xref: /aosp_15_r20/external/clang/test/CodeGenCXX/variadic-templates.cpp (revision 67e74705e28f6214e480b399dd47ea732279e315) 
1*67e74705SXin Li // RUN: %clang_cc1 -std=c++11 -triple x86_64-apple-darwin10 -emit-llvm -o - %s | FileCheck %s
2*67e74705SXin Li 
3*67e74705SXin Li template<typename ...Types>
get_num_types(Types...)4*67e74705SXin Li int get_num_types(Types...) {
5*67e74705SXin Li   return sizeof...(Types);
6*67e74705SXin Li }
7*67e74705SXin Li 
8*67e74705SXin Li // CHECK-LABEL: define weak_odr i32 @_Z13get_num_typesIJifdEEiDpT_
9*67e74705SXin Li // CHECK: ret i32 3
10*67e74705SXin Li template int get_num_types(int, float, double);
11*67e74705SXin Li 
12*67e74705SXin Li // PR10260 - argument packs that expand to nothing
13*67e74705SXin Li namespace test1 {
foo()14*67e74705SXin Li   template <class... T> void foo() {
15*67e74705SXin Li     int values[sizeof...(T)+1] = { T::value... };
16*67e74705SXin Li     // CHECK-LABEL: define linkonce_odr void @_ZN5test13fooIJEEEvv()
17*67e74705SXin Li     // CHECK: alloca [1 x i32], align 4
18*67e74705SXin Li   }
19*67e74705SXin Li 
test()20*67e74705SXin Li   void test() {
21*67e74705SXin Li     foo<>();
22*67e74705SXin Li   }
23*67e74705SXin Li }
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