iterate List by value

[rust.git] / tests / ui / while_let_on_iterator.fixed

diff --git a/tests/ui/while_let_on_iterator.fixed b/tests/ui/while_let_on_iterator.fixed
index f5fcabf63fd392e6a5abee3fb5df203b86f2f312..e99c98ac79f2a7f4fa97bee33bb41ebb7fba7ef9 100644 (file)
--- a/tests/ui/while_let_on_iterator.fixed
+++ b/tests/ui/while_let_on_iterator.fixed
@@ -2,6 +2,7 @@
 
 #![warn(clippy::while_let_on_iterator)]
 #![allow(clippy::never_loop, unreachable_code, unused_mut)]
+#![feature(or_patterns)]
 
 fn base() {
     let mut iter = 1..20;
@@ -77,6 +78,62 @@ fn refutable() {
     // */
 }
 
+fn refutable2() {
+    // Issue 3780
+    {
+        let v = vec![1, 2, 3];
+        let mut it = v.windows(2);
+        while let Some([x, y]) = it.next() {
+            println!("x: {}", x);
+            println!("y: {}", y);
+        }
+
+        let mut it = v.windows(2);
+        while let Some([x, ..]) = it.next() {
+            println!("x: {}", x);
+        }
+
+        let mut it = v.windows(2);
+        while let Some([.., y]) = it.next() {
+            println!("y: {}", y);
+        }
+
+        let mut it = v.windows(2);
+        for [..] in it {}
+
+        let v = vec![[1], [2], [3]];
+        let mut it = v.iter();
+        while let Some([1]) = it.next() {}
+
+        let mut it = v.iter();
+        for [_x] in it {}
+    }
+
+    // binding
+    {
+        let v = vec![1, 2, 3];
+        let mut it = v.iter();
+        while let Some(x @ 1) = it.next() {
+            println!("{}", x);
+        }
+
+        let v = vec![[1], [2], [3]];
+        let mut it = v.iter();
+        for x @ [_] in it {
+            println!("{:?}", x);
+        }
+    }
+
+    // false negative
+    {
+        let v = vec![1, 2, 3];
+        let mut it = v.iter().map(Some);
+        while let Some(Some(_) | None) = it.next() {
+            println!("1");
+        }
+    }
+}
+
 fn nested_loops() {
     let a = [42, 1337];
     let mut y = a.iter();
@@ -152,6 +209,7 @@ fn issue1654() {
 fn main() {
     base();
     refutable();
+    refutable2();
     nested_loops();
     issue1121();
     issue2965();