From 1e1f026c8355c8cd4c6efb5b7fc42e5b2091e1f2 Mon Sep 17 00:00:00 2001
From: Andrew Kelley <andrew@ziglang.org>
Date: Mon, 30 Jun 2025 15:36:12 -0700
Subject: [PATCH] std.mem.byteSwapAllFields: support slices

---
 lib/std/mem.zig | 6 ++++--
 1 file changed, 4 insertions(+), 2 deletions(-)

diff --git a/lib/std/mem.zig b/lib/std/mem.zig
index 59c26cc887..a5613536c6 100644
--- a/lib/std/mem.zig
+++ b/lib/std/mem.zig
@@ -1714,7 +1714,7 @@ pub fn readVarInt(comptime ReturnType: type, bytes: []const u8, endian: Endian)
             }
         },
     }
-    return @as(ReturnType, @truncate(result));
+    return @truncate(result);
 }
 
 test readVarInt {
@@ -2196,7 +2196,9 @@ pub fn byteSwapAllFields(comptime S: type, ptr: *S) void {
                 }
             }
         },
-        else => @compileError("byteSwapAllFields expects a struct or array as the first argument"),
+        else => {
+            ptr.* = @byteSwap(ptr.*);
+        },
     }
 }