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Diffstat (limited to 'compiler/rustc_index/src/vec.rs')
| -rw-r--r-- | compiler/rustc_index/src/vec.rs | 5 |
1 files changed, 5 insertions, 0 deletions
diff --git a/compiler/rustc_index/src/vec.rs b/compiler/rustc_index/src/vec.rs index 88298150a79..b866c8b8433 100644 --- a/compiler/rustc_index/src/vec.rs +++ b/compiler/rustc_index/src/vec.rs @@ -208,6 +208,11 @@ impl<I: Idx, T> IndexVec<I, Option<T>> { pub fn remove(&mut self, index: I) -> Option<T> { self.get_mut(index)?.take() } + + #[inline] + pub fn contains(&self, index: I) -> bool { + self.get(index).and_then(Option::as_ref).is_some() + } } impl<I: Idx, T: fmt::Debug> fmt::Debug for IndexVec<I, T> { |