From: Timo Sirainen <timo.sirainen@open-xchange.com>
Date: Sat, 3 Dec 2022 11:46:02 +0000 (+0200)
Subject: lib: Add static_assert_array_size()
X-Git-Tag: 2.4.0~3296
X-Git-Url: http://git.ipfire.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=ad7e11fe21394b1862d65a54e1aec0828efcb2d8;p=thirdparty%2Fdovecot%2Fcore.git

lib: Add static_assert_array_size()

This is a simple way to make sure array size matches the given count,
or give a compile time error if not.
---

diff --git a/src/lib/lib.h b/src/lib/lib.h
index 13e41d855f..2b1ecde41d 100644
--- a/src/lib/lib.h
+++ b/src/lib/lib.h
@@ -63,6 +63,9 @@ typedef void lib_atexit_callback_t(void);
 #define LIB_ATEXIT_PRIORITY_DEFAULT 0
 #define LIB_ATEXIT_PRIORITY_LOW 10
 
+#define static_assert_array_size(arr, count) \
+	static_assert(N_ELEMENTS(arr) == (count), "array/enum size mismatch")
+
 /* /dev/null opened as O_WRONLY. Opened at lib_init(), so it can be accessed
    also inside chroots. */
 extern int dev_null_fd;