1 files changed, 15 insertions, 0 deletions
diff --git a/test/SemaCXX/format-strings.cpp b/test/SemaCXX/format-strings.cpp
new file mode 100644
index 0000000000..2011a71b48
--- /dev/null
+++ b/test/SemaCXX/format-strings.cpp
@@ -0,0 +1,15 @@
+// RUN: %clang_cc1 -fsyntax-only -verify -pedantic %s
+
+extern "C" {
+extern int scanf(const char *restrict, ...);
+extern int printf(const char *restrict, ...);
+}
+
+void f(char **sp, float *fp) {
+  // TODO: Warn that the 'a' length modifier is an extension.
+  scanf("%as", sp);
+
+  // TODO: Warn that the 'a' conversion specifier is a C++11 feature.
+  printf("%a", 1.0);
+  scanf("%afoobar", fp);
+}