Make -Wformat check the argument type for %n.
This makes Clang check that the corresponding argument for "%n" in a
format string is a pointer to int.
git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@160966 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/test/Sema/format-strings-scanf.c b/test/Sema/format-strings-scanf.c
index e94af5a..2ce9484 100644
--- a/test/Sema/format-strings-scanf.c
+++ b/test/Sema/format-strings-scanf.c
@@ -121,3 +121,8 @@
scanf("%qd", x); // expected-warning{{format specifies type 'long long *' but the argument has type 'int *'}}
scanf("%qd", llx); // no-warning
}
+
+void test_writeback(int *x) {
+ scanf("%n", (void*)0); // expected-warning{{format specifies type 'int *' but the argument has type 'void *'}}
+ scanf("%n %c", x, x); // expected-warning{{format specifies type 'char *' but the argument has type 'int *'}}
+}