1// RUN: %clang_cc1 -std=c++11 -emit-llvm -triple=x86_64-apple-darwin9 -o - %s | FileCheck %s
2
3template<unsigned I, typename ...Types>
4struct X { };
5
6template<typename T> struct identity { using type = T; };
7template<typename T> struct add_reference;
8template<typename ...Types> struct tuple { };
9template<int ...Values> struct int_tuple { };
10template<template<typename> class ...Templates> struct template_tuple { };
11template<typename ...T> using ArrayOfN = int[sizeof...(T)];
12
13// CHECK-LABEL: define weak_odr void @_Z2f0IJEEv1XIXsZT_EJDpRT_EE
14template<typename ...Types>
15void f0(X<sizeof...(Types), Types&...>) { }
16
17template void f0(X<0>);
18
19// CHECK-LABEL: define weak_odr void @_Z2f0IJifdEEv1XIXsZT_EJDpRT_EE
20template void f0<int, float, double>(X<3, int&, float&, double&>);
21
22// Mangling for template argument packs
23template<typename ...Types> void f1() {}
24// CHECK-LABEL: define weak_odr void @_Z2f1IJEEvv
25template void f1<>();
26// CHECK-LABEL: define weak_odr void @_Z2f1IJiEEvv
27template void f1<int>();
28// CHECK-LABEL: define weak_odr void @_Z2f1IJifEEvv
29template void f1<int, float>();
30
31// Mangling function parameter packs
32template<typename ...Types> void f2(Types...) {}
33// CHECK-LABEL: define weak_odr void @_Z2f2IJEEvDpT_
34template void f2<>();
35// CHECK-LABEL: define weak_odr void @_Z2f2IJiEEvDpT_
36template void f2<int>(int);
37// CHECK-LABEL: define weak_odr void @_Z2f2IJifEEvDpT_
38template void f2<int, float>(int, float);
39
40// Mangling non-trivial function parameter packs
41template<typename ...Types> void f3(const Types *...) {}
42// CHECK-LABEL: define weak_odr void @_Z2f3IJEEvDpPKT_
43template void f3<>();
44// CHECK-LABEL: define weak_odr void @_Z2f3IJiEEvDpPKT_
45template void f3<int>(const int*);
46// CHECK-LABEL: define weak_odr void @_Z2f3IJifEEvDpPKT_
47template void f3<int, float>(const int*, const float*);
48
49// Mangling of type pack expansions in a template argument
50template<typename ...Types> tuple<Types...> f4() {}
51// CHECK-LABEL: define weak_odr void @_Z2f4IJifdEE5tupleIJDpT_EEv
52template tuple<int, float, double> f4();
53
54// Mangling of type pack expansions in a function type
55template<typename R, typename ...ArgTypes> identity<R(ArgTypes...)> f5() {}
56// CHECK-LABEL: define weak_odr void @_Z2f5IiJifdEE8identityIFT_DpT0_EEv
57template identity<int(int, float, double)> f5();
58
59// Mangling of non-type template argument expansions
60template<int ...Values> int_tuple<Values...> f6() {}
61// CHECK-LABEL: define weak_odr void @_Z2f6IJLi1ELi2ELi3EEE9int_tupleIJXspT_EEEv
62template int_tuple<1, 2, 3> f6();
63
64// Mangling of template template argument expansions
65template<template<typename> class ...Templates>
66template_tuple<Templates...> f7() {}
67// CHECK-LABEL: define weak_odr void @_Z2f7IJ8identity13add_referenceEE14template_tupleIJDpT_EEv
68template template_tuple<identity, add_reference> f7();
69
70template<typename T, typename ...U> void f8(ArrayOfN<int, U..., T, typename U::type...>&) {}
71// CHECK-LABEL: define weak_odr void @_Z2f8IiJ8identityIiES0_IfEEEvRAsPiDpT0_T_DpNS3_4typeEE_i
72template void f8<int, identity<int>, identity<float>>(int (&)[6]);
73
74template<typename ...T> void f10(ArrayOfN<T...> &) {}
75// FIXME: This is wrong; should be @_Z3f10IJifEEvRAsZT__i
76// CHECK-LABEL: define weak_odr void @_Z3f10IJifEEvRAsPDpT_E_i
77template void f10<int, float>(int (&)[2]);
78