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
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
|
// RUN: %clang_cc1 -std=c++11 -emit-llvm %s -o - -triple=x86_64-apple-darwin9 | FileCheck %s
namespace std {
typedef decltype(sizeof(int)) size_t;
// libc++'s implementation
template <class _E>
class initializer_list
{
const _E* __begin_;
size_t __size_;
initializer_list(const _E* __b, size_t __s)
: __begin_(__b),
__size_(__s)
{}
public:
typedef _E value_type;
typedef const _E& reference;
typedef const _E& const_reference;
typedef size_t size_type;
typedef const _E* iterator;
typedef const _E* const_iterator;
initializer_list() : __begin_(nullptr), __size_(0) {}
size_t size() const {return __size_;}
const _E* begin() const {return __begin_;}
const _E* end() const {return __begin_ + __size_;}
};
}
template < bool condition, typename T = void >
struct enable_if { typedef T type; };
template< typename T >
struct enable_if< false, T > {};
// PR5876
namespace Casts {
template< unsigned O >
void implicit(typename enable_if< O <= 4 >::type* = 0) {
}
template< unsigned O >
void cstyle(typename enable_if< O <= (unsigned)4 >::type* = 0) {
}
template< unsigned O >
void functional(typename enable_if< O <= unsigned(4) >::type* = 0) {
}
template< unsigned O >
void static_(typename enable_if< O <= static_cast<unsigned>(4) >::type* = 0) {
}
template< typename T >
void auto_(decltype(new auto(T()))) {
}
template< typename T >
void scalar_(decltype(T(), int())) {
}
// FIXME: Test const_cast, reinterpret_cast, dynamic_cast, which are
// a bit harder to use in template arguments.
template <unsigned N> struct T {};
template <int N> T<N> f() { return T<N>(); }
// CHECK-LABEL: define weak_odr void @_ZN5Casts8implicitILj4EEEvPN9enable_ifIXleT_Li4EEvE4typeE
template void implicit<4>(void*);
// CHECK-LABEL: define weak_odr void @_ZN5Casts6cstyleILj4EEEvPN9enable_ifIXleT_cvjLi4EEvE4typeE
template void cstyle<4>(void*);
// CHECK-LABEL: define weak_odr void @_ZN5Casts10functionalILj4EEEvPN9enable_ifIXleT_cvjLi4EEvE4typeE
template void functional<4>(void*);
// CHECK-LABEL: define weak_odr void @_ZN5Casts7static_ILj4EEEvPN9enable_ifIXleT_cvjLi4EEvE4typeE
template void static_<4>(void*);
// CHECK-LABEL: define weak_odr void @_ZN5Casts1fILi6EEENS_1TIXT_EEEv
template T<6> f<6>();
// CHECK-LABEL: define weak_odr void @_ZN5Casts5auto_IiEEvDTnw_DapicvT__EEE(
template void auto_<int>(int*);
// CHECK-LABEL: define weak_odr void @_ZN5Casts7scalar_IiEEvDTcmcvT__Ecvi_EE(
template void scalar_<int>(int);
}
namespace test1 {
short foo(short);
int foo(int);
// CHECK-LABEL: define linkonce_odr signext i16 @_ZN5test11aIsEEDTcl3foocvT__EEES1_(
template <class T> auto a(T t) -> decltype(foo(T())) { return foo(t); }
// CHECK-LABEL: define linkonce_odr signext i16 @_ZN5test11bIsEEDTcp3foocvT__EEES1_(
template <class T> auto b(T t) -> decltype((foo)(T())) { return (foo)(t); }
void test(short s) {
a(s);
b(s);
}
}
namespace test2 {
template <class T> void a(T x, decltype(x()) y) {}
template <class T> auto b(T x) -> decltype(x()) { return x(); }
template <class T> void c(T x, void (*p)(decltype(x()))) {}
template <class T> void d(T x, auto (*p)() -> decltype(x())) {}
template <class T> void e(auto (*p)(T y) -> decltype(y())) {}
template <class T> void f(void (*p)(T x, decltype(x()) y)) {}
template <class T> void g(T x, decltype(x()) y) {
static decltype(x()) variable;
variable = 0;
}
template <class T> void h(T x, decltype((decltype(x())(*)()) 0) y) {}
template <class T> void i(decltype((auto (*)(T x) -> decltype(x())) 0) y) {}
float foo();
void bar(float);
float baz(float(*)());
void fred(float(*)(), float);
// CHECK-LABEL: define void @_ZN5test211instantiateEv
void instantiate() {
// CHECK: call void @_ZN5test21aIPFfvEEEvT_DTclfL0p_EE(
a(foo, 0.0f);
// CHECK: call float @_ZN5test21bIPFfvEEEDTclfp_EET_(
(void) b(foo);
// CHECK: call void @_ZN5test21cIPFfvEEEvT_PFvDTclfL1p_EEE(
c(foo, bar);
// CHECK: call void @_ZN5test21dIPFfvEEEvT_PFDTclfL0p_EEvE(
d(foo, foo);
// CHECK: call void @_ZN5test21eIPFfvEEEvPFDTclfp_EET_E(
e(baz);
// CHECK: call void @_ZN5test21fIPFfvEEEvPFvT_DTclfL0p_EEE(
f(fred);
// CHECK: call void @_ZN5test21gIPFfvEEEvT_DTclfL0p_EE(
g(foo, 0.0f);
// CHECK: call void @_ZN5test21hIPFfvEEEvT_DTcvPFDTclfL0p_EEvELi0EE(
h(foo, foo);
// CHECK: call void @_ZN5test21iIPFfvEEEvDTcvPFDTclfp_EET_ELi0EE(
i<float(*)()>(baz);
}
// CHECK: store float {{.*}}, float* @_ZZN5test21gIPFfvEEEvT_DTclfL0p_EEE8variable,
}
namespace test3 {
template <class T, class U> void a(T x, U y, decltype(x.*y) z) {}
struct X {
int *member;
};
// CHECK-LABEL: define void @_ZN5test311instantiateEv
void instantiate() {
X x;
int *ip;
// CHECK: call void @_ZN5test31aINS_1XEMS1_PiEEvT_T0_DTdsfL0p_fL0p0_E
a(x, &X::member, ip);
}
}
namespace test4 {
struct X {
X(int);
};
template <typename T>
void tf1(decltype(new T(1)) p)
{}
template <typename T>
void tf2(decltype(new T({1})) p)
{}
template <typename T>
void tf3(decltype(new T{1}) p)
{}
// CHECK: void @_ZN5test43tf1INS_1XEEEvDTnw_T_piLi1EEE
template void tf1<X>(X*);
// CHECK: void @_ZN5test43tf2INS_1XEEEvDTnw_T_piilLi1EEEE
template void tf2<X>(X*);
// CHECK: void @_ZN5test43tf3INS_1XEEEvDTnw_T_ilLi1EEE
template void tf3<X>(X*);
}
namespace test5 {
template <typename T> void a(decltype(noexcept(T()))) {}
template void a<int>(decltype(noexcept(int())));
// CHECK: void @_ZN5test51aIiEEvDTnxcvT__EE(
}
|
