabled: FxHashSet::from_iter([CfgAtom::Flag(sym::true_)]) }
}
}
@@ -104,6 +104,17 @@ impl CfgOptions {
_ => None,
})
}
+
+ pub fn to_hashable(&self) -> HashableCfgOptions {
+ let mut enabled = self.enabled.iter().cloned().collect::<Box<[_]>>();
+ enabled.sort_unstable();
+ HashableCfgOptions { _enabled: enabled }
+ }
+
+ #[inline]
+ pub fn shrink_to_fit(&mut self) {
+ self.enabled.shrink_to_fit();
+ }
}
impl Extend<CfgAtom> for CfgOptions {
@@ -256,3 +267,9 @@ impl fmt::Display for InactiveReason {
Ok(())
}
}
+
+/// A `CfgOptions` that implements `Hash`, for the sake of hashing only.
+#[derive(Debug, Clone, PartialEq, Eq, Hash)]
+pub struct HashableCfgOptions {
+ _enabled: Box<[CfgAtom]>,
+}