1 files changed, 88 insertions, 0 deletions
diff --git a/clang/test/CXX/temp/temp.fct.spec/temp.deduct/temp.deduct.call/p1-0x.cpp b/clang/test/CXX/temp/temp.fct.spec/temp.deduct/temp.deduct.call/p1-0x.cpp
new file mode 100644
index 0000000..8b192fa
--- /dev/null
+++ b/clang/test/CXX/temp/temp.fct.spec/temp.deduct/temp.deduct.call/p1-0x.cpp
@@ -0,0 +1,88 @@
+// RUN: %clang_cc1 -std=c++11 -fsyntax-only -verify %s
+
+// Metafunction to extract the Nth type from a set of types.
+template<unsigned N, typename ...Types> struct get_nth_type;
+
+template<unsigned N, typename Head, typename ...Tail>
+struct get_nth_type<N, Head, Tail...> : get_nth_type<N-1, Tail...> { };
+
+template<typename Head, typename ...Tail>
+struct get_nth_type<0, Head, Tail...> {
+  typedef Head type;
+};
+
+// Placeholder type  when get_nth_type fails.
+struct no_type {};
+
+template<unsigned N>
+struct get_nth_type<N> {
+  typedef no_type type;
+};
+
+template<typename T, typename U> struct pair { };
+template<typename T, typename U> pair<T, U> make_pair(T, U);
+
+// For a function parameter pack that occurs at the end of the
+// parameter-declaration-list, the type A of each remaining argument
+// of the call is compared with the type P of the declarator-id of the
+// function parameter pack.
+template<typename ...Args>
+typename get_nth_type<0, Args...>::type first_arg(Args...);
+
+template<typename ...Args>
+typename get_nth_type<1, Args...>::type second_arg(Args...);
+
+void test_simple_deduction(int *ip, float *fp, double *dp) {
+  int *ip1 = first_arg(ip);
+  int *ip2 = first_arg(ip, fp);
+  int *ip3 = first_arg(ip, fp, dp);
+  no_type nt1 = first_arg();
+}
+
+template<typename ...Args>
+typename get_nth_type<0, Args...>::type first_arg_ref(Args&...);
+
+template<typename ...Args>
+typename get_nth_type<1, Args...>::type second_arg_ref(Args&...);
+
+void test_simple_ref_deduction(int *ip, float *fp, double *dp) {
+  int *ip1 = first_arg_ref(ip);
+  int *ip2 = first_arg_ref(ip, fp);
+  int *ip3 = first_arg_ref(ip, fp, dp);
+  no_type nt1 = first_arg_ref();
+}
+
+
+template<typename ...Args1, typename ...Args2>
+typename get_nth_type<0, Args1...>::type first_arg_pair(pair<Args1, Args2>...); // expected-note{{candidate template ignored: failed template argument deduction}}
+
+template<typename ...Args1, typename ...Args2>
+typename get_nth_type<1, Args1...>::type second_arg_pair(pair<Args1, Args2>...);
+
+void test_pair_deduction(int *ip, float *fp, double *dp) {
+  int *ip1 = first_arg_pair(make_pair(ip, 17));
+  int *ip2 = first_arg_pair(make_pair(ip, 17), make_pair(fp, 17));
+  int *ip3 = first_arg_pair(make_pair(ip, 17), make_pair(fp, 17), 
+                            make_pair(dp, 17));
+  float *fp1 = second_arg_pair(make_pair(ip, 17), make_pair(fp, 17));
+  float *fp2 = second_arg_pair(make_pair(ip, 17), make_pair(fp, 17), 
+                               make_pair(dp, 17));
+  no_type nt1 = first_arg_pair();
+  no_type nt2 = second_arg_pair();
+  no_type nt3 = second_arg_pair(make_pair(ip, 17));
+
+
+  first_arg_pair(make_pair(ip, 17), 16); // expected-error{{no matching function for call to 'first_arg_pair'}}
+}
+
+// For a function parameter pack that does not occur at the end of the
+// parameter-declaration-list, the type of the parameter pack is a
+// non-deduced context.
+template<typename ...Types> struct tuple { };
+
+template<typename ...Types>
+void pack_not_at_end(tuple<Types...>, Types... values, int);
+
+void test_pack_not_at_end(tuple<int*, double*> t2) {
+  pack_not_at_end(t2, 0, 0, 0);
+}