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add Extensions::contains method

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This commit is contained in:
Nikolay Kim 2019-02-09 10:45:35 -08:00
parent 6a343fae06
commit a66d8589c2
1 changed files with 5 additions and 0 deletions
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5
src/extensions.rs
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@ -26,6 +26,11 @@ impl Extensions {
self.map.insert(TypeId::of::<T>(), Box::new(val));
}
/// Check if container contains entry
pub fn contains<T: 'static>(&self) -> bool {
self.map.get(&TypeId::of::<T>()).is_some()
}
/// Get a reference to a type previously inserted on this `Extensions`.
pub fn get<T: 'static>(&self) -> Option<&T> {
self.map