std.ArrayList.unusedCapacitySlice: Return unaligned slice (#20490)

1 files changed, 9 insertions, 2 deletions

diff --git a/lib/std/array_list.zig b/lib/std/array_list.zig
index 29902db34f..7b93668c5c 100644
--- a/lib/std/array_list.zig
+++ b/lib/std/array_list.zig
@@ -566,7 +566,7 @@ pub fn ArrayListAligned(comptime T: type, comptime alignment: ?u29) type {
         /// This can be useful for writing directly into an ArrayList.
         /// Note that such an operation must be followed up with a direct
         /// modification of `self.items.len`.
-        pub fn unusedCapacitySlice(self: Self) Slice {
+        pub fn unusedCapacitySlice(self: Self) []T {
             return self.allocatedSlice()[self.items.len..];
         }
 
@@ -1193,7 +1193,7 @@ pub fn ArrayListAlignedUnmanaged(comptime T: type, comptime alignment: ?u29) typ
         /// This can be useful for writing directly into an ArrayList.
         /// Note that such an operation must be followed up with a direct
         /// modification of `self.items.len`.
-        pub fn unusedCapacitySlice(self: Self) Slice {
+        pub fn unusedCapacitySlice(self: Self) []T {
             return self.allocatedSlice()[self.items.len..];
         }
 
@@ -2242,3 +2242,10 @@ test "return OutOfMemory when capacity would exceed maximum usize integer value"
         try testing.expectError(error.OutOfMemory, list.ensureUnusedCapacity(2));
     }
 }
+
+test "ArrayListAligned with non-native alignment compiles unusedCapabitySlice" {
+    var list = ArrayListAligned(u8, 4).init(testing.allocator);
+    defer list.deinit();
+    try list.appendNTimes(1, 4);
+    _ = list.unusedCapacitySlice();
+}