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Diffstat (limited to 'crates/cfg/src/lib.rs')
| -rw-r--r-- | crates/cfg/src/lib.rs | 6 |
1 files changed, 5 insertions, 1 deletions
diff --git a/crates/cfg/src/lib.rs b/crates/cfg/src/lib.rs index 0aeb0b0505..f197dad2b2 100644 --- a/crates/cfg/src/lib.rs +++ b/crates/cfg/src/lib.rs @@ -7,7 +7,7 @@ mod dnf; #[cfg(test)] mod tests; -use std::fmt; +use std::{collections::HashSet, fmt}; use rustc_hash::FxHashSet; use tt::SmolStr; @@ -58,6 +58,10 @@ impl CfgOptions { self.enabled.insert(CfgAtom::KeyValue { key, value }); } + pub fn diff<'a>(&'a self, other: &'a CfgOptions) -> HashSet<&CfgAtom> { + self.enabled.difference(&other.enabled).collect() + } + pub fn apply_diff(&mut self, diff: CfgDiff) { for atom in diff.enable { self.enabled.insert(atom); |