p2-0x.cpp revision 8e8fb3be5bd78f0564444eca02b404566a5f3b5d 
1// RUN: %clang_cc1 -std=c++11 -fsyntax-only -verify %s
2// expected-no-diagnostics
3
4// If type deduction cannot be done for any P/A pair, or if for any
5// pair the deduction leads to more than one possible set of deduced
6// values, or if different pairs yield different deduced values, or if
7// any template argument remains neither deduced nor explicitly
8// specified, template argument deduction fails.
9
10template<typename ...> struct tuple;
11
12template<typename T, typename U>
13struct same_tuple {
14  static const bool value = false;
15};
16
17template<typename ...Types1>
18struct same_tuple<tuple<Types1...>, tuple<Types1...> > {
19  static const bool value = true;
20};
21
22int same_tuple_check1[same_tuple<tuple<int, float>, tuple<int, double>>::value? -1 : 1];
23int same_tuple_check2[same_tuple<tuple<float, double>, tuple<float, double>>::value? 1 : -1];
24
25