Tuple1Combinations::fold

Philippe-Cholet · Philippe-Cholet · commit b743e2a95f7e · 2023-10-24T15:48:32.000+02:00
diff --git a/src/adaptors/mod.rs b/src/adaptors/mod.rs
@@ -691,6 +691,13 @@ 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
`@@ -691,6 +691,13 @@ impl<I: Iterator> Iterator for Tuple1Combination<I> {`
`691`	`691`	`fn count(self) -> usize {`
`692`	`692`	`self.iter.count()`
`693`	`693`	`}`
	`694`	`+`
	`695`	`+ fn fold<B, F>(self, init: B, f: F) -> B`
	`696`	`+ where`
	`697`	`+ F: FnMut(B, Self::Item) -> B,`
	`698`	`+ {`
	`699`	`+ self.iter.map(\|x\| (x,)).fold(init, f)`
	`700`	`+ }`
`694`	`701`	`}`
`695`	`702`
`696`	`703`	`impl<I: Iterator> HasCombination<I> for (I::Item,) {`