Support the 'a' scanf length modifier as an extension in C++.
It should not be supported in C++11, since that uses the C99 standard
library, in which 'a' is a format specifier.
git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@147310 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/test/SemaCXX/format-strings.cpp b/test/SemaCXX/format-strings.cpp
new file mode 100644
index 0000000..2011a71
--- /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);
+}