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Diffstat (limited to 'lib/ccan/cast/test/compile_fail-cast_signed-const.c')
-rw-r--r--lib/ccan/cast/test/compile_fail-cast_signed-const.c22
1 files changed, 22 insertions, 0 deletions
diff --git a/lib/ccan/cast/test/compile_fail-cast_signed-const.c b/lib/ccan/cast/test/compile_fail-cast_signed-const.c
new file mode 100644
index 0000000000..9971dc8eb3
--- /dev/null
+++ b/lib/ccan/cast/test/compile_fail-cast_signed-const.c
@@ -0,0 +1,22 @@
+#include <ccan/cast/cast.h>
+#include <stdlib.h>
+
+int main(int argc, char *argv[])
+{
+ unsigned char *uc;
+#ifdef FAIL
+ const
+#endif
+ char
+ *p = NULL;
+
+ uc = cast_signed(unsigned char *, p);
+ (void) uc; /* Suppress unused-but-set-variable warning. */
+ return 0;
+}
+
+#ifdef FAIL
+#if !HAVE_TYPEOF||!HAVE_BUILTIN_CHOOSE_EXPR||!HAVE_BUILTIN_TYPES_COMPATIBLE_P
+#error "Unfortunately we don't fail if cast_const can only use size"
+#endif
+#endif