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
|
// RUN: %clang_cc1 -std=c++1y -verify -fsyntax-only -fblocks %s
// RUN: %clang_cc1 -std=c++1y -verify -fsyntax-only -fblocks -fdelayed-template-parsing %s -DDELAYED_TEMPLATE_PARSING
// RUN: %clang_cc1 -std=c++1y -verify -fsyntax-only -fblocks -fms-extensions %s -DMS_EXTENSIONS
// RUN: %clang_cc1 -std=c++1y -verify -fsyntax-only -fblocks -fdelayed-template-parsing -fms-extensions %s -DMS_EXTENSIONS -DDELAYED_TEMPLATE_PARSING
// RUN: %clang_cc1 -std=c++1y -verify -fsyntax-only -fblocks -triple i386-windows %s
// RUN: %clang_cc1 -std=c++1y -verify -fsyntax-only -fblocks -triple i386-windows -fdelayed-template-parsing %s -DDELAYED_TEMPLATE_PARSING
// RUN: %clang_cc1 -std=c++1y -verify -fsyntax-only -fblocks -triple i386-windows -fms-extensions %s -DMS_EXTENSIONS
// RUN: %clang_cc1 -std=c++1y -verify -fsyntax-only -fblocks -triple i386-windows -fdelayed-template-parsing -fms-extensions %s -DMS_EXTENSIONS -DDELAYED_TEMPLATE_PARSING
namespace explicit_argument_variadics {
template<class ... Ts> void print(Ts ... ) { }
struct X { };
struct Y { };
struct Z { };
int test() {
{
auto L = [](auto ... as) { };
L.operator()<bool>(true);
}
{
auto L = [](auto a) { };
L.operator()<bool>(false);
}
{
auto L = [](auto a, auto b) { };
L.operator()<bool>(false, 'a');
}
{
auto L = [](auto a, auto b) { };
L.operator()<bool, char>(false, 'a');
}
{
auto L = [](auto a, auto b, auto ... cs) { };
L.operator()<bool, char>(false, 'a');
L.operator()<bool, char, const char*>(false, 'a', "jim");
}
{
auto L = [](auto ... As) {
};
L.operator()<bool, double>(false, 3.14, "abc");
}
{
auto L = [](auto A, auto B, auto ... As) {
};
L.operator()<bool>(false, 3.14, "abc");
L.operator()<bool, char>(false, 3.14, "abc"); //expected-warning{{implicit conversion}}
L.operator()<X, Y, bool, Z>(X{}, Y{}, 3.14, Z{}, X{}); //expected-warning{{implicit conversion}}
}
{
auto L = [](auto ... As) {
print("\nL::As = ", As ...);
return [](decltype(As) ... as, auto ... Bs) {
print("\nL::Inner::as = ", as ...);
print("\nL::Inner::Bs = ", Bs ...);
return 4;
};
};
auto M = L.operator()<bool, double>(false, 3.14, "abc");
M(false, 6.26, "jim", true);
M.operator()<bool>(true, 6.26, "jim", false, 3.14);
}
{
auto L = [](auto A, auto ... As) {
print("\nL::As = ", As ...);
return [](decltype(As) ... as, decltype(A) a, auto ... Bs) {
print("\nL::Inner::as = ", as ...);
print("\nL::Inner::Bs = ", Bs ...);
return 4;
};
};
auto M = L.operator()<bool, double>(false, 3.14, "abc");
M(6.26, "jim", true);
M.operator()<X>(6.26, "jim", false, X{}, Y{}, Z{});
}
return 0;
}
int run = test();
} // end ns explicit_argument_extension
#ifdef PR18499_FIXED
namespace variadic_expansion {
void f(int &, char &);
template <typename ... T> void g(T &... t) {
f([&a(t)]()->decltype(auto) {
return a;
}() ...);
f([&a(f([&b(t)]()->decltype(auto) { return b; }()...), t)]()->decltype(auto) {
return a;
}()...);
}
void h(int i, char c) { g(i, c); }
}
#endif
namespace PR33082 {
template<int ...I> void a() {
int arr[] = { [](auto ...K) { (void)I; } ... }; // expected-error {{no viable conversion}} expected-note {{candidate}}
}
template<typename ...T> struct Pack {};
template<typename ...T, typename ...U> void b(Pack<U...>, T ...t) {
int arr[] = {[t...]() { // expected-error 2{{cannot initialize an array element of type 'int' with}}
U u;
return u;
}()...};
}
void c() {
int arr[] = {[](auto... v) {
v; // expected-error {{unexpanded parameter pack 'v'}}
}...}; // expected-error {{pack expansion does not contain any unexpanded parameter packs}}
}
void run() {
a<1>(); // expected-note {{instantiation of}}
b(Pack<int*, float*>(), 1, 2, 3); // expected-note {{instantiation of}}
}
}
void pr42587() {
(void)[](auto... args) -> decltype(args) {}; // expected-error {{type contains unexpanded parameter pack}}
(void)[](auto... args, int = args) {}; // expected-error {{default argument contains unexpanded parameter pack}}
(void)[](auto... args, decltype(args)) {}; // expected-error {{type contains unexpanded parameter pack}}
(void)[](auto... args, decltype(args)...) {}; // (ok)
(void)[](auto... args, int = [=] { return args; }()) {}; // expected-error {{default argument contains unexpanded parameter pack}}
(void)([]<typename ...T> (T t) {} + ...); // expected-error {{contains unexpanded parameter pack 'T'}} expected-error {{does not contain any unexpanded}} expected-warning 0-2{{extension}}
(void)([]<int ...N> (int k = N) {} + ...); // expected-error {{contains unexpanded parameter pack 'N'}} expected-error {{does not contain any unexpanded}} expected-warning 0-2{{extension}}
(void)([]<template<typename> typename ...T> (T<int>) {} + ...); // expected-error {{contains unexpanded parameter pack 'T'}} expected-error {{does not contain any unexpanded}} expected-warning 0-3{{extension}}
}
template<typename ...T> int v = {[...x = T()] { int k = x; } ...}; // expected-error {{contains unexpanded parameter pack 'x'}} expected-error {{does not contain any unexpanded}} expected-warning 0-1{{extension}}
|
