From de76815ebec2deead72f0ded8d24b0bb9586c2d8 Mon Sep 17 00:00:00 2001
From: Meghan Denny <hello@nektro.net>
Date: Sat, 27 Jun 2026 19:11:17 -0700
Subject: [PATCH] AllocatingWriter: add anyWritable

---
 allocating_writer.zig | 13 +++++++++++++
 1 file changed, 13 insertions(+)

diff --git a/allocating_writer.zig b/allocating_writer.zig
index 810011f25430e370132d5d4b9d5a0dfae61ecbc1..34b8241c331d69fad451f8e24eed0a65ca51a3d4 100644
--- a/allocating_writer.zig
+++ b/allocating_writer.zig
@@ -119,4 +119,17 @@ pub const AllocatingWriter = struct {
         for (iovec) |vec| self.appendAssumeCapacity(vec.base[0..vec.len]);
         return len;
     }
+
+    pub fn anyWritable(self: *AllocatingWriter) nio.AnyWritable {
+        const S = struct {
+            fn write(s: *allowzero anyopaque, buffer: []const u8) anyerror!usize {
+                const bw: *AllocatingWriter = @ptrCast(@alignCast(s));
+                return bw.write(buffer);
+            }
+        };
+        return .{
+            .vtable = &.{ .write = S.write },
+            .state = @ptrCast(self),
+        };
+    }
 };
-- 
2.54.0