From: Alejandro Colomar <alx@kernel.org>
Date: Wed, 15 May 2024 11:19:43 +0000 (+0200)
Subject: lib/cast.h: const_cast(): Reimplement with _Generic(3)
X-Git-Tag: 4.15.2~6
X-Git-Url: http://git.ipfire.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=69f74dbf8a2341aa73dc3f2213102eae1a3e49e0;p=thirdparty%2Fshadow.git

lib/cast.h: const_cast(): Reimplement with _Generic(3)

This makes it much simpler and portable.

Signed-off-by: Alejandro Colomar <alx@kernel.org>
---

diff --git a/lib/cast.h b/lib/cast.h
index 9229528d0..5cbbcf6dd 100644
--- a/lib/cast.h
+++ b/lib/cast.h
@@ -8,14 +8,8 @@
 
 #include <config.h>
 
-#include "must_be.h"
 
-
-#define const_cast(T, p)                                                      \
-({                                                                            \
-	static_assert(is_same_type(typeof(&*(p)), const T), "");              \
-	(T) (p);                                                              \
-})
+#define const_cast(T, p)  _Generic(p, const T:  (T) (p))
 
 
 #endif  // include guard