From 5c056ed2f5d118cfd5d936b10a9c34d8813a6c09 Mon Sep 17 00:00:00 2001
From: Mara Bos <m-ou.se@m-ou.se>
Date: Mon, 7 Dec 2020 21:23:29 +0100
Subject: [PATCH] Rename Iterator::fold_first to reduce.

---
 compiler/rustc_hir/src/hir.rs            | 2 +-
 library/core/src/iter/traits/iterator.rs | 8 ++++----
 2 files changed, 5 insertions(+), 5 deletions(-)

diff --git a/compiler/rustc_hir/src/hir.rs b/compiler/rustc_hir/src/hir.rs
index 1c16dc02667..6487b23a6a6 100644
--- a/compiler/rustc_hir/src/hir.rs
+++ b/compiler/rustc_hir/src/hir.rs
@@ -358,7 +358,7 @@ impl GenericArgs<'_> {
             .iter()
             .filter(|arg| !arg.is_synthetic())
             .map(|arg| arg.span())
-            .fold_first(|span1, span2| span1.to(span2))
+            .reduce(|span1, span2| span1.to(span2))
     }
 
     /// Returns span encompassing arguments and their surrounding `<>` or `()`
diff --git a/library/core/src/iter/traits/iterator.rs b/library/core/src/iter/traits/iterator.rs
index c961e2964a9..7a3700d6923 100644
--- a/library/core/src/iter/traits/iterator.rs
+++ b/library/core/src/iter/traits/iterator.rs
@@ -2138,7 +2138,7 @@ pub trait Iterator {
     ///     where I: Iterator,
     ///           I::Item: Ord,
     /// {
-    ///     iter.fold_first(|a, b| {
+    ///     iter.reduce(|a, b| {
     ///         if a >= b { a } else { b }
     ///     })
     /// }
@@ -2150,7 +2150,7 @@ pub trait Iterator {
     /// ```
     #[inline]
     #[unstable(feature = "iterator_fold_self", issue = "68125")]
-    fn fold_first<F>(mut self, f: F) -> Option<Self::Item>
+    fn reduce<F>(mut self, f: F) -> Option<Self::Item>
     where
         Self: Sized,
         F: FnMut(Self::Item, Self::Item) -> Self::Item,
@@ -2647,7 +2647,7 @@ pub trait Iterator {
             move |x, y| cmp::max_by(x, y, &mut compare)
         }
 
-        self.fold_first(fold(compare))
+        self.reduce(fold(compare))
     }
 
     /// Returns the element that gives the minimum value from the
@@ -2707,7 +2707,7 @@ pub trait Iterator {
             move |x, y| cmp::min_by(x, y, &mut compare)
         }
 
-        self.fold_first(fold(compare))
+        self.reduce(fold(compare))
     }
 
     /// Reverses an iterator's direction.