clang/test/CXX/temp/temp.fct.spec/temp.deduct/temp.deduct.partial/p12.cpp

   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
  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
  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