Tuple1Combinations::fold

Philippe-Cholet · Philippe-Cholet · commit ded12e8ea4e1 · 2023-10-06T14:46:00.000+02:00
diff --git a/src/adaptors/mod.rs b/src/adaptors/mod.rs
@@ -675,6 +675,13 @@ impl<I: Iterator> Iterator for Tuple1Combination<I> {
     fn count(self) -> usize {
         self.iter.count()
     }
+
+    fn fold<B, F>(self, init: B, f: F) -> B
+    where
+        F: FnMut(B, Self::Item) -> B,
+    {
+        self.iter.map(|x| (x,)).fold(init, f)
+    }
 }
 
 impl<I: Iterator> HasCombination<I> for (I::Item,) {

Original file line number	Diff line number	Diff line change
`@@ -675,6 +675,13 @@ impl<I: Iterator> Iterator for Tuple1Combination<I> {`
`675`	`675`	`fn count(self) -> usize {`
`676`	`676`	`self.iter.count()`
`677`	`677`	`}`
	`678`	`+`
	`679`	`+ fn fold<B, F>(self, init: B, f: F) -> B`
	`680`	`+ where`
	`681`	`+ F: FnMut(B, Self::Item) -> B,`
	`682`	`+ {`
	`683`	`+ self.iter.map(\|x\| (x,)).fold(init, f)`
	`684`	`+ }`
`678`	`685`	`}`
`679`	`686`
`680`	`687`	`impl<I: Iterator> HasCombination<I> for (I::Item,) {`