| 1 | // RUN: %clang_cc1 -fsyntax-only -verify %s |
| 2 | // RUN: %clang_cc1 -fsyntax-only -verify -std=c++98 %s |
| 3 | // RUN: %clang_cc1 -fsyntax-only -verify -std=c++11 %s |
| 4 | |
| 5 | template<template<typename T> class X> struct A; // expected-note 2{{previous template template parameter is here}} |
| 6 | |
| 7 | template<template<typename T, int I> class X> struct B; // expected-note{{previous template template parameter is here}} |
| 8 | |
| 9 | template<template<int I> class X> struct C; // expected-note 2{{previous non-type template parameter with type 'int' is here}} |
| 10 | |
| 11 | template<class> struct X; // expected-note{{too few template parameters in template template argument}} |
| 12 | template<int N> struct Y; // expected-note{{template parameter has a different kind in template argument}} |
| 13 | template<long N> struct Ylong; // expected-note{{template non-type parameter has a different type 'long' in template argument}} |
| 14 | template<const int &N> struct Yref; // expected-note{{template non-type parameter has a different type 'const int &' in template argument}} |
| 15 | |
| 16 | namespace N { |
| 17 | template<class> struct Z; |
| 18 | } |
| 19 | template<class, class> struct TooMany; // expected-note{{too many template parameters in template template argument}} |
| 20 | |
| 21 | |
| 22 | A<X> *a1; |
| 23 | A<N::Z> *a2; |
| 24 | A< ::N::Z> *a3; |
| 25 | |
| 26 | A<Y> *a4; // expected-error{{template template argument has different template parameters than its corresponding template template parameter}} |
| 27 | A<TooMany> *a5; // expected-error{{template template argument has different template parameters than its corresponding template template parameter}} |
| 28 | B<X> *a6; // expected-error{{template template argument has different template parameters than its corresponding template template parameter}} |
| 29 | C<Y> *a7; |
| 30 | C<Ylong> *a8; // expected-error{{template template argument has different template parameters than its corresponding template template parameter}} |
| 31 | C<Yref> *a9; // expected-error{{template template argument has different template parameters than its corresponding template template parameter}} |
| 32 | |
| 33 | template<typename T> void f(int); |
| 34 | |
| 35 | A<f> *a9; // expected-error{{must be a class template}} |
| 36 | |
| 37 | // Evil digraph '<:' is parsed as '[', expect error. |
| 38 | A<::N::Z> *a10; |
| 39 | #if __cplusplus <= 199711L |
| 40 | // expected-error@-2 {{found '<::' after a template name which forms the digraph '<:' (aka '[') and a ':', did you mean '< ::'?}} |
| 41 | #endif |
| 42 | |
| 43 | // Do not do a digraph correction here. |
| 44 | A<: :N::Z> *a11; // expected-error{{expected expression}} \ |
| 45 | expected-error{{C++ requires a type specifier for all declarations}} |
| 46 | |
| 47 | // PR7807 |
| 48 | namespace N { |
| 49 | template <typename, typename = int> |
| 50 | struct X |
| 51 | { }; |
| 52 | |
| 53 | template <typename ,int> |
| 54 | struct Y |
| 55 | { X<int> const_ref(); }; |
| 56 | |
| 57 | template <template<typename,int> class TT, typename T, int N> |
| 58 | int operator<<(int, TT<T, N> a) { // expected-note{{candidate template ignored}} |
| 59 | 0 << a.const_ref(); // expected-error{{invalid operands to binary expression ('int' and 'X<int>')}} |
| 60 | } |
| 61 | |
| 62 | void f0( Y<int,1> y){ 1 << y; } // expected-note{{in instantiation of function template specialization 'N::operator<<<Y, int, 1>' requested here}} |
| 63 | } |
| 64 | |
| 65 | // PR12179 |
| 66 | template <typename Primitive, template <Primitive...> class F> |
| 67 | #if __cplusplus <= 199711L |
| 68 | // expected-warning@-2 {{variadic templates are a C++11 extension}} |
| 69 | #endif |
| 70 | |
| 71 | struct unbox_args { |
| 72 | typedef typename Primitive::template call<F> x; |
| 73 | }; |
| 74 | |
| 75 | template <template <typename> class... Templates> |
| 76 | #if __cplusplus <= 199711L |
| 77 | // expected-warning@-2 {{variadic templates are a C++11 extension}} |
| 78 | #endif |
| 79 | |
| 80 | struct template_tuple { |
| 81 | #if __cplusplus >= 201103L |
| 82 | static constexpr int N = sizeof...(Templates); |
| 83 | #endif |
| 84 | }; |
| 85 | template <typename T> |
| 86 | struct identity {}; |
| 87 | template <template <typename> class... Templates> |
| 88 | #if __cplusplus <= 199711L |
| 89 | // expected-warning@-2 {{variadic templates are a C++11 extension}} |
| 90 | #endif |
| 91 | |
| 92 | template_tuple<Templates...> f7() {} |
| 93 | |
| 94 | #if __cplusplus >= 201103L |
| 95 | struct S : public template_tuple<identity, identity> { |
| 96 | static_assert(N == 2, "Number of template arguments incorrect"); |
| 97 | }; |
| 98 | #endif |
| 99 | |
| 100 | void foo() { |
| 101 | f7<identity>(); |
| 102 | } |
| 103 | |
| 104 | namespace CheckDependentNonTypeParamTypes { |
| 105 | template<template<typename T, typename U, T v> class X> struct A { |
| 106 | void f() { |
| 107 | X<int, void*, 3> x; // expected-error {{does not refer to any declaration}} |
| 108 | } |
| 109 | void g() { |
| 110 | X<int, long, 3> x; |
| 111 | } |
| 112 | void h() { |
| 113 | // FIXME: If we accept A<B> at all, it's not obvious what should happen |
| 114 | // here. While parsing the template, we form |
| 115 | // X<unsigned char, int, (unsigned char)1234> |
| 116 | // but in the final instantiation do we get |
| 117 | // B<unsigned char, int, (int)1234> |
| 118 | // or |
| 119 | // B<unsigned char, int, (int)(unsigned char)1234> |
| 120 | // ? |
| 121 | X<unsigned char, int, 1234> x; |
| 122 | int check[x.value == 1234 ? 1 : -1]; |
| 123 | } |
| 124 | }; |
| 125 | |
| 126 | template<typename T, typename U, U v> struct B { // expected-note {{parameter}} |
| 127 | static const U value = v; |
| 128 | }; |
| 129 | |
| 130 | // FIXME: This should probably be rejected, but the rules are at best unclear. |
| 131 | A<B> ab; |
| 132 | |
| 133 | void use() { |
| 134 | ab.f(); // expected-note {{instantiation of}} |
| 135 | ab.g(); |
| 136 | ab.h(); |
| 137 | } |
| 138 | } |
| 139 | |
| 140 | namespace PR32185 { |
| 141 | template<template<typename T, T> class U> struct A {}; |
| 142 | template<template<typename T, T> class U> struct B : A<U> {}; |
| 143 | } |
| 144 | |
| 145 | namespace PR10147 { |
| 146 | template<typename T> struct A {}; |
| 147 | template<typename T = int> struct A; |
| 148 | template<template<typename...> class A> void f(A<int>*) { A<> a; } // expected-warning 0-1{{extension}} |
| 149 | void g() { f((A<>*)0); } |
| 150 | } |
| 151 | |