Canonicalize special cases of map (2) specialize collect on MapSpecialCase

phimuemue · phimuemue · commit 0d6bb9db0890 · 2020-07-19T21:12:58.000+02:00
diff --git a/src/adaptors/mod.rs b/src/adaptors/mod.rs
@@ -863,6 +863,13 @@ impl<I, R> Iterator for MapSpecialCase<I, R>
         let mut f = self.f;
         self.iter.fold(init, move |acc, v| fold_f(acc, f.call(v)))
     }
+
+    fn collect<C>(self) -> C
+        where C: FromIterator<Self::Item>
+    {
+        let mut f = self.f;
+        self.iter.map(move |v| f.call(v)).collect()
+    }
 }
 
 impl<I, R> DoubleEndedIterator for MapSpecialCase<I, R>

Original file line number	Diff line number	Diff line change
`@@ -863,6 +863,13 @@ impl<I, R> Iterator for MapSpecialCase<I, R>`
`863`	`863`	`let mut f = self.f;`
`864`	`864`	`self.iter.fold(init, move \|acc, v\| fold_f(acc, f.call(v)))`
`865`	`865`	`}`
	`866`	`+`
	`867`	`+ fn collect<C>(self) -> C`
	`868`	`+ where C: FromIterator<Self::Item>`
	`869`	`+ {`
	`870`	`+ let mut f = self.f;`
	`871`	`+ self.iter.map(move \|v\| f.call(v)).collect()`
	`872`	`+ }`
`866`	`873`	`}`
`867`	`874`
`868`	`875`	`impl<I, R> DoubleEndedIterator for MapSpecialCase<I, R>`