X-Git-Url: http://git.ozlabs.org/?a=blobdiff_plain;f=ccan%2Fstr%2Ftest%2Fcompile_fail-islower.c;fp=ccan%2Fstr%2Ftest%2Fcompile_fail-islower.c;h=9dec95f69a0881cbe530a62c4e2abac849fda6d5;hb=ecea073699c60fd5aab9e3955f59a7042d637b68;hp=0000000000000000000000000000000000000000;hpb=3f4e83d8ac847d6bf0c20e88cdbca535e842a97b;p=ccan

diff --git a/ccan/str/test/compile_fail-islower.c b/ccan/str/test/compile_fail-islower.c
new file mode 100644
index 00000000..9dec95f6
--- /dev/null
+++ b/ccan/str/test/compile_fail-islower.c
@@ -0,0 +1,23 @@
+#define CCAN_STR_DEBUG 1
+#include <ccan/str/str.h>
+
+int main(int argc, char *argv[])
+{
+#ifdef FAIL
+#if !HAVE_BUILTIN_TYPES_COMPATIBLE_P || !HAVE_TYPEOF
+#error We need typeof to check islower.
+#endif
+	char
+#else
+	unsigned char
+#endif
+		c = argv[0][0];
+
+#ifdef FAIL
+	/* Fake fail on unsigned char platforms. */
+	c = 255;
+	BUILD_ASSERT(c < 0);
+#endif
+
+	return islower(c);
+}