rcx

commit 798ef8714182bff677eb386c979d3b782b072667
parent f8a5e7a7327914847422e78ca23d16526d2e59eb
Author: Robert Russell <robertrussell.72001@gmail.com>
Date:   Sun, 13 Aug 2023 12:53:40 -0700

Add static_assert macro

Diffstat:
M
inc/def.h
 | 
4
++--
M
inc/rcx.h
 | 
8
++++++--

2 files changed, 8 insertions(+), 4 deletions(-)
diff --git a/inc/def.h b/inc/def.h
@@ -26,8 +26,8 @@
 #define MAX(a,b) ((a) > (b) ? (a) : (b))
 
 #define SWAP(a, b) do { \
-		/* The check in the array length is basically a static_assert. The
-		 * isize cast is needed, for otherwise -1 becomes unsigned. */ \
+		/* The check in the array size is basically a portable static_assert.
+		 * The isize cast is necessary; without it, -1 becomes unsigned. */ \
 		u8 r_swap_temp_[sizeof(a) == sizeof(b) ? (isize)sizeof(a) : -1]; \
 		memcpy(&r_swap_temp_, &(a), sizeof(a)); \
 		memcpy(&(a), &(b), sizeof(a)); \
diff --git a/inc/rcx.h b/inc/rcx.h
@@ -1,7 +1,5 @@
 #pragma once
 
-/* TODO: consistency check: cast style: (void*) vs (void *) */
-
 #include <inttypes.h>
 #include <stddef.h>
 
@@ -11,6 +9,12 @@
 #if __STDC_VERSION__ >= 201100L
 #include <stdalign.h>
 #include <stdnoreturn.h>
+/* We don't include assert.h, because we provide our own assert macro in
+ * debug.h, but we would still like C11's static_assert. In C23, static_assert
+ * becomes a keyword, so no define is necessary. */
+#if __STDC_VERSION__ < 202300L
+#define static_assert _Static_assert
+#endif
 #endif
 
 #include "def.h"