temp_arg_nontype_cxx1z.cpp revision 0e2c34f92f00628d48968dfea096d36381f494cb 
1// RUN: %clang_cc1 -fsyntax-only -verify -std=c++1z %s
2
3template<typename T, T val> struct A {};
4
5template<typename T, typename U> constexpr bool is_same = false; // expected-note +{{here}}
6template<typename T> constexpr bool is_same<T, T> = true;
7
8namespace String {
9  A<const char*, "test"> a; // expected-error {{does not refer to any declaration}}
10  A<const char (&)[5], "test"> b; // expected-error {{does not refer to any declaration}}
11}
12
13namespace Array {
14  char arr[3];
15  char x;
16  A<const char*, arr> a;
17  A<const char(&)[3], arr> b;
18  A<const char*, &arr[0]> c;
19  A<const char*, &arr[1]> d; // expected-error {{refers to subobject '&arr[1]'}}
20  A<const char*, (&arr)[0]> e;
21  A<const char*, &x> f;
22  A<const char*, &(&x)[0]> g;
23  A<const char*, &(&x)[1]> h; // expected-error {{refers to subobject '&x + 1'}}
24  A<const char*, 0> i; // expected-error {{not allowed in a converted constant}}
25  A<const char*, nullptr> j;
26}
27
28namespace Function {
29  void f();
30  void g() noexcept;
31  void h();
32  void h(int);
33  template<typename...T> void i(T...);
34  typedef A<void (*)(), f> a;
35  typedef A<void (*)(), &f> a;
36  typedef A<void (*)(), g> b;
37  typedef A<void (*)(), &g> b;
38  typedef A<void (*)(), h> c;
39  typedef A<void (*)(), &h> c;
40  typedef A<void (*)(), i> d;
41  typedef A<void (*)(), &i> d;
42  typedef A<void (*)(), i<>> d;
43  typedef A<void (*)(), i<int>> e; // expected-error {{is not implicitly convertible}}
44
45  typedef A<void (*)(), 0> x; // expected-error {{not allowed in a converted constant}}
46  typedef A<void (*)(), nullptr> y;
47}
48
49void Func() {
50  A<const char*, __func__> a; // expected-error {{does not refer to any declaration}}
51}
52
53namespace LabelAddrDiff {
54  void f() {
55    a: b: A<int, __builtin_constant_p(true) ? (__INTPTR_TYPE__)&&b - (__INTPTR_TYPE__)&&a : 0> s; // expected-error {{label address difference}}
56  };
57}
58
59namespace Temp {
60  struct S { int n; };
61  constexpr S &addr(S &&s) { return s; }
62  A<S &, addr({})> a; // expected-error {{constant}} expected-note 2{{temporary}}
63  A<S *, &addr({})> b; // expected-error {{constant}} expected-note 2{{temporary}}
64  A<int &, addr({}).n> c; // expected-error {{constant}} expected-note 2{{temporary}}
65  A<int *, &addr({}).n> d; // expected-error {{constant}} expected-note 2{{temporary}}
66}
67
68namespace std { struct type_info; }
69
70namespace RTTI {
71  A<const std::type_info&, typeid(int)> a; // expected-error {{does not refer to any declaration}}
72  A<const std::type_info*, &typeid(int)> b; // expected-error {{does not refer to any declaration}}
73}
74
75namespace PtrMem {
76  struct B { int b; };
77  struct C : B {};
78  struct D : B {};
79  struct E : C, D { int e; };
80
81  constexpr int B::*b = &B::b;
82  constexpr int C::*cb = b;
83  constexpr int D::*db = b;
84  constexpr int E::*ecb = cb; // expected-note +{{here}}
85  constexpr int E::*edb = db; // expected-note +{{here}}
86
87  constexpr int E::*e = &E::e;
88  constexpr int D::*de = (int D::*)e;
89  constexpr int C::*ce = (int C::*)e;
90  constexpr int B::*bde = (int B::*)de; // expected-note +{{here}}
91  constexpr int B::*bce = (int B::*)ce; // expected-note +{{here}}
92
93  // FIXME: This should all be accepted, but we don't yet have a representation
94  // nor mangling for this form of template argument.
95  using Ab = A<int B::*, b>;
96  using Ab = A<int B::*, &B::b>;
97  using Abce = A<int B::*, bce>; // expected-error {{not supported}}
98  using Abde = A<int B::*, bde>; // expected-error {{not supported}}
99  static_assert(!is_same<Ab, Abce>, ""); // expected-error {{undeclared}} expected-error {{must be a type}}
100  static_assert(!is_same<Ab, Abde>, ""); // expected-error {{undeclared}} expected-error {{must be a type}}
101  static_assert(!is_same<Abce, Abde>, ""); // expected-error 2{{undeclared}} expected-error {{must be a type}}
102  static_assert(is_same<Abce, A<int B::*, (int B::*)(int C::*)&E::e>, ""); // expected-error {{undeclared}} expected-error {{not supported}}
103
104  using Ae = A<int E::*, e>;
105  using Ae = A<int E::*, &E::e>;
106  using Aecb = A<int E::*, ecb>; // expected-error {{not supported}}
107  using Aedb = A<int E::*, edb>; // expected-error {{not supported}}
108  static_assert(!is_same<Ae, Aecb>, ""); // expected-error {{undeclared}} expected-error {{must be a type}}
109  static_assert(!is_same<Ae, Aedb>, ""); // expected-error {{undeclared}} expected-error {{must be a type}}
110  static_assert(!is_same<Aecb, Aedb>, ""); // expected-error 2{{undeclared}} expected-error {{must be a type}}
111  static_assert(is_same<Aecb, A<int E::*, (int E::*)(int C::*)&B::b>, ""); // expected-error {{undeclared}} expected-error {{not supported}}
112
113  using An = A<int E::*, nullptr>;
114  using A0 = A<int E::*, (int E::*)0>;
115  static_assert(is_same<An, A0>);
116}
117
118namespace DeduceDifferentType {
119  template<int N> struct A {};
120  template<long N> int a(A<N>); // expected-note {{does not have the same type}}
121  int a_imp = a(A<3>()); // expected-error {{no matching function}}
122  int a_exp = a<3>(A<3>());
123
124  template<decltype(nullptr)> struct B {};
125  template<int *P> int b(B<P>); // expected-note {{could not match}} expected-note {{not implicitly convertible}}
126  int b_imp = b(B<nullptr>()); // expected-error {{no matching function}}
127  int b_exp = b<nullptr>(B<nullptr>()); // expected-error {{no matching function}}
128
129  struct X { constexpr operator int() { return 0; } } x;
130  template<X &> struct C {};
131  template<int N> int c(C<N>); // expected-note {{does not have the same type}} expected-note {{not implicitly convertible}}
132  int c_imp = c(C<x>()); // expected-error {{no matching function}}
133  int c_exp = c<x>(C<x>()); // expected-error {{no matching function}}
134
135  struct Z;
136  struct Y { constexpr operator Z&(); } y;
137  struct Z { constexpr operator Y&() { return y; } } z;
138  constexpr Y::operator Z&() { return z; }
139  template<Y &> struct D {};
140  template<Z &z> int d(D<z>); // expected-note {{does not have the same type}}
141  int d_imp = d(D<y>()); // expected-error {{no matching function}}
142  int d_exp = d<y>(D<y>());
143}
144
145namespace DeclMatch {
146  template<typename T, T> int f();
147  template<typename T> class X { friend int f<T, 0>(); static int n; };
148  template<typename T, T> int f() { return X<T>::n; }
149  int k = f<int, 0>(); // ok, friend
150}
151