blob: 983b37092f8f0b0133a5f62e99ed69fd411c806e (
plain)
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
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
|
// { dg-do compile { target c++17_only } }
// { dg-options "-fconcepts-ts" }
#include <cassert>
#include <type_traits>
template<typename T>
concept bool C() { return __is_class(T); }
template<typename T>
concept bool Type() { return true; }
struct S { };
int called;
// Basic terse notation
void f(auto x) { called = 1; }
void g(C x) { called = 2; }
// Overloading generic functions
void h(auto x) { called = 1; }
void h(C x) { called = 2; }
void p(auto x);
void p(C x);
struct S1 {
void f1(auto x) { called = 1; }
void f2(C x) { called = 2; }
void f3(auto x) { called = 1; }
void f3(C x) { called = 2; }
};
template<C T>
struct S2 {
void f1(auto x) { called = 1; }
void f2(C x) { called = 2; }
void f3(auto x) { called = 1; }
void f3(C x) { called = 2; }
void h1(auto x);
void h2(C x);
void h3(auto x);
void h3(C x);
template<C U>
void g1(T t, U u) { called = 1; }
template<C U>
void g2(T t, U u);
};
void ptr(C*) { called = 1; }
void ptr(const C*) { called = 2; }
void ref(C&) { called = 1; }
void ref(const C&) { called = 2; }
void
fwd_lvalue_ref(Type&& x) {
using T = decltype(x);
static_assert(std::is_lvalue_reference<T>::value, "not an lvlaue reference");
}
void
fwd_const_lvalue_ref(Type&& x) {
using T = decltype(x);
static_assert(std::is_lvalue_reference<T>::value, "not an lvalue reference");
using U = typename std::remove_reference<T>::type;
static_assert(std::is_const<U>::value, "not const-qualified");
}
void fwd_rvalue_ref(Type&& x) {
using T = decltype(x);
static_assert(std::is_rvalue_reference<T>::value, "not an rvalue reference");
}
// Make sure we can use nested names speicifers for concept names.
namespace N {
template<typename T>
concept bool C() { return true; }
} // namesspace N
void foo(N::C x) { }
int main() {
S s;
const S cs;
f(0); assert(called == 1);
g(s); assert(called == 2);
h(0); assert(called == 1);
h(s); assert(called == 2);
S1 s1;
s1.f1(0); assert(called == 1);
s1.f2(s); assert(called == 2);
s1.f3(0); assert(called == 1);
s1.f3(s); assert(called == 2);
S2<S> s2;
s2.f1(0); assert(called == 1);
s2.f2(s); assert(called == 2);
s2.f3(0); assert(called == 1);
s2.f3(s); assert(called == 2);
s2.h1(0); assert(called == 1);
s2.h2(s); assert(called == 2);
s2.h3(0); assert(called == 1);
s2.h3(s); assert(called == 2);
s2.g1(s, s); assert(called == 1);
s2.g2(s, s); assert(called == 2);
ptr(&s); assert(called == 1);
ptr(&cs); assert(called == 2);
ref(s); assert(called == 1);
ref(cs); assert(called == 2);
// Check forwarding problems
fwd_lvalue_ref(s);
fwd_const_lvalue_ref(cs);
fwd_rvalue_ref(S());
foo(0);
}
// Test that decl/def matching works.
void p(auto x) { called = 1; }
void p(C x) { called = 2; }
template<C T>
void S2<T>::h1(auto x) { called = 1; }
template<C T>
void S2<T>::h2(C x) { called = 2; }
template<C T>
void S2<T>::h3(auto x) { called = 1; }
template<C T>
void S2<T>::h3(C x) { called = 2; }
template<C T>
template<C U>
void S2<T>::g2(T t, U u) { called = 2; }
|
