From 53ebfde6b433ebdb28d4989a345e8d34abf049b7 Mon Sep 17 00:00:00 2001
From: Meghan Denny <hello@nektro.net>
Date: Thu, 1 Jan 2026 20:34:55 -0800
Subject: [PATCH] std: use decl literals to improve endian ergonomics

---
 lib/std/builtin.zig | 3 +++
 lib/std/mem.zig     | 4 ++++
 2 files changed, 7 insertions(+)

diff --git a/lib/std/builtin.zig b/lib/std/builtin.zig
index 1ef77de9a5..12269131b3 100644
--- a/lib/std/builtin.zig
+++ b/lib/std/builtin.zig
@@ -841,6 +841,9 @@ pub const FloatMode = enum {
 pub const Endian = enum {
     big,
     little,
+
+    pub const native = builtin.target.cpu.arch.endian();
+    pub const foreign: Endian = @enumFromInt(1 - @intFromEnum(native));
 };
 
 /// This data structure is used by the Zig language code generation and
diff --git a/lib/std/mem.zig b/lib/std/mem.zig
index 6612c6d618..b2a71cfd6b 100644
--- a/lib/std/mem.zig
+++ b/lib/std/mem.zig
@@ -2006,11 +2006,13 @@ fn readPackedIntBig(comptime T: type, bytes: []const u8, bit_offset: usize) T {
     } else return @as(T, @bitCast(val));
 }
 
+/// Deprecated: use readPackedInt(T, bytes, bit_offset, value, .native)
 pub const readPackedIntNative = switch (native_endian) {
     .little => readPackedIntLittle,
     .big => readPackedIntBig,
 };
 
+/// Deprecated: use readPackedInt(T, bytes, bit_offset, value, .foreign)
 pub const readPackedIntForeign = switch (native_endian) {
     .little => readPackedIntBig,
     .big => readPackedIntLittle,
@@ -2159,11 +2161,13 @@ fn writePackedIntBig(comptime T: type, bytes: []u8, bit_offset: usize, value: T)
     writeInt(StoreInt, write_bytes[(byte_count - store_size)..][0..store_size], write_value, .big);
 }
 
+/// Deprecated: use writePackedInt(T, bytes, bit_offset, value, .native)
 pub const writePackedIntNative = switch (native_endian) {
     .little => writePackedIntLittle,
     .big => writePackedIntBig,
 };
 
+/// Deprecated: use writePackedInt(T, bytes, bit_offset, value, .foreign)
 pub const writePackedIntForeign = switch (native_endian) {
     .little => writePackedIntBig,
     .big => writePackedIntLittle,