X-Git-Url: https://git.ozlabs.org/?a=blobdiff_plain;f=ccan%2Fbytestring%2Ftest%2Fcompile_fail-BYTESTRING-2.c;h=d4a610e250e5bb0c0d3620e11fca944dac961a18;hb=f6557ca6537bc4d37fb4be215184a632533ba4e7;hp=87dd7c7d2ed14bff965bbba30dd09248c2362ffc;hpb=5e6869e73336cbbcaff4412738a154de814ffc4f;p=ccan

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;