Implement FromIterator<(AE, BE)> for `(impl Default+Extend<AE>, imp…

…l Default+Extend<BE>)`
rust-lang · Apr 3, 2024 · 03862a5 · 03862a5
1 parent 029cb1b
commit 03862a5
Showing 1 changed file with 14 additions and 0 deletions.
diff --git a/library/core/src/iter/traits/collect.rs b/library/core/src/iter/traits/collect.rs
@@ -150,6 +150,20 @@ pub trait FromIterator<A>: Sized {
     fn from_iter<T: IntoIterator<Item = A>>(iter: T) -> Self;
 }
 
+#[stable(feature = "from_iterator_for_tuple", since = "CURRENT_RUSTC_VERSION")]
+impl<A, B, AE, BE> FromIterator<(AE, BE)> for (A, B)
+where
+    A: Default + Extend<AE>,
+    B: Default + Extend<BE>,
+{
+    fn from_iter<I: IntoIterator<Item = (AE, BE)>>(iter: I) -> Self {
+        let mut res = <(A, B)>::default();
+        res.extend(iter);
+
+        res
+    }
+}
+
 /// Conversion into an [`Iterator`].
 ///
 /// By implementing `IntoIterator` for a type, you define how it will be