From 72cd1c2a584d89e76a5e9e7deaf07ddc4196d1aa Mon Sep 17 00:00:00 2001
From: Tavian Barnes <tavianator@tavianator.com>
Date: Thu, 11 May 2023 14:07:54 -0400
Subject: diag: New bfs_static_assert() macro

---
 src/diag.h | 12 +++++++++++-
 1 file changed, 11 insertions(+), 1 deletion(-)

(limited to 'src/diag.h')

diff --git a/src/diag.h b/src/diag.h
index 987d4b4..a086942 100644
--- a/src/diag.h
+++ b/src/diag.h
@@ -2,7 +2,7 @@
 // SPDX-License-Identifier: 0BSD
 
 /**
- * Formatters for diagnostic messages.
+ * Diagnostic messages.
  */
 
 #ifndef BFS_DIAG_H
@@ -12,6 +12,16 @@
 #include "config.h"
 #include <stdarg.h>
 
+/**
+ * static_assert() with an optional second argument.
+ */
+#if __STDC_VERSION__ >= 202311L
+#  define bfs_static_assert static_assert
+#else
+#  define bfs_static_assert(...) BFS_STATIC_ASSERT(__VA_ARGS__, #__VA_ARGS__, )
+#  define BFS_STATIC_ASSERT(expr, msg, ...) _Static_assert(expr, msg)
+#endif
+
 struct bfs_expr;
 
 /**
-- 
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