1 // RUN: %clang_cc1 -std=c++11 -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. 5 template<typename ...Types = int> // expected-error{{template parameter pack cannot have a default argument}} 6 struct X0; 7 8 template<int ...Values = 0> // expected-error{{template parameter pack cannot have a default argument}} 9 struct X1; 10 11 template<typename T> struct vector; 12 13 template<template<class> class ...Templates = vector> // expected-error{{template parameter pack cannot have a default argument}} 14 struct X2; 15 16 struct 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 25 namespace PR8748 { 26 // Testcase 1 27 struct A0 { template<typename U> struct B; }; 28 template<typename U = int> struct A0::B { }; 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 54 namespace PR10069 { 55 template<typename T, T a, T b=0, T c=1> 56 T f(T x); 57 58 void g() { 59 f<unsigned int, 0>(0); 60 } 61 } 62
