1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
|
// RUN: %clang_cc1 -fsyntax-only -std=c++11 -verify %s
template<typename T, typename U> struct pair { };
template<typename ...Types> struct tuple { };
template<typename T, typename U>
struct is_same {
static const bool value = false;
};
template<typename T>
struct is_same<T, T> {
static const bool value = true;
};
namespace ExpandIntoFixed {
template<typename T,
typename U,
typename V = pair<T, U>,
typename W = V*>
class X0 { };
template<typename ...Ts>
class X1 {
public:
typedef X0<Ts...> type;
};
static_assert(is_same<X1<int, int>::type,
X0<int, int, pair<int, int>, pair<int, int>*>>::value,
"fails with two default arguments");
static_assert(is_same<X1<int, int, float>::type,
X0<int, int, float, float*>>::value,
"fails with one default argument");
static_assert(is_same<X1<int, int, float, double>::type,
X0<int, int, float, double>>::value,
"fails with no default arguments");
}
namespace ExpandIntoFixedShifted {
template<typename T,
typename U,
typename V = pair<T, U>,
typename W = V*>
class X0 { };
template<typename ...Ts>
class X1 {
public:
typedef X0<char, Ts...> type;
};
static_assert(is_same<X1<int>::type,
X0<char, int, pair<char, int>, pair<char, int>*>>::value,
"fails with two default arguments");
static_assert(is_same<X1<int, float>::type,
X0<char, int, float, float*>>::value,
"fails with one default argument");
static_assert(is_same<X1<int, float, double>::type,
X0<char, int, float, double>>::value,
"fails with no default arguments");
}
namespace Deduction {
template <typename X, typename Y = double> struct Foo {};
template <typename ...Args> tuple<Args...> &foo(Foo<Args...>);
void call_foo(Foo<int, float> foo_if, Foo<int> foo_i) {
tuple<int, float> &t1 = foo(foo_if);
tuple<int, double> &t2 = foo(foo_i);
}
}
namespace PR9021a {
template<typename, typename>
struct A { };
template<typename ...T>
struct B {
A<T...> a1;
};
void test() {
B<int, int> c;
}
}
namespace PR9021b {
template<class, class>
struct t2
{
};
template<template<class...> class M>
struct m
{
template<class... B>
using inner = M<B...>;
};
m<t2> sta2;
}
namespace PartialSpecialization {
template<typename T, typename U, typename V = U>
struct X0; // expected-note 2{{template is declared here}}
template<typename ...Ts>
struct X0<Ts...> { // expected-error {{class template partial specialization is not more specialized than the primary template}}
};
X0<int> x0i; // expected-error{{too few template arguments for class template 'X0'}}
X0<int, float> x0if;
X0<int, float, double> x0ifd;
}
namespace FixedAliasTemplate {
template<typename,typename,typename> struct S {};
template<typename T, typename U> using U = S<T, int, U>; // expected-note 2{{template parameter is declared here}}
template<typename...Ts> U<Ts...> &f(U<Ts...>, Ts...); // expected-error 2{{pack expansion used as argument for non-pack parameter of alias template}}
S<int, int, double> &s1 = f({}, 0, 0.0); // expected-error {{no matching function}}
}
namespace PR18401 {
template<typename... Args> struct foo { };
template<typename T, typename... Args> using bar = foo<T, Args...>; // expected-note 2{{template parameter is declared here}} expected-note {{'bar' declared here}}
template<typename T, typename... Args> using baz = bar<Args..., T>; // expected-error {{pack expansion used as argument for non-pack parameter of alias template}}
// FIXME: We should still record the alias template, but mark it as invalid.
template<typename...T> void f(baz<T...>); // expected-error {{no template named 'baz'; did you mean 'bar'}} expected-error {{pack expansion used as argument for non-pack}}
void g() { f(foo<int, char, double>()); } // expected-error {{no matching function}}
}
|
