clang/test/CodeGenCXX/variadic-templates.cpp

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