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.
5 template<typename ...Types>
6 void f0(Types ...args);
7
8 template<typename ...Types>
9 void 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 ]
14 template<int ...N>
15 struct X0 { };
16
17 template<typename ...Types>
18 struct 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.
24 int (...f2)(int); // expected-error{{only function and template parameters can be parameter packs}}
25
f3()26 void 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
37 template<typename ...Types>
38 struct 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.
46 template<typename T>
47 void f4(T ...args); // expected-error{{type 'T' of function parameter pack does not contain any unexpanded parameter packs}}
48
49