feature: Implement vec_try_remove

Vec::try_remove is a non-panicking version of Vec::remove

2 files changed, 16 insertions, 0 deletions

diff --git a/library/alloctests/tests/lib.rs b/library/alloctests/tests/lib.rs
index 8c3ce156f3c..cba9883e148 100644
--- a/library/alloctests/tests/lib.rs
+++ b/library/alloctests/tests/lib.rs
@@ -41,6 +41,7 @@
 #![feature(unique_rc_arc)]
 #![feature(macro_metavar_expr_concat)]
 #![feature(vec_peek_mut)]
+#![feature(vec_try_remove)]
 #![allow(internal_features)]
 #![deny(fuzzy_provenance_casts)]
 #![deny(unsafe_op_in_unsafe_fn)]
diff --git a/library/alloctests/tests/vec.rs b/library/alloctests/tests/vec.rs
index 33a34daccbf..ea334ab0f14 100644
--- a/library/alloctests/tests/vec.rs
+++ b/library/alloctests/tests/vec.rs
@@ -631,6 +631,21 @@ fn test_swap_remove_empty() {
 }
 
 #[test]
+fn test_try_remove() {
+    let mut vec = vec![1, 2, 3];
+    // We are attempting to remove vec[0] which contains 1
+    assert_eq!(vec.try_remove(0), Some(1));
+    // Now `vec` looks like: [2, 3]
+    // We will now try to remove vec[2] which does not exist
+    // This should return `None`
+    assert_eq!(vec.try_remove(2), None);
+
+    // We will try the same thing with an empty vector
+    let mut v: Vec<u8> = vec![];
+    assert!(v.try_remove(0).is_none());
+}
+
+#[test]
 fn test_move_items() {
     let vec = vec![1, 2, 3];
     let mut vec2 = vec![];