sorted_map: add contains_key function

ljedrz · ljedrz · commit 5b6401f09db5 · 2018-12-10T14:11:14.000+01:00
diff --git a/src/librustc_data_structures/sorted_map.rs b/src/librustc_data_structures/sorted_map.rs
@@ -260,6 +260,14 @@ impl<K: Ord, V> SortedMap<K, V> {
 
         (start, end)
     }
+
+    #[inline]
+    pub fn contains_key<Q>(&self, key: &Q) -> bool
+        where K: Borrow<Q>,
+              Q: Ord + ?Sized
+    {
+        self.get(key).is_some()
+    }
 }
 
 impl<K: Ord, V> IntoIterator for SortedMap<K, V> {

Original file line number	Diff line number	Diff line change
`@@ -260,6 +260,14 @@ impl<K: Ord, V> SortedMap<K, V> {`
`260`	`260`
`261`	`261`	`(start, end)`
`262`	`262`	`}`
	`263`	`+`
	`264`	`+ #[inline]`
	`265`	`+ pub fn contains_key<Q>(&self, key: &Q) -> bool`
	`266`	`+ where K: Borrow<Q>,`
	`267`	`+ Q: Ord + ?Sized`
	`268`	`+ {`
	`269`	`+ self.get(key).is_some()`
	`270`	`+ }`
`263`	`271`	`}`
`264`	`272`
`265`	`273`	`impl<K: Ord, V> IntoIterator for SortedMap<K, V> {`