1 // RUN: %clang_cc1 -std=c++11 -fsyntax-only -verify %s
2
3 // Note: Partial ordering of function templates containing template
4 // parameter packs is independent of the number of deduced arguments
5 // for those template parameter packs.
6 template<class ...> struct Tuple { };
7 template<class ... Types> int &g(Tuple<Types ...>); // #1
8 template<class T1, class ... Types> float &g(Tuple<T1, Types ...>); // #2
9 template<class T1, class ... Types> double &g(Tuple<T1, Types& ...>); // #3
10
test_g()11 void test_g() {
12 int &ir1 = g(Tuple<>());
13 float &fr1 = g(Tuple<int, float>());
14 double &dr1 = g(Tuple<int, float&>());
15 double &dr2 = g(Tuple<int>());
16 }
17
18 template<class ... Types> int &h(int (*)(Types ...)); // #1
19 template<class T1, class ... Types> float &h(int (*)(T1, Types ...)); // #2
20 template<class T1, class ... Types> double &h(int (*)(T1, Types& ...)); // #3
21
test_h()22 void test_h() {
23 int &ir1 = h((int(*)())0);
24 float &fr1 = h((int(*)(int, float))0);
25 double &dr1 = h((int(*)(int, float&))0);
26 double &dr2 = h((int(*)(int))0);
27 }
28
29 namespace test_j {
30
31 template <int I> struct ref {};
32
33 template <int... L> void map(ref<L>...);
34 template <int head, int... tail> void map(ref<head> x, ref<tail>... xs); // expected-note {{here}}
35
36 template void map<0, 1>(ref<0>, ref<1>);
37 // expected-error@-1 {{explicit instantiation of undefined function template 'map'}}
38
39 } // namespace test_j
40