1// RUN: %clang_cc1 -std=c++11 -fsyntax-only -fcxx-exceptions -fexceptions -verify %s
2
3// When it is part of a parameter-declaration-clause, the parameter
4// pack is a function parameter pack.
5template<typename ...Types>
6void f0(Types ...args);
7
8template<typename ...Types>
9void f1(const Types &...args);
10
11// [ Note: Otherwise, the parameter-declaration is part of a
12// template-parameter-list and the parameter pack is a template
13// parameter pack; see 14.1. -- end note ]
14template<int ...N>
15struct X0 { };
16
17template<typename ...Types>
18struct X1 {
19  template<Types ...Values> struct Inner;
20};
21
22// A declarator-id or abstract-declarator containing an ellipsis shall
23// only be used in a parameter-declaration.
24int (...f2)(int); // expected-error{{only function and template parameters can be parameter packs}}
25
26void f3() {
27  int ...x; // expected-error{{only function and template parameters can be parameter packs}}
28  if (int ...y = 17) { }  // expected-error{{only function and template parameters can be parameter packs}}
29
30  for (int ...z = 0; z < 10; ++z) { }  // expected-error{{only function and template parameters can be parameter packs}}
31
32  try {
33  } catch (int ...e) { // expected-error{{only function and template parameters can be parameter packs}}
34  }
35}
36
37template<typename ...Types>
38struct X2 {
39  Types ...members; // expected-error{{only function and template parameters can be parameter packs}} \
40                    // expected-error{{data member type contains unexpanded parameter pack}}
41};
42
43// The type T of the declarator-id of the function parameter pack
44// shall contain a template parameter pack; each template parameter
45// pack in T is expanded by the function parameter pack.
46template<typename T>
47void f4(T ...args); // expected-error{{type 'T' of function parameter pack does not contain any unexpanded parameter packs}}
48
49