p9-0x.cpp revision d89d86fe4acaa4782b0ed8a684bbc1b32cb48b70 
1// RUN: %clang_cc1 -std=c++0x -fsyntax-only -verify %s
2
3// A default template-argument may be specified for any kind of
4// template-parameter that is not a template parameter pack.
5template<typename ...Types = int> // expected-error{{template parameter pack cannot have a default argument}}
6struct X0;
7
8template<int ...Values = 0> // expected-error{{template parameter pack cannot have a default argument}}
9struct X1;
10
11template<typename T> struct vector;
12
13template<template<class> class ...Templates = vector> // expected-error{{template parameter pack cannot have a default argument}}
14struct X2;
15
16struct X3 {
17  template<typename T = int> // expected-error{{default template argument not permitted on a friend template}}
18  friend void f0(X3);
19
20  template<typename T = int>
21  friend void f1(X3) {
22  }
23};
24
25namespace PR8747 {
26  // Testcase 1
27  struct A0 { template<typename U> struct B; };
28  template<typename U = int> struct A0::B { }; // expected-error{{cannot add a default template argument to the definition of a member of a class template}}
29
30  // Testcase 2
31  template<typename T> struct A1 { template<typename U> struct B; };
32  template<typename T> template<typename U = int> struct A1<T>::B { }; // expected-error{{cannot add a default template argument to the definition of a member of a class template}}
33
34  // Testcase 3
35  template<typename T>
36  struct X2 {
37    void f0();
38    template<typename U> void f1();
39  };
40
41  template<typename T = int> void X2<T>::f0() { } // expected-error{{cannot add a default template argument to the definition of a member of a class template}}
42  template<typename T> template<typename U = int> void X2<T>::f1() { } // expected-error{{cannot add a default template argument to the definition of a member of a class template}}
43
44  namespace Inner {
45    template<typename T> struct X3;
46    template<typename T> void f2();
47  }
48
49  // Okay; not class members.
50  template<typename T = int> struct Inner::X3 { };
51  template<typename T = int> void Inner::f2() {}
52}
53