From: David Gibson <david@gibson.dropbear.id.au>
Date: Tue, 18 Aug 2015 23:17:02 +0000 (-0700)
Subject: bytestring: Add rational comment to testcase
X-Git-Url: http://git.ozlabs.org/?p=ccan;a=commitdiff_plain;h=088030222124fc906364f30dcdc945191ecd61e7

bytestring: Add rational comment to testcase

Reviewing the previous patch it took me some time to work out what the
purpose of the compile_fail-BYTESTRING-2.c test.  Add a comment to avoid
that in future.

Signed-off-by: David Gibson <david@gibson.dropbear.id.au>
---

diff --git a/ccan/bytestring/test/compile_fail-BYTESTRING-2.c b/ccan/bytestring/test/compile_fail-BYTESTRING-2.c
index 87dd7c7d..d4a610e2 100644
--- a/ccan/bytestring/test/compile_fail-BYTESTRING-2.c
+++ b/ccan/bytestring/test/compile_fail-BYTESTRING-2.c
@@ -4,6 +4,12 @@
 
 #include <ccan/bytestring/bytestring.h>
 
+/*
+ * BYTESTRING() can only be used safely on a literal string (or,
+ * strictly, something whose size can be determined with ARRAY_SIZE().
+ * This checks that it correctly fails to compile if used on a
+ * non-array pointer.
+ */
 int main(int argc, char *argv[])
 {
 	struct bytestring bs;