X-Git-Url: http://git.ozlabs.org/?p=ccan;a=blobdiff_plain;f=ccan%2Fcontainer_of%2Ftest%2Fcompile_fail-bad-type.c;fp=ccan%2Fcontainer_of%2Ftest%2Fcompile_fail-bad-type.c;h=01dfd454597d0eb7d43244a3af81396e1648fc70;hp=0000000000000000000000000000000000000000;hb=650c775ff00cccd03fc84e7789a03c51d9839004;hpb=c8acddea39d222312102952e91c32cfe4dd2cea0

diff --git a/ccan/container_of/test/compile_fail-bad-type.c b/ccan/container_of/test/compile_fail-bad-type.c
new file mode 100644
index 00000000..01dfd454
--- /dev/null
+++ b/ccan/container_of/test/compile_fail-bad-type.c
@@ -0,0 +1,22 @@
+#include "container_of/container_of.h"
+#include <stdlib.h>
+
+struct foo {
+	int a;
+	char b;
+};
+
+int main(int argc, char *argv[])
+{
+	struct foo foo = { .a = 1, .b = 2 };
+	int *intp = &foo.a;
+	char *p;
+
+#ifdef FAIL
+	/* p is a char *, but this gives a struct foo * */
+	p = container_of(intp, struct foo, a);
+#else
+	p = (char *)intp;
+#endif
+	return p == NULL;
+}