Use .next() instead of .nth(0) on iterators.

3 files changed, 3 insertions, 3 deletions

diff --git a/src/librustc_parse/parser/expr.rs b/src/librustc_parse/parser/expr.rs
index 18ddd23588e..14366eb4e87 100644
--- a/src/librustc_parse/parser/expr.rs
+++ b/src/librustc_parse/parser/expr.rs
@@ -955,7 +955,7 @@ impl<'a> Parser<'a> {
         };
         let kind = if es.len() == 1 && !trailing_comma {
             // `(e)` is parenthesized `e`.
-            ExprKind::Paren(es.into_iter().nth(0).unwrap())
+            ExprKind::Paren(es.into_iter().next().unwrap())
         } else {
             // `(e,)` is a tuple with only one field, `e`.
             ExprKind::Tup(es)
diff --git a/src/librustc_parse/parser/pat.rs b/src/librustc_parse/parser/pat.rs
index 45d1aacdd3c..4c041fd669d 100644
--- a/src/librustc_parse/parser/pat.rs
+++ b/src/librustc_parse/parser/pat.rs
@@ -479,7 +479,7 @@ impl<'a> Parser<'a> {
         // Here, `(pat,)` is a tuple pattern.
         // For backward compatibility, `(..)` is a tuple pattern as well.
         Ok(if fields.len() == 1 && !(trailing_comma || fields[0].is_rest()) {
-            PatKind::Paren(fields.into_iter().nth(0).unwrap())
+            PatKind::Paren(fields.into_iter().next().unwrap())
         } else {
             PatKind::Tuple(fields)
         })
diff --git a/src/librustc_parse/parser/ty.rs b/src/librustc_parse/parser/ty.rs
index 3d2b0c014ac..c4469331b66 100644
--- a/src/librustc_parse/parser/ty.rs
+++ b/src/librustc_parse/parser/ty.rs
@@ -198,7 +198,7 @@ impl<'a> Parser<'a> {
         })?;
 
         if ts.len() == 1 && !trailing {
-            let ty = ts.into_iter().nth(0).unwrap().into_inner();
+            let ty = ts.into_iter().next().unwrap().into_inner();
             let maybe_bounds = allow_plus == AllowPlus::Yes && self.token.is_like_plus();
             match ty.kind {
                 // `(TY_BOUND_NOPAREN) + BOUND + ...`.