Add Empty::size_hint

cuviper · cuviper · commit 51731824754b · 2021-04-06T12:15:48.000-07:00
diff --git a/src/sources.rs b/src/sources.rs
@@ -189,6 +189,11 @@ impl<T> StreamingIterator for Empty<T> {
     fn get(&self) -> Option<&Self::Item> {
         None
     }
+
+    #[inline]
+    fn size_hint(&self) -> (usize, Option<usize>) {
+        (0, Some(0))
+    }
 }
 
 impl<T> DoubleEndedStreamingIterator for Empty<T> {

Original file line number	Diff line number	Diff line change
`@@ -189,6 +189,11 @@ impl<T> StreamingIterator for Empty<T> {`
`189`	`189`	`fn get(&self) -> Option<&Self::Item> {`
`190`	`190`	`None`
`191`	`191`	`}`
	`192`	`+`
	`193`	`+ #[inline]`
	`194`	`+ fn size_hint(&self) -> (usize, Option<usize>) {`
	`195`	`+ (0, Some(0))`
	`196`	`+ }`
`192`	`197`	`}`
`193`	`198`
`194`	`199`	`impl<T> DoubleEndedStreamingIterator for Empty<T> {`