1 files changed, 48 insertions, 0 deletions
diff --git a/test/SemaCXX/vararg-class.cpp b/test/SemaCXX/vararg-class.cpp
new file mode 100644
index 000000000000..08f521cbd539
--- /dev/null
+++ b/test/SemaCXX/vararg-class.cpp
@@ -0,0 +1,48 @@
+// RUN: %clang_cc1 -verify -Wclass-varargs -std=c++98 %s
+// RUN: %clang_cc1 -verify -Wclass-varargs -std=c++11 %s
+
+struct A {};
+struct B { ~B(); };
+class C { char *c_str(); };
+struct D { char *c_str(); };
+struct E { E(); };
+struct F { F(); char *c_str(); };
+
+void v(...);
+void w(const char*, ...) __attribute__((format(printf, 1, 2)));
+
+void test(A a, B b, C c, D d, E e, F f) {
+  v(a); // expected-warning-re {{passing object of class type 'A' through variadic function{{$}}}}
+  v(b); // expected-error-re {{cannot pass object of non-{{POD|trivial}} type 'B' through variadic function; call will abort at runtime}}
+  v(c); // expected-warning {{passing object of class type 'C' through variadic function; did you mean to call '.c_str()'?}}
+  v(d); // expected-warning {{passing object of class type 'D' through variadic function; did you mean to call '.c_str()'?}}
+  v(e);
+  v(f);
+#if __cplusplus < 201103L
+  // expected-error@-3 {{cannot pass object of non-POD type 'E' through variadic function; call will abort at runtime}}
+  // expected-error@-3 {{cannot pass object of non-POD type 'F' through variadic function; call will abort at runtime}}
+#else
+  // expected-warning-re@-6 {{passing object of class type 'E' through variadic function{{$}}}}
+  // expected-warning@-6 {{passing object of class type 'F' through variadic function; did you mean to call '.c_str()'?}}
+#endif
+
+  v(d.c_str());
+  v(f.c_str());
+  v(0);
+  v('x');
+
+  w("%s", a); // expected-warning {{format specifies type 'char *' but the argument has type 'A'}}
+  w("%s", b); // expected-error-re {{cannot pass non-{{POD|trivial}} object of type 'B' to variadic function; expected type from format string was 'char *'}}
+  w("%s", c); // expected-warning {{format specifies type 'char *' but the argument has type 'C'}}
+  w("%s", d); // expected-warning {{format specifies type 'char *' but the argument has type 'D'}}
+  w("%s", e);
+  w("%s", f);
+#if __cplusplus < 201103L
+  // expected-error@-3 {{cannot pass non-POD object of type 'E' to variadic function; expected type from format string was 'char *'}}
+  // expected-error@-3 {{cannot pass non-POD object of type 'F' to variadic function; expected type from format string was 'char *'}}
+  // expected-note@-4 {{did you mean to call the c_str() method?}}
+#else
+  // expected-warning@-7 {{format specifies type 'char *' but the argument has type 'E'}}
+  // expected-warning@-7 {{format specifies type 'char *' but the argument has type 'F'}}
+#endif
+}