From 3a3fd47a8ad5a026c318dfd68b511cfa8eed7564 Mon Sep 17 00:00:00 2001
From: Andrew Kelley <andrew@ziglang.org>
Date: Fri, 18 Jul 2025 10:42:04 -0700
Subject: [PATCH] std.debug: add assertAligned

---
 lib/std/debug.zig | 7 +++++++
 1 file changed, 7 insertions(+)

diff --git a/lib/std/debug.zig b/lib/std/debug.zig
index a7b88e4257..655852c65e 100644
--- a/lib/std/debug.zig
+++ b/lib/std/debug.zig
@@ -566,6 +566,13 @@ pub fn assertReadable(slice: []const volatile u8) void {
     for (slice) |*byte| _ = byte.*;
 }
 
+/// Invokes detectable illegal behavior when the provided array is not aligned
+/// to the provided amount.
+pub fn assertAligned(ptr: anytype, comptime alignment: std.mem.Alignment) void {
+    const aligned_ptr: *align(alignment.toByteUnits()) anyopaque = @alignCast(@ptrCast(ptr));
+    _ = aligned_ptr;
+}
+
 /// Equivalent to `@panic` but with a formatted message.
 pub fn panic(comptime format: []const u8, args: anytype) noreturn {
     @branchHint(.cold);