From: Mark Wooding <mdw@distorted.org.uk>
Date: Sun, 15 Jul 2018 18:26:55 +0000 (+0100)
Subject: utils/macros.h (N): Properly parenthesize the argument.
X-Git-Tag: 2.3.3~9
X-Git-Url: http://www.chiark.greenend.org.uk/ucgi/~mdw/git/mLib/commitdiff_plain/c066b1ff1cfc727cfd8409f79b4d2b990c678196

utils/macros.h (N): Properly parenthesize the argument.

WTF?  How did I write this wrong?

Fortunately, I don't think it actually matters.  The argument must have
array type.  Postfix operators are higher precedence, so that's not a
problem; prefix operators are in the right place already; and binary
operators don't yield array types.
---

diff --git a/utils/macros.h b/utils/macros.h
index bcceecd..8f9f49e 100644
--- a/utils/macros.h
+++ b/utils/macros.h
@@ -40,7 +40,7 @@
 
 /*----- Miscellaneous utility macros --------------------------------------*/
 
-#define N(v) (sizeof(v)/sizeof(*v))
+#define N(v) (sizeof(v)/sizeof(*(v)))
 
 #define MLIB__STR(x) #x
 #define STR(x) MLIB__STR(x)